:root {
    --primary: #3b82f6;
    --primary-rgb: 59, 130, 246;
    --primary-hover: #2563eb;
    --secondary: #0f172a;
    --success: #10b981;
    --danger: #ef4444;
    --warning: #f59e0b;
    --info: #3b82f6;
    --body-bg: #f4f7fb;
    --card-bg: #ffffff;
    --text-primary: #0f172a;
    --text-secondary: #64748b;
    --text-muted: #94a3b8;
    --border-color: #e2e8f0;
    --input-bg: #ffffff;
    --hover-bg: #f1f5f9;
    --sidebar-bg: #0b1220;
    --sidebar-text: #94a3b8;
    --sidebar-text-active: #ffffff;
    --sidebar-hover-bg: rgba(255, 255, 255, 0.06);
    --sidebar-border: rgba(255, 255, 255, 0.06);
    --sidebar-width: 260px;
    --header-height: 60px;
    --space-page: 1rem;
    --space-safe-bottom: calc(5rem + env(safe-area-inset-bottom, 24px));
    --space-card: 1rem;
    --space-gap: 0.75rem;
    --space-section: 0.875rem;
    --space-field: 0.625rem;
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 20px;
    --shadow-sm: 0 1px 2px rgb(15 23 42 / 0.04), 0 1px 3px rgb(15 23 42 / 0.06);
    --shadow-md: 0 4px 16px rgb(15 23 42 / 0.08), 0 2px 6px rgb(15 23 42 / 0.04);
    --shadow-lg: 0 16px 40px rgb(15 23 42 / 0.12), 0 4px 12px rgb(15 23 42 / 0.06);
    --shadow-glow: 0 0 0 1px rgb(59 130 246 / 0.08), 0 8px 24px rgb(59 130 246 / 0.18);
    --glass-bg: rgba(255, 255, 255, 0.78);
    --glass-border: rgba(255, 255, 255, 0.65);
    --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
    --ease-spring: cubic-bezier(0.22, 1, 0.36, 1);
    --duration-fast: 0.18s;
    --duration-base: 0.28s;
    --duration-slow: 0.45s;
    --editor-bg: #ffffff;
    --editor-text: #1e293b;
    --preview-bg: #ffffff;
    --preview-text: #1e293b;
    --chip-bg: #eff6ff;
    --chip-border: #bfdbfe;
    --chip-text: #1d4ed8;
    --code-bg: #0f172a;
    --code-text: #e2e8f0;
    --row-hover: rgba(241, 245, 249, 0.85);
}

[data-theme="dark"] {
    --body-bg: #0b1220;
    --card-bg: #141c2e;
    --text-primary: #f1f5f9;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;
    --border-color: rgba(148, 163, 184, 0.14);
    --input-bg: #0f172a;
    --hover-bg: rgba(148, 163, 184, 0.08);
    --shadow-sm: 0 1px 2px rgb(0 0 0 / 0.35);
    --shadow-md: 0 8px 24px rgb(0 0 0 / 0.35);
    --shadow-lg: 0 20px 48px rgb(0 0 0 / 0.45);
    --shadow-glow: 0 0 0 1px rgb(59 130 246 / 0.15), 0 8px 32px rgb(59 130 246 / 0.22);
    --glass-bg: rgba(20, 28, 46, 0.82);
    --glass-border: rgba(148, 163, 184, 0.12);
    --editor-bg: #0b1220;
    --editor-text: #e2e8f0;
    --preview-bg: #0b1220;
    --preview-text: #e2e8f0;
    --chip-bg: rgba(59, 130, 246, 0.14);
    --chip-border: rgba(96, 165, 250, 0.28);
    --chip-text: #93c5fd;
    --code-bg: #020617;
    --code-text: #cbd5e1;
    --row-hover: rgba(59, 130, 246, 0.06);
}

* { box-sizing: border-box; }

html {
    -webkit-text-size-adjust: 100%;
    scroll-padding-bottom: var(--space-safe-bottom);
    background-color: var(--body-bg);
}

body {
    margin: 0;
    overflow-x: clip;
    overflow-y: auto;
    min-height: 100vh;
    min-height: 100dvh;
    padding-bottom: env(safe-area-inset-bottom, 0px);
    font-family: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, sans-serif;
    background-color: var(--body-bg);
    background-image:
        radial-gradient(ellipse 80% 55% at 8% -8%, rgba(var(--primary-rgb), 0.09), transparent 52%),
        radial-gradient(ellipse 55% 45% at 100% 0%, rgba(var(--primary-rgb), 0.06), transparent 48%);
    background-repeat: no-repeat;
    background-attachment: fixed;
    color: var(--text-primary);
    font-size: 13.5px;
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
    transition: background-color var(--duration-base) var(--ease-out), color var(--duration-base) var(--ease-out);
}

body.auth-page {
    background-image: none;
}

a {
    color: var(--primary);
    text-decoration: none;
    transition: color var(--duration-fast) var(--ease-out);
}

a:hover:not(.btn) { color: var(--primary-hover); }

/* Layout */
.page-wrapper {
    min-height: 0;
    overflow-x: clip;
    background: transparent;
}

.sidebar {
    width: var(--sidebar-width);
    background:
        linear-gradient(180deg, rgba(255, 255, 255, 0.03) 0%, transparent 28%),
        var(--sidebar-bg);
    position: fixed;
    inset: 0 auto 0 0;
    z-index: 1050;
    display: flex;
    flex-direction: column;
    border-right: 1px solid var(--sidebar-border);
    transition: transform var(--duration-slow) var(--ease-spring);
    box-shadow: 4px 0 24px rgb(0 0 0 / 0.12);
}

.sidebar-header {
    min-height: var(--header-height);
    padding: 0.75rem 1rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    border-bottom: 1px solid var(--sidebar-border);
}

.sidebar-brand {
    display: flex;
    align-items: center;
    gap: 0.65rem;
    color: #fff;
    font-weight: 700;
    font-size: 0.95rem;
    letter-spacing: -0.02em;
}

.sidebar-brand-icon {
    width: 36px;
    height: 36px;
    border-radius: 10px;
    display: grid;
    place-items: center;
    background: linear-gradient(135deg, rgba(var(--primary-rgb), 0.28), rgba(var(--primary-rgb), 0.12));
    color: #93c5fd;
    box-shadow: 0 4px 14px rgba(var(--primary-rgb), 0.25);
    transition: transform var(--duration-base) var(--ease-spring);
}

.sidebar-brand:hover .sidebar-brand-icon {
    transform: scale(1.05) rotate(-4deg);
}

.sidebar-close {
    display: none;
    background: none;
    border: 0;
    color: var(--sidebar-text);
    font-size: 1.25rem;
    cursor: pointer;
    transition: color var(--duration-fast) var(--ease-out), transform var(--duration-fast) var(--ease-out);
}

.sidebar-close:hover {
    color: #fff;
    transform: rotate(90deg);
}

.sidebar-menu {
    padding: 0.75rem 0.65rem;
    display: flex;
    flex-direction: column;
    gap: 0.2rem;
    overflow-y: auto;
}

.sidebar-menu a {
    position: relative;
    display: flex;
    align-items: center;
    gap: 0.65rem;
    padding: 0.62rem 0.85rem;
    border-radius: var(--radius-sm);
    color: var(--sidebar-text);
    font-weight: 500;
    font-size: 0.88rem;
    transition:
        background var(--duration-base) var(--ease-out),
        color var(--duration-base) var(--ease-out),
        transform var(--duration-base) var(--ease-spring);
}

.sidebar-menu a::before {
    content: '';
    position: absolute;
    left: 0;
    top: 50%;
    width: 3px;
    height: 0;
    border-radius: 0 4px 4px 0;
    background: linear-gradient(180deg, #60a5fa, var(--primary));
    transform: translateY(-50%);
    transition: height var(--duration-base) var(--ease-spring);
}

.sidebar-menu a i {
    width: 18px;
    text-align: center;
    transition: transform var(--duration-base) var(--ease-spring), color var(--duration-base) var(--ease-out);
}

.sidebar-menu a:hover {
    background: var(--sidebar-hover-bg);
    color: var(--sidebar-text-active);
    text-decoration: none;
    transform: translateX(2px);
}

.sidebar-menu a:hover i {
    transform: scale(1.1);
    color: #93c5fd;
}

.sidebar-menu a.active {
    background: rgba(var(--primary-rgb), 0.14);
    color: var(--sidebar-text-active);
    box-shadow: inset 0 0 0 1px rgba(var(--primary-rgb), 0.18);
}

.sidebar-menu a.active::before {
    height: 55%;
}

.sidebar-menu a.active i {
    color: #93c5fd;
}

.sidebar-logout { margin-top: auto; }

.sidebar-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: rgb(15 23 42 / 0.45);
    backdrop-filter: blur(4px);
    -webkit-backdrop-filter: blur(4px);
    z-index: 1040;
    opacity: 0;
    transition: opacity var(--duration-base) var(--ease-out);
}

body.sidebar-open .sidebar-overlay {
    display: block;
    opacity: 1;
}

body.sidebar-open {
    overflow: hidden;
    touch-action: none;
}

.main-content {
    margin-left: var(--sidebar-width);
    min-height: 0;
    min-width: 0;
    width: calc(100% - var(--sidebar-width));
    padding-bottom: env(safe-area-inset-bottom, 0px);
    background: transparent;
}

.main-header {
    position: sticky;
    top: 0;
    z-index: 100;
    min-height: var(--header-height);
    padding: 0 var(--space-page);
    background: var(--glass-bg);
    backdrop-filter: blur(16px) saturate(180%);
    -webkit-backdrop-filter: blur(16px) saturate(180%);
    border-bottom: 1px solid var(--glass-border);
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 0.75rem;
    box-shadow: var(--shadow-sm);
    transition: background var(--duration-base) var(--ease-out), border-color var(--duration-base) var(--ease-out);
}

.header-left {
    display: flex;
    align-items: center;
    gap: 0.65rem;
    min-width: 0;
}

.header-title h1 {
    margin: 0;
    font-size: 1.1rem;
    font-weight: 700;
    letter-spacing: -0.02em;
}

.header-title p {
    margin: 0.1rem 0 0;
    color: var(--text-secondary);
    font-size: 0.78rem;
}

.header-right {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    flex-shrink: 0;
}

.header-actions {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
}

.header-user-name {
    padding: 0.35rem 0.75rem;
    border-radius: 999px;
    background: rgba(var(--primary-rgb), 0.08);
    color: var(--text-secondary);
    font-size: 0.78rem;
    font-weight: 600;
    border: 1px solid rgba(var(--primary-rgb), 0.12);
    transition: background var(--duration-fast) var(--ease-out), border-color var(--duration-fast) var(--ease-out);
}

.sidebar-toggle {
    display: none;
    width: 38px;
    height: 38px;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    background: var(--card-bg);
    color: var(--text-primary);
    cursor: pointer;
    transition: background var(--duration-fast) var(--ease-out), transform var(--duration-fast) var(--ease-spring);
}

.sidebar-toggle:hover {
    background: var(--hover-bg);
    transform: scale(1.04);
}

.page-body {
    padding: var(--space-page);
    padding-bottom: var(--space-page);
    min-width: 0;
    width: 100%;
    background: transparent;
}

@keyframes ecs-fade-up {
    from {
        opacity: 0;
        transform: translateY(14px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes ecs-scale-in {
    from {
        opacity: 0;
        transform: scale(0.96);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

@keyframes ecs-shimmer {
    0% { background-position: -200% 0; }
    100% { background-position: 200% 0; }
}

/* Page entrance animations — only when motion is allowed */
@media (prefers-reduced-motion: no-preference) {
    body.ecs-ready .page-body > * {
        animation: ecs-fade-up var(--duration-slow) var(--ease-out) both;
    }

    body.ecs-ready .page-body > *:nth-child(1) { animation-delay: 0.04s; }
    body.ecs-ready .page-body > *:nth-child(2) { animation-delay: 0.1s; }
    body.ecs-ready .page-body > *:nth-child(3) { animation-delay: 0.16s; }
    body.ecs-ready .page-body > *:nth-child(4) { animation-delay: 0.22s; }
    body.ecs-ready .page-body > *:nth-child(5) { animation-delay: 0.28s; }
}

/* Cards & stats */
.card {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: var(--space-card);
    margin-bottom: var(--space-section);
    box-shadow: var(--shadow-sm);
    transition:
        transform var(--duration-base) var(--ease-spring),
        box-shadow var(--duration-base) var(--ease-out),
        border-color var(--duration-base) var(--ease-out);
}

.card:hover {
    box-shadow: var(--shadow-md);
    border-color: rgba(var(--primary-rgb), 0.12);
}

.card-head {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 0.65rem;
    margin-bottom: 0.65rem;
}

.card-head h2 {
    margin: 0;
    font-size: 0.95rem;
    font-weight: 700;
}

.card-sub {
    margin: 0.2rem 0 0;
    color: var(--text-secondary);
    font-size: 0.8rem;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: var(--space-gap);
    margin-bottom: var(--space-section);
}

.stats-grid--send {
    grid-template-columns: repeat(4, minmax(0, 1fr));
}

.stat-card .stat-value-sm {
    font-size: clamp(0.95rem, 2vw, 1.15rem);
    text-transform: capitalize;
}

/* Send stats chips */
.send-stats {
    display: inline-flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 0.35rem;
}

.send-stat {
    display: inline-flex;
    align-items: center;
    gap: 0.3rem;
    padding: 0.22rem 0.55rem;
    border-radius: 999px;
    font-size: 0.78rem;
    font-weight: 700;
    line-height: 1.2;
    white-space: nowrap;
}

.send-stat--solo {
    padding: 0;
    background: transparent;
    font-size: 0.82rem;
}

.send-stat--sent {
    background: rgba(16, 185, 129, 0.12);
    color: var(--success);
}

.send-stat--failed {
    background: rgba(239, 68, 68, 0.12);
    color: var(--danger);
}

.send-stat--pending {
    background: rgba(var(--primary-rgb), 0.12);
    color: var(--primary);
}

.send-stat--solo.send-stat--sent,
.send-stat--solo.send-stat--failed,
.send-stat--solo.send-stat--pending {
    background: transparent;
}

.table-progress {
    display: grid;
    gap: 0.25rem;
    min-width: 88px;
}

.table-progress .progress-wrap {
    margin: 0;
}

.stat-card {
    position: relative;
    overflow: hidden;
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: var(--space-card);
    box-shadow: var(--shadow-sm);
    transition:
        transform var(--duration-base) var(--ease-spring),
        box-shadow var(--duration-base) var(--ease-out),
        border-color var(--duration-base) var(--ease-out);
}

.stat-card::after {
    content: '';
    position: absolute;
    top: -30%;
    right: -20%;
    width: 120px;
    height: 120px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(var(--primary-rgb), 0.12), transparent 70%);
    pointer-events: none;
    transition: transform var(--duration-slow) var(--ease-out);
}

.stat-card:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-md);
    border-color: rgba(var(--primary-rgb), 0.15);
}

.stat-card:hover::after {
    transform: scale(1.2);
}

.stat-card .stat-icon {
    width: 36px;
    height: 36px;
    border-radius: 10px;
    display: grid;
    place-items: center;
    margin-bottom: 0.65rem;
    font-size: 0.95rem;
    background: rgba(var(--primary-rgb), 0.1);
    color: var(--primary);
    transition: transform var(--duration-base) var(--ease-spring);
}

.stat-card:hover .stat-icon {
    transform: scale(1.08);
}

.stat-card.primary .stat-icon { background: rgba(var(--primary-rgb), 0.12); color: var(--primary); }
.stat-card.success .stat-icon { background: rgba(16, 185, 129, 0.12); color: var(--success); }
.stat-card.warning .stat-icon { background: rgba(245, 158, 11, 0.12); color: var(--warning); }

.stat-card .label {
    color: var(--text-secondary);
    font-size: 0.72rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.06em;
}

.stat-card .value {
    margin-top: 0.25rem;
    font-size: clamp(1.35rem, 2.5vw, 1.85rem);
    font-weight: 800;
    line-height: 1.1;
    letter-spacing: -0.03em;
    transition: transform var(--duration-base) var(--ease-spring);
}

.stat-card:hover .value {
    transform: scale(1.02);
    transform-origin: left center;
}

.stat-card.primary .value { color: var(--primary); }
.stat-card.success .value { color: var(--success); }
.stat-card.warning .value { color: var(--warning); }

/* Forms */
.form-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: var(--space-gap);
    align-items: start;
}

.form-grid > .form-group {
    margin-bottom: 0;
}

.form-group.form-full,
.form-grid .form-full {
    grid-column: 1 / -1;
}

.form-stack {
    display: flex;
    flex-direction: column;
    gap: var(--space-field);
}

.form-stack > .form-group {
    margin-bottom: 0;
}

.form-group.form-narrow {
    max-width: 420px;
}

.form-label {
    display: block;
    margin-bottom: 0.3rem;
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--text-primary);
}

.form-hint {
    margin: 0.3rem 0 0;
    color: var(--text-secondary);
    font-size: 0.75rem;
}

input[type="text"],
input[type="email"],
input[type="password"],
input[type="number"],
textarea {
    width: 100%;
    padding: 0.58rem 0.75rem;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    background: var(--input-bg);
    color: var(--text-primary);
    font: inherit;
    transition:
        border-color var(--duration-base) var(--ease-out),
        box-shadow var(--duration-base) var(--ease-out),
        background var(--duration-base) var(--ease-out),
        transform var(--duration-fast) var(--ease-out);
}

select {
    width: 100%;
    padding: 0.58rem 2.35rem 0.58rem 0.75rem;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    background-color: var(--input-bg);
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%2394a3b8' stroke-width='2.5' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 0.75rem center;
    background-size: 0.85rem;
    color: var(--text-primary);
    font: inherit;
    appearance: none;
    -webkit-appearance: none;
    cursor: pointer;
    transition:
        border-color var(--duration-base) var(--ease-out),
        box-shadow var(--duration-base) var(--ease-out),
        background-color var(--duration-base) var(--ease-out),
        transform var(--duration-fast) var(--ease-out);
}

input[type="text"]:hover,
input[type="email"]:hover,
input[type="password"]:hover,
input[type="number"]:hover,
select:hover,
textarea:hover {
    border-color: rgba(var(--primary-rgb), 0.28);
}

input:focus, select:focus, textarea:focus {
    outline: none;
    border-color: rgba(var(--primary-rgb), 0.55);
    box-shadow: 0 0 0 4px rgba(var(--primary-rgb), 0.1);
    transform: translateY(-1px);
}

input[type="file"]:not(.ecs-file-upload-input) {
    width: 100%;
    padding: 0.58rem 0.75rem;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    background: var(--input-bg);
    color: var(--text-primary);
    font: inherit;
    transition: border-color var(--duration-base) var(--ease-out);
}

textarea { min-height: 88px; resize: vertical; }

.form-check {
    display: flex;
    align-items: center;
    gap: 0.45rem;
    min-height: 34px;
}

.form-check input { width: auto; margin: 0; }

.input-prefix-wrap {
    display: flex;
    align-items: stretch;
}

.input-prefix {
    display: inline-flex;
    align-items: center;
    padding: 0 0.65rem;
    background: var(--hover-bg);
    border: 1px solid var(--border-color);
    border-right: 0;
    border-radius: var(--radius-sm) 0 0 var(--radius-sm);
    color: var(--text-muted);
    font-weight: 600;
    white-space: nowrap;
}

.input-prefix-wrap input {
    border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
    flex: 1;
    min-width: 0;
}

.form-actions {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
    margin-top: 0.75rem;
    padding-top: 0.65rem;
    border-top: 1px solid var(--border-color);
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.4rem;
    padding: 0.5rem 0.85rem;
    border: 0;
    border-radius: var(--radius-sm);
    font: inherit;
    font-weight: 600;
    cursor: pointer;
    position: relative;
    overflow: hidden;
    transition:
        transform var(--duration-fast) var(--ease-spring),
        box-shadow var(--duration-base) var(--ease-out),
        background var(--duration-base) var(--ease-out),
        color var(--duration-base) var(--ease-out),
        border-color var(--duration-base) var(--ease-out);
}

.btn:hover {
    transform: translateY(-2px);
}

.btn:active {
    transform: translateY(0) scale(0.98);
    transition-duration: 0.08s;
}

.btn:focus-visible {
    outline: none;
    box-shadow: 0 0 0 4px rgba(var(--primary-rgb), 0.22);
}

a.btn:hover,
a.btn:focus-visible {
    text-decoration: none;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary) 0%, #1d4ed8 100%);
    color: #fff;
    box-shadow: var(--shadow-glow);
}

.btn-primary:hover {
    box-shadow: 0 0 0 1px rgb(59 130 246 / 0.12), 0 12px 28px rgb(59 130 246 / 0.28);
}

a.btn-primary:hover,
a.btn-primary:focus-visible {
    color: #fff;
}

.btn-secondary {
    background: var(--hover-bg);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
}

.btn-secondary:hover {
    background: var(--card-bg);
    border-color: rgba(var(--primary-rgb), 0.2);
}

a.btn-secondary:hover,
a.btn-secondary:focus-visible { color: var(--text-primary); }

.btn-success {
    background: linear-gradient(135deg, var(--success), #059669);
    color: #fff;
    box-shadow: 0 4px 14px rgba(16, 185, 129, 0.25);
}

a.btn-success:hover,
a.btn-success:focus-visible { color: #fff; }

.btn-warning {
    background: linear-gradient(135deg, var(--warning), #d97706);
    color: #fff;
    box-shadow: 0 4px 14px rgba(245, 158, 11, 0.25);
}

a.btn-warning:hover,
a.btn-warning:focus-visible { color: #fff; }

.btn-danger {
    background: linear-gradient(135deg, var(--danger), #dc2626);
    color: #fff;
    box-shadow: 0 4px 14px rgba(239, 68, 68, 0.25);
}

a.btn-danger:hover,
a.btn-danger:focus-visible { color: #fff; }

.btn-outline {
    background: transparent;
    border: 1px solid var(--border-color);
    color: var(--text-primary);
}

.btn-outline:hover {
    background: rgba(var(--primary-rgb), 0.06);
    border-color: rgba(var(--primary-rgb), 0.25);
    color: var(--primary);
}

a.btn-outline:hover,
a.btn-outline:focus-visible {
    color: var(--primary);
}

.btn-sm { padding: 0.35rem 0.65rem; font-size: 0.78rem; }

/* Alerts */
.alert {
    padding: 0.65rem 0.85rem;
    border-radius: var(--radius-sm);
    margin-bottom: 0.75rem;
    border: 1px solid transparent;
    animation: ecs-fade-up var(--duration-base) var(--ease-out);
}

.alert-success { background: #ecfdf5; color: #166534; border-color: #bbf7d0; }
.alert-danger { background: #fef2f2; color: #991b1b; border-color: #fecaca; }
.alert-warning { background: #fffbeb; color: #92400e; border-color: #fde68a; }
.alert-info { background: #eff6ff; color: #1e40af; border-color: #bfdbfe; }

[data-theme="dark"] .alert-success { background: rgba(22, 163, 74, 0.15); color: #86efac; border-color: rgba(34, 197, 94, 0.25); }
[data-theme="dark"] .alert-danger { background: rgba(220, 38, 38, 0.15); color: #fca5a5; border-color: rgba(239, 68, 68, 0.25); }
[data-theme="dark"] .alert-warning { background: rgba(217, 119, 6, 0.15); color: #fcd34d; border-color: rgba(245, 158, 11, 0.25); }
[data-theme="dark"] .alert-info { background: rgba(37, 99, 235, 0.15); color: #93c5fd; border-color: rgba(59, 130, 246, 0.25); }

/* Tables */
.table-wrap {
    overflow-x: auto;
    border-radius: var(--radius-md);
    border: 1px solid var(--border-color);
}

table {
    width: 100%;
    border-collapse: collapse;
}

th, td {
    padding: 0.65rem 0.75rem;
    border-bottom: 1px solid var(--border-color);
    text-align: left;
    vertical-align: top;
    transition: background var(--duration-fast) var(--ease-out);
}

th {
    font-size: 0.72rem;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    color: var(--text-secondary);
    background: var(--hover-bg);
    font-weight: 700;
}

tbody tr {
    transition: background var(--duration-fast) var(--ease-out), transform var(--duration-fast) var(--ease-out);
}

tbody tr:hover {
    background: var(--row-hover);
}

tbody tr:last-child td {
    border-bottom: 0;
}

/* Badges */
.badge {
    display: inline-flex;
    align-items: center;
    padding: 0.22rem 0.6rem;
    border-radius: 999px;
    font-size: 0.72rem;
    font-weight: 700;
    text-transform: capitalize;
    transition: transform var(--duration-fast) var(--ease-spring);
}

tr:hover .badge {
    transform: scale(1.03);
}

.badge-success { background: #dcfce7; color: #166534; }
.badge-warning { background: #fef3c7; color: #92400e; }
.badge-danger { background: #fee2e2; color: #991b1b; }
.badge-info { background: #dbeafe; color: #1e40af; }
.badge-muted { background: #f1f5f9; color: #64748b; }

[data-theme="dark"] .badge-success { background: rgba(34, 197, 94, 0.2); color: #86efac; }
[data-theme="dark"] .badge-warning { background: rgba(245, 158, 11, 0.2); color: #fcd34d; }
[data-theme="dark"] .badge-danger { background: rgba(239, 68, 68, 0.2); color: #fca5a5; }
[data-theme="dark"] .badge-info { background: rgba(59, 130, 246, 0.2); color: #93c5fd; }
[data-theme="dark"] .badge-muted { background: rgba(148, 163, 184, 0.15); color: #cbd5e1; }

/* Progress */
.progress-wrap {
    height: 8px;
    background: var(--hover-bg);
    border-radius: 999px;
    overflow: hidden;
    margin: 0.45rem 0 0.25rem;
}

.progress-bar {
    height: 100%;
    background: linear-gradient(90deg, var(--primary), #60a5fa, var(--primary));
    background-size: 200% 100%;
    width: 0;
    transition: width var(--duration-slow) var(--ease-out);
    animation: ecs-shimmer 2.5s linear infinite;
    border-radius: 999px;
}

/* Placeholder chips */
.placeholder-chips {
    display: flex;
    flex-wrap: wrap;
    gap: 0.35rem;
    margin-bottom: 0.45rem;
}

.chip-btn {
    border: 1px solid var(--chip-border);
    background: var(--chip-bg);
    color: var(--chip-text);
    border-radius: 999px;
    padding: 0.28rem 0.65rem;
    font-size: 0.72rem;
    font-weight: 600;
    cursor: pointer;
    transition:
        transform var(--duration-fast) var(--ease-spring),
        box-shadow var(--duration-base) var(--ease-out),
        background var(--duration-base) var(--ease-out);
}

.chip-btn:hover {
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(var(--primary-rgb), 0.15);
}

/* Rich editor */
.ecs-rich-editor {
    overflow: hidden;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    background: var(--card-bg);
    box-shadow: var(--shadow-sm);
}

.ecs-rich-toolbar {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 0.3rem;
    padding: 0.45rem;
    border-bottom: 1px solid var(--border-color);
    background: var(--hover-bg);
}

.ecs-rich-group {
    display: inline-flex;
    align-items: center;
    gap: 0.25rem;
    padding-right: 0.55rem;
    margin-right: 0.15rem;
    border-right: 1px solid var(--border-color);
}

.ecs-rich-group:last-child { border-right: 0; }
.ecs-rich-group--wide { gap: 0.45rem; }

.ecs-rich-tool {
    width: 32px;
    height: 32px;
    border: 0;
    border-radius: 8px;
    display: inline-grid;
    place-items: center;
    color: var(--text-primary);
    background: transparent;
    cursor: pointer;
    transition:
        color var(--duration-fast) var(--ease-out),
        background var(--duration-fast) var(--ease-out),
        transform var(--duration-fast) var(--ease-spring);
}

.ecs-rich-tool:hover,
.ecs-rich-tool:focus,
.ecs-rich-tool.is-active {
    color: var(--primary);
    background: rgba(var(--primary-rgb), 0.12);
    outline: none;
    transform: scale(1.06);
}

.ecs-rich-select {
    min-width: 96px;
    height: 30px;
    padding: 0 1.75rem 0 0.45rem;
    border-radius: 6px;
    border: 1px solid var(--border-color);
    background-color: var(--card-bg);
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%2394a3b8' stroke-width='2.5' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 0.45rem center;
    background-size: 0.75rem;
    appearance: none;
    -webkit-appearance: none;
    font-size: 0.72rem;
    cursor: pointer;
}

.ecs-rich-color {
    width: 30px;
    height: 30px;
    border-radius: 6px;
    display: inline-grid;
    place-items: center;
    position: relative;
    cursor: pointer;
}

.ecs-rich-color input {
    position: absolute;
    inset: 0;
    opacity: 0;
    cursor: pointer;
}

.ecs-rich-surface {
    min-height: 220px;
    padding: 0.75rem 0.85rem;
    outline: none;
    font-size: 0.88rem;
    line-height: 1.5;
    background: var(--editor-bg);
    color: var(--editor-text);
}

.ecs-rich-surface:empty::before {
    content: attr(data-placeholder);
    color: var(--text-muted);
}

.ecs-rich-surface a { color: var(--primary); }
.ecs-rich-surface img { max-width: 100%; height: auto; border-radius: 8px; }

.ecs-rich-surface table {
    width: 100%;
    border-collapse: collapse;
    margin: 0.75rem 0;
}

.ecs-rich-surface td,
.ecs-rich-surface th {
    border: 1px solid var(--border-color);
    padding: 0.55rem;
}

.ecs-rich-surface blockquote {
    margin: 0.75rem 0;
    padding: 0.65rem 0.85rem;
    border-left: 3px solid var(--primary);
    background: rgba(var(--primary-rgb), 0.1);
}

.ecs-rich-source {
    width: 100%;
    min-height: 220px;
    padding: 0.65rem;
    border: 0;
    background: var(--code-bg);
    color: var(--code-text);
    font-family: Consolas, Monaco, monospace;
    font-size: 0.82rem;
    line-height: 1.6;
    resize: vertical;
}

/* Preview panel */
.email-preview {
    background: var(--preview-bg);
    color: var(--preview-text);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    padding: 1rem;
    max-height: 280px;
    overflow: auto;
}

.email-preview-shell {
    margin-top: 1rem;
    padding: 1rem;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    background: var(--card-bg);
}

.email-preview-toolbar {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 1rem;
    margin-bottom: 1rem;
}

.email-preview-title {
    margin: 0 0 0.25rem;
    font-size: 1.05rem;
}

.email-preview-meta {
    display: grid;
    gap: 0.55rem;
    margin-bottom: 1rem;
    padding: 0.85rem 1rem;
    border-radius: var(--radius-sm);
    background: var(--hover-bg);
    border: 1px solid var(--border-color);
}

.email-preview-meta-row {
    display: grid;
    grid-template-columns: 120px 1fr;
    gap: 0.75rem;
    align-items: start;
    font-size: 0.88rem;
}

.email-preview-meta-label {
    color: var(--text-secondary);
    font-weight: 600;
}

.email-preview-subject,
.email-preview-recipient {
    color: var(--text-primary);
    word-break: break-word;
}

.email-preview-samples {
    margin-bottom: 1rem;
}

.email-preview-frame-wrap {
    position: relative;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    overflow: visible;
    background: #f0f0f0;
    min-height: 0;
    isolation: isolate;
}

.email-preview-frame-wrap--modal {
    min-height: 0;
}

.email-preview-frame {
    display: block;
    width: 100%;
    min-height: 280px;
    height: auto;
    border: 0;
    background: #fff;
    position: relative;
    z-index: 1;
    overflow: hidden;
}

.email-preview-loading,
.email-preview-error {
    position: absolute;
    inset: 0;
    z-index: 2;
    display: none;
    align-items: center;
    justify-content: center;
    padding: 1rem;
    text-align: center;
}

.email-preview-loading.is-visible,
.email-preview-error.is-visible {
    display: flex;
}

.email-preview-loading[hidden],
.email-preview-error[hidden] {
    display: none !important;
}

.email-preview-loading {
    background: #f0f0f0;
    color: var(--text-secondary);
    gap: 0.5rem;
}

.email-preview-error {
    background: #fef2f2;
    color: #b91c1c;
}

.email-preview-modal {
    position: fixed;
    inset: 0;
    z-index: 2000;
    display: grid;
    place-items: center;
    padding: 1rem;
    opacity: 0;
    visibility: hidden;
    transition:
        opacity var(--duration-base) var(--ease-out),
        visibility var(--duration-base) var(--ease-out);
}

.email-preview-modal.is-visible {
    opacity: 1;
    visibility: visible;
}

.email-preview-modal[hidden] {
    display: none !important;
}

.email-preview-modal-backdrop {
    position: absolute;
    inset: 0;
    background: rgba(15, 23, 42, 0.55);
    backdrop-filter: blur(6px);
    -webkit-backdrop-filter: blur(6px);
}

.email-preview-modal-dialog {
    position: relative;
    width: min(960px, 100%);
    max-height: calc(100vh - 2rem);
    max-height: calc(100dvh - 2rem);
    overflow-x: hidden;
    overflow-y: auto;
    -webkit-overflow-scrolling: touch;
    overscroll-behavior: contain;
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    padding: 1.25rem;
    transform: scale(0.94) translateY(12px);
    opacity: 0;
    transition:
        transform var(--duration-slow) var(--ease-spring),
        opacity var(--duration-base) var(--ease-out);
}

.email-preview-modal.is-visible .email-preview-modal-dialog {
    transform: scale(1) translateY(0);
    opacity: 1;
}

.email-preview-modal-dialog .email-preview-samples {
    margin-bottom: 1rem;
}

.email-preview-modal-dialog .email-preview-samples[hidden] {
    display: none;
}

.email-preview-modal-head {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 1rem;
    margin-bottom: 1rem;
}

.email-preview-modal-head h2 {
    margin: 0 0 0.25rem;
    font-size: 1.15rem;
}

body.email-preview-modal-open {
    overflow: hidden;
}

@media (max-width: 768px) {
    .email-preview-meta-row {
        grid-template-columns: 1fr;
        gap: 0.25rem;
    }

    .email-preview-frame,
    .email-preview-frame-wrap {
        min-height: 0;
    }

    .email-preview-modal {
        padding: 0.5rem;
    }

    .email-preview-modal-dialog {
        padding: 0.85rem;
        max-height: calc(100vh - 1rem);
    }
}

.code-block {
    background: var(--code-bg);
    color: var(--code-text);
    padding: 12px;
    border-radius: var(--radius-sm);
    overflow: auto;
    font-size: 0.82rem;
    border: 1px solid var(--border-color);
}

.log-list {
    max-height: 260px;
    overflow: auto;
    font-size: 0.8rem;
}

.log-item {
    padding: 0.4rem 0;
    border-bottom: 1px solid var(--border-color);
}

.muted { color: var(--text-secondary); }
.small { font-size: 0.75rem; }

/* List picker */
.list-picker-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
    gap: var(--space-gap);
}

.list-picker-card {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 0.75rem;
    box-shadow: var(--shadow-sm);
    transition:
        transform var(--duration-base) var(--ease-spring),
        box-shadow var(--duration-base) var(--ease-out),
        border-color var(--duration-base) var(--ease-out);
}

.list-picker-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

/* Recipient list management */
.ecs-recipient-toolbar-row {
    display: grid;
    grid-template-columns: 1fr minmax(160px, 220px) auto;
    gap: var(--space-gap);
    align-items: end;
}

.ecs-recipient-toolbar-actions {
    margin: 0;
    padding: 0;
    border: 0;
}

.ecs-recipient-table-head {
    display: flex;
    align-items: baseline;
    justify-content: space-between;
    gap: 0.75rem;
}

.ecs-recipient-bulk-bar {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    gap: 0.75rem;
    margin-bottom: 0.75rem;
    padding: 0.65rem 0.75rem;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    background: var(--surface-elevated, var(--card-bg));
}

.ecs-recipient-bulk-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.ecs-recipient-row-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 0.35rem;
}

.ecs-recipient-table .col-check {
    width: 2.5rem;
}

.ecs-recipient-danger-zone {
    margin-top: 1rem;
    padding-top: 1rem;
    border-top: 1px solid var(--border-color);
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    gap: 0.75rem;
}

.ecs-modal {
    border: none;
    padding: 0;
    background: transparent;
    max-width: min(520px, calc(100vw - 2rem));
}

.ecs-modal::backdrop {
    background: rgba(15, 23, 42, 0.55);
}

.ecs-modal-card {
    margin: 0;
    padding: 1.25rem;
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-color);
    background: var(--card-bg);
    box-shadow: var(--shadow-lg);
}

.ecs-modal-head {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 0.75rem;
    margin-bottom: 1rem;
}

.ecs-modal-head h2 {
    margin: 0;
    font-size: 1.1rem;
}

.ecs-modal-close {
    border: none;
    background: transparent;
    color: var(--text-secondary);
    font-size: 1.5rem;
    line-height: 1;
    cursor: pointer;
    padding: 0.15rem 0.35rem;
}

@media (max-width: 768px) {
    .ecs-recipient-toolbar-row {
        grid-template-columns: 1fr;
    }

    .ecs-recipient-bulk-bar {
        align-items: stretch;
    }

    .ecs-recipient-bulk-actions {
        width: 100%;
    }

    .ecs-recipient-bulk-actions .btn {
        flex: 1 1 auto;
    }
}

.list-picker-option {
    cursor: pointer;
    display: flex;
    flex-direction: column;
    gap: 0.2rem;
    transition:
        border-color var(--duration-base) var(--ease-out),
        box-shadow var(--duration-base) var(--ease-out),
        transform var(--duration-fast) var(--ease-spring);
}

.list-picker-option input {
    position: absolute;
    opacity: 0;
    pointer-events: none;
}

.list-picker-option:has(input:checked) {
    border-color: var(--primary);
    box-shadow: 0 0 0 4px rgba(var(--primary-rgb), 0.12);
    transform: scale(1.01);
}

.list-picker-head {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    flex-wrap: wrap;
}

/* Modern file upload */
.ecs-upload-form .ecs-upload-actions {
    margin-top: 1rem;
    padding-top: 0;
    border-top: 0;
}

.ecs-file-upload {
    display: grid;
    gap: 0.75rem;
}

.ecs-file-upload-zone {
    position: relative;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 0.35rem;
    min-height: 168px;
    padding: 1.25rem 1rem;
    border: 1.5px dashed var(--border-color);
    border-radius: var(--radius-lg);
    background: linear-gradient(180deg, rgba(var(--primary-rgb), 0.04), transparent 70%);
    text-align: center;
    cursor: pointer;
    transition:
        border-color var(--duration-base) var(--ease-out),
        background var(--duration-base) var(--ease-out),
        box-shadow var(--duration-base) var(--ease-out),
        transform var(--duration-base) var(--ease-spring);
}

.ecs-file-upload-zone:hover,
.ecs-file-upload-zone.is-dragover {
    border-color: rgba(var(--primary-rgb), 0.55);
    background: rgba(var(--primary-rgb), 0.08);
    box-shadow: 0 0 0 4px rgba(var(--primary-rgb), 0.1);
    transform: translateY(-2px);
}

.ecs-file-upload-zone.is-selected {
    border-color: rgba(var(--primary-rgb), 0.45);
    background: rgba(var(--primary-rgb), 0.06);
}

.ecs-file-upload-input {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    opacity: 0;
    cursor: pointer;
}

.ecs-file-upload-icon {
    width: 52px;
    height: 52px;
    border-radius: 14px;
    display: grid;
    place-items: center;
    background: rgba(var(--primary-rgb), 0.12);
    color: var(--primary);
    font-size: 1.35rem;
    margin-bottom: 0.15rem;
}

.ecs-file-upload-title {
    font-size: 0.95rem;
    font-weight: 700;
    color: var(--text-primary);
}

.ecs-file-upload-sub {
    font-size: 0.78rem;
    color: var(--text-secondary);
    max-width: 28rem;
}

.ecs-file-upload-meta {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 0.75rem;
    padding: 0.65rem 0.75rem;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    background: var(--hover-bg);
}

.ecs-file-upload-meta[hidden] {
    display: none !important;
}

.ecs-file-upload-file {
    display: flex;
    align-items: center;
    gap: 0.65rem;
    min-width: 0;
}

.ecs-file-upload-file-icon {
    width: 36px;
    height: 36px;
    border-radius: 10px;
    display: grid;
    place-items: center;
    background: rgba(var(--primary-rgb), 0.12);
    color: var(--primary);
    flex-shrink: 0;
}

.ecs-file-upload-file-text {
    display: flex;
    flex-direction: column;
    gap: 0.1rem;
    min-width: 0;
    text-align: left;
}

.ecs-file-upload-file-text strong {
    font-size: 0.84rem;
    word-break: break-all;
}

/* SMTP test & sender cards */
.card-nested {
    box-shadow: none;
    border: 1px solid var(--border-color);
    margin-bottom: var(--space-gap);
}

.form-actions.is-flush {
    margin-top: 0;
    padding-top: 0;
    border-top: 0;
}

.form-actions.is-compact-top {
    margin-top: var(--space-gap);
    padding-top: 0;
    border-top: 0;
}

.smtp-test-panel {
    margin-top: 0.65rem;
    margin-bottom: 0.75rem;
    padding-bottom: 0.85rem;
    background: var(--hover-bg);
    box-shadow: none;
    overflow: visible;
}

.smtp-test-panel .card-sub {
    margin-bottom: 0.75rem;
}

.smtp-test-panel .form-group {
    margin-bottom: 1rem;
}

.form-actions.smtp-test-actions {
    margin-top: 0;
    padding-top: 0;
    padding-bottom: 0.25rem;
    border-top: 0;
    gap: 0.75rem;
}

.smtp-test-result {
    margin-top: 0.85rem;
    margin-bottom: 0;
}

.sender-list {
    display: flex;
    flex-direction: column;
    gap: var(--space-gap);
}

.sender-card {
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 0.85rem;
    background: var(--card-bg);
    transition:
        transform var(--duration-base) var(--ease-spring),
        box-shadow var(--duration-base) var(--ease-out),
        border-color var(--duration-base) var(--ease-out);
}

.sender-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
    border-color: rgba(var(--primary-rgb), 0.12);
}

.sender-card-head {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: 0.5rem;
    margin-bottom: 0.2rem;
}

.sender-delete-form {
    margin-top: 0.5rem;
    padding-top: 0.5rem;
    border-top: 1px solid var(--border-color);
}

/* Login */
body.auth-page {
    min-height: 100vh;
    min-height: 100dvh;
    display: grid;
    place-items: center;
    padding: 1.25rem;
    width: 100%;
    max-width: 100%;
    overflow-x: hidden;
    background:
        radial-gradient(circle at 20% 20%, rgba(59, 130, 246, 0.35), transparent 40%),
        radial-gradient(circle at 80% 80%, rgba(99, 102, 241, 0.2), transparent 45%),
        linear-gradient(135deg, #0b1220 0%, #141c2e 50%, #1d4ed8 100%);
    background-attachment: scroll;
}

.auth-card {
    width: min(420px, 100%);
    max-width: 100%;
    background: var(--card-bg);
    color: var(--text-primary);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: var(--radius-xl);
    padding: 1.65rem;
    box-shadow: 0 24px 60px rgba(15, 23, 42, 0.35);
    animation: ecs-scale-in var(--duration-slow) var(--ease-spring);
    backdrop-filter: blur(12px);
}

[data-theme="dark"] .auth-card {
    border-color: var(--border-color);
    box-shadow: 0 24px 60px rgba(0, 0, 0, 0.45);
}

.auth-card .alert {
    margin-bottom: 0.85rem;
}

.theme-toggle {
    width: 38px;
    height: 38px;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    background: var(--card-bg);
    color: var(--text-primary);
    cursor: pointer;
    display: inline-grid;
    place-items: center;
    transition:
        background var(--duration-base) var(--ease-out),
        color var(--duration-base) var(--ease-out),
        border-color var(--duration-base) var(--ease-out),
        transform var(--duration-base) var(--ease-spring),
        box-shadow var(--duration-base) var(--ease-out);
}

.theme-toggle:hover {
    background: rgba(var(--primary-rgb), 0.08);
    color: var(--primary);
    border-color: rgba(var(--primary-rgb), 0.2);
    transform: rotate(-8deg) scale(1.05);
    box-shadow: var(--shadow-sm);
}

.theme-toggle i {
    transition: transform var(--duration-base) var(--ease-spring);
}

.theme-toggle:active i {
    transform: rotate(180deg);
}

.auth-theme-toggle {
    position: fixed;
    top: 1rem;
    right: 1rem;
    z-index: 10;
    background: rgba(255, 255, 255, 0.92);
    border-color: rgba(255, 255, 255, 0.35);
}

[data-theme="dark"] .auth-theme-toggle {
    background: var(--card-bg);
    border-color: var(--border-color);
}

.auth-brand {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 1rem;
}

.auth-brand-icon {
    width: 44px;
    height: 44px;
    border-radius: 12px;
    display: grid;
    place-items: center;
    background: rgba(var(--primary-rgb), 0.12);
    color: var(--primary);
    font-size: 1.1rem;
    flex-shrink: 0;
}

.auth-card h1 {
    margin: 0;
    font-size: 1.2rem;
    font-weight: 800;
    line-height: 1.2;
}

.auth-card .subtitle {
    margin: 0.2rem 0 0;
    color: var(--text-secondary);
    font-size: 0.82rem;
}

.auth-form {
    display: flex;
    flex-direction: column;
    gap: 0.85rem;
    margin-top: 0.25rem;
}

.auth-form .form-group {
    margin-bottom: 0;
}

.auth-form input[type="text"],
.auth-form input[type="password"] {
    padding: 0.62rem 0.75rem;
}

.auth-form input:focus {
    border-color: rgba(var(--primary-rgb), 0.45);
    box-shadow: 0 0 0 3px rgba(var(--primary-rgb), 0.08);
}

.auth-form-actions {
    margin-top: 0.35rem;
    padding-top: 0.15rem;
}

.btn-auth-submit {
    width: 100%;
    padding: 0.62rem 1rem;
    font-size: 0.92rem;
}

.auth-footnote {
    margin: 1rem 0 0;
    text-align: center;
    color: var(--text-secondary);
    font-size: 0.78rem;
}

.quick-steps {
    margin: 0;
    padding-left: 1.15rem;
    color: var(--text-secondary);
}

.quick-steps li { margin-bottom: 0.45rem; }

/* Responsive */
@media (max-width: 1199.98px) {
    .header-user-name { display: none; }
}

@media (max-width: 991.98px) {
    .sidebar {
        transform: translateX(-100%);
    }

    .sidebar.show {
        transform: translateX(0);
        visibility: visible;
        pointer-events: auto;
    }

    .sidebar:not(.show) {
        visibility: hidden;
        pointer-events: none;
    }

    .sidebar-close { display: inline-grid; place-items: center; }
    .sidebar-toggle { display: inline-grid; place-items: center; }

    .main-content {
        margin-left: 0;
        width: 100%;
        max-width: 100%;
    }

    .stats-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }

    .stats-grid--send {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
}

@media (max-width: 767.98px) {
    :root {
        --space-safe-bottom: calc(8rem + max(env(safe-area-inset-bottom, 0px), 40px));
    }

    html {
        overflow-x: visible;
    }

    body:not(.auth-page) {
        min-height: auto;
        overflow-x: clip;
    }

    .page-body {
        padding: 0.75rem;
        padding-bottom: var(--space-safe-bottom);
    }

    .main-content {
        padding-bottom: calc(1rem + env(safe-area-inset-bottom, 24px));
    }

    .ecs-tab-panel {
        padding-bottom: calc(var(--space-card) + 2rem + env(safe-area-inset-bottom, 16px));
    }

    .ecs-panel-shell {
        margin-bottom: 0.5rem;
    }

    .card,
    .card-nested {
        overflow: visible;
    }

    .smtp-test-panel {
        margin-bottom: 1.5rem;
        padding-bottom: 1.5rem;
    }

    .form-actions.smtp-test-actions {
        gap: 0.85rem;
        padding-bottom: 0.75rem;
        margin-bottom: 0.5rem;
    }

    .form-actions.smtp-test-actions .btn {
        width: 100%;
    }

    #senderForm > .form-actions:last-child {
        margin-bottom: 1rem;
        padding-bottom: 1rem;
    }
    .main-header {
        display: grid;
        grid-template-columns: auto 1fr auto;
        gap: 0.45rem 0.65rem;
        align-items: center;
        padding: 0.55rem 0.75rem;
    }

    .header-left {
        display: contents;
    }

    .header-right {
        display: contents;
    }

    .sidebar-toggle {
        grid-column: 1;
        grid-row: 1;
    }

    .header-title {
        grid-column: 2;
        grid-row: 1;
        min-width: 0;
    }

    .header-title h1 {
        font-size: 1rem;
        overflow-wrap: anywhere;
    }

    .header-title p {
        font-size: 0.72rem;
        overflow-wrap: anywhere;
    }

    .theme-toggle {
        grid-column: 3;
        grid-row: 1;
    }

    .header-user-name {
        grid-column: 3;
        grid-row: 1;
    }

    .header-actions {
        grid-column: 1 / -1;
        grid-row: 2;
        display: flex;
        flex-wrap: wrap;
        gap: 0.5rem;
        width: 100%;
    }

    .header-actions .btn {
        flex: 1 1 auto;
        min-width: 0;
    }

    .stats-grid { grid-template-columns: 1fr; }

    .stats-grid--send {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
    .card { padding: 0.75rem; }
    .card-head {
        flex-direction: column;
        align-items: stretch;
    }

    .form-grid { grid-template-columns: 1fr; }

    .form-actions {
        flex-direction: column;
        align-items: stretch;
        margin-bottom: 0.25rem;
    }

    .form-actions .btn {
        width: 100%;
    }

    .form-actions.smtp-test-actions {
        flex-direction: column;
        align-items: stretch;
    }

    .ecs-wizard-steps {
        grid-template-columns: 1fr;
    }

    .ecs-wizard-actions {
        flex-direction: column;
        align-items: stretch;
    }

    .ecs-wizard-actions .actions-right {
        margin-left: 0;
        width: 100%;
        flex-direction: column;
    }

    .ecs-wizard-actions .actions-right .btn {
        width: 100%;
    }

    .ecs-tab-nav {
        overflow-x: auto;
        flex-wrap: nowrap;
        -webkit-overflow-scrolling: touch;
        scrollbar-width: none;
        margin: 0.5rem 0.5rem 0;
    }

    .ecs-tab-nav::-webkit-scrollbar {
        display: none;
    }

    .ecs-tab-btn {
        white-space: nowrap;
        flex-shrink: 0;
    }

    .ecs-file-upload-meta {
        flex-direction: column;
        align-items: stretch;
    }

    .ecs-file-upload-meta .btn {
        width: 100%;
    }

    .email-preview-toolbar {
        flex-direction: column;
        align-items: stretch;
    }

    .table-wrap {
        border: 0;
        border-radius: 0;
        overflow-x: visible;
    }

    .table-wrap table thead { display: none; }
    .table-wrap table tbody tr {
        display: block;
        margin-bottom: 0.85rem;
        border: 1px solid var(--border-color);
        border-radius: var(--radius-sm);
        padding: 0.35rem 0;
        background: var(--card-bg);
    }
    .table-wrap table tbody td {
        display: flex;
        justify-content: space-between;
        gap: 1rem;
        border: 0;
        padding: 0.55rem 0.85rem;
    }
    .table-wrap table tbody td::before {
        content: attr(data-label);
        font-weight: 700;
        color: var(--text-secondary);
        font-size: 0.75rem;
        text-transform: uppercase;
        flex-shrink: 0;
    }
    .table-wrap table tbody td:last-child {
        justify-content: flex-end;
    }

    .card:hover,
    .stat-card:hover,
    .sender-card:hover,
    .list-picker-card:hover,
    .ecs-panel-shell:hover {
        transform: none;
        box-shadow: var(--shadow-sm);
    }

    input:focus,
    select:focus,
    textarea:focus {
        transform: none;
    }
}

@media (max-width: 575.98px) {
    .header-title p { display: none; }

    .ecs-rich-toolbar { gap: 0.35rem; }
    .ecs-rich-group { border-right: 0; padding-right: 0; }

    .auth-card {
        padding: 1.25rem;
        border-radius: var(--radius-lg);
    }

    .auth-card h1 {
        font-size: 1.05rem;
    }
}

@media (hover: none) {
    .card:hover,
    .stat-card:hover,
    .sender-card:hover,
    .list-picker-card:hover,
    .btn:hover,
    .sidebar-menu a:hover,
    .ecs-file-upload-zone:hover {
        transform: none;
    }
}

/* Tabs & wizard */
.ecs-panel-shell {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    overflow: visible;
    transition: box-shadow var(--duration-base) var(--ease-out);
}

.ecs-panel-shell:hover {
    box-shadow: var(--shadow-md);
}

.ecs-tab-nav {
    display: flex;
    flex-wrap: wrap;
    gap: 0.35rem;
    padding: 0.5rem;
    margin: 0.65rem 0.65rem 0;
    border: 0;
    border-radius: var(--radius-md);
    background: var(--hover-bg);
}

.ecs-tab-btn {
    appearance: none;
    border: 0;
    background: transparent;
    color: var(--text-secondary);
    font: inherit;
    font-size: 0.82rem;
    font-weight: 600;
    padding: 0.5rem 0.85rem;
    border-radius: var(--radius-sm);
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    transition:
        background var(--duration-base) var(--ease-out),
        color var(--duration-base) var(--ease-out),
        box-shadow var(--duration-base) var(--ease-out),
        transform var(--duration-fast) var(--ease-spring);
}

.ecs-tab-btn:hover {
    color: var(--text-primary);
    background: rgba(var(--primary-rgb), 0.06);
    transform: translateY(-1px);
}

.ecs-tab-btn.is-active {
    color: var(--primary);
    background: var(--card-bg);
    box-shadow: var(--shadow-sm);
}

.ecs-tab-panel {
    padding: var(--space-card);
}

.ecs-tab-panel.is-active {
    animation: ecs-fade-up var(--duration-base) var(--ease-out);
}

.ecs-tab-panel[hidden] {
    display: none !important;
}

.ecs-wizard-steps {
    list-style: none;
    margin: 0 0 0.85rem;
    padding: 0;
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 0.5rem;
}

.ecs-wizard-step-indicator {
    appearance: none;
    width: 100%;
    text-align: left;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.58rem 0.75rem;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    background: var(--hover-bg);
    color: var(--text-secondary);
    font-size: 0.78rem;
    font-weight: 600;
    cursor: pointer;
    transition:
        border-color var(--duration-base) var(--ease-out),
        background var(--duration-base) var(--ease-out),
        color var(--duration-base) var(--ease-out),
        transform var(--duration-fast) var(--ease-spring),
        box-shadow var(--duration-base) var(--ease-out);
}

.ecs-wizard-step-indicator:hover {
    transform: translateY(-1px);
    border-color: rgba(var(--primary-rgb), 0.2);
}

.ecs-wizard-step-indicator .step-num {
    width: 1.5rem;
    height: 1.5rem;
    border-radius: 999px;
    display: grid;
    place-items: center;
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    font-size: 0.68rem;
    flex-shrink: 0;
    transition:
        background var(--duration-base) var(--ease-out),
        border-color var(--duration-base) var(--ease-out),
        color var(--duration-base) var(--ease-out),
        transform var(--duration-base) var(--ease-spring);
}

.ecs-wizard-step-indicator.is-active {
    border-color: rgba(var(--primary-rgb), 0.35);
    background: rgba(var(--primary-rgb), 0.08);
    color: var(--primary);
    box-shadow: 0 0 0 3px rgba(var(--primary-rgb), 0.08);
}

.ecs-wizard-step-indicator.is-active .step-num {
    background: linear-gradient(135deg, var(--primary), #1d4ed8);
    border-color: var(--primary);
    color: #fff;
    transform: scale(1.08);
}

.ecs-wizard-step-indicator.is-complete {
    color: var(--text-primary);
}

.ecs-wizard-step-indicator.is-complete .step-num {
    background: linear-gradient(135deg, var(--success), #059669);
    border-color: var(--success);
    color: #fff;
}

.ecs-wizard-body {
    min-height: 120px;
}

[data-ecs-step].is-active {
    animation: ecs-fade-up var(--duration-base) var(--ease-out);
}

.ecs-wizard-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    justify-content: space-between;
    align-items: center;
    margin-top: 0.65rem;
    padding-top: 0.65rem;
    border-top: 1px solid var(--border-color);
}

.ecs-wizard-actions .actions-right {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-left: auto;
}

.ecs-section-intro {
    margin: 0 0 0.65rem;
    color: var(--text-secondary);
    font-size: 0.8rem;
}

.ecs-compact-list {
    display: grid;
    gap: var(--space-gap);
}

@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }

    .progress-bar {
        animation: none;
    }
}