@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&display=swap');

*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }

:root {
    --primary: #1b72e8;
    --primary-hover: #1557b0;
    --primary-surface: #d3e3fd;
    --primary-container: #c2e7ff;
    --primary-text: #041e49;
    --bg: #f2f6fc;
    --surface: #ffffff;
    --surface-dim: #f6f8fc;
    --surface-container: #eef1f6;
    --surface-container-high: #e3e7ec;
    --outline: #c4c7c5;
    --outline-variant: #e1e3e1;
    --on-surface: #1f1f1f;
    --on-surface-variant: #444746;
    --on-surface-muted: #70757a;
    --error: #b3261e;
    --error-surface: #f9dedc;
    --success: #137333;
    --success-surface: #e6f4ea;
    --star-active: #f4b400;
    --star-inactive: #c4c7c5;
    --shadow-1: 0 1px 2px rgba(0,0,0,0.06), 0 1px 3px rgba(0,0,0,0.1);
    --shadow-2: 0 1px 3px rgba(0,0,0,0.08), 0 4px 8px rgba(0,0,0,0.06);
    --shadow-3: 0 4px 8px rgba(0,0,0,0.08), 0 8px 16px rgba(0,0,0,0.06);
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    --radius-full: 9999px;
    --transition: 200ms cubic-bezier(0.2, 0, 0, 1);
}

html { font-size: 14px; }

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: var(--bg);
    color: var(--on-surface);
    min-height: 100vh;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    line-height: 1.5;
}

a { color: var(--primary); text-decoration: none; }
button { font-family: inherit; }

/* ═══════════════════════════════════════════
   LOGIN
   ═══════════════════════════════════════════ */
.login-page {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 1.5rem;
    background: linear-gradient(135deg, var(--bg) 0%, #e8edf5 100%);
}

.login-card {
    background: var(--surface);
    border-radius: var(--radius-lg);
    padding: 3rem 2.5rem;
    width: 100%;
    max-width: 380px;
    box-shadow: var(--shadow-2);
}

.login-logo {
    width: 56px;
    height: 56px;
    background: var(--primary);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1.5rem;
}

.login-logo svg { width: 28px; height: 28px; fill: white; }

.login-card h1 {
    text-align: center;
    font-size: 1.7rem;
    font-weight: 700;
    letter-spacing: -0.02em;
    margin-bottom: 0.25rem;
}

.login-card .subtitle {
    text-align: center;
    color: var(--on-surface-muted);
    font-size: 0.93rem;
    margin-bottom: 2rem;
}

.login-card input[type="password"] {
    width: 100%;
    padding: 0.85rem 1rem;
    background: var(--surface);
    border: 1.5px solid var(--outline);
    border-radius: var(--radius-sm);
    color: var(--on-surface);
    font-size: 1rem;
    margin-bottom: 1.25rem;
    transition: border-color var(--transition), box-shadow var(--transition);
}

.login-card input[type="password"]:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(27, 114, 232, 0.12);
}

.login-card input[type="password"]::placeholder { color: var(--on-surface-muted); }

.login-card button[type="submit"] {
    width: 100%;
    padding: 0.85rem;
    background: var(--primary);
    color: white;
    border: none;
    border-radius: var(--radius-full);
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition);
    letter-spacing: 0.01em;
}

.login-card button[type="submit"]:hover {
    background: var(--primary-hover);
    box-shadow: var(--shadow-1);
}

.login-card button[type="submit"]:active {
    transform: scale(0.98);
}

.error {
    background: var(--error-surface);
    color: var(--error);
    padding: 0.75rem 1rem;
    border-radius: var(--radius-sm);
    margin-bottom: 1rem;
    font-size: 0.9rem;
    text-align: center;
    font-weight: 500;
}

/* ═══════════════════════════════════════════
   APP LAYOUT
   ═══════════════════════════════════════════ */
.app-layout {
    display: flex;
    min-height: 100vh;
}

/* ═══════════════════════════════════════════
   SIDEBAR
   ═══════════════════════════════════════════ */
.sidebar {
    width: 260px;
    min-width: 260px;
    background: var(--surface-dim);
    display: flex;
    flex-direction: column;
    padding: 0.75rem 0.75rem 1rem;
    overflow-y: auto;
}

.sidebar-brand {
    display: flex;
    align-items: center;
    gap: 0.6rem;
    padding: 0.5rem 0.75rem 1rem;
}

.sidebar-brand-icon {
    width: 36px;
    height: 36px;
    background: var(--primary);
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.sidebar-brand-icon svg { width: 18px; height: 18px; fill: white; }

.sidebar-brand h1 {
    font-size: 1.15rem;
    font-weight: 700;
    letter-spacing: -0.02em;
    color: var(--on-surface);
}

.sidebar-section {
    margin-bottom: 0.25rem;
}

.sidebar-section-title {
    font-size: 0.7rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--on-surface-muted);
    padding: 0.75rem 0.75rem 0.35rem;
}

.nav-item {
    display: flex;
    align-items: center;
    gap: 0.65rem;
    padding: 0.5rem 0.75rem;
    border-radius: var(--radius-full);
    color: var(--on-surface-variant);
    font-size: 0.9rem;
    font-weight: 500;
    transition: all var(--transition);
    position: relative;
    cursor: pointer;
}

.nav-item svg {
    width: 18px;
    height: 18px;
    fill: currentColor;
    flex-shrink: 0;
    opacity: 0.8;
}

.nav-item:hover {
    background: var(--surface-container);
    color: var(--on-surface);
}

.nav-item.active {
    background: var(--primary-surface);
    color: var(--primary-text);
    font-weight: 600;
}

.nav-item.active svg { opacity: 1; }

.nav-item .nav-badge {
    margin-left: auto;
    background: var(--primary);
    color: white;
    font-size: 0.7rem;
    font-weight: 700;
    padding: 0.1rem 0.45rem;
    border-radius: var(--radius-full);
    min-width: 18px;
    text-align: center;
    line-height: 1.4;
}

.domain-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0.4rem 0.75rem 0.4rem 2.5rem;
    border-radius: var(--radius-full);
    color: var(--on-surface-variant);
    font-size: 0.85rem;
    transition: all var(--transition);
}

.domain-item:hover {
    background: var(--surface-container);
    color: var(--on-surface);
}

.domain-item.active {
    background: var(--primary-surface);
    color: var(--primary-text);
    font-weight: 600;
}

.domain-item .badge {
    background: var(--primary);
    color: white;
    font-size: 0.65rem;
    font-weight: 700;
    padding: 0.05rem 0.4rem;
    border-radius: var(--radius-full);
    min-width: 16px;
    text-align: center;
}

.sidebar-footer {
    margin-top: auto;
    padding-top: 0.5rem;
    border-top: 1px solid var(--outline-variant);
}

/* ═══════════════════════════════════════════
   MAIN CONTENT AREA
   ═══════════════════════════════════════════ */
.main-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    min-width: 0;
    background: var(--surface);
    border-radius: var(--radius-lg);
    margin: 0.5rem 0.5rem 0.5rem 0;
    box-shadow: var(--shadow-1);
    overflow: hidden;
}

/* ═══════════════════════════════════════════
   SEARCH BAR (Google-style)
   ═══════════════════════════════════════════ */
.search-container {
    padding: 0.5rem 1rem;
    border-bottom: 1px solid var(--outline-variant);
    display: flex;
    align-items: center;
    gap: 0.75rem;
    min-height: 56px;
}

.search-box {
    flex: 1;
    max-width: 720px;
    position: relative;
    display: flex;
    align-items: center;
}

.search-box svg {
    position: absolute;
    left: 0.85rem;
    width: 18px;
    height: 18px;
    fill: var(--on-surface-muted);
    pointer-events: none;
    z-index: 1;
}

.search-box input {
    width: 100%;
    padding: 0.6rem 1rem 0.6rem 2.7rem;
    background: var(--surface-container);
    border: 1px solid transparent;
    border-radius: var(--radius-full);
    color: var(--on-surface);
    font-size: 0.93rem;
    transition: all var(--transition);
}

.search-box input::placeholder { color: var(--on-surface-muted); }

.search-box input:focus {
    outline: none;
    background: var(--surface);
    border-color: var(--primary);
    box-shadow: var(--shadow-2);
}

.search-header-title {
    font-size: 1.05rem;
    font-weight: 600;
    color: var(--on-surface);
    white-space: nowrap;
    min-width: fit-content;
}

/* ═══════════════════════════════════════════
   TOOLBAR (bulk actions / select all)
   ═══════════════════════════════════════════ */
.toolbar {
    display: flex;
    align-items: center;
    padding: 0 1rem;
    min-height: 44px;
    border-bottom: 1px solid var(--outline-variant);
    gap: 0.25rem;
    background: var(--surface);
}

.toolbar-checkbox {
    width: 18px;
    height: 18px;
    cursor: pointer;
    accent-color: var(--primary);
    margin-right: 0.5rem;
}

.toolbar-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    padding: 0.35rem 0.65rem;
    background: none;
    border: none;
    border-radius: var(--radius-sm);
    color: var(--on-surface-variant);
    font-size: 0.8rem;
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition);
    white-space: nowrap;
}

.toolbar-btn svg {
    width: 16px;
    height: 16px;
    fill: currentColor;
}

.toolbar-btn:hover {
    background: var(--surface-container);
    color: var(--on-surface);
}

.toolbar-btn.danger:hover {
    background: var(--error-surface);
    color: var(--error);
}

.toolbar-divider {
    width: 1px;
    height: 20px;
    background: var(--outline-variant);
    margin: 0 0.25rem;
}

.toolbar-count {
    font-size: 0.8rem;
    color: var(--primary);
    font-weight: 600;
    margin-left: 0.25rem;
}

.bulk-actions { display: none; }
.bulk-actions.visible { display: contents; }

/* ═══════════════════════════════════════════
   NEW MAIL BANNER
   ═══════════════════════════════════════════ */
.new-mail-banner {
    display: none;
    padding: 0.6rem 1rem;
    background: var(--primary-container);
    color: var(--primary-text);
    font-size: 0.85rem;
    font-weight: 600;
    cursor: pointer;
    text-align: center;
    transition: background var(--transition);
    border-bottom: 1px solid var(--outline-variant);
}

.new-mail-banner:hover { background: var(--primary-surface); }
.new-mail-banner.visible { display: block; }

/* ═══════════════════════════════════════════
   EMAIL LIST
   ═══════════════════════════════════════════ */
.email-list {
    flex: 1;
    overflow-y: auto;
}

.email-row {
    display: flex;
    align-items: center;
    padding: 0.35rem 1rem;
    border-bottom: 1px solid var(--outline-variant);
    transition: all 100ms ease;
    cursor: pointer;
    gap: 0;
    min-height: 48px;
    position: relative;
}

.email-row:last-child { border-bottom: none; }

.email-row:hover {
    background: var(--surface-container);
    box-shadow: inset 3px 0 0 var(--primary);
}

.email-row.unread {
    background: rgba(210, 227, 252, 0.35);
}

.email-row.unread:hover {
    background: rgba(210, 227, 252, 0.55);
}

.email-row-checkbox {
    width: 18px;
    height: 18px;
    cursor: pointer;
    accent-color: var(--primary);
    flex-shrink: 0;
    margin-right: 0.5rem;
}

.email-row-star {
    background: none;
    border: none;
    cursor: pointer;
    padding: 0.25rem;
    margin-right: 0.5rem;
    flex-shrink: 0;
    display: flex;
    align-items: center;
    transition: transform var(--transition);
}

.email-row-star:hover { transform: scale(1.2); }

.email-row-star svg {
    width: 18px;
    height: 18px;
    fill: var(--star-inactive);
    transition: fill var(--transition);
}

.email-row-star.starred svg {
    fill: var(--star-active);
}

.email-row-star:hover svg { fill: var(--star-active); }

/* Avatar */
.email-avatar {
    width: 32px;
    height: 32px;
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.85rem;
    font-weight: 600;
    color: white;
    flex-shrink: 0;
    margin-right: 0.75rem;
    letter-spacing: 0;
    user-select: none;
}

/* Email content in row */
.email-row-content {
    flex: 1;
    min-width: 0;
    display: flex;
    align-items: center;
    gap: 0;
    text-decoration: none;
    color: inherit;
}

.email-row-from {
    width: 180px;
    min-width: 180px;
    font-size: 0.9rem;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    color: var(--on-surface-variant);
    padding-right: 0.75rem;
}

.email-row.unread .email-row-from {
    color: var(--on-surface);
    font-weight: 700;
}

.email-row-body {
    flex: 1;
    min-width: 0;
    display: flex;
    align-items: baseline;
    gap: 0;
    overflow: hidden;
}

.email-row-subject {
    font-size: 0.9rem;
    color: var(--on-surface);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    flex-shrink: 1;
    min-width: 0;
}

.email-row.unread .email-row-subject {
    font-weight: 600;
}

.email-row-snippet {
    color: var(--on-surface-muted);
    font-size: 0.85rem;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    flex-shrink: 999;
    min-width: 0;
    margin-left: 0.3rem;
}

.email-row-snippet::before { content: "\00a0\2014\00a0"; }

.email-row-right {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    flex-shrink: 0;
    padding-left: 0.75rem;
}

.email-row-domain {
    font-size: 0.7rem;
    font-weight: 500;
    color: var(--on-surface-muted);
    background: var(--surface-container);
    padding: 0.12rem 0.45rem;
    border-radius: var(--radius-full);
    white-space: nowrap;
}

.email-row-time {
    font-size: 0.8rem;
    color: var(--on-surface-muted);
    white-space: nowrap;
    min-width: 55px;
    text-align: right;
}

.email-row.unread .email-row-time {
    color: var(--on-surface);
    font-weight: 600;
}

/* Hover actions (appear on hover, replace time) */
.email-row-hover-actions {
    display: none;
    gap: 0.15rem;
}

.email-row:hover .email-row-hover-actions { display: flex; }
.email-row:hover .email-row-time { display: none; }

.hover-action-btn {
    width: 30px;
    height: 30px;
    border: none;
    background: none;
    border-radius: var(--radius-full);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--on-surface-variant);
    transition: all var(--transition);
}

.hover-action-btn svg { width: 16px; height: 16px; fill: currentColor; }

.hover-action-btn:hover {
    background: var(--surface-container-high);
    color: var(--on-surface);
}

/* ═══════════════════════════════════════════
   EMAIL VIEW (reading pane)
   ═══════════════════════════════════════════ */
.email-view-topbar {
    display: flex;
    align-items: center;
    padding: 0.4rem 0.75rem;
    border-bottom: 1px solid var(--outline-variant);
    gap: 0.15rem;
    min-height: 48px;
}

.topbar-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    border: none;
    background: none;
    border-radius: var(--radius-full);
    cursor: pointer;
    color: var(--on-surface-variant);
    transition: all var(--transition);
}

.topbar-btn svg { width: 18px; height: 18px; fill: currentColor; }
.topbar-btn:hover { background: var(--surface-container); color: var(--on-surface); }

.topbar-divider-v {
    width: 1px;
    height: 24px;
    background: var(--outline-variant);
    margin: 0 0.25rem;
}

.topbar-spacer { flex: 1; }

.topbar-nav {
    display: flex;
    align-items: center;
    gap: 0.15rem;
    margin-left: auto;
}

.email-view {
    flex: 1;
    overflow-y: auto;
    padding: 1.5rem 2rem 3rem;
    max-width: 960px;
    margin: 0 auto;
    width: 100%;
}

.email-view-subject {
    display: flex;
    align-items: flex-start;
    gap: 0.5rem;
    margin-bottom: 1.25rem;
}

.email-view-subject h1 {
    font-size: 1.45rem;
    font-weight: 400;
    line-height: 1.4;
    color: var(--on-surface);
    letter-spacing: -0.01em;
}

.email-view-star {
    flex-shrink: 0;
    margin-top: 0.35rem;
}

.email-view-star .email-row-star { margin-right: 0; }
.email-view-star .email-row-star svg { width: 22px; height: 22px; }

/* Sender card */
.sender-card {
    display: flex;
    align-items: flex-start;
    gap: 0.75rem;
    margin-bottom: 1.5rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid var(--outline-variant);
}

.sender-avatar {
    width: 40px;
    height: 40px;
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1rem;
    font-weight: 600;
    color: white;
    flex-shrink: 0;
    user-select: none;
}

.sender-info { flex: 1; min-width: 0; }

.sender-name-line {
    display: flex;
    align-items: baseline;
    gap: 0.75rem;
    justify-content: space-between;
}

.sender-name {
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--on-surface);
}

.sender-email {
    font-size: 0.8rem;
    color: var(--on-surface-muted);
}

.sender-details {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem 1.5rem;
    margin-top: 0.15rem;
    font-size: 0.8rem;
    color: var(--on-surface-muted);
}

.sender-details strong { color: var(--on-surface-variant); font-weight: 500; }

.sender-time {
    font-size: 0.8rem;
    color: var(--on-surface-muted);
    white-space: nowrap;
    flex-shrink: 0;
}

/* Email body container */
.email-body-container {
    margin-bottom: 1.5rem;
}

.email-body-frame {
    width: 100%;
    min-height: 120px;
    border: none;
    border-radius: var(--radius-sm);
    background: white;
}

.email-body-text {
    font-size: 0.95rem;
    line-height: 1.7;
    color: var(--on-surface);
    white-space: pre-wrap;
    word-wrap: break-word;
    font-family: inherit;
}

/* Action bar (reply/forward) */
.email-actions-bar {
    display: flex;
    gap: 0.5rem;
    padding-top: 1rem;
    border-top: 1px solid var(--outline-variant);
    margin-top: 1rem;
}

.btn-reply {
    background: var(--primary);
    color: white;
    border-color: var(--primary);
}

.btn-reply:hover {
    background: var(--primary-hover);
    color: white;
    border-color: var(--primary-hover);
}

.btn-reply svg { fill: white; }

/* Reply/forward compose */
.reply-compose {
    margin-top: 1.25rem;
    border: 1px solid var(--outline);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-1);
    background: var(--surface);
}

.reply-compose-header {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.85rem 1rem;
    background: var(--surface-dim);
    border-bottom: 1px solid var(--outline-variant);
}

.reply-compose-avatar {
    width: 32px;
    height: 32px;
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.85rem;
    font-weight: 600;
    color: white;
    flex-shrink: 0;
}

.reply-compose-meta {
    flex: 1;
    min-width: 0;
}

.reply-compose-type {
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--on-surface-muted);
    text-transform: uppercase;
    letter-spacing: 0.04em;
}

.reply-compose-field {
    display: flex;
    align-items: center;
    gap: 0.4rem;
    margin-top: 0.15rem;
}

.reply-compose-field label {
    font-size: 0.85rem;
    color: var(--on-surface-muted);
    flex-shrink: 0;
    min-width: 28px;
}

.reply-compose-field input {
    flex: 1;
    border: none;
    background: transparent;
    color: var(--on-surface);
    font-size: 0.9rem;
    font-family: inherit;
    outline: none;
    padding: 0.15rem 0;
}

.reply-compose-field select {
    flex: 1;
    border: none;
    background: transparent;
    color: var(--on-surface);
    font-size: 0.9rem;
    font-family: inherit;
    outline: none;
    padding: 0.15rem 0;
    cursor: pointer;
    -webkit-appearance: none;
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24'%3E%3Cpath fill='%2370757a' d='M7 10l5 5 5-5z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 0 center;
    padding-right: 16px;
}

.reply-compose textarea {
    width: 100%;
    min-height: 160px;
    border: none;
    padding: 1rem;
    font-size: 0.95rem;
    font-family: inherit;
    color: var(--on-surface);
    line-height: 1.6;
    resize: vertical;
    outline: none;
    background: var(--surface);
}

.reply-compose textarea::placeholder {
    color: var(--on-surface-muted);
}

.reply-compose-footer {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1rem;
    border-top: 1px solid var(--outline-variant);
    background: var(--surface-dim);
}

.btn-send {
    padding: 0.5rem 1.5rem;
}

.btn-send svg {
    width: 14px;
    height: 14px;
}

/* Attachments */
.attachments {
    margin-top: 1.5rem;
    padding-top: 1rem;
    border-top: 1px solid var(--outline-variant);
}

.attachments-title {
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--on-surface-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 0.6rem;
}

.attachment-chips {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.attachment-chip {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    padding: 0.55rem 0.85rem;
    border: 1px solid var(--outline-variant);
    border-radius: var(--radius-sm);
    font-size: 0.85rem;
    color: var(--on-surface-variant);
    text-decoration: none;
    transition: all var(--transition);
}

.attachment-chip svg { width: 16px; height: 16px; fill: var(--on-surface-muted); }

.attachment-chip:hover {
    background: var(--surface-container);
    border-color: var(--outline);
    color: var(--on-surface);
}

.attachment-chip .att-size {
    color: var(--on-surface-muted);
    font-size: 0.75rem;
}

/* ═══════════════════════════════════════════
   SETTINGS
   ═══════════════════════════════════════════ */
.settings-page {
    padding: 2rem;
    max-width: 800px;
    margin: 0 auto;
    width: 100%;
}

.settings-page h2 {
    font-size: 1.3rem;
    font-weight: 600;
    margin-bottom: 0.35rem;
    color: var(--on-surface);
    letter-spacing: -0.01em;
}

.settings-subtitle {
    font-size: 0.9rem;
    color: var(--on-surface-muted);
    margin-bottom: 1.5rem;
}

.rule-card {
    display: flex;
    align-items: center;
    padding: 0.85rem 1rem;
    background: var(--surface);
    border: 1px solid var(--outline-variant);
    border-radius: var(--radius-md);
    margin-bottom: 0.5rem;
    transition: all var(--transition);
}

.rule-card:hover {
    border-color: var(--outline);
    box-shadow: var(--shadow-1);
}

.rule-icon {
    width: 36px;
    height: 36px;
    border-radius: var(--radius-sm);
    background: var(--primary-surface);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-right: 0.75rem;
    flex-shrink: 0;
}

.rule-icon svg { width: 18px; height: 18px; fill: var(--primary); }

.rule-body {
    flex: 1;
    min-width: 0;
}

.rule-domain-tag {
    display: inline-block;
    background: var(--primary-surface);
    color: var(--primary-text);
    padding: 0.1rem 0.45rem;
    border-radius: var(--radius-full);
    font-size: 0.75rem;
    font-weight: 600;
    margin-bottom: 0.15rem;
}

.rule-description {
    font-size: 0.85rem;
    color: var(--on-surface-variant);
}

.rule-description strong { color: var(--on-surface); }

.rule-forward-to {
    color: var(--primary);
    font-weight: 500;
}

.rule-status-pill {
    font-size: 0.7rem;
    font-weight: 600;
    padding: 0.15rem 0.5rem;
    border-radius: var(--radius-full);
    margin-left: 0.75rem;
    white-space: nowrap;
}

.rule-status-pill.enabled { background: var(--success-surface); color: var(--success); }
.rule-status-pill.disabled { background: var(--surface-container); color: var(--on-surface-muted); }

.rule-delete-btn {
    background: none;
    border: none;
    width: 32px;
    height: 32px;
    border-radius: var(--radius-full);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--on-surface-muted);
    margin-left: 0.5rem;
    transition: all var(--transition);
    flex-shrink: 0;
}

.rule-delete-btn svg { width: 16px; height: 16px; fill: currentColor; }

.rule-delete-btn:hover {
    background: var(--error-surface);
    color: var(--error);
}

/* Add rule form */
.add-rule-card {
    background: var(--surface);
    border: 1px solid var(--outline-variant);
    border-radius: var(--radius-lg);
    padding: 1.5rem;
    margin-top: 1.5rem;
}

.add-rule-card h3 {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: var(--on-surface);
}

.form-row {
    display: flex;
    gap: 0.75rem;
    flex-wrap: wrap;
    align-items: flex-end;
}

.form-group {
    flex: 1;
    min-width: 140px;
}

.form-group label {
    display: block;
    font-size: 0.8rem;
    color: var(--on-surface-muted);
    margin-bottom: 0.35rem;
    font-weight: 500;
}

.form-group input,
.form-group select {
    width: 100%;
    padding: 0.55rem 0.75rem;
    background: var(--surface);
    border: 1.5px solid var(--outline);
    border-radius: var(--radius-sm);
    color: var(--on-surface);
    font-size: 0.9rem;
    transition: all var(--transition);
    font-family: inherit;
}

.form-group input:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(27, 114, 232, 0.12);
}

.form-group select { cursor: pointer; }

.btn-add {
    padding: 0.6rem 1.75rem;
    background: var(--primary);
    color: white;
    border: none;
    border-radius: var(--radius-full);
    cursor: pointer;
    font-weight: 600;
    white-space: nowrap;
    font-size: 0.9rem;
    transition: all var(--transition);
}

.btn-add:hover {
    background: var(--primary-hover);
    box-shadow: var(--shadow-1);
}

/* ═══════════════════════════════════════════
   TOAST NOTIFICATION
   ═══════════════════════════════════════════ */
.toast {
    position: fixed;
    bottom: 1.5rem;
    left: 50%;
    transform: translateX(-50%) translateY(100px);
    background: var(--on-surface);
    color: var(--surface);
    padding: 0.75rem 1.25rem;
    border-radius: var(--radius-sm);
    font-size: 0.9rem;
    font-weight: 500;
    box-shadow: var(--shadow-3);
    z-index: 1000;
    opacity: 0;
    transition: all 300ms cubic-bezier(0.2, 0, 0, 1);
    pointer-events: none;
}

.toast.visible {
    opacity: 1;
    transform: translateX(-50%) translateY(0);
    pointer-events: auto;
}

.toast a {
    color: var(--primary-container);
    font-weight: 600;
    margin-left: 1rem;
    cursor: pointer;
}

/* ═══════════════════════════════════════════
   EMPTY STATE
   ═══════════════════════════════════════════ */
.empty-state {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 4rem 2rem;
    color: var(--on-surface-muted);
    text-align: center;
}

.empty-state svg {
    width: 80px;
    height: 80px;
    fill: var(--outline);
    margin-bottom: 1rem;
    opacity: 0.5;
}

.empty-state h3 {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--on-surface-variant);
    margin-bottom: 0.25rem;
}

.empty-state p {
    font-size: 0.9rem;
}

/* ═══════════════════════════════════════════
   UTILITIES
   ═══════════════════════════════════════════ */
.inline { display: inline; }

.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    padding: 0.45rem 0.85rem;
    border: 1px solid var(--outline-variant);
    border-radius: var(--radius-sm);
    background: var(--surface);
    color: var(--on-surface-variant);
    cursor: pointer;
    font-size: 0.85rem;
    font-weight: 500;
    transition: all var(--transition);
    text-decoration: none;
}

.btn svg { width: 16px; height: 16px; fill: currentColor; }
.btn:hover { background: var(--surface-container); color: var(--on-surface); border-color: var(--outline); }

.btn-danger { color: var(--error); border-color: rgba(179,38,30,0.3); }
.btn-danger:hover { background: var(--error-surface); color: var(--error); }

.btn-primary {
    background: var(--primary);
    color: white;
    border-color: var(--primary);
}

.btn-primary:hover { background: var(--primary-hover); color: white; }

/* ═══════════════════════════════════════════
   RESPONSIVE
   ═══════════════════════════════════════════ */
@media (max-width: 900px) {
    .email-row-from { width: 120px; min-width: 120px; }
    .email-row-snippet { display: none; }
    .email-row-domain { display: none; }
}

@media (max-width: 768px) {
    .app-layout { flex-direction: column; }
    .sidebar {
        width: 100%;
        min-width: 100%;
        flex-direction: row;
        overflow-x: auto;
        padding: 0.25rem;
        border-bottom: 1px solid var(--outline-variant);
    }
    .sidebar-brand { display: none; }
    .sidebar-section-title { display: none; }
    .sidebar-footer { display: none; }
    .sidebar-section {
        display: flex;
        gap: 0.25rem;
    }
    .nav-item {
        padding: 0.4rem 0.65rem;
        white-space: nowrap;
        font-size: 0.8rem;
    }
    .nav-item svg { width: 14px; height: 14px; }
    .domain-item {
        padding: 0.35rem 0.5rem;
        font-size: 0.75rem;
    }
    .main-content {
        margin: 0;
        border-radius: 0;
        box-shadow: none;
    }
    .email-row-from { width: 80px; min-width: 80px; }
    .email-row-snippet { display: none; }
    .email-row-domain { display: none; }
    .email-avatar { width: 28px; height: 28px; font-size: 0.75rem; }
    .email-view { padding: 1rem; }
    .sender-card { flex-wrap: wrap; }
}