/* === Reset & Base === */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --bg: #080808;
    --sidebar: #0e0e0e;
    --card: #141414;
    --card-hover: #1a1a1a;
    --accent: #dc2626;
    --accent-hover: #b91c1c;
    --accent-glow: rgba(220,38,38,0.15);
    --accent-soft: rgba(220,38,38,0.08);
    --text: #f0f0f0;
    --text-muted: #999;
    --text-dim: #555;
    --border: #1e1e1e;
    --border-hover: #2a2a2a;
    --radius: 10px;
    --radius-lg: 14px;
    --shadow: 0 4px 24px rgba(0,0,0,0.4);
    --shadow-sm: 0 2px 8px rgba(0,0,0,0.3);
    --transition: 0.2s ease;
}

html {
    font-size: 15px;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.5;
    min-height: 100vh;
}

a {
    color: var(--accent);
    text-decoration: none;
    transition: color var(--transition);
}

a:hover {
    color: var(--accent-hover);
}

::selection {
    background: var(--accent);
    color: #fff;
}

::-webkit-scrollbar {
    width: 6px;
}

::-webkit-scrollbar-track {
    background: var(--bg);
}

::-webkit-scrollbar-thumb {
    background: #2a2a2a;
    border-radius: 3px;
}

::-webkit-scrollbar-thumb:hover {
    background: #3a3a3a;
}

/* === Login Page === */
.login-page {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    padding: 20px;
    background: var(--bg);
    background-image:
        radial-gradient(ellipse at 50% 0%, rgba(220,38,38,0.06) 0%, transparent 60%);
}

.login-card {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow), 0 0 80px rgba(220,38,38,0.03);
    padding: 44px 40px;
    width: 100%;
    max-width: 420px;
}

.login-logo {
    text-align: center;
    margin-bottom: 36px;
}

.login-logo svg {
    margin-bottom: 14px;
}

.login-logo h1 {
    font-size: 1.6rem;
    font-weight: 700;
    color: var(--text);
}

.login-logo h1 span {
    color: var(--accent);
}

.login-subtitle {
    font-size: 0.85rem;
    color: var(--text-dim);
    margin-top: 6px;
}

/* === Forms === */
.form-group {
    margin-bottom: 18px;
}

.form-group label {
    display: block;
    font-size: 0.82rem;
    font-weight: 500;
    color: var(--text-muted);
    margin-bottom: 6px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.form-group input {
    width: 100%;
    padding: 12px 16px;
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    color: var(--text);
    font-family: inherit;
    font-size: 0.95rem;
    transition: border-color var(--transition), box-shadow var(--transition);
}

.form-group input:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 3px var(--accent-glow);
}

.form-group input::placeholder {
    color: var(--text-dim);
}

/* === Buttons === */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 10px 20px;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    font-family: inherit;
    font-size: 0.9rem;
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition);
    color: var(--text);
    background: var(--card);
}

.btn:hover {
    background: var(--card-hover);
    border-color: var(--border-hover);
}

.btn-primary {
    background: var(--accent);
    color: #fff;
    border: none;
    font-weight: 600;
}

.btn-primary:hover {
    background: var(--accent-hover);
    color: #fff;
    box-shadow: 0 4px 16px rgba(220,38,38,0.3);
}

.btn-block {
    width: 100%;
    justify-content: center;
    margin-top: 10px;
    padding: 12px 20px;
}

.btn-sm {
    padding: 6px 14px;
    font-size: 0.8rem;
}

.btn-back {
    color: var(--text-muted);
    border: 1px solid var(--border);
    background: var(--card);
}

.btn-back:hover {
    color: var(--text);
    border-color: var(--border-hover);
    background: var(--card-hover);
}

.btn-icon {
    padding: 8px;
    border: 1px solid var(--border);
    background: var(--card);
    border-radius: var(--radius);
    color: var(--text-muted);
    cursor: pointer;
    transition: all var(--transition);
    display: inline-flex;
    align-items: center;
    justify-content: center;
}

.btn-icon:hover {
    color: var(--text);
    background: var(--card-hover);
    border-color: var(--border-hover);
}

.btn-icon.danger:hover {
    color: var(--accent);
    border-color: rgba(220,38,38,0.3);
    background: var(--accent-soft);
}

/* === Alerts === */
.alert {
    padding: 12px 16px;
    border-radius: var(--radius);
    font-size: 0.85rem;
    margin-bottom: 20px;
}

.alert-error {
    background: rgba(220,38,38,0.1);
    border: 1px solid rgba(220,38,38,0.2);
    color: #f87171;
}

.alert-success {
    background: rgba(34,197,94,0.1);
    border: 1px solid rgba(34,197,94,0.2);
    color: #4ade80;
}

/* === App Layout (Inbox) === */
.app-layout {
    display: flex;
    min-height: 100vh;
}

/* === Mobile Header === */
.mobile-header {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: 56px;
    background: var(--sidebar);
    border-bottom: 1px solid var(--border);
    align-items: center;
    padding: 0 16px;
    z-index: 100;
    gap: 12px;
    backdrop-filter: blur(12px);
}

.sidebar-toggle {
    background: none;
    border: none;
    color: var(--text);
    cursor: pointer;
    padding: 4px;
}

.mobile-title {
    flex: 1;
    font-weight: 700;
    font-size: 1rem;
}

.mobile-title span {
    color: var(--accent);
}

.mobile-logout {
    color: var(--text-muted);
}

/* === Sidebar === */
.sidebar {
    width: 260px;
    background: var(--sidebar);
    border-right: 1px solid var(--border);
    display: flex;
    flex-direction: column;
    position: fixed;
    top: 0;
    left: 0;
    bottom: 0;
    z-index: 200;
}

.sidebar-header {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 22px 20px 10px;
}

.sidebar-title {
    font-size: 1.15rem;
    font-weight: 700;
}

.sidebar-title span {
    color: var(--accent);
}

.sidebar-user {
    padding: 0 20px 18px;
    font-size: 0.78rem;
    color: var(--text-dim);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    border-bottom: 1px solid var(--border);
    margin-bottom: 8px;
}

/* === Folders === */
.folder-list {
    flex: 1;
    padding: 4px 10px;
}

.folder-item {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 12px;
    border-radius: var(--radius);
    color: var(--text-muted);
    font-size: 0.88rem;
    font-weight: 500;
    transition: all 0.15s;
    margin-bottom: 2px;
}

.folder-item:hover {
    background: rgba(255,255,255,0.04);
    color: var(--text);
}

.folder-item.active {
    background: var(--accent-soft);
    color: var(--accent);
}

.folder-icon {
    display: flex;
    flex-shrink: 0;
}

.folder-name {
    flex: 1;
}

.badge {
    background: var(--accent);
    color: #fff;
    font-size: 0.65rem;
    font-weight: 700;
    padding: 2px 8px;
    border-radius: 10px;
    min-width: 20px;
    text-align: center;
}

.sidebar-footer {
    padding: 12px 20px;
    border-top: 1px solid var(--border);
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.sidebar-footer-link {
    display: flex;
    align-items: center;
    gap: 8px;
    color: var(--text-dim);
    font-size: 0.85rem;
    padding: 8px 0;
    transition: color var(--transition);
}

.sidebar-footer-link:hover {
    color: var(--text);
}

.sidebar-footer-link.logout-link:hover {
    color: var(--accent);
}

/* === Settings Page === */
.settings-layout {
    max-width: 800px;
    margin: 0 auto;
    padding: 32px 24px;
    min-height: 100vh;
}

.settings-header {
    display: flex;
    align-items: center;
    gap: 14px;
    margin-bottom: 32px;
}

.settings-header h1 {
    font-size: 1.4rem;
    font-weight: 700;
}

.settings-section {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    margin-bottom: 20px;
    overflow: hidden;
}

.settings-section-header {
    padding: 18px 24px;
    border-bottom: 1px solid var(--border);
    display: flex;
    align-items: center;
    gap: 10px;
}

.settings-section-header h2 {
    font-size: 1rem;
    font-weight: 600;
}

.settings-section-header svg {
    color: var(--accent);
    flex-shrink: 0;
}

.settings-row {
    display: flex;
    align-items: center;
    padding: 14px 24px;
    border-bottom: 1px solid var(--border);
    gap: 16px;
}

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

.settings-label {
    width: 160px;
    flex-shrink: 0;
    font-size: 0.82rem;
    font-weight: 600;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.settings-value {
    flex: 1;
    font-size: 0.9rem;
    color: var(--text);
    font-family: 'SF Mono', 'Fira Code', 'Cascadia Code', monospace;
    word-break: break-all;
}

.settings-value.muted {
    color: var(--text-dim);
    font-family: inherit;
    font-style: italic;
}

.settings-copy {
    padding: 6px 12px;
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: 6px;
    color: var(--text-muted);
    font-size: 0.75rem;
    cursor: pointer;
    transition: all var(--transition);
    font-family: inherit;
    white-space: nowrap;
}

.settings-copy:hover {
    border-color: var(--accent);
    color: var(--accent);
}

.settings-copy.copied {
    border-color: #22c55e;
    color: #22c55e;
}

.settings-code-block {
    padding: 16px 24px;
    background: var(--bg);
    font-family: 'SF Mono', 'Fira Code', 'Cascadia Code', monospace;
    font-size: 0.8rem;
    color: var(--text-muted);
    line-height: 1.8;
    overflow-x: auto;
    white-space: pre;
    border-top: 1px solid var(--border);
}

.settings-code-block .code-comment {
    color: var(--text-dim);
}

.settings-code-block .code-key {
    color: var(--accent);
}

.settings-code-block .code-string {
    color: #4ade80;
}

/* === Collapsible Sections === */
.settings-collapsible {
    border-top: 1px solid var(--border);
}

.settings-collapsible-toggle {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 14px 24px;
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-muted);
    cursor: pointer;
    transition: color var(--transition), background var(--transition);
    list-style: none;
    user-select: none;
}

.settings-collapsible-toggle::-webkit-details-marker {
    display: none;
}

.settings-collapsible-toggle:hover {
    color: var(--text);
    background: rgba(255,255,255,0.02);
}

.settings-collapsible-toggle svg {
    transition: transform 0.2s ease;
    flex-shrink: 0;
}

.settings-collapsible[open] > .settings-collapsible-toggle svg {
    transform: rotate(90deg);
}

.settings-collapsible[open] > .settings-collapsible-toggle {
    color: var(--accent);
}

.settings-note {
    padding: 14px 24px;
    font-size: 0.82rem;
    color: var(--text-dim);
    line-height: 1.6;
    border-top: 1px solid var(--border);
    background: var(--accent-soft);
}

@media (max-width: 768px) {
    .settings-layout {
        padding: 16px 12px;
    }

    .settings-row {
        flex-direction: column;
        align-items: flex-start;
        gap: 6px;
        padding: 12px 18px;
    }

    .settings-label {
        width: auto;
    }

    .settings-section-header {
        padding: 14px 18px;
    }

    .settings-code-block {
        padding: 12px 18px;
        font-size: 0.72rem;
    }
}

/* === Sidebar Overlay === */
.sidebar-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.6);
    z-index: 150;
    backdrop-filter: blur(4px);
}

/* === Main Content === */
.main-content {
    flex: 1;
    margin-left: 260px;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

/* === Toolbar === */
.toolbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 16px 24px;
    border-bottom: 1px solid var(--border);
    gap: 12px;
    background: var(--sidebar);
}

.toolbar-left {
    display: flex;
    align-items: center;
    gap: 12px;
}

.toolbar-title {
    font-size: 1.15rem;
    font-weight: 700;
    flex-shrink: 0;
}

.toolbar-actions {
    display: flex;
    align-items: center;
    gap: 6px;
}

.search-form {
    flex: 1;
    max-width: 360px;
}

.search-wrapper {
    position: relative;
}

.search-icon {
    position: absolute;
    left: 12px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-dim);
    pointer-events: none;
}

.search-wrapper input {
    width: 100%;
    padding: 9px 14px 9px 36px;
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    color: var(--text);
    font-family: inherit;
    font-size: 0.85rem;
    transition: border-color var(--transition), box-shadow var(--transition);
}

.search-wrapper input:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 3px var(--accent-glow);
}

.search-wrapper input::placeholder {
    color: var(--text-dim);
}

.search-info {
    padding: 10px 24px;
    font-size: 0.82rem;
    color: var(--text-muted);
    background: var(--card);
    border-bottom: 1px solid var(--border);
}

.search-info a {
    margin-left: 8px;
    font-weight: 500;
}

/* === Email List === */
.email-list {
    flex: 1;
}

.email-row {
    display: flex;
    align-items: center;
    padding: 14px 24px;
    border-bottom: 1px solid var(--border);
    transition: background var(--transition);
    color: var(--text-muted);
    gap: 12px;
    border-left: 3px solid transparent;
    cursor: pointer;
}

.email-row:hover {
    background: var(--card);
    color: var(--text);
}

.email-row.unread {
    color: var(--text);
    border-left-color: var(--accent);
    background: var(--accent-soft);
}

.email-row.unread:hover {
    background: rgba(220,38,38,0.12);
}

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

.email-checkbox {
    flex-shrink: 0;
}

.email-checkbox input[type="checkbox"] {
    appearance: none;
    width: 16px;
    height: 16px;
    border: 1.5px solid var(--text-dim);
    border-radius: 4px;
    background: transparent;
    cursor: pointer;
    transition: all var(--transition);
    position: relative;
}

.email-checkbox input[type="checkbox"]:checked {
    background: var(--accent);
    border-color: var(--accent);
}

.email-checkbox input[type="checkbox"]:checked::after {
    content: '';
    position: absolute;
    top: 2px;
    left: 5px;
    width: 4px;
    height: 8px;
    border: solid #fff;
    border-width: 0 2px 2px 0;
    transform: rotate(45deg);
}

.email-row-top {
    display: contents;
}

.email-sender {
    width: 180px;
    flex-shrink: 0;
    font-size: 0.88rem;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.email-content {
    flex: 1;
    overflow: hidden;
    white-space: nowrap;
    text-overflow: ellipsis;
    font-size: 0.88rem;
}

.email-subject {
    color: var(--text);
}

.email-preview {
    color: var(--text-dim);
    margin-left: 6px;
}

.email-row.unread .email-preview {
    color: var(--text-muted);
}

.email-attachment-icon {
    flex-shrink: 0;
    color: var(--text-dim);
    display: flex;
}

.email-date {
    flex-shrink: 0;
    font-size: 0.78rem;
    color: var(--text-dim);
    white-space: nowrap;
}

/* === Bulk Actions Bar (always visible, fixed height) === */
.bulk-actions {
    display: flex;
    align-items: center;
    height: 44px;
    padding: 0 24px;
    background: var(--card);
    border-bottom: 1px solid var(--border);
    font-size: 0.85rem;
}

.bulk-inner {
    display: none;
    align-items: center;
    gap: 8px;
}

.bulk-inner.active {
    display: flex;
}

.bulk-default {
    display: flex;
}

.bulk-hint {
    color: var(--text-dim);
    font-size: 0.8rem;
}

.bulk-actions .count {
    color: var(--text-muted);
    margin-right: 8px;
    font-weight: 500;
}

/* === Empty State === */
.empty-state {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 100px 20px;
    color: var(--text-dim);
}

.empty-state svg {
    margin-bottom: 20px;
    opacity: 0.3;
}

.empty-state p {
    font-size: 0.95rem;
}

/* === Pagination === */
.pagination {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 16px;
    padding: 20px;
    border-top: 1px solid var(--border);
}

.page-info {
    font-size: 0.82rem;
    color: var(--text-dim);
}

/* === Read Email Layout === */
.read-layout {
    max-width: 920px;
    margin: 0 auto;
    padding: 24px;
    min-height: 100vh;
}

.read-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    margin-bottom: 24px;
}

.read-header-left {
    display: flex;
    align-items: center;
    gap: 12px;
}

.read-header-actions {
    display: flex;
    align-items: center;
    gap: 6px;
}

.read-folder {
    font-size: 0.82rem;
    color: var(--text-dim);
    background: var(--card);
    padding: 4px 10px;
    border-radius: 6px;
    border: 1px solid var(--border);
}

/* === Email Detail === */
.email-detail {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow);
    overflow: hidden;
}

.email-detail-header {
    padding: 28px;
    border-bottom: 1px solid var(--border);
}

.email-detail-subject {
    font-size: 1.35rem;
    font-weight: 700;
    margin-bottom: 18px;
    line-height: 1.3;
}

.email-meta {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.email-meta-row {
    display: flex;
    font-size: 0.85rem;
    gap: 12px;
}

.meta-label {
    color: var(--text-dim);
    width: 50px;
    flex-shrink: 0;
    font-weight: 600;
    text-transform: uppercase;
    font-size: 0.72rem;
    letter-spacing: 0.5px;
    padding-top: 2px;
}

.meta-value {
    color: var(--text-muted);
    overflow: hidden;
    text-overflow: ellipsis;
}

/* === Attachments === */
.attachments-section {
    padding: 16px 28px;
    border-bottom: 1px solid var(--border);
    background: var(--accent-soft);
}

.attachments-title {
    font-size: 0.82rem;
    font-weight: 600;
    color: var(--text-muted);
    margin-bottom: 10px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.attachment-list {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.attachment-item {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 6px 12px;
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    font-size: 0.82rem;
    color: var(--text-muted);
    transition: all var(--transition);
}

.attachment-item:hover {
    border-color: var(--accent);
    color: var(--text);
}

.attachment-size {
    color: var(--text-dim);
    font-size: 0.72rem;
}

/* === Email Body === */
.email-body {
    padding: 28px;
}

.email-text {
    font-size: 0.95rem;
    line-height: 1.8;
    color: var(--text);
    word-wrap: break-word;
}

.email-text a {
    color: var(--accent);
    text-decoration: underline;
    text-underline-offset: 2px;
}

.email-iframe {
    width: 100%;
    border: none;
    min-height: 400px;
    background: var(--bg);
    border-radius: var(--radius);
    border: 1px solid var(--border);
}

/* === Toast Notification === */
.toast {
    position: fixed;
    bottom: 24px;
    right: 24px;
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 12px 20px;
    font-size: 0.85rem;
    color: var(--text);
    box-shadow: var(--shadow);
    z-index: 9999;
    transform: translateY(100px);
    opacity: 0;
    transition: all 0.3s ease;
}

.toast.show {
    transform: translateY(0);
    opacity: 1;
}

.toast.success {
    border-color: rgba(34,197,94,0.3);
}

.toast.error {
    border-color: rgba(220,38,38,0.3);
}

/* === Loading Spinner === */
.spinner {
    display: inline-block;
    width: 16px;
    height: 16px;
    border: 2px solid var(--border);
    border-top-color: var(--accent);
    border-radius: 50%;
    animation: spin 0.6s linear infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

/* === Responsive === */
@media (max-width: 768px) {
    .mobile-header {
        display: flex;
    }

    .sidebar {
        transform: translateX(-100%);
        transition: transform 0.25s ease;
    }

    .sidebar.open {
        transform: translateX(0);
    }

    .sidebar-overlay.open {
        display: block;
    }

    .main-content {
        margin-left: 0;
        padding-top: 56px;
    }

    .toolbar {
        flex-direction: column;
        align-items: stretch;
        padding: 12px 16px;
        gap: 10px;
    }

    .toolbar-left {
        justify-content: space-between;
    }

    .search-form {
        max-width: none;
    }

    .email-row {
        flex-direction: column;
        align-items: stretch;
        padding: 14px 16px;
        gap: 0;
        border-left-width: 3px;
        overflow: hidden;
        min-width: 0;
    }

    .email-row-top {
        display: flex;
        align-items: center;
        justify-content: space-between;
        gap: 8px;
        margin-bottom: 3px;
        min-width: 0;
        overflow: hidden;
    }

    .email-sender {
        width: auto;
        flex: 1;
        font-size: 0.9rem;
        font-weight: 500;
        min-width: 0;
        overflow: hidden;
        text-overflow: ellipsis;
        white-space: nowrap;
    }

    .email-row.unread .email-sender {
        font-weight: 700;
    }

    .email-date {
        flex-shrink: 0;
        font-size: 0.75rem;
    }

    .email-content {
        display: block;
        width: 100%;
        max-width: 100%;
        min-width: 0;
        overflow: hidden;
        font-size: 0.82rem;
        line-height: 1.45;
        margin-top: 0;
    }

    .email-subject {
        display: block;
        font-size: 0.85rem;
        margin-bottom: 1px;
        white-space: nowrap;
        overflow: hidden;
        text-overflow: ellipsis;
        max-width: 100%;
    }

    .email-preview {
        display: block;
        margin-left: 0;
        color: var(--text-dim);
        white-space: nowrap;
        overflow: hidden;
        text-overflow: ellipsis;
        max-width: 100%;
    }

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

    .email-attachment-icon {
        display: none;
    }

    .email-checkbox {
        display: none;
    }

    .bulk-actions {
        display: none;
    }

    .read-layout {
        padding: 12px;
    }

    .read-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 10px;
    }

    .email-detail-header {
        padding: 18px;
    }

    .email-body {
        padding: 18px;
    }

    .email-detail-subject {
        font-size: 1.1rem;
    }

    .attachments-section {
        padding: 14px 18px;
    }
}

@media (max-width: 480px) {
    .login-card {
        padding: 32px 22px;
    }

    .read-header-actions {
        width: 100%;
        justify-content: flex-start;
    }
}