/* GoGoMail — Dark Refined Theme */

/* ═══════════════════════════════
   Fonts
   ═══════════════════════════════ */

@font-face {
    font-family: 'General Sans';
    src: url('/static/fonts/general-sans-400.woff2') format('woff2');
    font-weight: 400;
    font-display: swap;
    font-style: normal;
}

@font-face {
    font-family: 'General Sans';
    src: url('/static/fonts/general-sans-500.woff2') format('woff2');
    font-weight: 500;
    font-display: swap;
    font-style: normal;
}

@font-face {
    font-family: 'General Sans';
    src: url('/static/fonts/general-sans-600.woff2') format('woff2');
    font-weight: 600;
    font-display: swap;
    font-style: normal;
}

@font-face {
    font-family: 'General Sans';
    src: url('/static/fonts/general-sans-700.woff2') format('woff2');
    font-weight: 700;
    font-display: swap;
    font-style: normal;
}

/* ═══════════════════════════════
   Design Tokens
   ═══════════════════════════════ */

:root {
    --bg-deep: #131316;
    --bg-primary: #1a1a1f;
    --bg-elevated: #222228;
    --bg-hover: #2a2a31;
    --bg-active: #32323a;

    --text-primary: #ececef;
    --text-secondary: #a0a0a8;
    --text-tertiary: #71717a;

    --accent: #2563eb;
    --accent-hover: #1d4ed8;
    --accent-soft: rgba(37, 99, 235, 0.12);
    --accent-glow: rgba(37, 99, 235, 0.18);

    --border: #2a2a31;
    --border-hover: #3a3a44;

    --danger: #ef4444;
    --danger-soft: rgba(239, 68, 68, 0.1);
    --success: #22c55e;
    --success-soft: rgba(34, 197, 94, 0.1);

    --radius: 8px;
    --radius-sm: 6px;
    --radius-lg: 12px;

    --shadow: 0 1px 3px rgba(0, 0, 0, 0.3), 0 1px 2px rgba(0, 0, 0, 0.2);
    --shadow-lg: 0 4px 12px rgba(0, 0, 0, 0.4);

    --sidebar-width: 240px;
    --list-width: 360px;

    --transition-fast: 150ms ease;
    --transition: 200ms ease;
    --transition-slow: 300ms ease;
}


/* ═══════════════════════════════
   Reset & Base
   ═══════════════════════════════ */

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

body {
    font-family: 'General Sans', -apple-system, BlinkMacSystemFont, sans-serif;
    background: var(--bg-deep);
    color: var(--text-primary);
    line-height: 1.5;
    min-height: 100vh;
    font-size: 14px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

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

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


/* ═══════════════════════════════
   Scrollbar
   ═══════════════════════════════ */

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

::-webkit-scrollbar-track {
    background: transparent;
}

::-webkit-scrollbar-thumb {
    background: var(--border-hover);
    border-radius: 3px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--text-tertiary);
}


/* ═══════════════════════════════
   3-Column App Layout
   ═══════════════════════════════ */

.app-layout {
    display: grid;
    grid-template-columns: var(--sidebar-width) var(--list-width) 1fr;
    min-height: 100vh;
}

.app-layout--two-col {
    grid-template-columns: var(--sidebar-width) 1fr;
}


/* ═══════════════════════════════
   Sidebar
   ═══════════════════════════════ */

.sidebar {
    background: var(--bg-primary);
    border-right: 1px solid var(--border);
    display: flex;
    flex-direction: column;
    height: 100vh;
    position: sticky;
    top: 0;
    overflow-y: auto;
    z-index: 30;
}

.sidebar-header {
    padding: 1.25rem 1rem 1rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.sidebar-brand {
    font-size: 1.125rem;
    font-weight: 700;
    color: var(--text-primary);
    letter-spacing: -0.02em;
}

.sidebar-close {
    display: none;
}

.sidebar-compose {
    margin: 0 0.75rem 0.75rem;
}

.sidebar-compose .btn {
    width: 100%;
    justify-content: center;
    gap: 0.5rem;
}

.sidebar-nav {
    list-style: none;
    padding: 0 0.5rem;
    flex: 1;
}

.sidebar-nav li + li {
    margin-top: 1px;
}

.sidebar-nav a {
    display: flex;
    align-items: center;
    gap: 0.625rem;
    padding: 0.5rem 0.75rem;
    border-radius: var(--radius-sm);
    color: var(--text-secondary);
    font-size: 0.8125rem;
    font-weight: 500;
    transition: background var(--transition-fast), color var(--transition-fast);
}

.sidebar-nav a:hover {
    background: var(--bg-hover);
    color: var(--text-primary);
}

.sidebar-nav a.active {
    background: var(--accent-soft);
    color: var(--accent);
}

.sidebar-nav .nav-icon {
    font-size: 1rem;
    width: 1.25rem;
    text-align: center;
    opacity: 0.7;
}

.sidebar-footer {
    margin-top: auto;
    padding: 1rem;
    border-top: 1px solid var(--border);
    font-size: 0.8125rem;
}

.sidebar-user {
    color: var(--text-secondary);
    font-weight: 500;
    margin-bottom: 0.375rem;
}

.sidebar-links {
    display: flex;
    gap: 0.75rem;
}

.sidebar-links a {
    color: var(--text-tertiary);
    font-size: 0.75rem;
    transition: color var(--transition-fast);
}

.sidebar-links a:hover {
    color: var(--text-primary);
}


/* ═══════════════════════════════
   Message List Pane
   ═══════════════════════════════ */

.message-list-pane {
    border-right: 1px solid var(--border);
    display: flex;
    flex-direction: column;
    height: 100vh;
    overflow: hidden;
}

.list-header {
    padding: 1rem 1.25rem;
    border-bottom: 1px solid var(--border);
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-shrink: 0;
}

.list-header h1 {
    font-size: 1rem;
    font-weight: 600;
    letter-spacing: -0.01em;
}

.list-scroll {
    flex: 1;
    overflow-y: auto;
}

.message-list {
    list-style: none;
}

.message-item {
    display: flex;
    align-items: flex-start;
    gap: 0.75rem;
    padding: 0.75rem 1.25rem;
    border-bottom: 1px solid var(--border);
    cursor: pointer;
    color: var(--text-primary);
    transition: background var(--transition-fast);
    position: relative;
}

.message-item:hover {
    background: var(--bg-hover);
}

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

.message-item.unread::before {
    content: '';
    position: absolute;
    left: 6px;
    top: 50%;
    transform: translateY(-50%);
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--accent);
}

.message-item.unread {
    padding-left: 1.25rem;
}

.message-item.unread .message-from {
    font-weight: 600;
    color: var(--text-primary);
}

.message-item-content {
    flex: 1;
    min-width: 0;
}

.message-from {
    font-size: 0.8125rem;
    font-weight: 500;
    color: var(--text-secondary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.message-subject {
    font-size: 0.8125rem;
    color: var(--text-tertiary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    margin-top: 0.125rem;
}

.message-date {
    font-size: 0.6875rem;
    color: var(--text-tertiary);
    white-space: nowrap;
    flex-shrink: 0;
    padding-top: 0.125rem;
}


/* ═══════════════════════════════
   Reading Pane
   ═══════════════════════════════ */

.reading-pane {
    height: 100vh;
    overflow-y: auto;
    background: var(--bg-deep);
}

.reading-pane-empty {
    display: flex;
    align-items: center;
    justify-content: center;
    height: 100%;
    color: var(--text-tertiary);
    font-size: 0.875rem;
}

.reading-pane-back {
    display: none;
}

.message-content-area {
    padding: 1.5rem;
    max-width: 800px;
}

.message-actions {
    display: flex;
    gap: 0.5rem;
    margin-bottom: 1.25rem;
    flex-wrap: wrap;
}

/* Hide "Back" button when inside the reading pane */
#reading-pane .message-actions .btn-back {
    display: none;
}

.message-header {
    background: var(--bg-elevated);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 1.25rem;
    margin-bottom: 1rem;
}

.message-header h2 {
    font-size: 1.125rem;
    font-weight: 600;
    margin-bottom: 0.625rem;
    letter-spacing: -0.01em;
    line-height: 1.3;
}

.message-meta {
    font-size: 0.8125rem;
    color: var(--text-secondary);
    line-height: 1.6;
}

.message-meta div + div {
    margin-top: 0.125rem;
}

.message-body {
    background: var(--bg-elevated);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 1.25rem;
}

.message-body pre {
    white-space: pre-wrap;
    word-wrap: break-word;
    font-family: 'General Sans', -apple-system, sans-serif;
    font-size: 0.875rem;
    line-height: 1.6;
    color: var(--text-primary);
}


/* ═══════════════════════════════
   Auth Pages
   ═══════════════════════════════ */

.auth-page {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    padding: 1rem;
    background: var(--bg-deep);
}

.auth-card {
    background: var(--bg-primary);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    padding: 2.5rem;
    width: 100%;
    max-width: 400px;
}

.auth-card h1 {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
    text-align: center;
    letter-spacing: -0.02em;
}

.auth-subtitle {
    text-align: center;
    color: var(--text-tertiary);
    font-size: 0.875rem;
    margin-bottom: 2rem;
}

.auth-footer {
    text-align: center;
    margin-top: 1.5rem;
    font-size: 0.8125rem;
    color: var(--text-tertiary);
}


/* ═══════════════════════════════
   Forms
   ═══════════════════════════════ */

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

.form-group label {
    display: block;
    font-weight: 500;
    margin-bottom: 0.375rem;
    font-size: 0.8125rem;
    color: var(--text-secondary);
}

.form-control {
    width: 100%;
    padding: 0.5rem 0.75rem;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    font-size: 0.875rem;
    line-height: 1.5;
    font-family: inherit;
    background: var(--bg-elevated);
    color: var(--text-primary);
    transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.form-control::placeholder {
    color: var(--text-tertiary);
}

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

.form-control:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

textarea.form-control {
    min-height: 200px;
    resize: vertical;
}

input[type="file"].form-control {
    padding: 0.375rem 0.75rem;
    font-size: 0.8125rem;
}

input[type="file"].form-control::file-selector-button {
    background: var(--bg-hover);
    color: var(--text-secondary);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    padding: 0.25rem 0.75rem;
    margin-right: 0.75rem;
    font-size: 0.8125rem;
    font-family: inherit;
    cursor: pointer;
    transition: background var(--transition-fast);
}

input[type="file"].form-control::file-selector-button:hover {
    background: var(--bg-active);
}


/* ═══════════════════════════════
   Buttons
   ═══════════════════════════════ */

.btn {
    display: inline-flex;
    align-items: center;
    padding: 0.5rem 1rem;
    border: 1px solid var(--border-hover);
    border-radius: var(--radius-sm);
    font-size: 0.8125rem;
    font-weight: 500;
    font-family: inherit;
    cursor: pointer;
    text-align: center;
    line-height: 1.5;
    transition: background var(--transition-fast), border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.btn-primary {
    background: var(--accent);
    color: #fff;
    border-color: #4a7fe0;
}

.btn-primary:hover {
    background: var(--accent-hover);
    border-color: #3b6fd4;
    box-shadow: 0 0 12px var(--accent-glow);
}

.btn-danger {
    background: var(--danger-soft);
    color: var(--danger);
    border-color: rgba(239, 68, 68, 0.3);
}

.btn-danger:hover {
    background: rgba(239, 68, 68, 0.18);
    border-color: rgba(239, 68, 68, 0.4);
}

.btn-outline {
    background: transparent;
    color: var(--text-secondary);
    border-color: var(--border-hover);
}

.btn-outline:hover {
    background: var(--bg-hover);
    border-color: #484852;
    color: var(--text-primary);
}

.btn-block {
    display: flex;
    width: 100%;
    justify-content: center;
}

.btn-sm {
    padding: 0.3125rem 0.625rem;
    font-size: 0.75rem;
}


/* ═══════════════════════════════
   Alerts
   ═══════════════════════════════ */

.alert {
    padding: 0.75rem 1rem;
    border-radius: var(--radius-sm);
    margin-bottom: 1rem;
    font-size: 0.8125rem;
    border: 1px solid transparent;
}

.alert-error {
    background: var(--danger-soft);
    color: #fca5a5;
    border-color: rgba(239, 68, 68, 0.2);
}

.alert-success {
    background: var(--success-soft);
    color: #86efac;
    border-color: rgba(34, 197, 94, 0.2);
}


/* ═══════════════════════════════
   Toolbar (compose/settings pages)
   ═══════════════════════════════ */

.toolbar {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 1.25rem;
}

.toolbar h1 {
    font-size: 1.125rem;
    font-weight: 600;
    letter-spacing: -0.01em;
}


/* ═══════════════════════════════
   Content Area (compose/settings)
   ═══════════════════════════════ */

.main-content {
    padding: 1.5rem;
    max-width: 700px;
}


/* ═══════════════════════════════
   Empty State
   ═══════════════════════════════ */

.empty-state {
    text-align: center;
    padding: 3rem 1rem;
    color: var(--text-tertiary);
    font-size: 0.875rem;
}


/* ═══════════════════════════════
   Hamburger Toggle
   ═══════════════════════════════ */

.hamburger {
    display: none;
    background: none;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    padding: 0.375rem;
    border-radius: var(--radius-sm);
    transition: background var(--transition-fast);
}

.hamburger:hover {
    background: var(--bg-hover);
}

.hamburger svg {
    display: block;
    width: 20px;
    height: 20px;
}

.sidebar-backdrop {
    display: none;
}


/* ═══════════════════════════════
   Utility
   ═══════════════════════════════ */

.text-muted { color: var(--text-tertiary); }
.text-sm { font-size: 0.8125rem; }
.mt-1 { margin-top: 0.5rem; }
.mb-1 { margin-bottom: 0.5rem; }


/* ═══════════════════════════════
   Responsive — Tablet
   ═══════════════════════════════ */

@media (max-width: 1024px) {
    .app-layout {
        grid-template-columns: var(--sidebar-width) 1fr;
    }

    .reading-pane {
        display: none;
    }

    .message-list-pane {
        border-right: none;
    }

    /* On tablet, message links navigate instead of HTMX */
    .message-item[hx-get] {
        /* HTMX still fires but reading pane is hidden;
           the href fallback handles navigation */
    }

    /* Show reading pane as overlay when message is loaded */
    body.reading-pane-open .reading-pane {
        display: flex;
        flex-direction: column;
        position: fixed;
        inset: 0;
        left: var(--sidebar-width);
        z-index: 20;
        background: var(--bg-deep);
    }

    body.reading-pane-open .reading-pane-back {
        display: flex;
    }
}


/* ═══════════════════════════════
   Responsive — Mobile
   ═══════════════════════════════ */

@media (max-width: 768px) {
    .app-layout {
        grid-template-columns: 1fr;
    }

    .app-layout--two-col {
        grid-template-columns: 1fr;
    }

    /* Sidebar — off-canvas overlay */
    .sidebar {
        position: fixed;
        inset: 0;
        width: 280px;
        transform: translateX(-100%);
        transition: transform var(--transition-slow);
        z-index: 50;
    }

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

    .sidebar-close {
        display: block;
        background: none;
        border: none;
        color: var(--text-tertiary);
        cursor: pointer;
        padding: 0.25rem;
    }

    .sidebar-close svg {
        display: block;
        width: 18px;
        height: 18px;
    }

    body.sidebar-open .sidebar-backdrop {
        display: block;
        position: fixed;
        inset: 0;
        background: rgba(0, 0, 0, 0.6);
        z-index: 40;
    }

    .hamburger {
        display: flex;
    }

    .list-header {
        gap: 0.75rem;
    }

    /* Reading pane as full-screen overlay on mobile */
    .reading-pane {
        display: none;
    }

    body.reading-pane-open .reading-pane {
        display: flex;
        flex-direction: column;
        position: fixed;
        inset: 0;
        z-index: 20;
        background: var(--bg-deep);
    }

    body.reading-pane-open .reading-pane-back {
        display: flex;
    }

    .message-content-area {
        padding: 1rem;
    }
}


/* ═══════════════════════════════
   Reading Pane Back Button
   ═══════════════════════════════ */

.reading-pane-back {
    display: none;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1rem;
    border-bottom: 1px solid var(--border);
    background: var(--bg-primary);
    color: var(--text-secondary);
    font-size: 0.8125rem;
    font-weight: 500;
    cursor: pointer;
    flex-shrink: 0;
    border: none;
    font-family: inherit;
    width: 100%;
    text-align: left;
}

.reading-pane-back:hover {
    background: var(--bg-hover);
    color: var(--text-primary);
}

.reading-pane-back svg {
    width: 16px;
    height: 16px;
}