/* ========================================
   Oh My Coder - Unified Dark Theme
   与 Desktop 端一致的深色主题
   ======================================== */

/* ===== CSS Variables ===== */
:root {
    /* Dark Theme (默认) */
    --bg: #0c0e14;
    --bg-secondary: #13161f;
    --bg-tertiary: #1a1d28;
    --card: #161920;
    --card-hover: #1c1f2a;
    --text: #e2e8f0;
    --text-secondary: #94a3b8;
    --text-muted: #475569;
    --primary: #7c3aed;
    --primary-dark: #6d28d9;
    --primary-light: rgba(124, 58, 237, 0.25);
    --accent: #a78bfa;
    --success: #34d399;
    --success-bg: rgba(52, 211, 153, 0.1);
    --warning: #fbbf24;
    --warning-bg: rgba(251, 191, 36, 0.1);
    --danger: #f87171;
    --danger-bg: rgba(248, 113, 113, 0.1);
    --border: #1e2433;
    --border-hover: #2d3548;
    --shadow: 0 1px 3px rgba(0, 0, 0, 0.3);
    --shadow-lg: 0 10px 40px rgba(0, 0, 0, 0.4);
    --radius: 12px;
    --radius-lg: 16px;
    --radius-xl: 20px;
    --font-sans: 'Noto Sans SC', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-mono: 'JetBrains Mono', 'Fira Code', monospace;
    --transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

[data-theme="light"] {
    --bg: #f8fafc;
    --bg-secondary: #f1f5f9;
    --bg-tertiary: #e2e8f0;
    --card: #ffffff;
    --card-hover: #f8fafc;
    --text: #0f172a;
    --text-secondary: #475569;
    --text-muted: #94a3b8;
    --primary: #7c3aed;
    --primary-dark: #6d28d9;
    --primary-light: rgba(124, 58, 237, 0.15);
    --accent: #8b5cf6;
    --success: #10b981;
    --success-bg: rgba(16, 185, 129, 0.08);
    --warning: #f59e0b;
    --warning-bg: rgba(245, 158, 11, 0.08);
    --danger: #ef4444;
    --danger-bg: rgba(239, 68, 68, 0.08);
    --border: #e2e8f0;
    --border-hover: #cbd5e1;
    --shadow: 0 1px 3px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 40px rgba(0, 0, 0, 0.08);
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-sans);
    background: var(--bg);
    color: var(--text);
    line-height: 1.6;
    min-height: 100vh;
    -webkit-font-smoothing: antialiased;
    transition: background 0.3s, color 0.3s;
}

a { color: var(--primary); text-decoration: none; }
a:hover { text-decoration: underline; }

/* ===== 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-muted); }

/* ===== Navigation ===== */
.nav {
    background: var(--card);
    border-bottom: 1px solid var(--border);
    position: sticky;
    top: 0;
    z-index: 100;
    backdrop-filter: blur(12px);
}

.nav-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
    height: 60px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.nav-brand {
    display: flex;
    align-items: center;
    gap: 10px;
    text-decoration: none;
    color: var(--text);
}

.nav-brand-icon {
    font-size: 24px;
    line-height: 1;
}

.nav-brand-name {
    font-size: 18px;
    font-weight: 700;
    letter-spacing: -0.3px;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 4px;
}

.nav-link {
    padding: 8px 16px;
    border-radius: 8px;
    font-size: 14px;
    font-weight: 500;
    color: var(--text-secondary);
    text-decoration: none;
    transition: var(--transition);
}

.nav-link:hover {
    background: var(--primary-light);
    color: var(--primary);
    text-decoration: none;
}

.nav-link.active {
    background: var(--primary-light);
    color: var(--primary);
}

.nav-actions {
    display: flex;
    align-items: center;
    gap: 8px;
}

.nav-toggle {
    width: 36px;
    height: 36px;
    border-radius: 8px;
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 16px;
    cursor: pointer;
    transition: var(--transition);
    color: var(--text-secondary);
}

.nav-toggle:hover {
    background: var(--border);
    color: var(--text);
}

/* Mobile nav */
.nav-hamburger {
    display: none;
    width: 36px;
    height: 36px;
    border-radius: 8px;
    background: none;
    border: 1px solid var(--border);
    align-items: center;
    justify-content: center;
    font-size: 18px;
    cursor: pointer;
    color: var(--text);
}

@media (max-width: 768px) {
    .nav-links { display: none; }
    .nav-hamburger { display: flex; }
    .nav-links.open {
        display: flex;
        flex-direction: column;
        position: absolute;
        top: 60px;
        left: 0;
        right: 0;
        background: var(--card);
        border-bottom: 1px solid var(--border);
        padding: 12px;
        gap: 4px;
    }
    .nav-links.open .nav-link {
        padding: 12px 16px;
        width: 100%;
    }
}

/* ===== Container ===== */
.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 32px 24px;
}

.container-wide {
    max-width: 1400px;
    margin: 0 auto;
    padding: 32px 24px;
}

/* ===== Buttons ===== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 10px 20px;
    border-radius: var(--radius);
    font-size: 14px;
    font-weight: 500;
    font-family: inherit;
    cursor: pointer;
    border: none;
    text-decoration: none;
    transition: var(--transition);
    white-space: nowrap;
}

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

.btn-ghost:hover {
    background: var(--bg-secondary);
    color: var(--text);
    border-color: var(--border-hover);
    text-decoration: none;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    color: white;
    box-shadow: 0 4px 12px rgba(99, 102, 241, 0.3);
}

.btn-primary:hover {
    transform: translateY(-1px);
    box-shadow: 0 6px 20px rgba(99, 102, 241, 0.4);
}

.btn-primary:active {
    transform: translateY(0);
}

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

.btn-danger:hover {
    background: #ef4444;
}

.btn-sm {
    padding: 6px 14px;
    font-size: 13px;
    border-radius: 8px;
}

.btn-submit {
    width: 100%;
    padding: 14px 28px;
    font-size: 16px;
    border-radius: var(--radius-lg);
    position: relative;
    overflow: hidden;
}

.btn-submit.loading { pointer-events: none; }

.btn-submit .btn-spinner {
    display: none;
    width: 18px;
    height: 18px;
    border: 2px solid rgba(255, 255, 255, 0.4);
    border-top-color: white;
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

.btn-submit.loading .btn-text { display: none; }
.btn-submit.loading .btn-spinner { display: block; }

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

/* ===== Cards ===== */
.card {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 24px;
    transition: var(--transition);
}

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

.card-header {
    margin-bottom: 20px;
}

.card-title {
    font-size: 18px;
    font-weight: 600;
    color: var(--text);
    margin-bottom: 4px;
}

.card-desc {
    font-size: 14px;
    color: var(--text-muted);
}

/* ===== Form Elements ===== */
.form-group {
    display: flex;
    flex-direction: column;
    gap: 8px;
    margin-bottom: 20px;
}

.form-label {
    font-size: 13px;
    font-weight: 600;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.form-link {
    display: inline-block;
    font-size: 12px;
    color: var(--primary);
    text-decoration: none;
    transition: color 0.2s;
}
.form-link:hover { color: var(--primary-hover); text-decoration: underline; }

.form-textarea,
.form-input,
.form-select {
    width: 100%;
    padding: 12px 16px;
    background: var(--bg-secondary);
    border: 1.5px solid var(--border);
    border-radius: var(--radius);
    font-size: 14px;
    font-family: inherit;
    color: var(--text);
    transition: var(--transition);
    outline: none;
}

.form-textarea:focus,
.form-input:focus,
.form-select:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
    background: var(--card);
}

.form-textarea {
    resize: vertical;
    min-height: 120px;
    font-family: var(--font-mono);
    font-size: 13px;
    line-height: 1.6;
}

.form-select {
    cursor: pointer;
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' fill='%2394a3b8' viewBox='0 0 16 16'%3E%3Cpath d='M8 11L3 6h10z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 14px center;
    padding-right: 40px;
}

.form-hint {
    font-size: 12px;
    color: var(--text-muted);
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr 1fr;
    gap: 16px;
    align-items: start;
}

/* Target tabs row */
.target-tabs-row {
    display: flex;
    gap: 0;
    margin-bottom: 8px;
    background: var(--bg-secondary);
    border-radius: 8px;
    border: 1px solid var(--border);
    overflow: hidden;
}

/* Quick buttons row */
.quick-buttons-row {
    display: flex;
    gap: 6px;
    margin-top: 6px;
    flex-wrap: nowrap;
}

.quick-btn {
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: 6px;
    padding: 3px 10px;
    font-size: 12px;
    cursor: pointer;
    color: var(--text-secondary);
    white-space: nowrap;
}

.quick-btn:hover {
    background: var(--border);
    color: var(--text-primary);
}

/* ===== Badge ===== */
.badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 4px 12px;
    border-radius: 100px;
    font-size: 12px;
    font-weight: 600;
}

.badge-primary {
    background: var(--primary-light);
    color: var(--primary);
}

.badge-success {
    background: var(--success-bg);
    color: var(--success);
}

.badge-warning {
    background: var(--warning-bg);
    color: var(--warning);
}

.badge-danger {
    background: var(--danger-bg);
    color: var(--danger);
}

.badge-free {
    background: rgba(52, 211, 153, 0.15);
    color: #34d399;
}

.badge-low {
    background: rgba(99, 102, 241, 0.15);
    color: #818cf8;
}

.badge-medium {
    background: rgba(251, 191, 36, 0.15);
    color: #fbbf24;
}

.badge-muted {
    background: var(--bg-secondary);
    color: var(--text-muted);
}

/* ===== Stats Grid ===== */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
    gap: 16px;
}

.stat-card {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 20px;
    text-align: center;
}

.stat-value {
    font-size: 28px;
    font-weight: 700;
    color: var(--primary);
    font-family: var(--font-mono);
}

.stat-label {
    font-size: 12px;
    color: var(--text-muted);
    margin-top: 4px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

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

table {
    width: 100%;
    border-collapse: collapse;
    font-size: 14px;
}

th, td {
    padding: 12px 16px;
    text-align: left;
    border-bottom: 1px solid var(--border);
}

th {
    background: var(--bg-secondary);
    font-weight: 600;
    color: var(--text-secondary);
    font-size: 12px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

tr:last-child td { border-bottom: none; }

tr:hover td {
    background: var(--bg-secondary);
}

/* ===== Empty State ===== */
.empty-state {
    text-align: center;
    padding: 60px 24px;
    color: var(--text-muted);
}

.empty-state-icon {
    font-size: 48px;
    margin-bottom: 16px;
    display: block;
}

.empty-state-title {
    font-size: 18px;
    font-weight: 600;
    color: var(--text-secondary);
    margin-bottom: 8px;
}

.empty-state-desc {
    font-size: 14px;
    max-width: 400px;
    margin: 0 auto;
}

/* ===== Toast Notifications ===== */
.toast-container {
    position: fixed;
    top: 24px;
    right: 24px;
    z-index: 9999;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.toast {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 14px 18px;
    box-shadow: var(--shadow-lg);
    display: flex;
    align-items: center;
    gap: 10px;
    animation: toastIn 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    max-width: 360px;
    font-size: 14px;
}

.toast.success { border-left: 4px solid var(--success); }
.toast.error { border-left: 4px solid var(--danger); }
.toast.info { border-left: 4px solid var(--primary); }

@keyframes toastIn {
    from { opacity: 0; transform: translateX(20px); }
    to { opacity: 1; transform: translateX(0); }
}

/* ===== Footer ===== */
.footer {
    text-align: center;
    padding: 32px 24px;
    font-size: 13px;
    color: var(--text-muted);
    border-top: 1px solid var(--border);
    margin-top: 40px;
}

/* ===== Page Title ===== */
.page-title {
    font-size: 28px;
    font-weight: 700;
    color: var(--text);
    margin-bottom: 8px;
    letter-spacing: -0.5px;
}

.page-desc {
    font-size: 15px;
    color: var(--text-secondary);
    margin-bottom: 32px;
}

/* ===== Tabs ===== */
.tabs {
    display: flex;
    gap: 4px;
    margin-bottom: 24px;
    border-bottom: 1px solid var(--border);
    padding-bottom: 0;
}

.tab {
    padding: 10px 20px;
    border: none;
    background: none;
    color: var(--text-secondary);
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    border-bottom: 2px solid transparent;
    margin-bottom: -1px;
    transition: var(--transition);
    font-family: inherit;
}

.tab:hover {
    color: var(--text);
}

.tab.active {
    color: var(--primary);
    border-bottom-color: var(--primary);
}

/* ===== Hero ===== */
.hero {
    text-align: center;
    margin-bottom: 48px;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 6px 14px;
    background: var(--primary-light);
    border: 1px solid var(--border);
    border-radius: 100px;
    font-size: 13px;
    color: var(--primary);
    font-weight: 500;
    margin-bottom: 24px;
}

.badge-dot {
    width: 6px;
    height: 6px;
    background: var(--success);
    border-radius: 50%;
    animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.4; }
}

.hero-title {
    font-size: 42px;
    font-weight: 700;
    color: var(--text);
    letter-spacing: -1px;
    line-height: 1.2;
    margin-bottom: 16px;
}

.hero-desc {
    font-size: 17px;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto;
    line-height: 1.7;
}

/* ===== Feature Grid ===== */
.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 16px; }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }

.feature-card {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 24px 20px;
    text-align: center;
    transition: var(--transition);
}

.feature-card:hover {
    border-color: var(--border-hover);
    box-shadow: var(--shadow);
    transform: translateY(-2px);
}

.feature-icon {
    font-size: 32px;
    margin-bottom: 12px;
    display: block;
}

.feature-card h4 {
    font-size: 15px;
    font-weight: 600;
    color: var(--text);
    margin-bottom: 8px;
}

.feature-card p {
    font-size: 12px;
    color: var(--text-muted);
    line-height: 1.6;
}

/* ===== Markdown Content ===== */
.markdown-body {
    font-size: 14px;
    line-height: 1.8;
    color: var(--text);
}

.markdown-body h1, .markdown-body h2, .markdown-body h3 {
    margin: 24px 0 12px;
    font-weight: 600;
    color: var(--text);
}

.markdown-body h1 { font-size: 22px; }
.markdown-body h2 { font-size: 18px; }
.markdown-body h3 { font-size: 16px; }

.markdown-body p { margin: 12px 0; }

.markdown-body code {
    background: rgba(99, 102, 241, 0.08);
    color: var(--primary);
    padding: 2px 6px;
    border-radius: 4px;
    font-family: var(--font-mono);
    font-size: 13px;
}

.markdown-body pre {
    background: #0d1117;
    border-radius: var(--radius);
    padding: 20px;
    overflow-x: auto;
    margin: 16px 0;
}

.markdown-body pre code {
    background: none;
    color: #c9d1d9;
    padding: 0;
}

.markdown-body blockquote {
    border-left: 4px solid var(--primary);
    margin: 16px 0;
    padding: 12px 20px;
    background: var(--primary-light);
    border-radius: 0 8px 8px 0;
    color: var(--text-secondary);
}

/* ===== App Layout: Sidebar + Main ===== */
.app-layout {
    display: flex;
    height: calc(100vh - 60px);
    overflow: hidden;
}

.sidebar {
    width: 240px;
    background: var(--bg-secondary);
    border-right: 1px solid var(--border);
    display: flex;
    flex-direction: column;
    flex-shrink: 0;
    overflow: hidden;
}

.sidebar-header {
    padding: 16px;
    border-bottom: 1px solid var(--border);
}

.sidebar-search {
    padding: 12px 16px;
}

.session-list {
    flex: 1;
    overflow-y: auto;
    padding: 8px;
}

.session-item {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 12px;
    border-radius: var(--radius);
    cursor: pointer;
    transition: var(--transition);
    margin-bottom: 2px;
}

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

.session-item.active {
    background: var(--primary-light);
    border: 1px solid var(--primary);
}

.session-item-title {
    flex: 1;
    font-size: 13px;
    font-weight: 500;
    color: var(--text);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.session-item-time {
    font-size: 11px;
    color: var(--text-muted);
}

.session-item-delete {
    opacity: 0;
    cursor: pointer;
    font-size: 14px;
    transition: var(--transition);
}

.session-item:hover .session-item-delete {
    opacity: 1;
}

.main-content {
    flex: 1;
    overflow-y: auto;
    padding: 20px 32px;
}

/* ===== Bottom Status Bar ===== */
.status-bar {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    height: 48px;
    background: var(--bg-secondary);
    border-top: 1px solid var(--border);
    z-index: 100;
}

.status-bar-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 100%;
    padding: 0 24px;
}

.status-agent {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 13px;
    color: var(--text-secondary);
}

.status-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--success);
}

.status-dot.running {
    background: var(--warning);
    animation: pulse 1.5s infinite;
}

.status-time {
    font-size: 12px;
    color: var(--text-muted);
}


/* ===== Responsive ===== */
@media (max-width: 768px) {
    .container { padding: 20px 16px; }
    .container-wide { padding: 20px 16px; }
    .hero-title { font-size: 28px; }
    .hero-desc { font-size: 15px; }
    .form-row { grid-template-columns: 1fr; }
    .grid-4 { grid-template-columns: repeat(2, 1fr); }
    .grid-3 { grid-template-columns: 1fr; }
    .grid-2 { grid-template-columns: 1fr; }
    .page-title { font-size: 22px; }
    .stats-grid { grid-template-columns: repeat(2, 1fr); }
    .sidebar { display: none; }
}

@media (max-width: 480px) {
    .grid-4 { grid-template-columns: 1fr; }
    .stats-grid { grid-template-columns: 1fr; }
    .btn { padding: 8px 16px; font-size: 13px; }
    .card { padding: 16px; }
}