/* ── PathMind Base Styles ── */

/* CSS Variables */
:root {
    --bg-primary: #f5f7fa;
    --bg-secondary: #eef1f6;
    --bg-card: #ffffff;
    --bg-card-hover: #f8fafc;
    --accent-primary: #3b82f6;
    --accent-secondary: #8b5cf6;
    --accent-green: #10b981;
    --accent-amber: #f59e0b;
    --accent-red: #ef4444;
    --text-primary: #1e293b;
    --text-secondary: #64748b;
    --text-muted: #94a3b8;
    --border-subtle: rgba(59, 130, 246, 0.12);
    --border-light: #e2e8f0;
    --border-active: rgba(59, 130, 246, 0.5);
    --glow-primary: rgba(59, 130, 246, 0.06);
    --glow-secondary: rgba(139, 92, 246, 0.06);
    --shadow-sm: 0 1px 3px rgba(0,0,0,0.06), 0 1px 2px rgba(0,0,0,0.04);
    --shadow-md: 0 4px 16px rgba(0,0,0,0.08), 0 2px 6px rgba(0,0,0,0.04);
    --shadow-lg: 0 8px 32px rgba(0,0,0,0.1), 0 4px 12px rgba(0,0,0,0.06);
}

/* Reset */
* { margin: 0; padding: 0; box-sizing: border-box; }

/* Body */
body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    min-height: 100vh;
    overflow-x: hidden;
}

/* Subtle background pattern */
body::before {
    content: '';
    position: fixed;
    inset: 0;
    background-image:
        radial-gradient(circle at 20% 20%, rgba(59, 130, 246, 0.04) 0%, transparent 50%),
        radial-gradient(circle at 80% 80%, rgba(139, 92, 246, 0.04) 0%, transparent 50%);
    pointer-events: none;
    z-index: 0;
}

/* ── Ambient Orbs (subtle for light theme) ── */
.orb {
    position: fixed;
    border-radius: 50%;
    filter: blur(80px);
    pointer-events: none;
    z-index: 0;
}
.orb-1 {
    width: 500px; height: 500px;
    background: radial-gradient(circle, rgba(59, 130, 246, 0.08) 0%, transparent 70%);
    top: -150px; right: -100px;
    animation: orbFloat 14s ease-in-out infinite;
}
.orb-2 {
    width: 400px; height: 400px;
    background: radial-gradient(circle, rgba(139, 92, 246, 0.07) 0%, transparent 70%);
    bottom: -100px; left: -80px;
    animation: orbFloat 18s ease-in-out infinite reverse;
}

@keyframes orbFloat {
    0%, 100% { transform: translate(0, 0); }
    50% { transform: translate(16px, -16px); }
}

/* ── Animations ── */
@keyframes fadeDown {
    from { opacity: 0; transform: translateY(-12px); }
    to { opacity: 1; transform: translateY(0); }
}

@keyframes fadeUp {
    from { opacity: 0; transform: translateY(16px); }
    to { opacity: 1; transform: translateY(0); }
}

@keyframes pulse {
    0%, 100% { opacity: 1; transform: scale(1); }
    50% { opacity: 0.5; transform: scale(0.8); }
}

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

/* ── Top Nav ── */
.top-nav {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 40px;
    padding: 14px 20px;
    background: var(--bg-card);
    border: 1px solid var(--border-light);
    border-radius: 16px;
    box-shadow: var(--shadow-sm);
    animation: fadeDown 0.5s ease both;
}

.nav-left {
    display: flex;
    align-items: center;
    gap: 14px;
}

.nav-logo {
    font-size: 18px;
    font-weight: 700;
    color: var(--accent-primary);
    text-decoration: none;
    letter-spacing: -0.02em;
}

.nav-divider {
    width: 1px;
    height: 16px;
    background: var(--border-light);
}

.nav-page-title {
    font-size: 13px;
    color: var(--text-muted);
    letter-spacing: 0.02em;
}

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

/* ── User Chip ── */
.user-chip {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 5px 12px 5px 6px;
    background: var(--bg-secondary);
    border: 1px solid var(--border-light);
    border-radius: 100px;
    font-size: 13px;
    color: var(--text-secondary);
}

.user-avatar, .user-chip-avatar {
    width: 24px; height: 24px;
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 11px;
    font-weight: 700;
    color: white;
    flex-shrink: 0;
}

/* ── Nav Buttons ── */
.btn-nav {
    padding: 6px 14px;
    border-radius: 8px;
    font-size: 13px;
    cursor: pointer;
    transition: all 0.18s;
    text-decoration: none;
    border: 1px solid;
    font-weight: 500;
}

.btn-nav-home {
    background: rgba(59, 130, 246, 0.06);
    border-color: rgba(59, 130, 246, 0.2);
    color: var(--accent-primary);
}
.btn-nav-home:hover { background: rgba(59, 130, 246, 0.12); }

.btn-nav-history {
    background: rgba(16, 185, 129, 0.06);
    border-color: rgba(16, 185, 129, 0.2);
    color: var(--accent-green);
}
.btn-nav-history:hover { background: rgba(16, 185, 129, 0.12); }

.btn-nav-admin {
    background: rgba(139, 92, 246, 0.06);
    border-color: rgba(139, 92, 246, 0.2);
    color: var(--accent-secondary);
}
.btn-nav-admin:hover { background: rgba(139, 92, 246, 0.12); }

.btn-nav-logout {
    background: rgba(239, 68, 68, 0.05);
    border-color: rgba(239, 68, 68, 0.15);
    color: var(--accent-red);
}
.btn-nav-logout:hover { background: rgba(239, 68, 68, 0.1); }

/* ── Logo Badge ── */
.logo-badge {
    display: inline-flex;
    align-items: center;
    gap: 7px;
    background: rgba(59, 130, 246, 0.07);
    border: 1px solid rgba(59, 130, 246, 0.18);
    border-radius: 100px;
    padding: 5px 14px 5px 10px;
    font-size: 11px;
    color: var(--accent-primary);
    letter-spacing: 0.06em;
    font-weight: 500;
}

.logo-dot {
    width: 6px; height: 6px;
    background: var(--accent-primary);
    border-radius: 50%;
    box-shadow: 0 0 6px rgba(59, 130, 246, 0.5);
    animation: pulse 2s ease-in-out infinite;
}

/* ── Section Title ── */
.section-title {
    font-size: 16px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 16px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.section-title::before {
    content: '';
    display: block;
    width: 3px;
    height: 16px;
    background: linear-gradient(to bottom, var(--accent-primary), var(--accent-secondary));
    border-radius: 2px;
}

/* ── Loading Spinner ── */
.spinner {
    width: 36px; height: 36px;
    border: 3px solid rgba(59, 130, 246, 0.12);
    border-top-color: var(--accent-primary);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
    margin: 0 auto 14px;
}

.loading-text {
    font-size: 13px;
    color: var(--text-muted);
    letter-spacing: 0.02em;
}

/* ── Status Colors ── */
.status-ok { color: var(--accent-green); }
.status-error { color: var(--accent-red); }
.status-warn { color: var(--accent-amber); }
.status-loading { color: var(--text-muted); }

/* ── Utility ── */
.hidden { display: none !important; }

/* ── Top User Bar (index page) ── */
.btn-history-link, .btn-admin-link, .btn-logout-top {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 34px;
    padding: 6px 16px;
    border-radius: 8px;
    font-size: 13px;
    cursor: pointer;
    transition: all 0.18s;
    text-decoration: none;
    border: 1px solid;
    font-weight: 500;
    line-height: 1;
}

.btn-history-link {
    background: rgba(16, 185, 129, 0.06);
    border-color: rgba(16, 185, 129, 0.2);
    color: var(--accent-green);
}
.btn-history-link:hover { background: rgba(16, 185, 129, 0.12); }

.btn-admin-link {
    background: rgba(139, 92, 246, 0.06);
    border-color: rgba(139, 92, 246, 0.2);
    color: var(--accent-secondary);
}
.btn-admin-link:hover { background: rgba(139, 92, 246, 0.12); }

.btn-logout-top {
    background: rgba(239, 68, 68, 0.05);
    border-color: rgba(239, 68, 68, 0.15);
    color: var(--accent-red);
}
.btn-logout-top:hover { background: rgba(239, 68, 68, 0.1); }

/* ── Rendered Content: Code, LaTeX, Markdown ── */

/* Inline code */
.rendered-content code,
[id] code:not(pre code) {
    font-family: 'JetBrains Mono', 'Fira Code', 'Cascadia Code', monospace;
    font-size: 0.88em;
    background: rgba(59, 130, 246, 0.08);
    border: 1px solid rgba(59, 130, 246, 0.15);
    border-radius: 4px;
    padding: 1px 5px;
    color: #93c5fd;
}

/* Code blocks */
pre {
    background: #1a1d2e !important;
    border: 1px solid rgba(255, 255, 255, 0.06);
    border-radius: 8px;
    padding: 14px 16px;
    overflow-x: auto;
    margin: 10px 0;
    max-width: 100%;
}

pre code {
    background: transparent !important;
    border: none !important;
    padding: 0 !important;
    font-size: 13px;
    line-height: 1.6;
    color: #e2e8f0;
    font-family: 'JetBrains Mono', 'Fira Code', 'Cascadia Code', monospace;
}

/* KaTeX display mode */
.katex-display {
    overflow-x: auto;
    overflow-y: hidden;
    padding: 6px 0;
    margin: 8px 0;
}

/* KaTeX error fallback */
.katex-error,
.latex-fallback {
    font-family: monospace;
    font-size: 0.9em;
    color: var(--accent-amber);
    background: rgba(245, 158, 11, 0.08);
    border-radius: 4px;
    padding: 1px 5px;
}

/* Prose content (AI advice, explanations with Markdown) */
.prose p { margin: 0 0 10px; line-height: 1.7; }
.prose p:last-child { margin-bottom: 0; }
.prose ul, .prose ol { padding-left: 20px; margin: 8px 0; }
.prose li { margin-bottom: 4px; line-height: 1.6; }
.prose h1, .prose h2, .prose h3 {
    color: var(--text-primary);
    font-weight: 600;
    margin: 16px 0 8px;
    line-height: 1.4;
}
.prose h1 { font-size: 18px; }
.prose h2 { font-size: 16px; }
.prose h3 { font-size: 14px; }
.prose strong { color: var(--text-primary); font-weight: 600; }
.prose em { color: var(--text-secondary); font-style: italic; }
.prose blockquote {
    border-left: 3px solid rgba(59, 130, 246, 0.4);
    padding-left: 12px;
    margin: 8px 0;
    color: var(--text-secondary);
    font-style: italic;
}