/* ═══════════════════════════════════════════════════════════════
   Multi-Agent Research Assistant — Stylesheet
   Dark glassmorphism design with vibrant accents
   ═══════════════════════════════════════════════════════════════ */

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

:root {
    --bg-primary: #0a0a0f;
    --bg-secondary: #12121a;
    --bg-card: rgba(20, 20, 35, 0.7);
    --bg-card-hover: rgba(30, 30, 50, 0.8);
    --border-glass: rgba(255, 255, 255, 0.06);
    --border-accent: rgba(99, 102, 241, 0.3);

    --text-primary: #e4e4ed;
    --text-secondary: #9898b0;
    --text-muted: #5e5e76;

    --accent: #818cf8;
    --accent-glow: rgba(129, 140, 248, 0.25);
    --accent-bright: #a5b4fc;
    --success: #34d399;
    --error: #f87171;
    --warning: #fbbf24;

    --font-body: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-mono: 'JetBrains Mono', 'Fira Code', monospace;

    --radius-sm: 8px;
    --radius-md: 14px;
    --radius-lg: 20px;

    --shadow-glow: 0 0 40px rgba(129, 140, 248, 0.08);
    --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.3);

    --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

body {
    font-family: var(--font-body);
    background: var(--bg-primary);
    color: var(--text-primary);
    min-height: 100vh;
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    overflow-x: hidden;
}

/* Subtle grid background */
body::before {
    content: '';
    position: fixed;
    inset: 0;
    background:
        radial-gradient(ellipse at 20% 20%, rgba(129, 140, 248, 0.04) 0%, transparent 50%),
        radial-gradient(ellipse at 80% 80%, rgba(99, 102, 241, 0.03) 0%, transparent 50%);
    pointer-events: none;
    z-index: 0;
}

.app {
    position: relative;
    z-index: 1;
    max-width: 880px;
    margin: 0 auto;
    padding: 24px 20px 60px;
}

/* ── Glass Card ────────────────────────────────────────────── */
.glass-card {
    background: var(--bg-card);
    border: 1px solid var(--border-glass);
    border-radius: var(--radius-lg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    box-shadow: var(--shadow-card);
    padding: 32px;
    transition: var(--transition);
}

.glass-card:hover {
    border-color: var(--border-accent);
    box-shadow: var(--shadow-card), var(--shadow-glow);
}

/* ── Header ────────────────────────────────────────────────── */
.header {
    padding: 16px 0 32px;
}

.header__brand {
    display: flex;
    align-items: center;
    gap: 16px;
}

.header__icon {
    font-size: 32px;
    width: 56px;
    height: 56px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, rgba(129, 140, 248, 0.15), rgba(99, 102, 241, 0.05));
    border: 1px solid var(--border-accent);
    border-radius: var(--radius-md);
}

.header__title {
    font-size: 22px;
    font-weight: 700;
    letter-spacing: -0.02em;
    background: linear-gradient(135deg, var(--text-primary), var(--accent-bright));
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

.header__subtitle {
    font-size: 13px;
    color: var(--text-muted);
    font-weight: 400;
    letter-spacing: 0.03em;
}

/* ── Section ───────────────────────────────────────────────── */
.section {
    margin-bottom: 24px;
    animation: fadeUp 0.5s ease both;
}

.hidden {
    display: none !important;
}

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

/* ── Input Section ─────────────────────────────────────────── */
.input-card__title {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 20px;
    color: var(--text-primary);
}

.input-group {
    margin-bottom: 20px;
}

.input-field {
    width: 100%;
    padding: 16px 20px;
    font-size: 16px;
    font-family: var(--font-body);
    color: var(--text-primary);
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid var(--border-glass);
    border-radius: var(--radius-md);
    outline: none;
    transition: var(--transition);
}

.input-field::placeholder {
    color: var(--text-muted);
}

.input-field:focus {
    border-color: var(--accent);
    box-shadow: 0 0 0 3px var(--accent-glow);
    background: rgba(255, 255, 255, 0.06);
}

.input-field.shake {
    animation: shake 0.5s ease;
}

@keyframes shake {
    0%, 100% { transform: translateX(0); }
    20%, 60% { transform: translateX(-8px); }
    40%, 80% { transform: translateX(8px); }
}

/* ── Controls ──────────────────────────────────────────────── */
.controls {
    display: flex;
    align-items: center;
    gap: 16px;
    flex-wrap: wrap;
}

.depth-toggle {
    display: flex;
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid var(--border-glass);
    border-radius: var(--radius-sm);
    overflow: hidden;
}

.depth-btn {
    padding: 10px 18px;
    font-size: 14px;
    font-family: var(--font-body);
    font-weight: 500;
    color: var(--text-secondary);
    background: transparent;
    border: none;
    cursor: pointer;
    transition: var(--transition);
}

.depth-btn:hover {
    color: var(--text-primary);
    background: rgba(255, 255, 255, 0.04);
}

.depth-btn.active {
    color: var(--accent-bright);
    background: rgba(129, 140, 248, 0.12);
}

.primary-btn {
    padding: 12px 28px;
    font-size: 15px;
    font-family: var(--font-body);
    font-weight: 600;
    color: #fff;
    background: linear-gradient(135deg, #6366f1, #818cf8);
    border: none;
    border-radius: var(--radius-sm);
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 8px;
    transition: var(--transition);
    margin-left: auto;
}

.primary-btn:hover:not(:disabled) {
    transform: translateY(-1px);
    box-shadow: 0 6px 24px rgba(99, 102, 241, 0.35);
}

.primary-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.btn-arrow {
    transition: transform 0.2s ease;
}

.primary-btn:hover .btn-arrow {
    transform: translateX(4px);
}

.secondary-btn {
    padding: 10px 20px;
    font-size: 14px;
    font-family: var(--font-body);
    font-weight: 500;
    color: var(--text-secondary);
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid var(--border-glass);
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: var(--transition);
}

.secondary-btn:hover {
    color: var(--text-primary);
    background: rgba(255, 255, 255, 0.08);
    border-color: var(--border-accent);
}

.depth-hint {
    margin-top: 12px;
    font-size: 13px;
    color: var(--text-muted);
}

.spinner {
    display: inline-block;
    width: 16px;
    height: 16px;
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-top-color: #fff;
    border-radius: 50%;
    animation: spin 0.6s linear infinite;
}

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

/* ── Progress Section ──────────────────────────────────────── */
.progress-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 20px;
    flex-wrap: wrap;
    gap: 12px;
}

.progress-topic {
    font-size: 17px;
    font-weight: 600;
    color: var(--text-primary);
}

.badge {
    padding: 4px 14px;
    font-size: 12px;
    font-weight: 600;
    font-family: var(--font-mono);
    color: var(--accent-bright);
    background: rgba(129, 140, 248, 0.12);
    border-radius: 100px;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.badge--error {
    color: var(--error);
    background: rgba(248, 113, 113, 0.12);
}

.progress-bar-container {
    width: 100%;
    height: 6px;
    background: rgba(255, 255, 255, 0.06);
    border-radius: 100px;
    overflow: hidden;
    margin-bottom: 16px;
}

.progress-bar {
    height: 100%;
    background: linear-gradient(90deg, #6366f1, #818cf8, #a5b4fc);
    border-radius: 100px;
    transition: width 0.8s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
}

.progress-bar::after {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(
        90deg,
        transparent 0%,
        rgba(255, 255, 255, 0.2) 50%,
        transparent 100%
    );
    animation: shimmer 2s infinite;
}

@keyframes shimmer {
    0%   { transform: translateX(-100%); }
    100% { transform: translateX(100%); }
}

.progress-message {
    font-size: 15px;
    color: var(--text-secondary);
    margin-bottom: 28px;
}

/* ── Pipeline Visualization ────────────────────────────────── */
.pipeline {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0;
    flex-wrap: wrap;
    padding: 8px 0;
}

.pipeline-node {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 6px;
    padding: 12px 14px;
    border-radius: var(--radius-sm);
    transition: var(--transition);
    opacity: 0.35;
}

.pipeline-node.active {
    opacity: 1;
    background: rgba(129, 140, 248, 0.1);
    box-shadow: 0 0 20px var(--accent-glow);
    animation: pulse 2s ease infinite;
}

.pipeline-node.completed {
    opacity: 0.7;
}

.pipeline-node.completed .pipeline-icon::after {
    content: '✓';
    position: absolute;
    bottom: -2px;
    right: -4px;
    font-size: 10px;
    color: var(--success);
}

.pipeline-icon {
    font-size: 22px;
    position: relative;
}

.pipeline-label {
    font-size: 11px;
    font-weight: 500;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.04em;
}

.pipeline-node.active .pipeline-label {
    color: var(--accent-bright);
}

.pipeline-connector {
    width: 24px;
    height: 2px;
    background: var(--border-glass);
    flex-shrink: 0;
}

@keyframes pulse {
    0%, 100% { box-shadow: 0 0 20px var(--accent-glow); }
    50%      { box-shadow: 0 0 30px rgba(129, 140, 248, 0.35); }
}

/* ── Report Section ────────────────────────────────────────── */
.report-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 16px;
    flex-wrap: wrap;
    gap: 12px;
}

.report-meta {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
}

.meta-chip {
    padding: 6px 14px;
    font-size: 12px;
    font-weight: 500;
    color: var(--text-secondary);
    background: var(--bg-card);
    border: 1px solid var(--border-glass);
    border-radius: 100px;
}

.report-actions {
    display: flex;
    gap: 8px;
}

/* ── Markdown Body ─────────────────────────────────────────── */
.report-content {
    font-size: 15px;
    line-height: 1.75;
    color: var(--text-primary);
}

.report-content h1 {
    font-size: 24px;
    font-weight: 700;
    margin: 0 0 8px;
    color: var(--text-primary);
    letter-spacing: -0.02em;
}

.report-content h2 {
    font-size: 19px;
    font-weight: 600;
    margin: 32px 0 12px;
    color: var(--accent-bright);
    padding-bottom: 8px;
    border-bottom: 1px solid var(--border-glass);
}

.report-content h3 {
    font-size: 16px;
    font-weight: 600;
    margin: 24px 0 8px;
    color: var(--text-primary);
}

.report-content p {
    margin-bottom: 14px;
}

.report-content li {
    margin-left: 20px;
    margin-bottom: 6px;
    list-style-type: '—  ';
}

.report-content a {
    color: var(--accent-bright);
    text-decoration: none;
    border-bottom: 1px solid rgba(165, 180, 252, 0.3);
    transition: border-color 0.2s ease;
}

.report-content a:hover {
    border-bottom-color: var(--accent-bright);
}

.report-content code {
    font-family: var(--font-mono);
    font-size: 13px;
    padding: 2px 7px;
    background: rgba(255, 255, 255, 0.06);
    border-radius: 4px;
    color: var(--accent-bright);
}

.report-content hr {
    border: none;
    height: 1px;
    background: var(--border-glass);
    margin: 24px 0;
}

.report-content em {
    color: var(--text-secondary);
}

/* ── Responsive ────────────────────────────────────────────── */
@media (max-width: 640px) {
    .app {
        padding: 16px 12px 40px;
    }

    .glass-card {
        padding: 20px 16px;
    }

    .controls {
        flex-direction: column;
        align-items: stretch;
    }

    .primary-btn {
        margin-left: 0;
        justify-content: center;
    }

    .pipeline {
        gap: 4px;
    }

    .pipeline-connector {
        width: 12px;
    }

    .pipeline-node {
        padding: 8px 6px;
    }

    .pipeline-label {
        font-size: 9px;
    }

    .report-header {
        flex-direction: column;
    }
}