:root {
    --bg: #0d1117;
    --panel: #161b22;
    --panel-soft: #1f2732;
    --text: #e6edf3;
    --muted: #94a3b8;
    --accent: #7dd3fc;
    --accent-strong: #38bdf8;
    --border: rgba(148, 163, 184, 0.18);
}

html {
    font-size: 16px;
}

body {
    background: radial-gradient(circle at top, #172033 0%, var(--bg) 55%);
    color: var(--text);
    min-height: 100vh;
    font-family: Inter, "Segoe UI", sans-serif;
}

.shell {
    max-width: 1180px;
    margin: 0 auto;
    padding: 24px;
}

.topbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    flex-wrap: wrap;
    margin-bottom: 32px;
}

.brand-link,
.main-nav a,
.auth-links a,
.auth-links button {
    color: var(--text);
    text-decoration: none;
}

.brand-link {
    font-weight: 700;
    letter-spacing: 0.08em;
}

.main-nav,
.topbar-actions,
.auth-links,
.language-switcher {
    display: flex;
    align-items: center;
    gap: 12px;
    flex-wrap: wrap;
}

.lang-button,
.option-button,
.btn {
    border-radius: 14px;
}

.lang-button {
    background: transparent;
    border: 1px solid var(--border);
    color: var(--text);
    padding: 8px 12px;
}

.page-shell {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.footer-bar {
    margin-top: 24px;
    padding: 12px 4px;
    display: flex;
    justify-content: flex-end;
}

.footer-bar a {
    color: var(--muted);
    text-decoration: none;
}

.hero-shell {
    display: flex;
    flex-wrap: wrap;
    gap: 20px;
    align-items: stretch;
}

.hero-copy,
.hero-panel,
.panel-card,
.pattern-card,
.auth-card {
    background: rgba(22, 27, 34, 0.92);
    border: 1px solid var(--border);
    border-radius: 24px;
    padding: 28px;
    box-shadow: 0 18px 48px rgba(0, 0, 0, 0.22);
}

.hero-copy,
.hero-panel {
    flex: 1 1 320px;
}

.hero-panel {
    display: flex;
    flex-direction: column;
    justify-content: center;
    background: linear-gradient(180deg, rgba(56, 189, 248, 0.18), rgba(22, 27, 34, 0.92));
}

.eyebrow {
    color: var(--accent);
    text-transform: uppercase;
    letter-spacing: 0.12em;
    font-size: 0.8rem;
}

h1,
h2,
h3,
p {
    margin-top: 0;
}

.hero-copy h1 {
    font-size: clamp(2.4rem, 5vw, 4.2rem);
    line-height: 1.02;
    margin: 16px 0;
}

.lead,
.panel-card p,
.pattern-card p,
.auth-card p {
    color: var(--muted);
}

.hero-actions,
.detail-grid,
.feature-grid {
    margin-top: 24px;
}

.hero-actions,
.detail-grid,
.feature-grid,
.pattern-grid {
    display: flex;
    flex-wrap: wrap;
    gap: 20px;
}

.feature-grid,
.pattern-grid,
.detail-grid {
    align-items: stretch;
}

.feature-card,
.context-item {
    background: rgba(31, 39, 50, 0.88);
    border: 1px solid var(--border);
    border-radius: 20px;
    padding: 20px;
}

.feature-card,
.pattern-card,
.context-item,
.trace-item,
.panel-card {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.feature-card,
.pattern-card,
.detail-grid > *,
.feature-grid > *,
.pattern-grid > * {
    flex: 1 1 280px;
    min-width: 0;
}

.page-header-block {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: 18px;
    flex-wrap: wrap;
}

.metric-chip,
.feedback-banner,
.welcome-chip {
    background: rgba(56, 189, 248, 0.14);
    color: var(--text);
    border: 1px solid rgba(125, 211, 252, 0.3);
    border-radius: 999px;
    padding: 10px 14px;
}

.metric-chip {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.scenario-card {
    display: flex;
    flex-direction: column;
    gap: 18px;
}

.scenario-meta,
.pattern-card-top,
.pattern-card-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    color: var(--muted);
    font-size: 0.95rem;
}

.scenario-trigger {
    color: var(--accent);
}

.scenario-body {
    font-size: 1.08rem;
    line-height: 1.65;
}

.scenario-options,
.context-list {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.decision-trace-list,
.stacked-form {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.trace-item {
    background: rgba(31, 39, 50, 0.88);
    border: 1px solid var(--border);
    border-radius: 20px;
    padding: 20px;
}

.trace-item-top {
    display: flex;
    justify-content: space-between;
    gap: 12px;
    flex-wrap: wrap;
    margin-bottom: 12px;
}

.trace-area {
    background: rgba(125, 211, 252, 0.12);
    border: 1px solid rgba(125, 211, 252, 0.28);
    color: var(--accent);
    border-radius: 999px;
    padding: 6px 10px;
    font-size: 0.86rem;
}

.option-button {
    width: 100%;
    text-align: left;
    padding: 18px 20px;
    background: rgba(31, 39, 50, 0.92);
    color: var(--text);
    border: 1px solid var(--border);
    transition: transform 0.15s ease, border-color 0.15s ease, background 0.15s ease;
}

.option-button:hover,
.lang-button:hover,
.btn:hover {
    transform: translateY(-1px);
    border-color: rgba(125, 211, 252, 0.6);
}

.btn-primary {
    background: var(--accent-strong);
    border-color: var(--accent-strong);
    color: #06131d;
}

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

.auth-card {
    max-width: 520px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.form-stack {
    display: flex;
    flex-direction: column;
    gap: 8px;
    margin-bottom: 16px;
}

.form-control,
.form-select {
    background: rgba(13, 17, 23, 0.9);
    border: 1px solid var(--border);
    color: var(--text);
    border-radius: 14px;
    padding: 12px 14px;
}

.form-control:focus,
.form-select:focus {
    background: rgba(13, 17, 23, 1);
    color: var(--text);
    border-color: var(--accent-strong);
    box-shadow: 0 0 0 0.2rem rgba(56, 189, 248, 0.18);
}

.compact-check {
    margin-bottom: 16px;
}

.auth-footer {
    margin-bottom: 0;
}

.accent-card {
    border-color: rgba(125, 211, 252, 0.35);
}

.table-shell {
    overflow-x: auto;
}

.admin-table {
    width: 100%;
    border-collapse: collapse;
}

.admin-table th,
.admin-table td {
    padding: 14px 12px;
    border-bottom: 1px solid var(--border);
    text-align: left;
    vertical-align: top;
}

.admin-table th {
    color: var(--muted);
    font-weight: 600;
}

.admin-stat-grid .pattern-card h2 {
    font-size: 2rem;
    margin-bottom: 8px;
}

.compact-context-list {
    margin: 16px 0;
}

.support-copy {
    color: var(--muted);
    margin-bottom: 0;
}

.session-stage-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 16px;
}

.stage-card {
    background: rgba(22, 27, 34, 0.72);
    border: 1px solid var(--border);
    border-radius: 20px;
    padding: 20px;
}

.stage-active {
    border-color: rgba(125, 211, 252, 0.5);
    box-shadow: 0 0 0 1px rgba(125, 211, 252, 0.2) inset;
}

.stage-complete {
    background: rgba(31, 39, 50, 0.92);
}

.session-layout {
    align-items: stretch;
}

.scenario-image {
    width: 100%;
    max-height: 280px;
    object-fit: cover;
    border-radius: 20px;
    border: 1px solid var(--border);
}

.scenario-image-placeholder {
    min-height: 220px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(180deg, rgba(56, 189, 248, 0.12), rgba(13, 17, 23, 0.7));
    color: var(--muted);
}

.muted-stage-card {
    background: rgba(22, 27, 34, 0.72);
}

.option-row {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 14px;
    border-radius: 16px;
    border: 1px solid var(--border);
    background: rgba(255, 255, 255, 0.02);
}

.option-row input {
    margin: 0;
}

.micro-program {
    margin-top: 16px;
    padding: 14px 16px;
    border-radius: 18px;
    border: 1px solid var(--border);
    background: rgba(255, 255, 255, 0.03);
}

.info-grid > * {
    flex: 1 1 320px;
}

@media (max-width: 900px) {
    .topbar {
        flex-direction: column;
        align-items: flex-start;
    }

    .main-nav,
    .topbar-actions {
        width: 100%;
    }

    .topbar-actions {
        justify-content: space-between;
    }

    .hero-copy,
    .hero-panel,
    .feature-grid > *,
    .pattern-grid > *,
    .detail-grid > *,
    .session-stage-grid {
        flex-basis: 100%;
    }

    .session-stage-grid {
        grid-template-columns: 1fr;
    }
}