:root {
    --bg: #07111f;
    --panel: #0f1b2d;
    --panel-soft: #12223a;
    --card: #101c31;
    --border: #223553;
    --text: #e7eefc;
    --muted: #a7b6d2;
    --primary: #5aa9ff;
    --primary-strong: #2d7ff9;
    --good: #2ecc71;
    --warn: #f5b942;
    --bad: #ef5350;
    --shadow: 0 18px 48px rgba(0, 0, 0, 0.28);
    --radius: 18px;
}

* {
    box-sizing: border-box;
}

html, body {
    margin: 0;
    padding: 0;
    background:
        radial-gradient(circle at top left, rgba(90, 169, 255, 0.12), transparent 28%),
        radial-gradient(circle at top right, rgba(46, 204, 113, 0.08), transparent 20%),
        var(--bg);
    color: var(--text);
    font-family: Inter, "Segoe UI", system-ui, sans-serif;
}

body {
    min-height: 100vh;
}

.page-shell {
    width: min(1520px, calc(100vw - 32px));
    margin: 0 auto;
    padding: 24px 0 40px;
}

.hero {
    display: grid;
    grid-template-columns: minmax(0, 1.6fr) minmax(280px, 0.9fr);
    gap: 20px;
    margin-bottom: 20px;
}

.hero-copy,
.card,
.panel {
    background: rgba(15, 27, 45, 0.92);
    border: 1px solid rgba(255, 255, 255, 0.06);
    box-shadow: var(--shadow);
    border-radius: var(--radius);
}

.hero-copy {
    padding: 28px;
}

.eyebrow {
    margin: 0 0 10px;
    text-transform: uppercase;
    letter-spacing: 0.12em;
    color: var(--primary);
    font-size: 12px;
    font-weight: 700;
}

h1 {
    margin: 0 0 12px;
    font-size: clamp(30px, 4vw, 46px);
    line-height: 1.08;
}

.hero-subtitle {
    margin: 0;
    max-width: 780px;
    color: var(--muted);
    line-height: 1.7;
    font-size: 16px;
}

.hero-note {
    padding: 24px;
}

.hero-note h2,
.section-head h2,
.tab-panel h3 {
    margin: 0;
    font-size: 18px;
}

.hero-note p,
.section-intro,
.modal-tip p,
.tab-panel p,
.experiment-list li,
.explain-list li,
.insight-card p {
    color: var(--muted);
    line-height: 1.65;
}

.workspace-grid {
    display: grid;
    grid-template-columns: 330px minmax(0, 1fr) 340px;
    gap: 20px;
    align-items: start;
}

.panel {
    background: transparent;
    border: none;
    box-shadow: none;
    display: grid;
    gap: 20px;
}

.card {
    padding: 18px;
}

.section-head {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    margin-bottom: 14px;
}

.btn,
.icon-btn {
    border: 1px solid var(--border);
    background: var(--panel-soft);
    color: var(--text);
    border-radius: 12px;
    padding: 10px 14px;
    cursor: pointer;
    transition: transform 0.16s ease, background 0.16s ease, border-color 0.16s ease;
    font: inherit;
}

.btn:hover,
.icon-btn:hover {
    transform: translateY(-1px);
    border-color: rgba(90, 169, 255, 0.5);
}

.btn-primary {
    background: linear-gradient(180deg, #4c95ff, #2d7ff9);
    border-color: #3886ff;
}

.btn-secondary {
    background: #132540;
}

.btn-danger {
    background: rgba(239, 83, 80, 0.12);
    border-color: rgba(239, 83, 80, 0.36);
    color: #ffb4b1;
}

.preset-grid,
.control-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 10px;
    margin-bottom: 14px;
}

.preset-grid .btn:first-child {
    grid-column: 1 / -1;
}

.axiom-list,
.rule-list,
.timeline,
.pending-list,
.insight-list {
    display: grid;
    gap: 12px;
}

.axiom-card,
.rule-card,
.timeline-card,
.pending-card,
.insight-card {
    padding: 14px;
    border-radius: 14px;
    border: 1px solid var(--border);
    background: rgba(9, 18, 31, 0.72);
}

.axiom-card-header,
.timeline-card-header {
    display: flex;
    justify-content: space-between;
    align-items: start;
    gap: 12px;
    margin-bottom: 10px;
}

.axiom-name,
.timeline-formula,
.pending-formula {
    font-weight: 700;
    letter-spacing: 0.01em;
}

.formula {
    display: inline-block;
    font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
    background: rgba(90, 169, 255, 0.12);
    border: 1px solid rgba(90, 169, 255, 0.2);
    border-radius: 10px;
    padding: 8px 10px;
    margin: 8px 0;
    white-space: pre-wrap;
    word-break: break-word;
}

.tag-row {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-top: 10px;
}

.tag,
.badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    border-radius: 999px;
    padding: 5px 9px;
    font-size: 12px;
    font-weight: 700;
    letter-spacing: 0.02em;
}

.tag {
    background: rgba(255, 255, 255, 0.06);
    color: var(--muted);
}

.tag-good,
.status-good,
.consistency-banner.is-good strong {
    color: #9af0be;
}

.tag-bad,
.status-bad,
.consistency-banner.is-bad strong {
    color: #ffb4b1;
}

.tag-neutral {
    color: #c7d2e8;
}

.badge {
    background: rgba(90, 169, 255, 0.16);
    color: var(--primary);
}

.range-row {
    display: grid;
    grid-template-columns: 1fr 1.2fr auto;
    align-items: center;
    gap: 10px;
    color: var(--muted);
}

input,
select {
    width: 100%;
    border-radius: 12px;
    border: 1px solid var(--border);
    background: #0b1526;
    color: var(--text);
    padding: 10px 12px;
    font: inherit;
}

input[type="range"] {
    padding: 0;
}

.summary-card {
    padding: 16px;
}

.summary-grid {
    display: grid;
    grid-template-columns: repeat(5, minmax(0, 1fr));
    gap: 12px;
}

.summary-item {
    padding: 12px;
    border-radius: 14px;
    background: rgba(9, 18, 31, 0.7);
    border: 1px solid var(--border);
}

.summary-label {
    display: block;
    margin-bottom: 6px;
    font-size: 12px;
    color: var(--muted);
    text-transform: uppercase;
    letter-spacing: 0.06em;
}

.summary-item strong {
    font-size: 22px;
}

.timeline-card {
    position: relative;
}

.timeline-card::before {
    content: "";
    position: absolute;
    left: -9px;
    top: 22px;
    width: 10px;
    height: 10px;
    background: var(--primary);
    border-radius: 50%;
    box-shadow: 0 0 0 4px rgba(90, 169, 255, 0.14);
}

.timeline {
    position: relative;
    padding-left: 16px;
}

.timeline::before {
    content: "";
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 2px;
    background: linear-gradient(to bottom, rgba(90, 169, 255, 0.45), rgba(90, 169, 255, 0.05));
}

.pending-card {
    display: grid;
    gap: 8px;
}

.pending-meta,
.timeline-meta,
.support-text,
.rule-desc,
.axiom-description {
    color: var(--muted);
    font-size: 14px;
    line-height: 1.6;
}

.explain-list,
.experiment-list {
    padding-left: 18px;
    margin: 0;
}

.help-box {
    margin-top: 14px;
    padding: 12px;
    border-radius: 14px;
    background: rgba(90, 169, 255, 0.08);
    border: 1px solid rgba(90, 169, 255, 0.18);
}

.help-box ul {
    margin: 8px 0 0;
    padding-left: 18px;
    color: var(--muted);
}

.consistency-banner {
    display: flex;
    align-items: start;
    gap: 12px;
    border-radius: 16px;
    padding: 14px;
    border: 1px solid var(--border);
    background: rgba(9, 18, 31, 0.72);
}

.consistency-banner.is-good {
    border-color: rgba(46, 204, 113, 0.28);
}

.consistency-banner.is-bad {
    border-color: rgba(239, 83, 80, 0.36);
}

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

.bottom-tabs {
    margin-top: 20px;
}

.tab-bar {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-bottom: 16px;
}

.tab-btn {
    border: 1px solid var(--border);
    background: rgba(255, 255, 255, 0.03);
    color: var(--muted);
    border-radius: 999px;
    padding: 10px 14px;
    cursor: pointer;
    font: inherit;
}

.tab-btn.active {
    color: var(--text);
    background: rgba(90, 169, 255, 0.18);
    border-color: rgba(90, 169, 255, 0.3);
}

.tab-panel {
    display: none;
}

.tab-panel.active {
    display: block;
}

.modal {
    position: fixed;
    inset: 0;
    background: rgba(3, 8, 18, 0.76);
    display: none;
    align-items: center;
    justify-content: center;
    padding: 20px;
    z-index: 40;
}

.modal.active {
    display: flex;
}

.modal-dialog {
    width: min(560px, 100%);
    background: #0e1728;
    border: 1px solid var(--border);
    border-radius: 20px;
    box-shadow: var(--shadow);
}

.modal-header,
.modal-footer {
    padding: 18px 20px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
}

.modal-body {
    padding: 0 20px 20px;
    display: grid;
    gap: 14px;
}

.field {
    display: grid;
    gap: 8px;
}

.field span {
    color: var(--muted);
    font-size: 14px;
}

.modal-tip {
    padding: 12px;
    border-radius: 14px;
    background: rgba(245, 185, 66, 0.08);
    border: 1px solid rgba(245, 185, 66, 0.2);
}

.icon-btn {
    width: 38px;
    height: 38px;
    border-radius: 999px;
    font-size: 22px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
}

code {
    font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
}

@media (max-width: 1280px) {
    .workspace-grid {
        grid-template-columns: 1fr;
    }

    .summary-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .hero {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 720px) {
    .page-shell {
        width: min(100vw - 20px, 100%);
        padding-top: 12px;
    }

    .hero-copy,
    .card {
        padding: 16px;
    }

    .summary-grid,
    .preset-grid,
    .control-grid {
        grid-template-columns: 1fr;
    }

    .range-row {
        grid-template-columns: 1fr;
    }
}