:root {
    --bg: #f4f6f8;
    --surface: #ffffff;
    --surface-soft: #f8fafb;
    --ink: #18202a;
    --muted: #667085;
    --line: #d9e0e7;
    --accent: #0f766e;
    --accent-dark: #115e59;
    --accent-soft: #dff7f2;
    --warning: #b7791f;
    --warning-soft: #fff4d6;
    --danger: #b42318;
    --danger-soft: #fee4e2;
    --sponsor: #3956a3;
    --sponsor-soft: #e8edff;
    --shadow: 0 10px 30px rgba(0, 0, 0, 0.08);
    --radius: 8px;
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    min-height: 100vh;
    background: var(--bg);
    color: var(--ink);
    font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

button,
input,
textarea {
    font: inherit;
}

button {
    cursor: pointer;
}

.app-shell {
    display: grid;
    grid-template-columns: minmax(320px, 0.85fr) minmax(420px, 1.15fr);
    gap: 24px;
    width: min(1180px, calc(100% - 32px));
    min-height: calc(100vh - 32px);
    margin: 16px auto;
}

.hero-panel,
.results-panel {
    background: var(--surface);
    border: 1px solid var(--line);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
}

.hero-panel {
    display: flex;
    flex-direction: column;
    justify-content: flex-start;
    gap: 12px;
    padding: 28px;
    align-self: start;
    position: sticky;
    top: 16px;
    background:
        linear-gradient(180deg, rgba(15, 118, 110, 0.08), rgba(255, 255, 255, 0) 42%),
        var(--surface);
}

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

.brand-mark {
    display: grid;
    place-items: center;
    width: 48px;
    height: 48px;
    border-radius: var(--radius);
    overflow: hidden;
}

.brand-mark img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}

.eyebrow,
.metric-label {
    display: block;
    margin: 0 0 4px;
    color: var(--muted);
    font-size: 12px;
    font-weight: 700;
    letter-spacing: 0;
    text-transform: uppercase;
}

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

h1 {
    margin-bottom: 0;
    font-size: clamp(28px, 4vw, 46px);
    line-height: 1.02;
    letter-spacing: 0;
}

h2 {
    margin-bottom: 0;
    font-size: 22px;
    line-height: 1.2;
    letter-spacing: 0;
}

.hero-copy {
    margin: 20px 0 10px;
}

.hero-copy p {
    max-width: 520px;
    margin-bottom: 8px;
    color: #344054;
    font-size: 18px;
    line-height: 1.55;
}

.hero-extra {
    display: grid;
    gap: 16px;
    padding: 0 0 24px;
    animation: fadeInUp 0.6s ease forwards;
}

.extra-card {
    display: flex;
    gap: 12px;
    padding: 14px;
    background: rgba(255, 255, 255, 0.5);
    border: 1px solid var(--line);
    border-radius: var(--radius);
}

.extra-card.pink-bg {
    background: #fff5f7;
    border-color: #ffdce5;
}

.extra-card.cyan-bg {
    background: #f0fdfa;
    border-color: #ccfbf1;
}

.extra-icon {
    font-size: 20px;
    flex-shrink: 0;
}

.extra-card strong {
    display: block;
    font-size: 14px;
    margin-bottom: 2px;
}

.extra-card p {
    margin: 0;
    font-size: 13px;
    color: var(--muted);
}

.hero-illustration {
    width: 100%;
    height: 120px;
    object-fit: cover;
    border-radius: var(--radius);
    opacity: 0.8;
    border: 1px solid var(--line);
}

.trust-strip {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.trust-strip span,
.quick-filters button,
.confidence-badge,
.source-pill,
.sponsor-chip {
    border-radius: 999px;
    white-space: nowrap;
}

.trust-strip span {
    border: 1px solid var(--line);
    background: var(--surface-soft);
    padding: 7px 10px;
    color: #344054;
    font-size: 13px;
    font-weight: 700;
}

.search-panel {
    display: grid;
    gap: 10px;
    padding: 18px;
    border: 1px solid var(--line);
    border-radius: var(--radius);
    background: var(--surface-soft);
}

label {
    color: #344054;
    font-size: 13px;
    font-weight: 800;
}

.input-row {
    display: grid;
    grid-template-columns: 1fr auto;
    gap: 8px;
}

input {
    width: 100%;
    min-width: 0;
    border: 1px solid var(--line);
    border-radius: var(--radius);
    background: #fff;
    padding: 12px 13px;
    color: var(--ink);
    outline: none;
}

input:focus {
    border-color: var(--accent);
    box-shadow: 0 0 0 3px rgba(15, 118, 110, 0.13);
}

.primary-button,
.ghost-button,
.icon-button,
.btn-action,
.btn-fb {
    min-height: 42px;
    border: 1px solid transparent;
    border-radius: var(--radius);
    font-weight: 800;
}

.primary-button {
    background: var(--accent);
    color: #fff;
    padding: 0 18px;
}

.primary-button:hover {
    background: var(--accent-dark);
}

.ghost-button,
.quick-filters button,
.btn-action,
.btn-fb {
    border-color: var(--line);
    background: #fff;
    color: #344054;
}

.ghost-button {
    padding: 0 14px;
}

.quick-filters {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    padding-top: 4px;
}

.quick-filters button {
    min-height: 34px;
    padding: 0 12px;
    font-size: 13px;
    font-weight: 800;
}

.results-panel {
    display: flex;
    flex-direction: column;
    min-width: 0;
    padding: 20px;
}

.status-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 10px;
    margin-bottom: 18px;
}

.status-grid > div {
    min-width: 0;
    border: 1px solid var(--line);
    border-radius: var(--radius);
    background: var(--surface-soft);
    padding: 12px;
}

.status-grid strong {
    display: block;
    overflow-wrap: anywhere;
    font-size: 14px;
}

.loading,
.empty-state {
    display: grid;
    place-items: center;
    min-height: 360px;
    border: 1px dashed var(--line);
    border-radius: var(--radius);
    text-align: center;
}

.loading[hidden],
.empty-state[hidden],
#resultsArea[hidden],
.trace-body[hidden] {
    display: none;
}

.loading p,
.empty-state p {
    max-width: 380px;
    color: var(--muted);
}

.spinner {
    width: 38px;
    height: 38px;
    border: 4px solid #d7eeeb;
    border-top-color: var(--accent);
    border-radius: 50%;
    animation: spin 0.85s linear infinite;
}

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

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

.trace-viewer {
    margin-bottom: 16px;
    border: 1px solid #203040;
    border-radius: var(--radius);
    background: #111827;
    color: #d1fae5;
    overflow: hidden;
}

.trace-summary {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    padding: 12px 14px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.12);
}

.trace-summary span {
    color: #9ca3af;
    font-size: 13px;
    font-weight: 700;
}

.trace-body {
    padding: 8px 14px 14px;
}

.trace-step {
    display: grid;
    grid-template-columns: 34px 1fr;
    gap: 10px;
    padding: 10px 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.trace-step:last-child {
    border-bottom: 0;
}

.trace-index {
    display: grid;
    place-items: center;
    width: 28px;
    height: 28px;
    border-radius: 50%;
    background: rgba(20, 184, 166, 0.18);
    color: #99f6e4;
    font-size: 12px;
    font-weight: 900;
}

.trace-label {
    display: block;
    margin-bottom: 3px;
    color: #facc15;
    font-size: 12px;
    font-weight: 900;
    text-transform: uppercase;
}

.trace-text {
    margin: 0;
    color: #dbeafe;
    line-height: 1.45;
}

.suggestions-list {
    display: grid;
    gap: 14px;
}

.suggestion-card {
    border: 1px solid var(--line);
    border-radius: 12px;
    background: #fff;
    overflow: hidden;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
    animation: fadeInUp 0.4s ease forwards;
}

.suggestion-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 24px rgba(0,0,0,0.1);
}

.card-media {
    width: 100%;
    height: 160px;
    object-fit: cover;
    background: #f0f2f5;
    border-bottom: 1px solid var(--line);
}

.card-header {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 12px;
    padding: 16px 16px 10px;
}

.card-title {
    margin: 0 0 5px;
    font-size: 18px;
    line-height: 1.25;
}

.vendor-line {
    margin: 0;
    color: var(--muted);
    font-size: 13px;
    font-weight: 700;
}

.sponsor-chip {
    flex: 0 0 auto;
    background: var(--sponsor-soft);
    color: var(--sponsor);
    padding: 6px 9px;
    font-size: 12px;
    font-weight: 900;
}

.card-body {
    display: grid;
    gap: 10px;
    padding: 0 16px 16px;
}

.fact-row {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.fact {
    border: 1px solid var(--line);
    border-radius: var(--radius);
    padding: 9px 10px;
    background: var(--surface-soft);
    color: #344054;
    font-size: 14px;
    font-weight: 800;
}

.confidence-badge {
    display: inline-flex;
    align-items: center;
    min-height: 34px;
    padding: 0 11px;
    font-size: 13px;
    font-weight: 900;
}

.badge-high {
    background: var(--accent-soft);
    color: var(--accent-dark);
}

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

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

.rationale {
    margin: 0;
    color: #344054;
    line-height: 1.5;
}

.source-row,
.card-actions,
.feedback-buttons {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.source-pill {
    border: 1px solid var(--line);
    padding: 7px 10px;
    color: #344054;
    text-decoration: none;
    font-size: 13px;
    font-weight: 800;
}

.source-pill:hover,
.btn-action:hover,
.ghost-button:hover,
.quick-filters button:hover {
    border-color: var(--accent);
    color: var(--accent-dark);
}

.btn-action {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 116px;
    padding: 0 12px;
    text-decoration: none;
}

.btn-action.primary {
    border-color: var(--accent);
    background: var(--accent);
    color: #fff;
}

.feedback-widget {
    margin-top: 4px;
    padding: 12px;
    border: 1px dashed #cbd5e1;
    border-radius: var(--radius);
    background: var(--surface-soft);
}

.feedback-title {
    margin: 0 0 8px;
    color: #344054;
    font-size: 13px;
    font-weight: 800;
}

.stars {
    display: flex;
    gap: 4px;
    margin-bottom: 8px;
}

.star {
    border: 0;
    background: transparent;
    color: #98a2b3;
    font-size: 22px;
    line-height: 1;
    padding: 0 2px;
}

.star.active,
.star:hover {
    color: #d99a16;
}

.feedback-input {
    width: 100%;
    min-height: 66px;
    resize: vertical;
    border: 1px solid var(--line);
    border-radius: var(--radius);
    padding: 9px 10px;
    outline: none;
}

.btn-fb {
    min-height: 34px;
    padding: 0 12px;
    font-size: 13px;
}

.btn-fb-submit {
    border-color: var(--accent);
    background: var(--accent);
    color: #fff;
}

.notice {
    border-radius: var(--radius);
    padding: 12px;
    background: var(--accent-soft);
    color: var(--accent-dark);
    font-weight: 800;
}

.notice.warn {
    background: var(--danger-soft);
    color: var(--danger);
}

@media (max-width: 900px) {
    .app-shell {
        grid-template-columns: 1fr;
        width: min(100% - 20px, 680px);
        margin: 10px auto;
    }

    .hero-copy {
        margin: 34px 0 24px;
    }
}

@media (max-width: 560px) {
    .hero-panel,
    .results-panel {
        padding: 16px;
    }

    .input-row,
    .status-grid {
        grid-template-columns: 1fr;
    }

    .primary-button {
        width: 100%;
        min-height: 46px;
    }

    .section-heading,
    .card-header {
        align-items: stretch;
        flex-direction: column;
    }

    .ghost-button,
    .btn-action {
        width: 100%;
    }

    .card-actions {
        display: grid;
        grid-template-columns: 1fr;
    }
}

@keyframes fadeInUp {
    from { opacity: 0; transform: translateY(15px); }
    to { opacity: 1; transform: translateY(0); }
}