:root {
    --bg: #f5f7fb;
    --panel: #ffffff;
    --border: #dde3ee;
    --text: #1f2937;
    --muted: #667085;
    --primary: #2563eb;
    --primary-dark: #1d4ed8;
    --danger: #dc2626;
    --danger-dark: #b91c1c;
    --success-bg: #ecfdf3;
    --success-border: #86efac;
    --error-bg: #fef2f2;
    --error-border: #fca5a5;
    --shadow: 0 12px 30px rgba(15, 23, 42, 0.08);
    --radius: 16px;
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.45;
}

.container {
    width: min(1080px, calc(100% - 24px));
    margin: 24px auto 48px;
}

.hero {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 16px;
    margin-bottom: 20px;
}

.eyebrow {
    margin: 0 0 6px;
    color: var(--primary);
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    font-size: 0.78rem;
}

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

h1 {
    margin-bottom: 8px;
    font-size: clamp(1.9rem, 4vw, 2.8rem);
}

.subtitle {
    margin-bottom: 0;
    color: var(--muted);
    max-width: 70ch;
}

.panel {
    background: var(--panel);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    padding: 18px;
    margin-bottom: 18px;
}

.alert {
    border-radius: 14px;
    padding: 14px 16px;
    margin-bottom: 18px;
    border: 1px solid transparent;
}

.alert-success {
    background: var(--success-bg);
    border-color: var(--success-border);
}

.alert-error {
    background: var(--error-bg);
    border-color: var(--error-border);
}

.role-badge,
.price-pill {
    display: inline-flex;
    align-items: center;
    border-radius: 999px;
    padding: 8px 12px;
    font-weight: 700;
    white-space: nowrap;
}

.role-admin {
    background: #dbeafe;
    color: #1d4ed8;
}

.role-participant {
    background: #ecfeff;
    color: #0f766e;
}

.role-public {
    background: #f3f4f6;
    color: #374151;
}

.price-pill {
    background: #eff6ff;
    color: #1d4ed8;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 12px;
    margin-bottom: 18px;
}

.stat-card {
    background: var(--panel);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    padding: 16px;
}

.stat-label {
    display: block;
    color: var(--muted);
    margin-bottom: 8px;
    font-size: 0.92rem;
}

.stat-value {
    font-size: 1.45rem;
}

.formula-panel pre {
    overflow: auto;
    background: #f8fafc;
    border: 1px solid var(--border);
    border-radius: 14px;
    padding: 14px;
    font-size: 1rem;
}

.stack-form {
    display: grid;
    gap: 14px;
}

.compact-form {
    gap: 12px;
}

label {
    display: grid;
    gap: 6px;
    font-weight: 600;
}

label span {
    font-size: 0.95rem;
}

input,
textarea,
select,
button {
    font: inherit;
}

input,
textarea,
select {
    width: 100%;
    border: 1px solid #cbd5e1;
    border-radius: 12px;
    padding: 12px 13px;
    background: #fff;
    color: var(--text);
}

textarea {
    resize: vertical;
}

input:focus,
textarea:focus,
select:focus {
    outline: 2px solid rgba(37, 99, 235, 0.2);
    border-color: var(--primary);
}

.checkbox-row {
    display: flex;
    align-items: center;
    gap: 10px;
    font-weight: 500;
}

.checkbox-row input {
    width: auto;
}

.two-columns {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 12px;
}

.btn {
    border: 0;
    border-radius: 12px;
    padding: 12px 16px;
    font-weight: 700;
    cursor: pointer;
    transition: transform 0.04s ease, opacity 0.15s ease;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    justify-content: center;
}

.btn:active {
    transform: translateY(1px);
}

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

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

.btn-secondary {
    background: #e2e8f0;
    color: #1f2937;
}

.btn-danger {
    background: var(--danger);
    color: #fff;
}

.btn-danger:hover {
    background: var(--danger-dark);
}

.form-actions {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
}

.section-head {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 16px;
    margin-bottom: 14px;
}

.card-list {
    display: grid;
    gap: 12px;
}

.item-card {
    border: 1px solid var(--border);
    border-radius: 16px;
    padding: 14px;
    background: #fbfdff;
}

.readonly-card p:last-child {
    margin-bottom: 0;
}

.readonly-head {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 12px;
    margin-bottom: 8px;
}

.readonly-head h3 {
    margin-bottom: 0;
}

.summary-box {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 10px;
    background: #f8fafc;
    border: 1px solid var(--border);
    border-radius: 14px;
    padding: 12px;
}

.summary-box div {
    display: grid;
    gap: 4px;
}

.summary-box span {
    color: var(--muted);
    font-size: 0.88rem;
}

.share-link-row {
    margin-top: 12px;
    display: grid;
    gap: 8px;
}

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

.share-link-actions input {
    flex: 1;
    min-width: 0;
    background: #f8fafc;
}

.inline-details {
    border: 1px dashed #cbd5e1;
    border-radius: 14px;
    padding: 12px;
    margin-top: 16px;
}

.inline-details summary {
    cursor: pointer;
    font-weight: 700;
}

.top-space {
    margin-top: 12px;
}

.empty-state,
.muted {
    color: var(--muted);
}

.results-table-wrapper {
    overflow: auto;
}

.results-table {
    width: 100%;
    border-collapse: collapse;
    min-width: 760px;
}

.results-table th,
.results-table td {
    border-bottom: 1px solid var(--border);
    text-align: left;
    padding: 12px 10px;
    vertical-align: middle;
}

.results-table th {
    font-size: 0.9rem;
    color: var(--muted);
}

.results-table tbody tr:last-child td {
    border-bottom: 0;
}

.balance-cell {
    min-width: 170px;
    vertical-align: middle;
}

.balance-box {
    display: inline-grid;
    gap: 2px;
    padding: 10px 12px;
    border-radius: 12px;
    border: 1px solid transparent;
    min-width: 140px;
    vertical-align: middle;
}

a {
    color: var(--primary-dark);
}

@media (max-width: 900px) {
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 720px) {
    .container {
        width: min(100% - 16px, 1080px);
        margin: 16px auto 32px;
    }

    .hero,
    .section-head,
    .readonly-head,
    .share-link-actions,
    .form-actions {
        flex-direction: column;
        align-items: stretch;
    }

    .stats-grid,
    .two-columns,
    .summary-box {
        grid-template-columns: 1fr;
    }

    .panel,
    .stat-card,
    .item-card {
        padding: 14px;
    }

    .btn {
        width: 100%;
    }
}

.solde-col {
    min-width: 170px;
}

.balance-cell {
    min-width: 170px;
}

.balance-box {
    display: inline-grid;
    gap: 2px;
    padding: 10px 12px;
    border-radius: 12px;
    border: 1px solid transparent;
    min-width: 140px;
}

.balance-label {
    font-size: 0.8rem;
    font-weight: 700;
    opacity: 0.9;
}

.balance-amount {
    font-size: 1.08rem;
    font-weight: 800;
}

.balance-pay {
    background: #fef2f2;
    border-color: #fecaca;
    color: #b91c1c;
}

.balance-receive {
    background: #ecfdf3;
    border-color: #86efac;
    color: #166534;
}

.balance-settled {
    background: #f3f4f6;
    border-color: #d1d5db;
    color: #374151;
}

.collapsible-panel {
    padding: 0;
    overflow: hidden;
}

.section-summary {
    list-style: none;
    cursor: pointer;
    padding: 18px;
    font-weight: 700;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
}

.section-summary::-webkit-details-marker {
    display: none;
}

.section-summary::after {
    content: "▾";
    font-size: 1rem;
    color: var(--muted);
    transition: transform 0.2s ease;
}

.collapsible-panel:not([open]) .section-summary::after {
    transform: rotate(-90deg);
}

.collapsible-panel > *:not(summary) {
    padding: 0 18px 18px;
}

@media (max-width: 720px) {
    .section-summary {
        padding: 14px;
    }

    .collapsible-panel > *:not(summary) {
        padding: 0 14px 14px;
    }
}