@import url('https://fonts.googleapis.com/css2?family=Fraunces:opsz,wght@9..144,500;9..144,600;9..144,700&family=Inter:wght@400;500;600;700&family=IBM+Plex+Mono:wght@500;600&display=swap');

:root {
    --paper: #EEF2ED;
    --paper-raised: #F7FAF6;
    --ink: #1B2B22;
    --ink-muted: #55665C;
    --ink-faint: #8B9A90;
    --rule: #CBD6C7;
    --rule-strong: #A8B8A3;
    --accent: #2B4570;
    --accent-hover: #1D3355;
    --stamp-paid: #2F6B45;
    --stamp-unpaid: #B4432F;
    --stamp-neutral: #8A6D3B;
    --danger: #B4432F;
    --radius: 6px;
    --shadow: 0 1px 2px rgba(27, 43, 34, 0.06), 0 4px 14px rgba(27, 43, 34, 0.06);
    font-variant-numeric: tabular-nums;
}

* { box-sizing: border-box; }

body {
    margin: 0;
    font-family: 'Inter', -apple-system, sans-serif;
    background: var(--paper);
    color: var(--ink);
    -webkit-font-smoothing: antialiased;
}

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

h1, h2, h3 { font-family: 'Fraunces', Georgia, serif; font-weight: 600; margin: 0 0 4px; color: var(--ink); }
.text-muted { color: var(--ink-muted); }
.small { font-size: 12.5px; }
.center-text { text-align: center; }

label { display: block; font-size: 13px; font-weight: 600; color: var(--ink-muted); margin: 12px 0 5px; text-transform: uppercase; letter-spacing: 0.03em; }
input, select, textarea {
    width: 100%; padding: 10px 12px; border: 1px solid var(--rule-strong);
    border-radius: var(--radius); font-family: 'Inter', sans-serif; font-size: 14.5px;
    background: #fff; color: var(--ink);
}
input:focus, select:focus, textarea:focus { outline: 2px solid var(--accent); outline-offset: 1px; border-color: var(--accent); }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
@media (max-width: 640px) { .form-row { grid-template-columns: 1fr; } }

.btn {
    display: inline-block; padding: 10px 20px; border-radius: var(--radius); border: none;
    font-family: 'Inter', sans-serif; font-weight: 600; font-size: 14.5px; cursor: pointer;
    text-align: center;
}
.btn-primary { background: var(--accent); color: #fff; }
.btn-primary:hover { background: var(--accent-hover); text-decoration: none; }
.btn-secondary { background: #fff; color: var(--ink); border: 1px solid var(--rule-strong); }
.btn-secondary:hover { background: var(--paper-raised); text-decoration: none; }
.btn-block { width: 100%; }
.link-danger { background: none; border: none; color: var(--danger); cursor: pointer; font-size: 14px; padding: 0; }
.link-danger:hover { text-decoration: underline; }

.alert { padding: 12px 16px; border-radius: var(--radius); margin-bottom: 16px; font-size: 14px; border-left: 3px solid; }
.alert-success { background: #E8F3EA; color: var(--stamp-paid); border-color: var(--stamp-paid); }
.alert-error { background: #FAECE8; color: var(--stamp-unpaid); border-color: var(--stamp-unpaid); }

/* ===== Auth page ===== */
.auth-page { display: flex; align-items: center; justify-content: center; min-height: 100vh; padding: 20px; }
.auth-box { background: var(--paper-raised); border: 1px solid var(--rule); border-radius: 10px; padding: 40px; width: 100%; max-width: 380px; box-shadow: var(--shadow); }
.auth-box h1 { font-size: 26px; }
.auth-box .subtitle { color: var(--ink-muted); margin-bottom: 20px; font-size: 14px; }

/* ===== Admin shell ===== */
.app-shell { display: flex; min-height: 100vh; }
.sidebar {
    width: 220px; background: var(--ink); color: #EAEFE9; display: flex; flex-direction: column;
    padding: 24px 0; flex-shrink: 0;
}
.sidebar-brand { font-family: 'Fraunces', serif; font-size: 20px; font-weight: 600; padding: 0 24px 24px; border-bottom: 1px solid rgba(234,239,233,0.15); margin-bottom: 16px; }
.sidebar nav { display: flex; flex-direction: column; gap: 2px; flex: 1; }
.sidebar nav a { color: #C7D2C4; padding: 11px 24px; font-size: 14.5px; font-weight: 500; }
.sidebar nav a:hover { background: rgba(234,239,233,0.08); text-decoration: none; }
.sidebar nav a.active { background: rgba(234,239,233,0.12); color: #fff; border-right: 3px solid var(--stamp-paid); }
.sidebar-footer { padding: 16px 24px 0; border-top: 1px solid rgba(234,239,233,0.15); }
.admin-name { font-size: 13px; color: #C7D2C4; margin-bottom: 6px; }
.logout-link { font-size: 13px; color: #EAEFE9; }
.main-content { flex: 1; padding: 32px 40px; max-width: 1100px; }

.page-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 24px; flex-wrap: wrap; gap: 12px; }
.page-header h1 { font-size: 24px; display: flex; align-items: center; gap: 10px; }

.card { background: var(--paper-raised); border: 1px solid var(--rule); border-radius: 10px; padding: 24px; margin-bottom: 24px; }
.card h2 { font-size: 17px; margin-bottom: 14px; }

.stat-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; margin-bottom: 24px; }
@media (max-width: 900px) { .stat-grid { grid-template-columns: repeat(2, 1fr); } }
.stat-card { background: var(--paper-raised); border: 1px solid var(--rule); border-radius: 10px; padding: 18px 20px; }
.stat-label { font-size: 12.5px; color: var(--ink-muted); text-transform: uppercase; letter-spacing: 0.03em; margin-bottom: 6px; }
.stat-value { font-family: 'IBM Plex Mono', monospace; font-size: 22px; font-weight: 600; }
.stat-sub { font-family: 'IBM Plex Mono', monospace; font-size: 13px; color: var(--ink-muted); margin-top: 2px; }
.stat-warning { border-left: 3px solid var(--stamp-unpaid); }
.stat-success { border-left: 3px solid var(--stamp-paid); }

.data-table { width: 100%; border-collapse: collapse; }
.data-table th { text-align: left; font-size: 12px; text-transform: uppercase; letter-spacing: 0.04em; color: var(--ink-muted); padding: 10px 12px; border-bottom: 2px solid var(--rule-strong); }
.data-table td { padding: 12px; border-bottom: 1px solid var(--rule); font-size: 14.5px; }
.data-table .empty { text-align: center; color: var(--ink-faint); padding: 30px; }

.badge { display: inline-block; padding: 3px 10px; border-radius: 20px; font-size: 12px; font-weight: 700; text-transform: uppercase; letter-spacing: 0.03em; }
.badge-unpaid { background: #FAECE8; color: var(--stamp-unpaid); }
.badge-paid { background: #E8F3EA; color: var(--stamp-paid); }
.badge-expired { background: #F1EEE8; color: var(--stamp-neutral); }
.badge-cancelled { background: #EDEDED; color: #6B6B6B; }

.filter-bar { display: flex; gap: 10px; margin-bottom: 18px; flex-wrap: wrap; }
.filter-bar input { max-width: 260px; }
.filter-bar select { max-width: 200px; }

/* Modal */
.modal-overlay { position: fixed; inset: 0; background: rgba(27,43,34,0.45); display: flex; align-items: center; justify-content: center; z-index: 50; padding: 20px; }
.modal-box { background: #fff; border-radius: 10px; padding: 28px; width: 100%; max-width: 440px; }
.modal-actions { display: flex; justify-content: flex-end; gap: 10px; margin-top: 18px; }

/* Item table (invoice form) */
.item-table { width: 100%; border-collapse: collapse; margin: 12px 0; }
.item-table th { text-align: left; font-size: 12px; text-transform: uppercase; color: var(--ink-muted); padding: 6px 8px; border-bottom: 2px solid var(--rule-strong); }
.item-table td { padding: 6px 8px; border-bottom: 1px solid var(--rule); }
.item-table input { padding: 7px 9px; font-size: 14px; }
.row-subtotal { font-family: 'IBM Plex Mono', monospace; white-space: nowrap; }
.item-actions { display: flex; gap: 10px; align-items: center; margin: 10px 0 20px; flex-wrap: wrap; }
.item-actions select { max-width: 280px; }

.totals-box { max-width: 360px; margin-left: auto; padding-top: 12px; border-top: 1px dashed var(--rule-strong); }
.totals-row { display: flex; justify-content: space-between; align-items: center; padding: 6px 0; font-size: 14.5px; }
.totals-row label { margin: 0; text-transform: none; letter-spacing: 0; font-weight: 500; color: var(--ink); }
.inline-inputs { display: flex; gap: 6px; }
.inline-inputs select { max-width: 130px; }
.inline-inputs input { max-width: 100px; }
.totals-final { font-family: 'IBM Plex Mono', monospace; font-weight: 700; font-size: 17px; border-top: 1px solid var(--rule-strong); margin-top: 6px; padding-top: 12px; }

.detail-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; margin-bottom: 24px; }
@media (max-width: 800px) { .detail-grid { grid-template-columns: 1fr; } }
.link-box { display: flex; gap: 8px; }
.link-box input { font-family: 'IBM Plex Mono', monospace; font-size: 13px; }
.action-row { display: flex; gap: 14px; align-items: center; margin-top: 16px; flex-wrap: wrap; }
.log-list { list-style: none; padding: 0; margin: 0; font-size: 14px; }
.log-list li { padding: 8px 0; border-bottom: 1px solid var(--rule); }

/* ===== Public invoice (payment link) page ===== */
.invoice-page { background: var(--paper); min-height: 100vh; padding: 40px 16px; }
.invoice-wrapper { max-width: 460px; margin: 0 auto; }
.invoice-card {
    background: var(--paper-raised);
    border: 1px solid var(--rule);
    border-radius: 4px;
    padding: 32px 28px 28px;
    box-shadow: var(--shadow);
    position: relative;
    /* perforated receipt edge */
    background-image: radial-gradient(circle at 8px 0, transparent 7px, var(--paper) 7.5px);
    background-position: top;
    background-size: 16px 16px;
    background-repeat: repeat-x;
}
.invoice-brand { font-family: 'Fraunces', serif; font-size: 20px; font-weight: 600; text-align: center; margin-bottom: 18px; padding-top: 6px; }

.invoice-status-banner {
    text-align: center; padding: 8px; border-radius: 4px; font-weight: 700; font-size: 13px;
    text-transform: uppercase; letter-spacing: 0.06em; margin-bottom: 20px;
    border: 2px solid; transform: rotate(-1deg);
}
.status-unpaid { color: var(--stamp-unpaid); border-color: var(--stamp-unpaid); background: #FAECE8; }
.status-paid { color: var(--stamp-paid); border-color: var(--stamp-paid); background: #E8F3EA; }
.status-expired { color: var(--stamp-neutral); border-color: var(--stamp-neutral); background: #F1EEE8; }
.status-cancelled { color: #6B6B6B; border-color: #9A9A9A; background: #EDEDED; }

.invoice-meta { display: flex; justify-content: space-between; gap: 10px; flex-wrap: wrap; padding-bottom: 16px; margin-bottom: 16px; border-bottom: 1px dashed var(--rule-strong); }
.meta-label { font-size: 11px; text-transform: uppercase; letter-spacing: 0.04em; color: var(--ink-muted); margin-bottom: 3px; }
.meta-value { font-size: 14.5px; font-weight: 600; }

.invoice-items-table { width: 100%; border-collapse: collapse; margin-bottom: 16px; }
.invoice-items-table th { text-align: left; font-size: 11px; text-transform: uppercase; color: var(--ink-muted); padding: 6px 4px; border-bottom: 1px solid var(--rule-strong); }
.invoice-items-table td { padding: 10px 4px; border-bottom: 1px solid var(--rule); font-size: 14px; vertical-align: top; }
.invoice-items-table td:last-child, .invoice-items-table th:last-child { text-align: right; font-family: 'IBM Plex Mono', monospace; }

.invoice-totals { padding-top: 4px; }
.invoice-totals .totals-row span:last-child { font-family: 'IBM Plex Mono', monospace; }
.invoice-totals .totals-final { font-size: 19px; }

.invoice-notes { background: var(--paper); border-radius: 4px; padding: 12px 14px; font-size: 13.5px; color: var(--ink-muted); margin: 16px 0; }

.btn-pay {
    display: block; width: 100%; text-align: center; padding: 15px; margin-top: 20px;
    background: var(--accent); color: #fff; font-weight: 700; font-size: 15.5px;
    text-transform: uppercase; letter-spacing: 0.04em; border: none; border-radius: 4px; cursor: pointer;
}
.btn-pay:hover { background: var(--accent-hover); text-decoration: none; }
.btn-pay:disabled { opacity: 0.6; cursor: default; }

.powered-by { text-align: center; font-size: 12px; color: var(--ink-faint); margin-top: 18px; }