:root {
    --uhab-navy: #16234a;
    --uhab-navy-light: #1f3266;
    --uhab-gold: #d4af37;
    --uhab-gold-light: #e8c96a;
    --gray-bg: #f4f5f7;
    --gray-border: #dde1e7;
    --text: #222633;
    --danger: #c0392b;
    --danger-bg: #fdecea;
    --ok: #1e7e34;
    --ok-bg: #e9f7ef;
}

* { box-sizing: border-box; }

body {
    margin: 0;
    font-family: 'Segoe UI', Roboto, Arial, sans-serif;
    background: var(--gray-bg);
    color: var(--text);
}

a { color: var(--uhab-navy-light); }

.topbar {
    background: linear-gradient(90deg, var(--uhab-navy) 0%, var(--uhab-navy-light) 100%);
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 10px 24px;
    box-shadow: 0 2px 8px rgba(0,0,0,.15);
}
.topbar .brand { display: flex; align-items: center; gap: 12px; }
.topbar .brand img { height: 44px; }
.topbar .brand-text { line-height: 1.15; }
.topbar .brand-text strong { font-size: 16px; color: var(--uhab-gold-light); }
.topbar .brand-text span { font-size: 12px; color: #cfd6e6; }
.topbar nav a {
    color: #fff; text-decoration: none; margin-left: 18px; font-size: 14px;
}
.topbar nav a:hover { color: var(--uhab-gold-light); }
.topbar .user-chip {
    background: rgba(255,255,255,.1); padding: 4px 12px; border-radius: 20px; font-size: 13px;
}

.container { max-width: 1100px; margin: 24px auto; padding: 0 16px; }
.container.narrow { max-width: 480px; }

.card {
    background: #fff; border: 1px solid var(--gray-border); border-radius: 10px;
    padding: 24px; margin-bottom: 20px; box-shadow: 0 1px 3px rgba(0,0,0,.04);
}

h1, h2, h3 { color: var(--uhab-navy); margin-top: 0; }
h1 { font-size: 22px; }
h2 { font-size: 18px; }

.btn {
    display: inline-block; background: var(--uhab-navy); color: #fff; border: none;
    padding: 10px 18px; border-radius: 6px; font-size: 14px; cursor: pointer; text-decoration: none;
}
.btn:hover { background: var(--uhab-navy-light); }
.btn.gold { background: var(--uhab-gold); color: var(--uhab-navy); font-weight: 600; }
.btn.gold:hover { background: var(--uhab-gold-light); }
.btn.danger { background: var(--danger); }
.btn.small { padding: 5px 12px; font-size: 13px; }
.btn.outline { background: transparent; color: var(--uhab-navy); border: 1px solid var(--uhab-navy); }

form label { display: block; margin: 12px 0 4px; font-size: 13px; font-weight: 600; color: #444; }
form input, form select, form textarea {
    width: 100%; padding: 9px 10px; border: 1px solid var(--gray-border); border-radius: 6px; font-size: 14px;
}
form .row { display: flex; gap: 16px; }
form .row > div { flex: 1; }

table { width: 100%; border-collapse: collapse; font-size: 14px; }
table th, table td { text-align: left; padding: 10px 12px; border-bottom: 1px solid var(--gray-border); }
table th { background: var(--gray-bg); color: var(--uhab-navy); font-size: 13px; text-transform: uppercase; letter-spacing: .03em; }
table tr:hover td { background: #fafbfc; }

.badge { display: inline-block; padding: 3px 10px; border-radius: 20px; font-size: 12px; font-weight: 600; }
.badge.ok { background: var(--ok-bg); color: var(--ok); }
.badge.danger { background: var(--danger-bg); color: var(--danger); }
.badge.warn { background: #fff6db; color: #8a6d00; }

.alert { padding: 12px 16px; border-radius: 8px; margin-bottom: 16px; font-size: 14px; }
.alert.error { background: var(--danger-bg); color: var(--danger); border: 1px solid #f1c3bd; }
.alert.success { background: var(--ok-bg); color: var(--ok); border: 1px solid #b7e2c4; }

.stats-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); gap: 16px; margin-bottom: 20px; }
.stat-box { background: #fff; border: 1px solid var(--gray-border); border-radius: 10px; padding: 18px; text-align: center; }
.stat-box .num { font-size: 28px; font-weight: 700; color: var(--uhab-navy); }
.stat-box .label { font-size: 13px; color: #666; margin-top: 4px; }
.stat-box.gold .num { color: #b8860b; }
.stat-box.danger .num { color: var(--danger); }

.login-wrap {
    min-height: 100vh; display: flex; align-items: center; justify-content: center;
    background: linear-gradient(160deg, var(--uhab-navy) 0%, #0c1730 100%);
}
.login-box { background: #fff; padding: 36px 32px; border-radius: 14px; width: 360px; box-shadow: 0 12px 40px rgba(0,0,0,.35); }
.login-box img { display: block; margin: 0 auto 12px; height: 80px; }
.login-box h1 { text-align: center; font-size: 18px; }
.login-box .sub { text-align: center; color: #777; font-size: 13px; margin-bottom: 20px; }
.login-box .btn { width: 100%; margin-top: 14px; }
.login-box .switch-link { text-align: center; margin-top: 14px; font-size: 13px; }

.filters { display: flex; gap: 12px; align-items: end; margin-bottom: 16px; flex-wrap: wrap; }
.filters .field { min-width: 160px; }
.filters label { font-size: 12px; font-weight: 600; color: #555; }

/* ---------- Estado de cuenta ---------- */
.statement { max-width: 800px; margin: 24px auto; background: #fff; padding: 32px; border: 1px solid var(--gray-border); border-radius: 10px; }
.statement-header { display: flex; align-items: center; gap: 20px; border-bottom: 3px solid var(--uhab-gold); padding-bottom: 16px; margin-bottom: 20px; }
.statement-header img { height: 90px; }
.statement-header .school-name { font-size: 18px; font-weight: 700; color: var(--uhab-navy); line-height: 1.3; }
.statement-header .plantel { font-size: 14px; color: var(--uhab-gold); font-weight: 600; }
.statement h2.title { text-align: center; color: var(--uhab-navy); border-bottom: 1px solid var(--gray-border); padding-bottom: 10px; }
.data-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 10px 24px; margin-bottom: 20px; font-size: 14px; }
.data-grid .k { color: #666; }
.data-grid .v { font-weight: 600; }
.summary-boxes { display: flex; gap: 16px; margin: 20px 0; }
.summary-boxes .box { flex: 1; text-align: center; border-radius: 8px; padding: 14px; border: 1px solid var(--gray-border); }
.summary-boxes .box .amt { font-size: 22px; font-weight: 700; }
.summary-boxes .box.due { background: var(--danger-bg); }
.summary-boxes .box.due .amt { color: var(--danger); }
.summary-boxes .box.total { background: #fff6db; }
.summary-boxes .box.total .amt { color: #8a6d00; }
.pay-info { background: var(--gray-bg); border-radius: 8px; padding: 16px 20px; margin-top: 20px; font-size: 14px; line-height: 1.7; }
.pay-info strong { color: var(--uhab-navy); }
.print-actions { text-align: center; margin: 20px 0; }

/* ---------- Recibo de pago ---------- */
.receipt { max-width: 620px; margin: 24px auto; background: #fff; padding: 30px; border: 1px solid var(--gray-border); border-radius: 10px; }
.receipt-header { display: flex; align-items: center; justify-content: space-between; gap: 16px; border-bottom: 3px solid var(--uhab-gold); padding-bottom: 14px; margin-bottom: 18px; }
.receipt-header .brand-block { display: flex; align-items: center; gap: 14px; }
.receipt-header img { height: 68px; }
.receipt-header .school-name { font-size: 15px; font-weight: 700; color: var(--uhab-navy); line-height: 1.3; }
.receipt-header .plantel { font-size: 13px; color: var(--uhab-gold); font-weight: 600; }
.receipt-header .receipt-no { text-align: right; font-size: 12px; color: #777; }
.receipt-header .receipt-no strong { display: block; font-size: 16px; color: var(--uhab-navy); }
.receipt h2.title { text-align: center; color: var(--uhab-navy); margin: 0 0 18px; letter-spacing: .04em; }
.receipt .data-grid { margin-bottom: 16px; }
.receipt .amount-box { background: var(--ok-bg); border: 1px solid #b7e2c4; border-radius: 8px; text-align: center; padding: 16px; margin: 18px 0; }
.receipt .amount-box .amt { font-size: 30px; font-weight: 700; color: var(--ok); }
.receipt .amount-box .label { font-size: 13px; color: #4c7a58; margin-top: 2px; }
.receipt .concept { background: var(--gray-bg); border-radius: 8px; padding: 14px 18px; font-size: 14px; margin-bottom: 16px; }
.receipt .signature { margin-top: 40px; text-align: center; font-size: 13px; color: #777; }
.receipt .signature .line { border-top: 1px solid #999; width: 240px; margin: 0 auto 6px; padding-top: 6px; }
.receipt .footnote { text-align: center; font-size: 11px; color: #999; margin-top: 24px; }

@media print {
    .no-print { display: none !important; }
    body { background: #fff; }
    .statement { border: none; margin: 0; padding: 0; box-shadow: none; }
    .receipt { border: none; margin: 0; padding: 0; box-shadow: none; }
    .container { margin: 0; max-width: 100%; }
}