@import url('https://fonts.googleapis.com/css2?family=Plus+Jakarta+Sans:wght@400;500;600;700;800&family=DM+Mono:wght@400;500&display=swap');

:root {
  color-scheme: light;

  /* Brand */
  --primary:        #1B4FD8;
  --primary-hover:  #1540B8;
  --primary-soft:   #EEF3FF;
  --primary-glow:   rgba(27, 79, 216, 0.15);

  /* Surface */
  --bg:             #F4F6FB;
  --surface:        #FFFFFF;
  --surface-soft:   #F0F3FA;
  --surface-hover:  #E8EDF8;

  /* Text */
  --text:           #0D1526;
  --muted:          #5A6A8A;
  --subtle:         #8A99B8;

  /* Border */
  --border:         #DDE3F0;
  --border-soft:    #EBF0FA;

  /* Semantic */
  --success:        #0F9B5E;
  --success-soft:   #E8FAF2;
  --warning:        #D97706;
  --warning-soft:   #FEF6E4;
  --danger:         #C8002F;
  --danger-soft:    #FEE8EE;

  /* Radius */
  --radius-card:    18px;
  --radius-input:   12px;
  --radius-btn:     12px;
  --radius-badge:   999px;

  /* Shadow */
  --shadow-xs:      0 1px 3px rgba(13, 21, 38, 0.06);
  --shadow-sm:      0 4px 16px rgba(13, 21, 38, 0.07);
  --shadow-md:      0 12px 40px rgba(13, 21, 38, 0.10);
  --shadow-blue:    0 8px 28px rgba(27, 79, 216, 0.20);

  /* Spacing */
  --space-1: 4px;  --space-2: 8px;  --space-3: 12px; --space-4: 16px;
  --space-5: 20px; --space-6: 24px; --space-8: 32px; --space-10: 40px;

  /* Font */
  --font: 'Plus Jakarta Sans', system-ui, -apple-system, sans-serif;
  --font-mono: 'DM Mono', 'Courier New', monospace;
}

/* ─── Reset ─────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { min-height: 100%; scroll-behavior: smooth; }

body {
  min-height: 100vh;
  font-family: var(--font);
  font-size: 15px;
  line-height: 1.6;
  color: var(--text);
  background: var(--bg);
  background-image:
    radial-gradient(ellipse 80% 50% at 50% -10%, rgba(27,79,216,0.08) 0%, transparent 60%);
  -webkit-font-smoothing: antialiased;
}

a { color: inherit; text-decoration: none; }
img { display: block; max-width: 100%; }
button, input, select, textarea { font: inherit; }
p { margin: 0; }

/* ─── Layout ─────────────────────────────────────── */
.container, .shell {
  width: min(1200px, calc(100% - 40px));
  margin: 0 auto;
}

.page { padding: var(--space-8) 0 64px; }

/* ─── Topbar ─────────────────────────────────────── */
.topbar {
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: blur(16px) saturate(180%);
  -webkit-backdrop-filter: blur(16px) saturate(180%);
  background: rgba(255, 255, 255, 0.88);
  border-bottom: 1px solid var(--border-soft);
  box-shadow: 0 1px 0 rgba(13,21,38,0.04);
}

.topbar__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  min-height: 72px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: var(--space-3);
  transition: opacity .2s;
}
.brand:hover { opacity: 0.85; }

.brand__logo {
  width: 40px;
  height: 40px;
  border-radius: 11px;
  box-shadow: var(--shadow-sm);
  background: var(--surface);
  border: 1px solid var(--border);
}

.brand__text { display: grid; gap: 1px; }

.brand__name {
  display: block;
  font-size: 1rem;
  font-weight: 800;
  letter-spacing: -0.03em;
  color: var(--text);
}

.brand__tag {
  display: block;
  font-size: 0.78rem;
  color: var(--muted);
  font-weight: 500;
}

.topbar__links {
  display: flex;
  gap: var(--space-2);
  align-items: center;
}

/* ─── Page Header ────────────────────────────────── */
.page-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  gap: var(--space-6);
  margin-bottom: var(--space-8);
}

.page-title {
  font-size: clamp(1.8rem, 3vw, 2.6rem);
  font-weight: 800;
  letter-spacing: -0.045em;
  line-height: 1.05;
}

.page-subtitle {
  margin-top: 8px;
  color: var(--muted);
  font-size: 0.95rem;
  max-width: 68ch;
}

/* ─── Hero Grid ──────────────────────────────────── */
.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(340px, 0.85fr);
  gap: var(--space-6);
  align-items: start;
}

.display {
  font-size: clamp(2.4rem, 5vw, 4.2rem);
  font-weight: 800;
  letter-spacing: -0.06em;
  line-height: 0.96;
  margin: 20px 0 16px;
  background: linear-gradient(135deg, var(--text) 40%, var(--primary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.lead {
  font-size: 1.05rem;
  color: var(--muted);
  line-height: 1.7;
  max-width: 52ch;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: 6px 14px;
  border-radius: var(--radius-badge);
  background: var(--primary-soft);
  color: var(--primary);
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  border: 1px solid rgba(27,79,216,0.12);
}

/* ─── Feature list ───────────────────────────────── */
.feature-list {
  display: grid;
  gap: var(--space-4);
  margin-top: var(--space-6);
}

.feature-item {
  display: grid;
  grid-template-columns: 44px 1fr;
  gap: var(--space-3);
  align-items: start;
}

.feature-item__icon {
  display: grid;
  place-items: center;
  width: 44px;
  height: 44px;
  border-radius: 12px;
  background: var(--primary-soft);
  color: var(--primary);
  font-weight: 800;
  font-size: 0.85rem;
  border: 1px solid rgba(27,79,216,0.1);
}

.feature-item strong {
  display: block;
  font-weight: 700;
  margin-bottom: 3px;
  font-size: 0.95rem;
}

.feature-item span {
  color: var(--muted);
  font-size: 0.9rem;
  line-height: 1.5;
}

/* ─── App Grid (sidebar layout) ─────────────────── */
.app-grid {
  display: grid;
  grid-template-columns: 240px minmax(0, 1fr);
  gap: var(--space-6);
}

/* ─── Cards ──────────────────────────────────────── */
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-card);
  box-shadow: var(--shadow-sm);
  transition: box-shadow .2s;
}

.card--pad-lg { padding: var(--space-6); }
.card--pad-md { padding: var(--space-5); }

.card-header, .table-header {
  padding: var(--space-6);
  padding-bottom: var(--space-4);
  border-bottom: 1px solid var(--border-soft);
}

.card-body, .form-shell, .list-card, .stack {
  display: grid;
  gap: var(--space-5);
}

/* ─── Stats / KPI ────────────────────────────────── */
.stats, .kpi-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: var(--space-4);
}

.stat-card, .kpi-card {
  position: relative;
  padding: var(--space-5) var(--space-5) var(--space-5) calc(var(--space-5) + 4px);
  overflow: hidden;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-card);
  box-shadow: var(--shadow-xs);
  transition: transform .2s, box-shadow .2s;
}

.stat-card:hover, .kpi-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-sm);
}

.stat-card h2, .kpi-card small {
  display: block;
  margin: 0 0 10px;
  color: var(--muted);
  font-size: 0.82rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.stat-card strong, .kpi-card strong {
  font-size: 1.1rem;
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1.2;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* Colored left bar */
.stat-card::before {
  content: "";
  position: absolute;
  inset: 12px auto 12px 0;
  width: 4px;
  border-radius: 0 4px 4px 0;
}

.stat-card.received  { background: linear-gradient(160deg, var(--success-soft) 0%, var(--surface) 60%); }
.stat-card.received::before  { background: var(--success); }
.stat-card.open      { background: linear-gradient(160deg, var(--primary-soft) 0%, var(--surface) 60%); }
.stat-card.open::before      { background: var(--primary); }
.stat-card.overdue   { background: linear-gradient(160deg, var(--danger-soft) 0%, var(--surface) 60%); }
.stat-card.overdue::before   { background: var(--danger); }
.stat-card.overdue strong    { color: var(--danger); }
.stat-card.students  { background: linear-gradient(160deg, rgba(13,21,38,0.05) 0%, var(--surface) 60%); }
.stat-card.students::before  { background: var(--text); }

/* ─── Metric grid 3 col ──────────────────────────── */
.metric-grid-3 {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: var(--space-4);
}

/* ─── Nav (sidebar) ──────────────────────────────── */
.sidebar { position: sticky; top: 88px; align-self: start; }

.nav, .nav-stack { display: grid; gap: 6px; }

.nav-item, .nav-link {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: 11px 14px;
  border-radius: 11px;
  border: 1px solid transparent;
  color: var(--muted);
  font-weight: 600;
  font-size: 0.9rem;
  transition: all .15s;
}

.nav-item:hover, .nav-link:hover {
  color: var(--primary);
  background: var(--primary-soft);
}

.nav-item.active, .nav-link.is-active {
  color: var(--primary);
  background: var(--primary-soft);
  border-color: rgba(27,79,216,0.15);
}

/* ─── Buttons ────────────────────────────────────── */
.btn, button, input[type="submit"], .pill-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 44px;
  padding: 10px 18px;
  border-radius: var(--radius-btn);
  border: 1px solid transparent;
  font-weight: 700;
  font-size: 0.9rem;
  line-height: 1;
  cursor: pointer;
  transition: background .15s, color .15s, border-color .15s, box-shadow .15s, transform .15s;
  white-space: nowrap;
}

.btn:hover, button:hover, .pill-link:hover {
  transform: translateY(-1px);
}

.btn:active, button:active { transform: translateY(0); }

.btn-primary {
  background: var(--primary);
  color: #fff;
  box-shadow: var(--shadow-blue);
}
.btn-primary:hover { background: var(--primary-hover); box-shadow: 0 10px 32px rgba(27,79,216,0.28); }

.btn-secondary, .pill-link {
  background: var(--surface);
  color: var(--text);
  border-color: var(--border);
  box-shadow: var(--shadow-xs);
}
.btn-secondary:hover, .pill-link:hover { background: var(--surface-soft); }

.btn-ghost {
  background: transparent;
  color: var(--primary);
  border-color: transparent;
}
.btn-ghost:hover { background: var(--primary-soft); }

.btn-danger {
  background: var(--danger-soft);
  color: var(--danger);
  border-color: rgba(200,0,47,0.15);
}
.btn-danger:hover { background: rgba(200,0,47,0.15); }

.button__spinner {
  width: 14px; height: 14px;
  border-radius: 50%;
  border: 2px solid rgba(255,255,255,0.3);
  border-top-color: currentColor;
  animation: spin .7s linear infinite;
}

button.is-loading { pointer-events: none; opacity: 0.75; }

/* ─── Inputs ─────────────────────────────────────── */
.label, label, .form-field label, .radio-group legend {
  font-size: 0.88rem;
  font-weight: 700;
  color: var(--text);
  letter-spacing: 0.01em;
}

.input,
input[type="text"],
input[type="tel"],
input[type="email"],
input[type="password"],
input[type="number"],
select,
textarea {
  width: 100%;
  min-height: 48px;
  padding: 12px 14px;
  border: 1.5px solid var(--border);
  border-radius: var(--radius-input);
  background: var(--surface);
  color: var(--text);
  font-size: 0.95rem;
  transition: border-color .15s, box-shadow .15s;
}

textarea { min-height: 120px; resize: vertical; }

.input:focus, input:focus, select:focus, textarea:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 4px var(--primary-glow);
}

.input:invalid:not(:placeholder-shown):not(:focus) {
  border-color: var(--danger);
  box-shadow: 0 0 0 4px rgba(200,0,47,0.08);
}

.field, .form-field { display: grid; gap: var(--space-2); }
.field--grow { flex: 1 1 220px; min-width: 220px; }

.form-row, .button-row, .inline-links, .filter-form {
  display: flex;
  gap: var(--space-3);
  flex-wrap: wrap;
  align-items: flex-end;
}

.filter-form {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: var(--space-4);
}

.auth-form { display: grid; gap: var(--space-5); }
.auth-actions { display: flex; padding-top: var(--space-2); }

.radio-group {
  display: grid;
  gap: var(--space-2);
  padding: var(--space-4);
  border: 1.5px solid var(--border);
  border-radius: var(--radius-card);
  background: var(--surface-soft);
}

.radio-option {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-4);
  border-radius: 10px;
  background: var(--surface);
  border: 1px solid var(--border-soft);
  cursor: pointer;
  transition: background .15s, border-color .15s;
}

.radio-option:has(input:checked) {
  background: var(--primary-soft);
  border-color: rgba(27,79,216,0.2);
}

/* ─── Section text ───────────────────────────────── */
.section-title {
  font-size: 1.35rem;
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1.2;
}

.section-copy, .lead, .footer-note, .field-help, .form-helptext {
  color: var(--muted);
  font-size: 0.9rem;
  line-height: 1.65;
}

.footer-note { font-size: 0.82rem; }

/* ─── Table ──────────────────────────────────────── */
.table-wrap { overflow-x: auto; border-radius: 0 0 var(--radius-card) var(--radius-card); }

.table, table { width: 100%; border-collapse: collapse; }

.table thead, table thead {
  background: var(--surface-soft);
}

.table th, table th {
  padding: 13px 16px;
  text-align: left;
  font-size: 0.76rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--muted);
  border-bottom: 1px solid var(--border);
}

.table td, table td {
  padding: 15px 16px;
  border-bottom: 1px solid var(--border-soft);
  vertical-align: middle;
  font-size: 0.92rem;
}

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

.table tbody tr { transition: background .12s; }
.table tbody tr:hover { background: var(--surface-soft); }

/* ─── Badges ─────────────────────────────────────── */
.badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 5px;
  border-radius: var(--radius-badge);
  padding: 5px 11px;
  font-size: 0.76rem;
  font-weight: 700;
  letter-spacing: 0.02em;
}

.badge-success { background: var(--success-soft); color: var(--success); }
.badge-warning { background: var(--warning-soft); color: var(--warning); }
.badge-danger  { background: var(--danger-soft);  color: var(--danger); }
.badge-neutral { background: var(--surface-soft); color: var(--muted); }
.badge-primary { background: var(--primary-soft); color: var(--primary); }

/* ─── Alerts / Notices ───────────────────────────── */
.notice, .alert {
  padding: 13px 16px;
  border-radius: 12px;
  border: 1px solid var(--border);
  background: var(--surface-soft);
  font-size: 0.9rem;
}

.alert-success, .notice--success { background: var(--success-soft); color: var(--success); border-color: rgba(15,155,94,0.2); }
.alert-warning                   { background: var(--warning-soft); color: var(--warning); border-color: rgba(217,119,6,0.2); }
.alert-error, .alert-danger      { background: var(--danger-soft);  color: var(--danger);  border-color: rgba(200,0,47,0.2); }
.alert-info                      { background: var(--primary-soft); color: var(--primary); border-color: rgba(27,79,216,0.15); }

/* ─── List rows ──────────────────────────────────── */
.list-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  padding: 14px 16px;
  border: 1px solid var(--border-soft);
  border-radius: 12px;
  background: var(--surface);
  transition: background .15s, border-color .15s, transform .15s;
}

.list-row:hover {
  background: var(--surface-soft);
  border-color: var(--border);
  transform: translateX(2px);
}

.value-stack { text-align: right; display: grid; gap: 6px; justify-items: end; }

/* ─── Utility ────────────────────────────────────── */
.student-name  { font-weight: 700; }
.guardian-name { color: var(--muted); font-size: 0.88rem; margin-top: 3px; }
.currency      { font-weight: 700; font-family: var(--font-mono); font-size: 0.95rem; }
.overdue-days  { min-width: 100px; }
.mt-6          { margin-top: var(--space-6); }

.code-preview {
  font-family: var(--font-mono);
  font-size: 2.5rem;
  font-weight: 500;
  letter-spacing: 0.3em;
  color: var(--primary);
  background: var(--primary-soft);
  padding: var(--space-5) var(--space-6);
  border-radius: var(--radius-card);
  border: 1.5px dashed rgba(27,79,216,0.25);
  text-align: center;
}

/* ─── Billing toolbar ────────────────────────────── */
.billing-toolbar {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-4);
  align-items: flex-end;
  margin-top: var(--space-5);
}

.billing-toolbar__form { flex: 1 1 380px; }
.billing-toolbar__action { display: flex; align-items: flex-end; }

/* ─── Form errors ────────────────────────────────── */
.errorlist {
  list-style: none;
  color: var(--danger);
  font-size: 0.85rem;
  font-weight: 600;
}

.error { color: var(--danger); font-size: 0.85rem; font-weight: 600; }

/* ─── Admin login override ───────────────────────── */
.form-shell { display: grid; gap: var(--space-5); }

/* ─── Animations ─────────────────────────────────── */
@keyframes spin { to { transform: rotate(360deg); } }

@keyframes fadeUp {
  from { opacity: 0; transform: translateY(12px); }
  to   { opacity: 1; transform: translateY(0); }
}

.card {
  animation: fadeUp .3s ease both;
}

/* ─── Responsive ─────────────────────────────────── */
@media (max-width: 960px) {
  .hero-grid,
  .app-grid {
    grid-template-columns: 1fr;
  }

  .stats, .kpi-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .metric-grid-3 {
    grid-template-columns: repeat(2, 1fr);
  }

  .filter-form {
    grid-template-columns: 1fr 1fr;
  }

  .topbar__inner {
    flex-wrap: wrap;
    padding: 12px 0;
    min-height: auto;
    gap: var(--space-3);
  }

  .topbar__links { flex-wrap: wrap; }

  .sidebar { position: static; }

  .display {
    font-size: clamp(2rem, 6vw, 3rem);
  }
}

@media (max-width: 600px) {
  .container, .shell {
    width: calc(100% - 24px);
  }

  .page { padding-top: var(--space-6); }

  .stats, .kpi-grid {
    grid-template-columns: 1fr 1fr;
  }

  .metric-grid-3,
  .filter-form {
    grid-template-columns: 1fr;
  }

  .page-header {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--space-4);
  }

  .page-header .btn { width: 100%; justify-content: center; }

  .button-row,
  .inline-links,
  .auth-actions,
  .billing-toolbar,
  .billing-toolbar__action {
    display: grid;
  }

  .btn, button, input[type="submit"], .pill-link {
    width: 100%;
  }

  .list-row {
    flex-direction: column;
    align-items: flex-start;
  }

  .value-stack {
    text-align: left;
    justify-items: start;
  }

  .display {
    font-size: clamp(1.9rem, 8vw, 2.6rem);
  }
}
.kpi-card strong { display: block; }


.kpi-value--previsto { color: #185FA5; }
.kpi-value--pago     { color: #3B6D11; }
.kpi-value--aberto   { color: #A32D2D; }

.kpi-badge { display: none; }


/* ─── Portal Grid ────────────────────────────────── */
.portal-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
  margin-bottom: 24px;
}

.portal-card {
  text-decoration: none;
  transition: transform .15s, box-shadow .15s;
}

.portal-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
}

.portal-card__icon {
  width: 44px;
  height: 44px;
  border-radius: 12px;
  display: grid;
  place-items: center;
  margin-bottom: 12px;
  font-size: 1.3rem;
}

.portal-card__title {
  font-size: 1rem;
  font-weight: 800;
  display: block;
  margin-bottom: 4px;
}

.portal-card__desc { font-size: 0.85rem; }

@media (max-width: 960px) {
  .portal-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (max-width: 480px) {
  .portal-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}