/* ===== Reset e base ===== */
* { margin: 0; padding: 0; box-sizing: border-box; }

:root {
  --bg: #f4f6f8;
  --card: #ffffff;
  --text: #1f2933;
  --muted: #6b7684;
  --border: #e2e8f0;
  --primary: #0d9488;
  --primary-dark: #0f766e;
  --danger: #dc2626;
  --warning: #d97706;
  --success: #16a34a;
  --info: #2563eb;
  --radius: 10px;
  --shadow: 0 1px 3px rgba(0,0,0,.06), 0 1px 2px rgba(0,0,0,.04);
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.5;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* ===== Topbar ===== */
.topbar {
  background: var(--card);
  border-bottom: 1px solid var(--border);
  padding: 1rem 2rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
}
.brand { display: flex; align-items: center; gap: .85rem; }
.brand-icon {
  width: 44px; height: 44px; border-radius: 12px;
  background: var(--primary); color: #fff;
  display: flex; align-items: center; justify-content: center;
  font-size: 1.4rem; font-weight: 700;
}
.brand h1 { font-size: 1.25rem; font-weight: 700; }
.subtitle { font-size: .8rem; color: var(--muted); }

.tabs { display: flex; gap: .5rem; }
.tab-btn {
  padding: .55rem 1.2rem; border: 1px solid var(--border);
  background: var(--card); border-radius: 8px; cursor: pointer;
  font-size: .92rem; font-weight: 600; color: var(--muted);
  transition: all .15s ease;
}
.tab-btn:hover { border-color: var(--primary); color: var(--primary); }
.tab-btn.active { background: var(--primary); border-color: var(--primary); color: #fff; }

/* ===== Layout ===== */
.container { flex: 1; width: 100%; max-width: 1150px; margin: 0 auto; padding: 2rem; }
.grid.two-col { display: grid; grid-template-columns: 1fr 1fr; gap: 1.5rem; }
@media (max-width: 860px) { .grid.two-col { grid-template-columns: 1fr; } }

.tab-panel { display: none; }
.tab-panel.active { display: block; animation: fade .25s ease; }
@keyframes fade { from { opacity: 0; transform: translateY(4px); } to { opacity: 1; transform: none; } }

/* ===== Cards ===== */
.card {
  background: var(--card); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 1.5rem; box-shadow: var(--shadow);
}
.card h2 { font-size: 1.05rem; margin-bottom: 1rem; font-weight: 700; }
.card-header { display: flex; align-items: center; justify-content: space-between; margin-bottom: 1rem; flex-wrap: wrap; gap: .75rem; }
.card-header h2 { margin-bottom: 0; }

.badge {
  background: #ccfbf1; color: var(--primary-dark);
  padding: .2rem .7rem; border-radius: 999px; font-size: .8rem; font-weight: 700;
}

/* ===== Formulários ===== */
.field { margin-bottom: 1rem; display: flex; flex-direction: column; }
.field-row { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; }
@media (max-width: 480px) { .field-row { grid-template-columns: 1fr; } }

.field label { font-size: .85rem; font-weight: 600; margin-bottom: .35rem; color: var(--text); }
.field input, .field select {
  padding: .65rem .8rem; border: 1px solid var(--border); border-radius: 8px;
  font-size: .95rem; font-family: inherit; background: #fff; color: var(--text);
  transition: border-color .15s, box-shadow .15s;
}
.field input:focus, .field select:focus {
  outline: none; border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(13,148,136,.15);
}
.field.invalid input, .field.invalid select { border-color: var(--danger); }
.error-msg { color: var(--danger); font-size: .78rem; margin-top: .3rem; min-height: 1em; }

.form-success { color: var(--success); font-size: .85rem; margin-top: .75rem; font-weight: 600; min-height: 1.2em; }

.btn {
  padding: .7rem 1.4rem; border: none; border-radius: 8px;
  font-size: .95rem; font-weight: 600; cursor: pointer; transition: background .15s;
  font-family: inherit;
}
.btn-primary { background: var(--primary); color: #fff; width: 100%; }
.btn-primary:hover { background: var(--primary-dark); }

.btn-sm {
  padding: .3rem .7rem; font-size: .78rem; border-radius: 6px;
  border: 1px solid var(--border); background: #fff; cursor: pointer;
  font-weight: 600; font-family: inherit; transition: all .15s;
}
.btn-sm:hover { border-color: var(--primary); color: var(--primary); }
.btn-sm.danger:hover { border-color: var(--danger); color: var(--danger); }
.btn-sm.pay { background: var(--success); color: #fff; border-color: var(--success); }
.btn-sm.pay:hover { background: #15803d; }

/* ===== Tabelas ===== */
.table-wrap { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; font-size: .9rem; }
th, td { padding: .7rem .8rem; text-align: left; border-bottom: 1px solid var(--border); }
th { font-size: .78rem; text-transform: uppercase; letter-spacing: .04em; color: var(--muted); font-weight: 600; }
tbody tr:hover { background: #f8fafc; }
td .actions { display: flex; gap: .4rem; flex-wrap: wrap; }

.empty-state { text-align: center; color: var(--muted); padding: 1.5rem 0; font-size: .9rem; }
.hidden { display: none !important; }

/* ===== Status badges ===== */
.status {
  display: inline-block; padding: .22rem .7rem; border-radius: 999px;
  font-size: .75rem; font-weight: 700;
}
.status.pending { background: #fef3c7; color: var(--warning); }
.status.paid    { background: #dcfce7; color: var(--success); }
.status.overdue { background: #fee2e2; color: var(--danger); }

/* ===== Filtros ===== */
.filters { display: flex; gap: .4rem; flex-wrap: wrap; }
.filter-btn {
  padding: .35rem .9rem; border: 1px solid var(--border); background: #fff;
  border-radius: 999px; font-size: .82rem; font-weight: 600; cursor: pointer;
  color: var(--muted); transition: all .15s; font-family: inherit;
}
.filter-btn:hover { border-color: var(--primary); color: var(--primary); }
.filter-btn.active { background: var(--primary); border-color: var(--primary); color: #fff; }

/* ===== Estatísticas ===== */
.stats { display: grid; grid-template-columns: 1fr 1fr; gap: .8rem; }
.stat {
  border: 1px solid var(--border); border-radius: 10px; padding: .9rem 1rem;
  display: flex; flex-direction: column; gap: .2rem;
}
.stat-label { font-size: .78rem; color: var(--muted); font-weight: 600; }
.stat-value { font-size: 1.5rem; font-weight: 800; }
.stat-total .stat-value   { color: var(--text); }
.stat-pending .stat-value { color: var(--warning); }
.stat-paid .stat-value    { color: var(--success); }
.stat-overdue .stat-value { color: var(--danger); }
.hint { margin-top: 1rem; font-size: .8rem; color: var(--muted); }

/* ===== Footer ===== */
.footer { text-align: center; padding: 1.2rem; color: var(--muted); font-size: .8rem; border-top: 1px solid var(--border); background: var(--card); }

/* ===== Navegação principal (links) ===== */
.main-nav { display: flex; gap: .5rem; }
.main-nav a {
  padding: .55rem 1.2rem; border: 1px solid var(--border);
  background: var(--card); border-radius: 8px; cursor: pointer;
  font-size: .92rem; font-weight: 600; color: var(--muted);
  text-decoration: none; transition: all .15s ease;
}
.main-nav a:hover { border-color: var(--primary); color: var(--primary); }
.main-nav a.active { background: var(--primary); border-color: var(--primary); color: #fff; }

/* ===== Flash messages ===== */
.flash {
  padding: .8rem 1.2rem; border-radius: 8px; margin-bottom: 1.5rem;
  font-weight: 600; font-size: .9rem; border: 1px solid transparent;
}
.flash-success { background: #dcfce7; color: #166534; border-color: #bbf7d0; }
.flash-error   { background: #fee2e2; color: #991b1b; border-color: #fecaca; }

/* ===== Page header ===== */
.page-header { margin-bottom: 1.5rem; }
.page-header h2 { font-size: 1.4rem; font-weight: 800; }
.page-header p { color: var(--muted); font-size: .9rem; margin-top: .2rem; }

/* ===== Quick links (dashboard) ===== */
.quick-link { text-decoration: none; color: inherit; display: block; transition: all .15s; }
.quick-link:hover { border-color: var(--primary); transform: translateY(-2px); box-shadow: 0 4px 12px rgba(13,148,136,.15); }
.quick-link h3 { color: var(--primary); margin-bottom: .4rem; }
.quick-link p { color: var(--muted); font-size: .88rem; }

/* ===== Stats 4 colunas ===== */
.stats-4 { grid-template-columns: repeat(4, 1fr); }
@media (max-width: 700px) { .stats-4 { grid-template-columns: 1fr 1fr; } }

/* ===== Formulários inline (botões de ação) ===== */
.inline-form { display: inline-block; margin: 0; }
.actions { display: flex; gap: .4rem; flex-wrap: wrap; align-items: center; }

/* ===== Página de Login ===== */
.login-body {
    display: flex; align-items: center; justify-content: center;
    min-height: 100vh; background: linear-gradient(135deg, #0f766e, #134e4a);
}
.login-wrap { width: 100%; max-width: 400px; padding: 1rem; }
.login-card {
    background: #fff; border-radius: 14px; padding: 2.2rem 2rem;
    box-shadow: 0 10px 40px rgba(0,0,0,.2);
}
.login-brand { text-align: center; margin-bottom: 1.5rem; }
.login-brand .brand-icon {
    width: 52px; height: 52px; margin: 0 auto .8rem; border-radius: 14px;
    background: var(--primary); color: #fff; display: flex;
    align-items: center; justify-content: center; font-size: 1.6rem; font-weight: 700;
}
.login-brand h1 { font-size: 1.2rem; margin-bottom: .2rem; }
.login-brand p { color: var(--muted); font-size: .85rem; }
.login-hint {
    margin-top: 1.2rem; padding: .7rem .9rem; background: #f0fdfa;
    border: 1px solid #99f6e4; border-radius: 8px;
    font-size: .78rem; color: #115e59; line-height: 1.5;
}
.login-hint em { color: var(--muted); }

/* ===== Caixa do usuário logado no header ===== */
.user-box { display: flex; align-items: center; gap: .7rem; }
.user-name { font-size: .85rem; color: var(--muted); font-weight: 600; }
.logout-btn { background: #fef2f2; color: var(--danger); border-color: #fecaca; }
.logout-btn:hover { background: var(--danger); color: #fff; border-color: var(--danger); }

@media (max-width: 700px) {
    .user-box .user-name { display: none; }
}