:root {
  --bg: #070b16;
  --bg-soft: #0d1426;
  --panel: #111a2e;
  --panel-2: #162038;
  --text: #e8f1ff;
  --muted: #8fa3c4;
  --border: rgba(0, 229, 255, 0.18);
  --cyan: #00e5ff;
  --purple: #b14cff;
  --blue: #3d7bff;
  --green: #2bff9a;
  --orange: #ffb020;
  --red: #ff4d6d;
  --gray: #8b93a7;
  --shadow: 0 10px 40px rgba(0, 0, 0, 0.35);
  --sidebar-w: 260px;
  --sidebar-collapsed: 78px;
  --radius: 16px;
  --font: "Segoe UI", "Trebuchet MS", "Gill Sans", sans-serif;
  --display: "Segoe UI Semibold", "Segoe UI", sans-serif;
}

html[data-theme="light"] {
  --bg: #f3f6fb;
  --bg-soft: #ffffff;
  --panel: #ffffff;
  --panel-2: #f7f9fc;
  --text: #132039;
  --muted: #5b6b86;
  --border: rgba(45, 90, 160, 0.18);
  --shadow: 0 10px 30px rgba(20, 40, 80, 0.08);
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  font-family: var(--font);
  background:
    radial-gradient(1200px 600px at 10% -10%, rgba(0, 229, 255, 0.12), transparent 60%),
    radial-gradient(900px 500px at 100% 0%, rgba(177, 76, 255, 0.12), transparent 55%),
    var(--bg);
  color: var(--text);
  min-height: 100vh;
}

a { color: var(--cyan); text-decoration: none; }
a:hover { color: #7ef7ff; }
button, input, select, textarea { font: inherit; }

.app-shell { display: flex; min-height: 100vh; }

.sidebar {
  width: var(--sidebar-w);
  background: linear-gradient(180deg, #0b1224, #0a1020 60%, #09101d);
  border-right: 1px solid var(--border);
  position: fixed;
  inset: 0 auto 0 0;
  z-index: 40;
  transition: width .25s ease, transform .25s ease;
  overflow: hidden;
}
.sidebar.collapsed { width: var(--sidebar-collapsed); }
.sidebar-brand {
  display: flex; align-items: center; gap: 12px;
  padding: 20px 18px; border-bottom: 1px solid var(--border);
}
.brand-mark {
  width: 42px; height: 42px; border-radius: 12px;
  background: linear-gradient(135deg, var(--cyan), var(--purple));
  box-shadow: 0 0 18px rgba(0, 229, 255, 0.35);
  display: grid; place-items: center; color: #041018; font-weight: 800;
  flex: 0 0 auto;
}
.brand-text { white-space: nowrap; }
.brand-text strong { display: block; font-size: 13px; letter-spacing: .04em; }
.brand-text span { color: var(--muted); font-size: 11px; }
.sidebar.collapsed .brand-text,
.sidebar.collapsed .nav-label { display: none; }

.nav { padding: 14px 10px; display: flex; flex-direction: column; gap: 4px; }
.nav a {
  display: flex; align-items: center; gap: 12px;
  padding: 12px 14px; border-radius: 12px; color: var(--muted);
  border: 1px solid transparent; transition: .2s ease;
}
.nav a:hover, .nav a.active {
  color: var(--text);
  background: rgba(0, 229, 255, 0.08);
  border-color: rgba(0, 229, 255, 0.25);
  box-shadow: inset 0 0 18px rgba(0, 229, 255, 0.08);
}
.nav-ico {
  width: 22px; text-align: center; flex: 0 0 auto; color: var(--cyan);
}

.main {
  margin-left: var(--sidebar-w);
  width: calc(100% - var(--sidebar-w));
  transition: margin-left .25s ease, width .25s ease;
  min-width: 0;
}
.app-shell.sidebar-collapsed .main {
  margin-left: var(--sidebar-collapsed);
  width: calc(100% - var(--sidebar-collapsed));
}

.topbar {
  position: sticky; top: 0; z-index: 30;
  display: flex; align-items: center; justify-content: space-between; gap: 12px;
  padding: 14px 20px;
  backdrop-filter: blur(14px);
  background: rgba(7, 11, 22, 0.72);
  border-bottom: 1px solid var(--border);
}
html[data-theme="light"] .topbar { background: rgba(255,255,255,.8); }
.topbar-left, .topbar-right { display: flex; align-items: center; gap: 10px; }
.page-title { margin: 0; font-family: var(--display); font-size: 1.15rem; }

.icon-btn, .btn {
  border: 1px solid var(--border);
  background: var(--panel);
  color: var(--text);
  border-radius: 12px;
  padding: 10px 14px;
  cursor: pointer;
  transition: .2s ease;
}
.icon-btn { width: 42px; height: 42px; display: grid; place-items: center; padding: 0; }
.btn:hover, .icon-btn:hover {
  border-color: rgba(0,229,255,.45);
  box-shadow: 0 0 16px rgba(0,229,255,.18);
}
.btn-primary {
  background: linear-gradient(135deg, rgba(0,229,255,.2), rgba(177,76,255,.25));
  border-color: rgba(0,229,255,.45);
  color: #fff;
}
.btn-danger { border-color: rgba(255,77,109,.45); color: #ffd0d9; }
.btn-success { border-color: rgba(43,255,154,.4); color: #bffff0; }
.btn-sm { padding: 7px 10px; font-size: .86rem; border-radius: 10px; }

.content { padding: 20px; }

.cards {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 14px;
}
.stat-card {
  background: linear-gradient(180deg, var(--panel), var(--panel-2));
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px;
  box-shadow: var(--shadow);
  position: relative;
  overflow: hidden;
}
.stat-card::before {
  content: "";
  position: absolute; inset: 0 auto auto 0; width: 100%; height: 2px;
  background: linear-gradient(90deg, var(--cyan), var(--purple), var(--blue));
}
.stat-card .label { color: var(--muted); font-size: .85rem; }
.stat-card .value { font-size: 1.35rem; font-weight: 700; margin-top: 8px; }
.stat-card .hint { color: var(--muted); font-size: .75rem; margin-top: 6px; }

.panel {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 16px;
  margin-top: 16px;
}
.panel-header {
  display: flex; align-items: center; justify-content: space-between; gap: 12px;
  margin-bottom: 14px; flex-wrap: wrap;
}
.panel h2, .panel h3 { margin: 0; font-size: 1rem; }

.charts {
  display: grid;
  grid-template-columns: repeat(2, minmax(0,1fr));
  gap: 14px;
  margin-top: 16px;
}
.chart-box { min-height: 280px; }
.chart-box canvas { max-width: 100%; }

.table-wrap { overflow-x: auto; }
table.data {
  width: 100%; border-collapse: collapse; min-width: 760px;
}
table.data th, table.data td {
  padding: 12px 10px; border-bottom: 1px solid rgba(143,163,196,.15);
  text-align: left; vertical-align: middle; font-size: .92rem;
}
table.data th { color: var(--muted); font-weight: 600; white-space: nowrap; }
table.data tr:hover td { background: rgba(0,229,255,.04); }

.badge {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 4px 10px; border-radius: 999px; font-size: .78rem;
  border: 1px solid transparent;
}
.badge-paid { color: #9dffd4; border-color: rgba(43,255,154,.35); background: rgba(43,255,154,.08); }
.badge-partial { color: #ffd59a; border-color: rgba(255,176,32,.4); background: rgba(255,176,32,.1); }
.badge-pending { color: #9ec4ff; border-color: rgba(61,123,255,.4); background: rgba(61,123,255,.1); }
.badge-overdue { color: #ffb3c1; border-color: rgba(255,77,109,.45); background: rgba(255,77,109,.12); }
.badge-cancelled { color: #c5cad6; border-color: rgba(139,147,167,.4); background: rgba(139,147,167,.1); }

.progress {
  height: 10px; border-radius: 999px; background: rgba(143,163,196,.15); overflow: hidden;
}
.progress > span {
  display: block; height: 100%;
  background: linear-gradient(90deg, var(--cyan), var(--purple));
  box-shadow: 0 0 12px rgba(0,229,255,.35);
}

.form-grid {
  display: grid; grid-template-columns: repeat(2, minmax(0,1fr)); gap: 14px;
}
.form-grid .full { grid-column: 1 / -1; }
.field { display: flex; flex-direction: column; gap: 6px; }
.field label { color: var(--muted); font-size: .86rem; }
.field input, .field select, .field textarea {
  background: var(--bg-soft);
  border: 1px solid var(--border);
  color: var(--text);
  border-radius: 12px;
  padding: 11px 12px;
  outline: none;
}
.field input:focus, .field select:focus, .field textarea:focus {
  border-color: rgba(0,229,255,.55);
  box-shadow: 0 0 0 3px rgba(0,229,255,.12);
}
.actions { display: flex; gap: 10px; flex-wrap: wrap; margin-top: 8px; }

.quick-actions { display: flex; gap: 10px; flex-wrap: wrap; margin-top: 16px; }
.filters { display: flex; gap: 10px; flex-wrap: wrap; margin-bottom: 12px; }
.filters .field { min-width: 160px; }

.toast-wrap {
  position: fixed; right: 16px; bottom: 16px; z-index: 99;
  display: flex; flex-direction: column; gap: 8px;
}
.toast {
  min-width: 260px; max-width: 420px;
  padding: 12px 14px; border-radius: 12px;
  border: 1px solid var(--border); background: var(--panel);
  box-shadow: var(--shadow); animation: slideIn .25s ease;
}
.toast.success { border-color: rgba(43,255,154,.4); }
.toast.error { border-color: rgba(255,77,109,.45); }
@keyframes slideIn { from { transform: translateY(10px); opacity: 0; } to { transform: none; opacity: 1; } }

.user-chip {
  display: flex; align-items: center; gap: 8px;
  padding: 6px 10px; border-radius: 12px; border: 1px solid var(--border);
  background: var(--panel);
}
.notif {
  position: relative;
}
.notif .dot {
  position: absolute; top: 6px; right: 6px;
  width: 8px; height: 8px; border-radius: 50%;
  background: var(--red); box-shadow: 0 0 8px var(--red);
}

.login-wrap {
  min-height: 100vh; display: grid; place-items: center; padding: 20px;
}
.login-card {
  width: min(420px, 100%);
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 28px;
  box-shadow: var(--shadow);
}
.login-card h1 {
  margin: 0 0 6px; font-size: 1.4rem;
  background: linear-gradient(90deg, var(--cyan), var(--purple));
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.login-card p { color: var(--muted); margin-top: 0; }

.wa-btn {
  background: rgba(37, 211, 102, .12);
  border-color: rgba(37, 211, 102, .4);
  color: #9dffc2;
}
.row-overdue { background: rgba(255,77,109,.06) !important; }
.muted { color: var(--muted); }
.mt-0 { margin-top: 0; }
.mb-0 { margin-bottom: 0; }
.flex { display: flex; gap: 10px; align-items: center; }
.space-between { justify-content: space-between; }
.wrap { flex-wrap: wrap; }

.sidebar-backdrop {
  display: none; position: fixed; inset: 0; background: rgba(0,0,0,.45); z-index: 35;
}

@media (max-width: 1100px) {
  .cards { grid-template-columns: repeat(2, minmax(0,1fr)); }
  .charts { grid-template-columns: 1fr; }
}
@media (max-width: 860px) {
  .sidebar {
    transform: translateX(-105%);
    width: min(84vw, 280px) !important;
  }
  .sidebar.open { transform: translateX(0); }
  .main, .app-shell.sidebar-collapsed .main {
    margin-left: 0; width: 100%;
  }
  .sidebar-backdrop.show { display: block; }
  .form-grid { grid-template-columns: 1fr; }
  .cards { grid-template-columns: 1fr; }
  .content { padding: 14px; }
}

@media print {
  .sidebar, .topbar, .no-print { display: none !important; }
  .main { margin: 0 !important; width: 100% !important; }
  body { background: #fff; color: #000; }
  .panel, .stat-card { box-shadow: none; border-color: #ccc; }
}