:root {
  --bg: #070b14;
  --bg-card: #0d1526;
  --bg-hover: #121f38;
  --border: #1e3a5f;
  --text: #e8f4ff;
  --muted: #8ba3c7;
  --cyan: #22d3ee;
  --cyan-dim: #0891b2;
  --green: #34d399;
  --red: #f87171;
  --radius: 12px;
  --shadow: 0 8px 32px rgba(0, 0, 0, 0.45);
  font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

body {
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  line-height: 1.5;
}

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

.container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 22px;
  border-radius: 10px;
  border: none;
  font-weight: 600;
  cursor: pointer;
  font-size: 15px;
  transition: transform .15s, box-shadow .15s;
}
.btn:hover { transform: translateY(-1px); }
.btn-primary {
  background: linear-gradient(135deg, var(--cyan), var(--cyan-dim));
  color: #041018;
  box-shadow: 0 4px 20px rgba(34, 211, 238, 0.35);
}
.btn-secondary {
  background: var(--bg-hover);
  color: var(--text);
  border: 1px solid var(--border);
}
.btn-danger { background: #7f1d1d; color: #fecaca; }
.btn-sm { padding: 8px 14px; font-size: 13px; }

.badge {
  display: inline-block;
  padding: 4px 10px;
  border-radius: 999px;
  font-size: 12px;
  font-weight: 600;
}
.badge-ok { background: rgba(52, 211, 153, 0.15); color: var(--green); }
.badge-err { background: rgba(248, 113, 113, 0.15); color: var(--red); }
.badge-muted { background: rgba(139, 163, 199, 0.15); color: var(--muted); }

.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  box-shadow: var(--shadow);
}

.grid { display: grid; gap: 20px; }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }
@media (max-width: 900px) {
  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
}

.form-group { margin-bottom: 16px; }
.form-label {
  display: block;
  font-size: 13px;
  color: var(--muted);
  margin-bottom: 6px;
}
.form-input, .form-select {
  width: 100%;
  padding: 12px 14px;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: #0a1220;
  color: var(--text);
  font-size: 15px;
}
.form-input:focus, .form-select:focus {
  outline: none;
  border-color: var(--cyan);
  box-shadow: 0 0 0 3px rgba(34, 211, 238, 0.15);
}

.table-wrap { overflow-x: auto; border-radius: var(--radius); border: 1px solid var(--border); }
table { width: 100%; border-collapse: collapse; }
th {
  background: linear-gradient(135deg, #0f2847, #0d3d5c);
  color: var(--cyan);
  text-align: left;
  padding: 12px 14px;
  font-size: 13px;
}
td { padding: 12px 14px; border-top: 1px solid var(--border); font-size: 14px; }
tr:hover td { background: var(--bg-hover); }

.kpi-value { font-size: 28px; font-weight: 700; color: var(--cyan); }
.kpi-label { font-size: 13px; color: var(--muted); margin-top: 4px; }

.alert {
  padding: 12px 16px;
  border-radius: 10px;
  margin-bottom: 16px;
  font-size: 14px;
}
.alert-error { background: rgba(248,113,113,.12); border: 1px solid #7f1d1d; color: #fecaca; }
.alert-ok { background: rgba(52,211,153,.12); border: 1px solid #065f46; color: #a7f3d0; }

/* Landing */
.hero {
  min-height: 88vh;
  display: flex;
  align-items: center;
  background:
    radial-gradient(ellipse at 20% 20%, rgba(34,211,238,.12), transparent 50%),
    radial-gradient(ellipse at 80% 60%, rgba(8,145,178,.1), transparent 45%),
    var(--bg);
}
.hero-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 48px; align-items: center; }
@media (max-width: 900px) { .hero-grid { grid-template-columns: 1fr; } }
.hero h1 { font-size: 42px; line-height: 1.15; margin-bottom: 16px; }
.hero h1 span { color: var(--cyan); }
.hero p { color: var(--muted); font-size: 18px; margin-bottom: 28px; }
.hero-logo { width: 100%; max-width: 380px; border-radius: 50%; box-shadow: 0 0 60px rgba(34,211,238,.25); }

.features { padding: 80px 0; }
.features h2 { text-align: center; font-size: 32px; margin-bottom: 16px; }
.features-lead {
  text-align: center;
  color: var(--muted);
  font-size: 17px;
  max-width: 560px;
  margin: 0 auto 40px;
  line-height: 1.5;
}
.feature-card h3 { color: var(--cyan); margin-bottom: 8px; }
.feature-card p { color: var(--muted); font-size: 14px; }

.steps { counter-reset: step; }
.step {
  display: flex; gap: 16px; margin-bottom: 20px; align-items: flex-start;
}
.step-num {
  width: 36px; height: 36px; border-radius: 50%;
  background: var(--cyan-dim); color: #fff;
  display: flex; align-items: center; justify-content: center; font-weight: 700; flex-shrink: 0;
}

footer {
  border-top: 1px solid var(--border);
  padding: 40px 0;
  text-align: center;
  color: var(--muted);
  font-size: 14px;
}
footer strong { color: var(--cyan); display: block; font-size: 18px; margin-bottom: 4px; }

/* App layout */
.app-shell { display: flex; min-height: 100vh; }
.sidebar {
  width: 260px;
  background: var(--bg-card);
  border-right: 1px solid var(--border);
  padding: 24px 16px;
  flex-shrink: 0;
}
.sidebar-brand {
  display: flex; align-items: center; gap: 12px;
  margin-bottom: 32px; padding: 0 8px;
}
.sidebar-brand img { width: 44px; height: 44px; border-radius: 50%; }
.sidebar-brand span { font-weight: 700; color: var(--cyan); }
.nav-link {
  display: block; padding: 12px 14px; border-radius: 10px;
  color: var(--muted); margin-bottom: 4px; font-size: 14px;
}
.nav-link:hover, .nav-link.active {
  background: var(--bg-hover); color: var(--cyan); text-decoration: none;
}
.main { flex: 1; padding: 28px 32px; overflow-x: hidden; }
.topbar {
  display: flex; justify-content: space-between; align-items: center;
  margin-bottom: 28px; flex-wrap: wrap; gap: 12px;
}
.topbar h1 { font-size: 26px; }

.tabs { display: flex; gap: 8px; margin-bottom: 20px; flex-wrap: wrap; }
.tab-btn {
  padding: 10px 18px; border-radius: 10px; border: 1px solid var(--border);
  background: transparent; color: var(--muted); cursor: pointer;
}
.tab-btn.active { background: var(--cyan-dim); color: #fff; border-color: var(--cyan); }

.modal-backdrop {
  position: fixed; inset: 0; background: rgba(0,0,0,.65);
  display: none; align-items: center; justify-content: center; z-index: 100;
}
.modal-backdrop.open { display: flex; }
.modal {
  background: var(--bg-card); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 28px; width: 100%; max-width: 520px;
  max-height: 90vh; overflow-y: auto;
}
.modal h2 { margin-bottom: 20px; }

.chart-bar {
  display: flex; align-items: flex-end; gap: 6px; height: 180px; padding-top: 12px;
}
.chart-bar .bar {
  flex: 1; background: linear-gradient(180deg, var(--cyan), var(--cyan-dim));
  border-radius: 6px 6px 0 0; min-height: 4px; position: relative;
}
.chart-bar .bar-label {
  position: absolute; bottom: -22px; left: 50%; transform: translateX(-50%);
  font-size: 10px; color: var(--muted); white-space: nowrap;
}

.loading { color: var(--muted); padding: 40px; text-align: center; }