:root {
  --bg: #eef2f7;
  --surface: #ffffff;
  --surface-soft: #f7f9fc;
  --line: #d7dee8;
  --text: #1d2733;
  --muted: #66758a;
  --primary: #0a4f97;
  --primary-soft: #e8f1fb;
  --danger: #b43232;
  --success: #1f7a43;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at 10% 20%, rgba(15, 103, 189, 0.08), transparent 30%),
    radial-gradient(circle at 85% 10%, rgba(31, 122, 67, 0.08), transparent 28%),
    linear-gradient(180deg, #f8fbff 0%, var(--bg) 100%);
  background-size: 100% 100%, 100% 100%, 100% 100%;
  animation: bgFloat 14s ease-in-out infinite alternate;
}

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

.topbar {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--line);
  padding: 14px 28px;
  animation: slideDown 0.55s ease;
}

.brand-wrap { display: grid; gap: 3px; }

.eyebrow {
  margin: 0;
  color: var(--muted);
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

h1 {
  margin: 0;
  font-size: 22px;
  font-weight: 700;
}

.topnav {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}

.nav-link {
  text-decoration: none;
  color: #27415f;
  font-weight: 600;
  font-size: 14px;
  padding: 8px 12px;
  border-radius: 8px;
  border: 1px solid transparent;
  transition: all 0.2s ease;
}

.nav-link:hover {
  background: var(--surface-soft);
  border-color: var(--line);
}

.nav-link.active {
  background: var(--primary-soft);
  color: var(--primary);
  border-color: #c9dbf2;
}

.nav-link.danger { color: var(--danger); }
.logout-form { margin: 0; }
.nav-btn {
  background: transparent;
  cursor: pointer;
  font-family: inherit;
}

.main-content {
  width: 100%;
  padding: 22px 28px;
}

.panel {
  width: 100%;
  min-height: calc(100vh - 110px);
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 24px;
  box-shadow: 0 12px 32px rgba(16, 37, 63, 0.06);
  animation: fadeUp 0.45s ease;
}

.auth-screen .main-content {
  display: grid;
  place-items: center;
}

.auth-panel {
  width: min(100%, 560px);
  min-height: auto;
  padding: 30px;
  border-radius: 14px;
  box-shadow: 0 18px 40px rgba(10, 35, 70, 0.12);
}

.auth-head h2 {
  margin: 0 0 8px;
  font-size: 30px;
  color: #183657;
}

.auth-foot {
  margin-top: 16px;
  color: var(--muted);
  font-size: 14px;
}

.subtitle { color: var(--muted); margin: 0 0 16px; line-height: 1.6; }

.auth-form { display: grid; gap: 14px; max-width: 640px; }
.field { display: grid; gap: 8px; }

label { font-size: 14px; color: var(--text); font-weight: 600; }

input {
  width: 100%;
  border: 1px solid #cfd8e4;
  border-radius: 8px;
  padding: 11px 12px;
  background: #fff;
  color: var(--text);
  outline: none;
}

input:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(10, 79, 151, 0.14);
}

.btn-primary {
  border: 0;
  border-radius: 8px;
  padding: 11px 15px;
  cursor: pointer;
  font-weight: 600;
  color: #fff;
  background: linear-gradient(135deg, #0f67bd, #0a4f97);
  transition: transform 0.2s ease, filter 0.2s ease, box-shadow 0.2s ease;
}

.btn-primary:hover {
  filter: brightness(0.95);
  transform: translateY(-1px);
  box-shadow: 0 8px 18px rgba(10, 79, 151, 0.28);
}
.inline-btn { display: inline-block; text-decoration: none; text-align: center; }

.error { color: var(--danger); font-size: 13px; }
.block { display: block; }

.link-ghost { color: var(--primary); text-decoration: none; font-weight: 600; }
.link-ghost:hover { text-decoration: underline; }

.alerts { margin-bottom: 16px; }
.alert {
  border-radius: 8px;
  padding: 10px 12px;
  font-size: 14px;
  border: 1px solid var(--line);
  background: var(--surface-soft);
}
.alert.success { border-color: #b9e0c8; color: var(--success); }
.alert.error { border-color: #efc6c6; color: var(--danger); }

.metric-card {
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 16px;
  margin-bottom: 14px;
  background: linear-gradient(180deg, #fff, #fbfdff);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.metric-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 24px rgba(10, 38, 70, 0.08);
}

.metric-label {
  margin: 0;
  font-size: 12px;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.07em;
}

.metric-value { margin: 8px 0 0; font-size: 32px; font-weight: 700; }
.table-title { margin: 14px 0 8px; font-size: 16px; }
.chart-grid {
  display: grid;
  grid-template-columns: repeat(1, minmax(0, 1fr));
  gap: 14px;
}

canvas {
  width: 100% !important;
  height: 280px !important;
}

pre {
  background: #101a27;
  color: #e8eef6;
  border-radius: 8px;
  padding: 14px;
  overflow-x: auto;
  border: 1px solid #1d2b3e;
}

code { font-family: Consolas, "Courier New", monospace; font-size: 13px; }

.qr-box {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 12px;
  display: inline-block;
}

.qr-image { width: min(100%, 320px); height: auto; display: block; border-radius: 6px; }

@keyframes fadeUp {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes slideDown {
  from { opacity: 0; transform: translateY(-8px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes bgFloat {
  from { background-position: 0% 0%, 100% 0%, 0% 0%; }
  to { background-position: 4% 3%, 96% 2%, 0% 0%; }
}

@media (max-width: 900px) {
  .topbar { padding: 12px 14px; align-items: flex-start; flex-direction: column; }
  .main-content { padding: 12px 14px; }
  .panel { padding: 16px; min-height: calc(100vh - 124px); }
  .auth-panel {
    width: 100%;
    padding: 22px;
  }
  .auth-head h2 { font-size: 25px; }
}

@media (min-width: 1100px) {
  .chart-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}