/* ═══════════════════════════════════════════════════
   THEME VARIABLES
   ═══════════════════════════════════════════════════ */
:root {
  --bg: #0C0F14;
  --surface: #151921;
  --surface2: #1C2230;
  --border: #2A3040;
  --text: #E8ECF2;
  --text-dim: #8891A0;
  --text-muted: #5A6375;
  --accent: #4E9FFF;
  --accent-dim: rgba(78,159,255,0.12);
  --green: #34D399;
  --green-dim: rgba(52,211,153,0.12);
  --yellow: #FBBF24;
  --yellow-dim: rgba(251,191,36,0.12);
  --red: #F87171;
  --red-dim: rgba(248,113,113,0.12);
  --radius: 12px;
  --radius-sm: 8px;
  --input-bg: var(--surface);
  --shadow: none;
}

[data-theme="light"] {
  --bg: #F4F5F7;
  --surface: #FFFFFF;
  --surface2: #EBEDF2;
  --border: #D4D8E0;
  --text: #1A1D24;
  --text-dim: #5A6070;
  --text-muted: #8891A0;
  --accent: #2B7FE0;
  --accent-dim: rgba(43,127,224,0.10);
  --green: #16A76A;
  --green-dim: rgba(22,167,106,0.10);
  --yellow: #D49A08;
  --yellow-dim: rgba(212,154,8,0.10);
  --red: #DC4444;
  --red-dim: rgba(220,68,68,0.10);
  --input-bg: #FFFFFF;
  --shadow: 0 1px 3px rgba(0,0,0,0.06);
}

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

body {
  font-family: 'DM Sans', sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100dvh;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
  transition: background 0.25s, color 0.25s;
}

a { color: var(--accent); text-decoration: none; }

.container { padding: 16px 16px 100px; max-width: 480px; margin: 0 auto; }

/* ─── Header ─── */
.app-header {
  display: flex; align-items: center; justify-content: space-between;
  padding: 16px 0 20px;
}
.app-header h1 {
  font-family: 'JetBrains Mono', monospace;
  font-size: 20px; font-weight: 600; letter-spacing: -0.5px;
  color: var(--accent);
}
.header-right { display: flex; align-items: center; gap: 8px; }
.user-badge {
  font-size: 12px; color: var(--text-dim);
  background: var(--surface2); padding: 6px 12px;
  border-radius: 20px; cursor: pointer;
  border: 1px solid var(--border);
  text-decoration: none;
}

/* ─── Theme Toggle ─── */
.theme-toggle {
  width: 38px; height: 38px;
  border-radius: 50%; border: 1px solid var(--border);
  background: var(--surface2); cursor: pointer;
  display: flex; align-items: center; justify-content: center;
  font-size: 16px; line-height: 1;
  -webkit-tap-highlight-color: transparent;
  transition: background 0.2s;
}

/* ─── Status Banner ─── */
.status-banner {
  border-radius: var(--radius);
  padding: 16px 18px;
  display: flex; align-items: center; gap: 12px;
  margin-bottom: 16px;
  font-weight: 600; font-size: 15px;
  box-shadow: var(--shadow);
}
.status-banner .dot {
  width: 12px; height: 12px; border-radius: 50%;
  flex-shrink: 0;
  animation: pulse 2s infinite;
}
@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.5; }
}
.status-green { background: var(--green-dim); color: var(--green); }
.status-green .dot { background: var(--green); }
.status-yellow { background: var(--yellow-dim); color: var(--yellow); }
.status-yellow .dot { background: var(--yellow); }
.status-red { background: var(--red-dim); color: var(--red); }
.status-red .dot { background: var(--red); }

/* ─── Stats Grid ─── */
.stats-grid {
  display: grid; grid-template-columns: 1fr 1fr;
  gap: 10px; margin-bottom: 10px;
}
.stat-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 14px 16px;
  box-shadow: var(--shadow);
}
.stat-card .label {
  font-size: 11px; color: var(--text-muted);
  text-transform: uppercase; letter-spacing: 0.8px;
  margin-bottom: 4px;
}
.stat-card .value {
  font-family: 'JetBrains Mono', monospace;
  font-size: 22px; font-weight: 600;
}
.stat-card .value.warn { color: var(--yellow); }
.stat-card .value.danger { color: var(--red); }
.stat-card-wide {
  display: flex; align-items: center; justify-content: space-between;
  margin-bottom: 16px;
}
.stat-card-wide .label { margin-bottom: 0; }
.db-value {
  font-family: 'JetBrains Mono', monospace;
  font-size: 14px; font-weight: 600;
}
.db-ok { color: var(--green); }
.db-expired { color: var(--red); }
.db-unset { color: var(--text-muted); }

/* ─── Section ─── */
.section-title {
  font-size: 13px; color: var(--text-muted);
  text-transform: uppercase; letter-spacing: 1px;
  margin: 20px 0 10px; font-weight: 600;
}

/* ─── Flight Row ─── */
.flight-row {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 12px 14px;
  margin-bottom: 8px;
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 8px 12px; align-items: center;
  box-shadow: var(--shadow);
}
.flight-row .date {
  font-family: 'JetBrains Mono', monospace;
  font-size: 13px; color: var(--accent);
}
.flight-row .route { font-size: 14px; font-weight: 500; }
.flight-row .pilot { font-size: 12px; color: var(--text-dim); grid-column: 2; }
.flight-row .hours {
  font-family: 'JetBrains Mono', monospace;
  font-size: 14px; font-weight: 600;
  color: var(--text-dim);
  grid-row: 1 / 3; grid-column: 3;
  text-align: right;
}

/* ─── Buttons ─── */
.actions { display: flex; flex-direction: column; gap: 10px; margin-top: 20px; }
.btn {
  display: flex; align-items: center; justify-content: center; gap: 8px;
  width: 100%; padding: 16px;
  border: none; border-radius: var(--radius);
  font-family: 'DM Sans', sans-serif;
  font-size: 15px; font-weight: 600;
  cursor: pointer; transition: all 0.15s;
  -webkit-tap-highlight-color: transparent;
  text-decoration: none;
}
.btn:active { transform: scale(0.98); }
.btn-primary { background: var(--accent); color: #fff; }
.btn-secondary { background: var(--surface2); color: var(--text); border: 1px solid var(--border); }
.btn-danger { background: var(--red-dim); color: var(--red); border: 1px solid rgba(248,113,113,0.2); }
.btn-success { background: var(--green-dim); color: var(--green); border: 1px solid rgba(52,211,153,0.2); }
.btn-warn { background: var(--yellow-dim); color: var(--yellow); border: 1px solid rgba(251,191,36,0.2); }
.btn:disabled { opacity: 0.4; pointer-events: none; }
.btn-sm { padding: 10px 16px; font-size: 13px; width: auto; display: inline-flex; }

/* ─── Forms ─── */
.form-group { margin-bottom: 16px; }
.form-group label {
  display: block; font-size: 12px; color: var(--text-dim);
  text-transform: uppercase; letter-spacing: 0.6px;
  margin-bottom: 6px; font-weight: 500;
}
.form-group input,
.form-group select,
.form-group textarea {
  width: 100%; padding: 14px 16px;
  background: var(--input-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text);
  font-family: 'DM Sans', sans-serif;
  font-size: 16px;
  -webkit-appearance: none;
  transition: border-color 0.15s;
}
.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--accent);
}
.form-group input[readonly] { opacity: 0.6; }
.form-group textarea { resize: vertical; min-height: 80px; }
.form-group .hint { font-size: 12px; color: var(--text-muted); margin-top: 4px; }
.form-group select {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8'%3E%3Cpath d='M1 1l5 5 5-5' stroke='%238891A0' fill='none' stroke-width='1.5'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 14px center;
  padding-right: 36px;
}

.two-col { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }

.calculated {
  font-family: 'JetBrains Mono', monospace;
  background: var(--accent-dim);
  color: var(--accent);
  padding: 12px 16px;
  border-radius: var(--radius-sm);
  font-size: 14px; font-weight: 500;
  margin-bottom: 16px;
}

.info-box {
  background: var(--surface);
  border-left: 3px solid var(--accent);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  padding: 12px 14px;
  font-size: 13px; color: var(--text-dim);
  line-height: 1.5;
  margin-bottom: 16px;
  box-shadow: var(--shadow);
}
.info-box.warn-box { border-left-color: var(--yellow); }

.checkbox-row {
  display: flex; align-items: flex-start; gap: 12px;
  padding: 14px 16px;
  background: var(--yellow-dim);
  border-radius: var(--radius-sm);
  margin-bottom: 16px;
}
.checkbox-row input[type="checkbox"] {
  width: 22px; height: 22px; flex-shrink: 0;
  accent-color: var(--accent); margin-top: 1px;
}
.checkbox-row span { font-size: 14px; color: var(--yellow); font-weight: 500; }

/* ─── Cards ─── */
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 14px 16px;
  margin-bottom: 10px;
  box-shadow: var(--shadow);
}
.card-header {
  display: flex; align-items: center; justify-content: space-between;
  margin-bottom: 8px;
}
.card .desc { font-size: 14px; line-height: 1.5; margin-bottom: 6px; }
.card .meta-line { font-size: 12px; color: var(--text-muted); margin-bottom: 2px; }
.card.dimmed { opacity: 0.65; }

.severity-badge {
  font-size: 11px; font-weight: 600;
  text-transform: uppercase; letter-spacing: 0.5px;
  padding: 3px 10px; border-radius: 20px;
}
.sev-low { background: var(--green-dim); color: var(--green); }
.sev-mod { background: var(--accent-dim); color: var(--accent); }
.sev-high { background: var(--yellow-dim); color: var(--yellow); }
.sev-grounding { background: var(--red-dim); color: var(--red); }

/* Maintenance status */
.maint-status {
  font-size: 11px; font-weight: 600;
  text-transform: uppercase; letter-spacing: 0.5px;
  padding: 3px 10px; border-radius: 20px;
}
.maint-ok { background: var(--green-dim); color: var(--green); }
.maint-soon { background: var(--yellow-dim); color: var(--yellow); }
.maint-overdue { background: var(--red-dim); color: var(--red); }

.maint-detail { font-size: 13px; color: var(--text-dim); line-height: 1.6; }
.maint-detail span { font-family: 'JetBrains Mono', monospace; color: var(--text); }

/* ─── Login ─── */
.login-wrapper {
  display: flex; flex-direction: column;
  align-items: center; justify-content: center;
  min-height: 100dvh; padding: 24px;
}
.login-box { width: 100%; max-width: 360px; }
.login-box .logo {
  font-family: 'JetBrains Mono', monospace;
  font-size: 28px; font-weight: 700;
  color: var(--accent); text-align: center;
  margin-bottom: 8px;
}
.login-box .subtitle {
  text-align: center; color: var(--text-muted);
  font-size: 14px; margin-bottom: 32px;
}

/* ─── Back nav ─── */
.back-nav {
  display: flex; align-items: center; gap: 8px;
  font-size: 14px; color: var(--accent);
  cursor: pointer; padding: 12px 0 16px;
  -webkit-tap-highlight-color: transparent;
  text-decoration: none;
}
.back-nav svg { width: 18px; height: 18px; }

.page-title {
  font-size: 22px; font-weight: 700;
  margin-bottom: 20px; letter-spacing: -0.3px;
}

/* ─── Toast ─── */
.toast {
  position: fixed; bottom: 24px; left: 50%; transform: translateX(-50%);
  background: var(--green); color: #000;
  padding: 12px 24px; border-radius: 30px;
  font-size: 14px; font-weight: 600;
  z-index: 100; opacity: 0; pointer-events: none;
  transition: opacity 0.3s;
  max-width: 90vw; text-align: center;
}
.toast.show { opacity: 1; }

/* ─── Toggle Form ─── */
.toggle-section { display: none; margin-bottom: 20px; }
.toggle-section.open { display: block; }

/* ─── Engine Analysis ─── */
.tab-nav {
  display: flex; gap: 6px; margin-bottom: 16px;
}
.tab-btn {
  flex: 1; padding: 10px 8px;
  background: var(--surface2); border: 1px solid var(--border);
  border-radius: var(--radius-sm); color: var(--text-dim);
  font-family: 'DM Sans', sans-serif; font-size: 13px; font-weight: 600;
  cursor: pointer; transition: all 0.15s;
  -webkit-tap-highlight-color: transparent;
}
.tab-btn.active {
  background: var(--accent-dim); border-color: var(--accent); color: var(--accent);
}
.conditions-note {
  font-size: 12px; color: var(--text-muted);
  background: var(--card-bg); border: 1px solid var(--border);
  border-radius: 8px; padding: 8px 12px;
  margin-bottom: 14px;
}
.engine-chips {
  display: flex; gap: 8px; margin-bottom: 14px; flex-wrap: wrap;
}
.chip {
  flex: 1; min-width: 80px;
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius-sm); padding: 10px 12px;
}
.chip-label {
  font-size: 10px; color: var(--text-muted);
  text-transform: uppercase; letter-spacing: 0.7px; margin-bottom: 3px;
}
.chip-value {
  font-family: 'JetBrains Mono', monospace;
  font-size: 16px; font-weight: 600;
}
.chip-warn  { color: var(--yellow); }
.chip-danger { color: var(--red); }
.chart-card {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 14px 14px 10px;
  margin-bottom: 12px; box-shadow: var(--shadow);
}
.chart-label {
  font-size: 11px; color: var(--text-muted);
  text-transform: uppercase; letter-spacing: 0.7px;
  margin-bottom: 10px; font-weight: 600;
}
.chart-wrap { position: relative; height: 220px; }
.chart-wrap-tall { height: 280px; }
.engine-table-wrap {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius); overflow: hidden;
  margin-bottom: 12px;
}
.engine-table {
  width: 100%; border-collapse: collapse;
  font-size: 13px;
}
.engine-table th {
  background: var(--surface2); color: var(--text-muted);
  font-size: 11px; text-transform: uppercase; letter-spacing: 0.7px;
  padding: 10px 14px; text-align: left; font-weight: 600;
  border-bottom: 1px solid var(--border);
}
.engine-table td {
  padding: 10px 14px; border-bottom: 1px solid var(--border);
  font-family: 'JetBrains Mono', monospace; font-size: 12px;
}
.engine-table tr:last-child td { border-bottom: none; }
.engine-table .row-danger td { color: var(--red); }
.engine-select {
  width: 100%; padding: 10px 36px 10px 12px; margin-top: 10px;
  background: var(--input-bg);
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8'%3E%3Cpath d='M1 1l5 5 5-5' stroke='%238891A0' fill='none' stroke-width='1.5'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 12px center;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text);
  font-family: 'DM Sans', sans-serif;
  font-size: 14px;
  -webkit-appearance: none;
  cursor: pointer;
}
.engine-select:focus { outline: none; border-color: var(--accent); }
.empty-state {
  text-align: center; padding: 40px 20px;
  color: var(--text-muted); font-size: 14px;
}

/* ─── Utility ─── */
.mt-8 { margin-top: 8px; }
.mb-16 { margin-bottom: 16px; }
.text-center { text-align: center; }
.text-muted { color: var(--text-muted); font-size: 12px; }
.mono { font-family: 'JetBrains Mono', monospace; }