/* ===== Golden Hour Theme - Blue & Yellow ===== */
:root {
  /* Brand Palette */
  --brand-primary: #f59e0b; /* Amber/Golden Yellow */
  --brand-primary-hover: #d97706;
  --brand-gradient: linear-gradient(45deg, #f59e0b, #fbbf24);

  /* Greys/Slate Palette */
  --slate-50: #f8fafc;
  --slate-100: #f1f5f9;
  --slate-200: #e2e8f0;
  --slate-400: #94a3b8;
  --slate-600: #475569;
  --slate-800: #1e293b;

  /* Status Palette */
  --status-green: #15803d;
  --status-green-bg: #f0fdf4;
  --status-amber: #b45309;
  --status-amber-bg: #fffbeb;
  --status-crimson: #be123c;
  --status-crimson-bg: #fff1f2;
  --status-sky: #0369a1;
  --status-sky-bg: #f0f9ff;

  /* Global Settings */
  --body-bg: #f0f9ff; /* Light Sky Blue Background */
  --card-bg: #ffffff;
  --text-dark: var(--slate-800);
  --text-muted: var(--slate-600);
  --border-color: var(--slate-200);
}

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

main.container {
  flex: 1;
}

/* ===== Header & Footer ===== */
.site-header {
  background-color: var(--card-bg);
  padding: 1rem 0;
  position: sticky;
  top: 0;
  z-index: 10;
  /* A subtle shadow to lift the header */
  box-shadow: 0 4px 6px -1px rgb(0 0 0 / 0.05), 0 2px 4px -2px rgb(0 0 0 / 0.05);
}
.site-footer {
  background-color: transparent;
  border-top: 1px solid var(--border-color);
  padding: 2.5rem 0;
  margin-top: 2rem;
}
.site-footer small {
  color: var(--slate-400);
}

/* ===== Buttons ===== */
.btn {
  border-radius: 8px;
  font-weight: 600;
  transition: all 0.25s ease;
  border: 1px solid transparent;
  padding: 0.6rem 1.25rem;
}
.btn-lg {
  padding: 0.8rem 1.75rem;
  font-size: 1.05rem;
}
.btn-primary {
  background-image: var(--brand-gradient);
  color: white;
  border: none;
}
.btn-primary:hover, .btn-primary:focus {
  color: white;
  box-shadow: 0 5px 15px rgba(245, 158, 11, 0.3);
  transform: translateY(-3px);
}
.btn-secondary {
    background-color: #fff;
    border-color: var(--border-color);
    color: var(--slate-800);
}
.btn-secondary:hover {
    background-color: var(--slate-50);
    border-color: var(--slate-400);
    color: var(--slate-800);
}

/* ===== Home Page Lookup Card ===== */
.lookup-card {
  background-color: var(--card-bg);
  border-radius: 20px;
  padding: 48px;
  border: 1px solid var(--border-color);
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.05);
}
.lookup-header { text-align: center; margin-bottom: 36px; }
.lookup-header .bi {
  font-size: 52px;
  color: var(--brand-primary);
  margin-bottom: 16px;
}
.lookup-title { font-size: 32px; font-weight: 800; margin-bottom: 8px; }
.lookup-subtitle { font-size: 18px; color: var(--text-muted); max-width: 400px; margin: 0 auto; }
.lookup-footer { text-align: center; margin-top: 32px; padding-top: 24px; border-top: 1px solid var(--border-color); }
.lookup-footer p { color: var(--text-muted); font-size: 14px; display: inline-flex; align-items: center; gap: 8px; }
.form-label { font-weight: 600; font-size: 14px; color: var(--text-dark); margin-bottom: 8px; }
.form-control-lg {
  padding: 1.1rem 1.25rem; font-size: 1rem; background-color: var(--slate-50);
  border: 1px solid var(--border-color); border-radius: 10px;
  transition: all 0.2s ease;
}
.form-control-lg:focus {
  background-color: #fff; border-color: var(--brand-primary);
  box-shadow: 0 0 0 4px rgba(245, 158, 11, 0.2);
}

/* ===== Results Page: Status Header ===== */
.status-header {
  border-radius: 16px;
  padding: 28px;
  display: flex;
  align-items: center;
  gap: 24px;
  margin-bottom: 24px;
  border: 1px solid;
}
.status-header .icon { font-size: 40px; line-height: 1; }
.status-header .title { font-size: 26px; font-weight: 700; margin-bottom: 2px; }
.status-header .subtitle { font-size: 16px; opacity: 0.9; }
.status-header .meta { text-align: right; margin-left: auto; }
.status-header .meta-label { font-size: 14px; font-weight: 600; opacity: 0.8; }
.status-header .meta-value { font-size: 20px; font-weight: 700; font-family: monospace; letter-spacing: 0.5px; }

/* Status Header Variants */
.status-header.active { background-color: var(--status-green-bg); color: var(--status-green); border-color: var(--status-green); }
.status-header.expiring { background-color: var(--status-amber-bg); color: var(--status-amber); border-color: var(--status-amber); }
.status-header.expired { background-color: var(--status-crimson-bg); color: var(--status-crimson); border-color: var(--status-crimson); }
.status-header.unknown { background-color: var(--status-sky-bg); color: var(--status-sky); border-color: var(--status-sky); }

/* ===== Results Page: Actions & Info Cards ===== */
.actions-bar { display: flex; gap: 12px; flex-wrap: wrap; align-items: center; margin-bottom: 24px; }
.info-card {
  background: var(--card-bg);
  border: 1px solid var(--border-color);
  border-radius: 16px;
  margin-bottom: 1.5rem;
  box-shadow: 0 4px 15px rgba(0,0,0,0.03);
}
.info-card .card-body { padding: 28px; }
.info-card .section-title {
  font-size: 20px;
  font-weight: 700;
  color: var(--text-dark);
  margin-bottom: 20px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--border-color);
}

/* Key-Value Grid */
.kv-grid { display: grid; grid-template-columns: 1fr; gap: 20px; }
@media (min-width: 768px) {
  .kv-grid { grid-template-columns: 1fr 1fr; }
}
.kv .k { color: var(--text-muted); font-size: 14px; margin-bottom: 6px; }
.kv .v { font-weight: 600; font-size: 16px; color: var(--text-dark); }
.serial-pill {
  background: var(--slate-100);
  color: var(--slate-800);
  padding: 6px 12px;
  border-radius: 8px;
  font-family: monospace;
  font-size: 15px;
  font-weight: 700;
  border: 1px solid var(--slate-200);
}

/* Responsive */
@media (max-width: 768px) {
  .lookup-card { padding: 24px; }
  .status-header { flex-direction: column; align-items: flex-start; gap: 16px; text-align: left; }
  .status-header .meta { text-align: left; margin-left: 0; margin-top: 12px; }
  .kv-grid { grid-template-columns: 1fr; }
}