/* ============================================================
   SSL Certificate Decoder — Cyan Dark Theme
   ============================================================ */

:root {
  --primary: #06B6D4;
  --primary-dim: rgba(6, 182, 212, 0.12);
  --secondary: #22D3EE;
  --accent: #F59E0B;
  --accent-dim: rgba(245, 158, 11, 0.12);
  --bg: #0A0F14;
  --bg-card: #111827;
  --bg-surface: #1E293B;
  --bg-input: #0F172A;
  --border: rgba(6, 182, 212, 0.12);
  --border-hover: rgba(6, 182, 212, 0.3);
  --text: #E2E8F0;
  --text-dim: #94A3B8;
  --text-muted: #64748B;
  --green: #10B981;
  --red: #EF4444;
  --yellow: #FBBF24;
  --radius: 12px;
  --radius-sm: 8px;
  --font: 'Inter', -apple-system, BlinkMacSystemFont, system-ui, sans-serif;
  --mono: 'JetBrains Mono', 'Fira Code', monospace;
  --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { font-size: 16px; -webkit-font-smoothing: antialiased; }
body { font-family: var(--font); background: var(--bg); color: var(--text); min-height: 100vh; }

.app { max-width: 900px; margin: 0 auto; padding: 0 20px 60px; }

/* Header */
.header { padding: 32px 0 16px; text-align: center; }
.header-content { display: flex; flex-direction: column; align-items: center; gap: 4px; }
.logo { display: flex; align-items: center; gap: 10px; }
.logo-icon { font-size: 1.6rem; }
.logo-text {
  font-size: 1.4rem;
  font-weight: 700;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.tagline { font-size: 0.82rem; color: var(--text-muted); margin-top: 4px; }

/* Buttons */
.btn-primary, .btn-secondary {
  padding: 10px 20px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  font-family: var(--font);
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition);
}

.btn-primary { background: var(--primary); color: #000; border-color: var(--primary); }
.btn-primary:hover { box-shadow: 0 0 20px rgba(6, 182, 212, 0.3); transform: translateY(-1px); }
.btn-secondary { background: var(--bg-card); color: var(--text); }
.btn-secondary:hover { border-color: var(--border-hover); }

/* PEM Input */
.input-section { margin-bottom: 24px; }

.pem-textarea {
  width: 100%;
  background: var(--bg-input);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--secondary);
  font-family: var(--mono);
  font-size: 0.82rem;
  padding: 16px;
  outline: none;
  resize: vertical;
  transition: border-color var(--transition);
  line-height: 1.5;
}

.pem-textarea:focus { border-color: var(--primary); }
.pem-textarea::placeholder { color: var(--text-muted); }

.input-actions { display: flex; gap: 10px; margin-top: 12px; flex-wrap: wrap; }

/* Validity Banner */
.validity-banner {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 16px;
}

.validity-status {
  font-size: 1rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  gap: 8px;
}

.validity-status.valid { color: var(--green); }
.validity-status.expired { color: var(--red); }
.validity-status.expiring { color: var(--yellow); }

.expiry-countdown {
  font-family: var(--mono);
  font-size: 0.85rem;
  color: var(--text-dim);
}

/* Grid */
.grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
}

.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px;
  overflow: hidden;
}

.card.wide { grid-column: 1 / -1; }

.card-title {
  font-size: 0.82rem;
  font-weight: 700;
  color: var(--text-dim);
  margin-bottom: 12px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--border);
}

/* Fields */
.field-list { display: flex; flex-direction: column; gap: 6px; }

.field-row {
  display: flex;
  align-items: flex-start;
  gap: 8px;
  padding: 4px 0;
}

.field-label {
  flex-shrink: 0;
  width: 100px;
  font-size: 0.72rem;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  padding-top: 2px;
}

.field-value {
  font-size: 0.82rem;
  color: var(--text);
  word-break: break-all;
  font-family: var(--mono);
  line-height: 1.4;
}

.field-value.copyable {
  cursor: pointer;
  transition: color var(--transition);
}

.field-value.copyable:hover { color: var(--primary); }
.field-value.copyable::after { content: ' 📋'; font-size: 0.7rem; opacity: 0.5; }

/* SAN List */
.san-list { display: flex; flex-wrap: wrap; gap: 6px; }

.san-tag {
  padding: 4px 10px;
  background: var(--primary-dim);
  border: 1px solid var(--border);
  border-radius: 16px;
  font-size: 0.78rem;
  font-family: var(--mono);
  color: var(--secondary);
}

/* Validity Timeline */
.validity-timeline {
  height: 8px;
  background: var(--bg-surface);
  border-radius: 4px;
  position: relative;
  margin-bottom: 12px;
  overflow: hidden;
}

.validity-timeline-fill {
  height: 100%;
  border-radius: 4px;
  transition: width 0.5s ease;
}

.validity-timeline-fill.valid { background: linear-gradient(90deg, var(--green), var(--primary)); }
.validity-timeline-fill.expired { background: var(--red); width: 100% !important; }
.validity-timeline-fill.expiring { background: linear-gradient(90deg, var(--yellow), var(--accent)); }

.validity-timeline-now {
  position: absolute;
  top: -3px;
  width: 3px;
  height: 14px;
  background: white;
  border-radius: 2px;
}

/* Responsive */
@media (max-width: 640px) {
  .grid { grid-template-columns: 1fr; }
  .card.wide { grid-column: auto; }
  .field-row { flex-direction: column; gap: 2px; }
  .field-label { width: auto; }
  .validity-banner { flex-direction: column; align-items: flex-start; }
}