@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800;900&family=JetBrains+Mono:wght@400;500;700&display=swap');

:root {
  /* Slate-Modern Palette */
  --bg-base: #f8fafc; /* Slate 50 */
  --bg-surface: #ffffff;
  --bg-elevated: #ffffff;
  --bg-card: #ffffff;

  --border-subtle: #e2e8f0; /* Slate 200 */
  --border-default: #cbd5e1; /* Slate 300 */
  --border-accent: rgba(14, 165, 233, 0.2);

  --red-critical: #be123c; /* Rose 700 */
  --red-bg: #fff1f2; /* Rose 50 */
  --red-glow: rgba(190, 18, 60, 0.15);
  
  --amber-warning: #b45309; /* Amber 700 */
  --amber-bg: #fffbeb; /* Amber 50 */
  --amber-glow: rgba(180, 83, 9, 0.15);
  
  --green-safe: #047857; /* Emerald 700 */
  --green-bg: #ecfdf5; /* Emerald 50 */
  --green-glow: rgba(4, 120, 87, 0.15);
  
  --blue-accent: #0369a1; /* Sky 700 */
  --blue-bg: #f0f9ff; /* Sky 50 */
  --blue-glow: rgba(3, 105, 161, 0.15);
  
  --purple-ai: #6d28d9; /* Violet 700 */
  --purple-bg: #f5f3ff; /* Violet 50 */

  --text-primary: #0f172a; /* Slate 900 */
  --text-secondary: #475569; /* Slate 600 */
  --text-tertiary: #94a3b8; /* Slate 400 */

  --font-sans: 'Inter', system-ui, -apple-system, sans-serif;
  --font-mono: 'JetBrains Mono', monospace;
  
  --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
  --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
  --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
}

/* ── Global Styles ── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html, body, #root {
  height: 100%;
  background: var(--bg-base);
  color: var(--text-primary);
  font-family: var(--font-sans);
  font-size: 14px;
  -webkit-font-smoothing: antialiased;
  overflow: hidden; /* Main container manages scroll */
}

/* ── Scrollbar ── */
::-webkit-scrollbar { width: 5px; height: 5px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--border-default); border-radius: 10px; }
::-webkit-scrollbar-thumb:hover { background: var(--text-tertiary); }

/* ── Keyframes ── */
@keyframes fade-up {
  from { opacity: 0; transform: translateY(8px); }
  to   { opacity: 1; transform: translateY(0); }
}
@keyframes fade-in {
  from { opacity: 0; }
  to   { opacity: 1; }
}
@keyframes pulse-critical {
  0%, 100% { border-color: var(--red-critical); box-shadow: 0 0 0 0 var(--red-glow); }
  50% { border-color: #fb7185; box-shadow: 0 0 0 6px var(--red-glow); }
}
@keyframes directive-glow {
  0% { border-color: var(--blue-accent); box-shadow: 0 0 0 0 var(--blue-glow); }
  50% { border-color: #fff; box-shadow: 0 10px 25px -5px var(--blue-glow); }
  100% { border-color: var(--blue-accent); box-shadow: 0 0 0 0 var(--blue-glow); }
}
@keyframes spin {
  to { transform: rotate(360deg); }
}

/* ── Utility Classes ── */
.fade-up { animation: fade-up 0.4s cubic-bezier(0.16, 1, 0.3, 1) both; }
.fade-in { animation: fade-in 0.3s ease both; }

/* ── Components ── */
.card {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: 12px;
  box-shadow: var(--shadow-sm);
  transition: box-shadow 0.2s ease, border-color 0.2s ease;
}

.badge {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 4px 10px; border-radius: 6px;
  font-size: 10px; font-weight: 700; letter-spacing: 0.05em;
  text-transform: uppercase;
}
.badge-critical { background: var(--red-bg); color: var(--red-critical); border: 1px solid var(--red-glow); }
.badge-moderate { background: var(--amber-bg); color: var(--amber-warning); border: 1px solid var(--amber-glow); }
.badge-stable   { background: var(--green-bg); color: var(--green-safe); border: 1px solid var(--green-glow); }

.verdict-safe { background: var(--green-bg); color: var(--green-safe); border: 1px solid var(--green-glow); }
.verdict-caution { background: var(--amber-bg); color: var(--amber-warning); border: 1px solid var(--amber-glow); }
.verdict-contraindicated { background: var(--red-bg); color: var(--red-critical); border: 1px solid var(--red-glow); }

/* ── Pulse States ── */
.pulse-critical {
  animation: pulse-critical 2s infinite;
}

.directive-banner {
  background: linear-gradient(135deg, var(--blue-accent), #0c4a6e);
  color: #fff;
  border: 2px solid var(--blue-accent);
  animation: directive-glow 4s infinite;
}

/* ── Buttons ── */
.btn-primary {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 10px 20px; border-radius: 8px; border: 1px solid var(--blue-accent);
  cursor: pointer; font-family: var(--font-sans); font-weight: 600; font-size: 13px;
  background: var(--blue-accent); color: #fff;
  box-shadow: 0 1px 2px rgba(0,0,0,0.1);
  transition: all 0.2s ease;
}
.btn-primary:hover:not(:disabled) { background: #0c4a6e; transform: translateY(-1px); box-shadow: var(--shadow-md); }
.btn-primary:active { transform: translateY(0); }
.btn-primary:disabled { opacity: 0.4; cursor: not-allowed; }

.btn-danger {
  background: var(--red-critical);
  color: #fff;
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 14px 28px; border-radius: 10px; border: none; cursor: pointer;
  font-family: var(--font-sans); font-weight: 700; font-size: 14px;
  box-shadow: 0 4px 12px var(--red-glow);
  transition: all 0.2s ease;
}
.btn-danger:hover:not(:disabled) { background: #9f1239; transform: scale(1.02); box-shadow: 0 8px 24px var(--red-glow); }

.btn-ghost {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 8px 14px; border-radius: 8px; border: 1px solid var(--border-subtle);
  background: transparent; color: var(--text-secondary); cursor: pointer;
  font-family: var(--font-sans); font-size: 12px; font-weight: 500;
  transition: all 0.2s ease;
}
.btn-ghost:hover { border-color: var(--blue-accent); color: var(--blue-accent); background: var(--blue-bg); }

/* ── Forms ── */
.input-dark {
  background: var(--bg-surface); border: 1px solid var(--border-default);
  border-radius: 8px; color: var(--text-primary); padding: 10px 14px;
  font-family: var(--font-sans); font-size: 13px; width: 100%; outline: none;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}
.input-dark:focus { border-color: var(--blue-accent); box-shadow: 0 0 0 4px var(--blue-glow); }

/* ── Loading Spinner ── */
.spinner {
  width: 18px; height: 18px;
  border: 2px solid rgba(255,255,255,0.2);
  border-top-color: #fff;
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

/* ── Layout Grid ── */
.app-container {
  display: grid;
  grid-template-columns: 320px 1fr 400px;
  height: 100vh;
  background: var(--bg-base);
}

@media (max-width: 1200px) {
  .app-container {
    grid-template-columns: 280px 1fr 350px;
  }
}

/* ── Welcome Screen ── */
.welcome-screen {
  min-height: 100vh;
  width: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 40px 24px;
  background: radial-gradient(circle at 50% 0%, var(--blue-bg) 0%, transparent 60%),
              var(--bg-base);
  overflow-y: auto;
}

@keyframes heartbeat {
  0%, 100% { transform: scale(1); }
  14% { transform: scale(1.15); }
  28% { transform: scale(1); }
  42% { transform: scale(1.1); }
  70% { transform: scale(1); }
}

@keyframes ekg {
  0% { stroke-dashoffset: 400; }
  100% { stroke-dashoffset: 0; }
}

.welcome-screen h1, .welcome-screen p {
  text-align: center;
}