/* ========================================================
   CardioScreen AI — Design System
   Supports: Dark mode (default) + Light mode via [data-theme="light"]
   Mobile-first responsive layout
   ======================================================== */

/* Google Fonts */
@import url('https://fonts.googleapis.com/css2?family=Outfit:wght@300;400;500;600;700&family=Inter:wght@400;500;600&display=swap');

/* ── Dark Mode Variables (default) ──────────────────────── */
:root {
  --bg-color: #0b0f19;
  --bg-secondary: #111827;
  --bg-card: rgba(20, 26, 40, 0.7);
  --bg-card-hover: rgba(30, 38, 56, 0.85);
  --bg-sidebar: rgba(11, 15, 25, 0.9);
  --bg-input: rgba(255, 255, 255, 0.05);

  --text-primary: #f8fafc;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;

  --accent-cyan: #06b6d4;
  --accent-cyan-glow: rgba(6, 182, 212, 0.35);
  --accent-cyan-soft: rgba(6, 182, 212, 0.12);
  --accent-blue: #3b82f6;
  --accent-blue-glow: rgba(59, 130, 246, 0.35);

  --danger: #ef4444;
  --danger-glow: rgba(239, 68, 68, 0.4);
  --danger-soft: rgba(239, 68, 68, 0.1);
  --success: #10b981;
  --success-soft: rgba(16, 185, 129, 0.1);
  --warning: #f59e0b;

  --border-color: rgba(255, 255, 255, 0.08);
  --border-strong: rgba(255, 255, 255, 0.15);
  --shadow-color: rgba(0, 0, 0, 0.4);

  --card-radius: 16px;
  --btn-radius: 10px;
  --transition-fast: 0.18s ease;
  --transition-smooth: 0.35s cubic-bezier(0.16, 1, 0.3, 1);

  --body-gradient-1: rgba(6, 182, 212, 0.08);
  --body-gradient-2: rgba(59, 130, 246, 0.08);

  --scrollbar-thumb: rgba(255, 255, 255, 0.15);
  --scrollbar-track: transparent;
}

/* ── Light Mode Variables ────────────────────────────────── */
[data-theme="light"] {
  --bg-color: #f0f4f8;
  --bg-secondary: #e8edf3;
  --bg-card: rgba(255, 255, 255, 0.85);
  --bg-card-hover: rgba(255, 255, 255, 0.98);
  --bg-sidebar: rgba(255, 255, 255, 0.95);
  --bg-input: rgba(0, 0, 0, 0.04);

  --text-primary: #0f172a;
  --text-secondary: #475569;
  --text-muted: #94a3b8;

  --accent-cyan: #0891b2;
  --accent-cyan-glow: rgba(8, 145, 178, 0.25);
  --accent-cyan-soft: rgba(8, 145, 178, 0.1);
  --accent-blue: #2563eb;
  --accent-blue-glow: rgba(37, 99, 235, 0.25);

  --danger: #dc2626;
  --danger-glow: rgba(220, 38, 38, 0.3);
  --danger-soft: rgba(220, 38, 38, 0.08);
  --success: #059669;
  --success-soft: rgba(5, 150, 105, 0.08);
  --warning: #d97706;

  --border-color: rgba(0, 0, 0, 0.08);
  --border-strong: rgba(0, 0, 0, 0.18);
  --shadow-color: rgba(0, 0, 0, 0.12);

  --body-gradient-1: rgba(8, 145, 178, 0.06);
  --body-gradient-2: rgba(37, 99, 235, 0.06);

  --scrollbar-thumb: rgba(0, 0, 0, 0.15);
  --scrollbar-track: transparent;
}

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

/* ── Base ────────────────────────────────────────────────── */
html {
  height: 100%;
  font-size: 16px;
}

body {
  font-family: 'Outfit', 'Inter', system-ui, -apple-system, sans-serif;
  background-color: var(--bg-color);
  color: var(--text-primary);
  line-height: 1.6;
  overflow-x: hidden;
  min-height: 100%;
  background-image:
    radial-gradient(ellipse at 10% 40%, var(--body-gradient-1), transparent 40%),
    radial-gradient(ellipse at 90% 20%, var(--body-gradient-2), transparent 40%);
  background-attachment: fixed;
  transition: background-color 0.3s ease, color 0.3s ease;
}

/* Scrollbars */
::-webkit-scrollbar {
  width: 6px;
  height: 6px;
}

::-webkit-scrollbar-track {
  background: var(--scrollbar-track);
}

::-webkit-scrollbar-thumb {
  background: var(--scrollbar-thumb);
  border-radius: 3px;
}

/* ── Typography ──────────────────────────────────────────── */
h1,
h2,
h3,
h4,
h5,
h6 {
  font-weight: 600;
  letter-spacing: -0.02em;
  color: var(--text-primary);
  line-height: 1.3;
}

.text-gradient {
  background: linear-gradient(135deg, var(--accent-cyan), var(--accent-blue));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.text-sm {
  font-size: 0.875rem;
  color: var(--text-secondary);
}

.text-lg {
  font-size: 1.125rem;
}

.text-xl {
  font-size: 1.25rem;
}

.text-2xl {
  font-size: 1.5rem;
}

.text-3xl {
  font-size: 1.875rem;
}

/* ── Glass Card ──────────────────────────────────────────── */
.glass-card {
  background: var(--bg-card);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--border-color);
  border-radius: var(--card-radius);
  padding: 20px;
  transition: all var(--transition-smooth);
  position: relative;
  overflow: hidden;
  box-shadow: 0 4px 24px var(--shadow-color);
}

.glass-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--border-strong), transparent);
  opacity: 0;
  transition: opacity var(--transition-smooth);
}

.glass-card:hover {
  background: var(--bg-card-hover);
  transform: translateY(-1px);
  box-shadow: 0 8px 32px var(--shadow-color);
}

.glass-card:hover::before {
  opacity: 1;
}

/* ── Buttons ─────────────────────────────────────────────── */
.btn-primary {
  background: linear-gradient(135deg, var(--accent-cyan), var(--accent-blue));
  color: white;
  border: none;
  padding: 11px 22px;
  border-radius: var(--btn-radius);
  font-weight: 600;
  font-size: 0.9rem;
  font-family: 'Outfit', sans-serif;
  cursor: pointer;
  transition: all var(--transition-fast);
  box-shadow: 0 4px 14px var(--accent-blue-glow);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 7px;
  white-space: nowrap;
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px var(--accent-cyan-glow);
  filter: brightness(1.08);
}

.btn-primary:active {
  transform: translateY(0);
}

.btn-secondary {
  background: var(--bg-input);
  color: var(--text-primary);
  border: 1px solid var(--border-color);
  padding: 11px 22px;
  border-radius: var(--btn-radius);
  font-weight: 500;
  font-size: 0.9rem;
  font-family: 'Outfit', sans-serif;
  cursor: pointer;
  transition: all var(--transition-fast);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 7px;
  white-space: nowrap;
}

.btn-secondary:hover {
  background: var(--bg-card-hover);
  border-color: var(--border-strong);
}

.btn-danger {
  background: linear-gradient(135deg, #ef4444, #b91c1c);
  color: white;
  border: none;
  padding: 11px 22px;
  border-radius: var(--btn-radius);
  font-weight: 600;
  font-size: 0.9rem;
  font-family: 'Outfit', sans-serif;
  cursor: pointer;
  transition: all var(--transition-fast);
  box-shadow: 0 4px 14px var(--danger-glow);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 7px;
  animation: pulse-danger 2s infinite;
}

.btn-danger:hover {
  transform: translateY(-2px);
  filter: brightness(1.15);
}

/* Icon button (theme toggle, etc.) */
.btn-icon {
  background: var(--bg-input);
  border: 1px solid var(--border-color);
  border-radius: 10px;
  width: 40px;
  height: 40px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all var(--transition-fast);
  color: var(--text-secondary);
  flex-shrink: 0;
}

.btn-icon:hover {
  background: var(--accent-cyan-soft);
  border-color: var(--accent-cyan);
  color: var(--accent-cyan);
  transform: scale(1.05);
}

/* ── Layout ──────────────────────────────────────────────── */
.app-container {
  display: flex;
  min-height: 100vh;
  width: 100%;
}

/* Sidebar */
.sidebar {
  width: 260px;
  background: var(--bg-sidebar);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-right: 1px solid var(--border-color);
  display: flex;
  flex-direction: column;
  padding: 20px 16px;
  position: relative;
  z-index: 50;
  flex-shrink: 0;
  transition: transform var(--transition-smooth), background-color 0.3s;
}

/* Main content */
.main-content {
  flex: 1;
  padding: 28px 32px;
  overflow-y: auto;
  overflow-x: hidden;
  position: relative;
  min-width: 0;
  /* prevent flex overflow */
}

/* ── Mobile Header (visible on small screens) ────────────── */
.mobile-header {
  display: none;
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--bg-sidebar);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border-color);
  padding: 12px 16px;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.mobile-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 1rem;
  color: var(--text-primary);
  text-decoration: none;
}

/* Mobile nav drawer overlay */
.mobile-nav-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.5);
  z-index: 40;
  backdrop-filter: blur(2px);
}

.mobile-nav-overlay.open {
  display: block;
}

/* Sidebar open on mobile */
.sidebar.mobile-open {
  transform: translateX(0) !important;
}

/* ── Navigation Items ────────────────────────────────────── */
.nav-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 14px;
  border-radius: 9px;
  color: var(--text-secondary);
  cursor: pointer;
  transition: all var(--transition-fast);
  margin-bottom: 4px;
  font-weight: 500;
  font-size: 0.9rem;
  border: 1px solid transparent;
}

.nav-item:hover {
  background: var(--bg-input);
  color: var(--text-primary);
  border-color: var(--border-color);
}

.nav-item.active {
  background: var(--accent-cyan-soft);
  color: var(--accent-cyan);
  border-color: rgba(6, 182, 212, 0.2);
  border-left: 3px solid var(--accent-cyan);
}

/* ── Upload Zone ─────────────────────────────────────────── */
.upload-zone {
  border: 2px dashed rgba(6, 182, 212, 0.3);
  border-radius: var(--card-radius);
  padding: 40px 20px;
  text-align: center;
  cursor: pointer;
  transition: all var(--transition-smooth);
  background: var(--accent-cyan-soft);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 14px;
  min-height: 200px;
}

.upload-zone:hover {
  border-color: var(--accent-cyan);
  background: rgba(6, 182, 212, 0.08);
  transform: scale(1.01);
  box-shadow: 0 0 30px var(--accent-cyan-glow);
}

/* ── Feature Metrics ─────────────────────────────────────── */
.feature-metric {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 10px 0;
  border-bottom: 1px solid var(--border-color);
}

.feature-metric:last-child {
  border-bottom: none;
}

.feature-name {
  color: var(--text-secondary);
  font-size: 0.88rem;
  display: flex;
  align-items: center;
  gap: 7px;
}

.feature-value {
  font-weight: 600;
  font-family: 'Inter', monospace;
  font-size: 1rem;
  color: var(--accent-cyan);
}

/* ── Result Cards ────────────────────────────────────────── */
.result-normal {
  background: linear-gradient(135deg, var(--success-soft), transparent) !important;
  border-color: rgba(16, 185, 129, 0.3) !important;
}

.result-disease {
  background: linear-gradient(135deg, var(--danger-soft), transparent) !important;
  border-color: rgba(239, 68, 68, 0.3) !important;
}

.confidence-bar-bg {
  height: 8px;
  background: var(--border-color);
  border-radius: 4px;
  overflow: hidden;
  margin-top: 10px;
}

.confidence-bar-fill {
  height: 100%;
  border-radius: 4px;
  transition: width 1s cubic-bezier(0.16, 1, 0.3, 1);
}

.result-normal .confidence-bar-fill {
  background: var(--success);
}

.result-disease .confidence-bar-fill {
  background: var(--danger);
}

/* ── Animations ──────────────────────────────────────────── */
@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(12px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes pulse-danger {
  0% {
    box-shadow: 0 0 0 0 rgba(239, 68, 68, 0.7);
  }

  70% {
    box-shadow: 0 0 0 12px rgba(239, 68, 68, 0);
  }

  100% {
    box-shadow: 0 0 0 0 rgba(239, 68, 68, 0);
  }
}

@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}

.animate-fade-in {
  animation: fadeIn 0.5s var(--transition-smooth) both;
}

.delay-100 {
  animation-delay: 0.08s;
}

.delay-200 {
  animation-delay: 0.16s;
}

.delay-300 {
  animation-delay: 0.24s;
}

/* ── Responsive Breakpoints ──────────────────────────────── */

/* Tablet */
@media (max-width: 1024px) {
  .main-content {
    padding: 24px 20px;
  }
}

/* Mobile */
@media (max-width: 768px) {

  /* Show mobile header, hide sidebar by default */
  .mobile-header {
    display: flex;
  }

  .app-container {
    flex-direction: column;
  }

  .sidebar {
    position: fixed;
    top: 0;
    left: 0;
    bottom: 0;
    width: 260px;
    transform: translateX(-100%);
    box-shadow: 4px 0 24px var(--shadow-color);
  }

  .main-content {
    padding: 16px;
    /* add top padding for sticky mobile header */
    padding-top: 16px;
  }

  /* Upload zones stack vertically */
  .upload-zones-row {
    flex-direction: column !important;
    gap: 14px !important;
  }

  .upload-zone {
    min-height: 160px;
    padding: 28px 16px;
  }

  /* Dashboard header wraps on small screens */
  .dashboard-header {
    flex-direction: column;
    align-items: flex-start;
    gap: 14px;
  }

  .dashboard-header-actions {
    width: 100%;
    flex-wrap: wrap;
    gap: 8px;
  }

  /* Patient info row stacks */
  .patient-row {
    flex-direction: column !important;
    gap: 10px !important;
  }

  /* Buttons become full-width on small screens */
  .btn-primary,
  .btn-secondary,
  .btn-danger {
    width: 100%;
    justify-content: center;
  }

  .action-buttons {
    flex-direction: column;
    width: 100%;
  }
}

/* Extra small phones */
@media (max-width: 480px) {
  html {
    font-size: 15px;
  }

  .main-content {
    padding: 12px;
  }

  .glass-card {
    padding: 16px;
  }
}

/* ── Light mode specific overrides ───────────────────────── */
[data-theme="light"] body {
  background-image:
    radial-gradient(ellipse at 10% 40%, var(--body-gradient-1), transparent 40%),
    radial-gradient(ellipse at 90% 20%, var(--body-gradient-2), transparent 40%);
}

[data-theme="light"] .glass-card {
  box-shadow: 0 2px 16px var(--shadow-color);
}

[data-theme="light"] .upload-zone {
  border-color: rgba(8, 145, 178, 0.3);
  background: rgba(8, 145, 178, 0.04);
}

[data-theme="light"] .upload-zone:hover {
  background: rgba(8, 145, 178, 0.08);
}

[data-theme="light"] .confidence-bar-bg {
  background: rgba(0, 0, 0, 0.08);
}

[data-theme="light"] audio {
  filter: invert(0.85) hue-rotate(180deg);
}