/* ============================================================
   SpeakFlow AI – style.css
   Modern AI Healthcare Platform
   ============================================================ */

/* ─── CSS CUSTOM PROPERTIES ─────────────────────────────── */
:root {
  --blue:        #2563EB;
  --blue-light:  #3B82F6;
  --blue-dark:   #1D4ED8;
  --teal:        #14B8A6;
  --teal-light:  #2DD4BF;
  --purple:      #7C3AED;
  --purple-light:#A78BFA;
  --green:       #10B981;
  --orange:      #F59E0B;
  --red:         #EF4444;
  --red-light:   #FCA5A5;

  --bg:          #F8FAFC;
  --bg-alt:      #EEF2FF;
  --surface:     #FFFFFF;
  --surface-2:   #F1F5F9;
  --border:      #E2E8F0;
  --text:        #1E293B;
  --text-muted:  #64748B;
  --text-light:  #94A3B8;

  --radius-sm:   8px;
  --radius:      16px;
  --radius-lg:   24px;
  --radius-xl:   32px;

  --shadow-sm:   0 1px 3px rgba(0,0,0,0.08);
  --shadow:      0 4px 16px rgba(0,0,0,0.10);
  --shadow-lg:   0 16px 48px rgba(0,0,0,0.12);
  --shadow-glow: 0 0 32px rgba(37,99,235,0.25);

  --font-display: 'Space Grotesk', sans-serif;
  --font-body:    'Inter', sans-serif;

  --transition:  0.25s ease;
}

[data-theme="dark"] {
  --bg:          #0F172A;
  --bg-alt:      #1E1B4B;
  --surface:     #1E293B;
  --surface-2:   #263148;
  --border:      #334155;
  --text:        #F1F5F9;
  --text-muted:  #94A3B8;
  --text-light:  #64748B;
  --shadow:      0 4px 16px rgba(0,0,0,0.40);
  --shadow-lg:   0 16px 48px rgba(0,0,0,0.50);
}

/* ─── RESET ─────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font-body);
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  transition: background var(--transition), color var(--transition);
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
button { cursor: pointer; font-family: var(--font-body); border: none; background: none; }
ul { list-style: none; }
canvas { display: block; }

/* ─── UTILITY ────────────────────────────────────────────── */
.container { max-width: 1180px; margin: 0 auto; padding: 0 24px; }
.gradient-text {
  background: linear-gradient(135deg, var(--blue), var(--teal));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.mt-16 { margin-top: 16px; }
.text-muted { color: var(--text-muted); }

/* ─── BUTTONS ────────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 24px;
  border-radius: 50px;
  font-size: 0.95rem;
  font-weight: 600;
  transition: all var(--transition);
  white-space: nowrap;
}
.btn-primary {
  background: linear-gradient(135deg, var(--blue), var(--blue-dark));
  color: #fff;
  box-shadow: 0 4px 20px rgba(37,99,235,0.30);
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 28px rgba(37,99,235,0.40);
}
.btn-outline {
  border: 2px solid var(--blue);
  color: var(--blue);
  background: transparent;
}
.btn-outline:hover {
  background: var(--blue);
  color: #fff;
  transform: translateY(-2px);
}
.btn-ghost {
  background: var(--surface-2);
  color: var(--text-muted);
  border-radius: 50px;
}
.btn-ghost:hover { background: var(--border); color: var(--text); }
.btn-danger {
  background: var(--red);
  color: #fff;
  border-radius: 50px;
}
.btn-danger:hover { background: #DC2626; }
.btn-sm { padding: 8px 18px; font-size: 0.875rem; }
.btn-lg { padding: 16px 36px; font-size: 1.05rem; }

/* ─── NAVBAR ─────────────────────────────────────────────── */
.navbar {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 1000;
  background: rgba(255,255,255,0.85);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
  transition: background var(--transition);
}
[data-theme="dark"] .navbar {
  background: rgba(15,23,42,0.90);
}
.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: 1180px;
  margin: 0 auto;
  padding: 16px 24px;
}
.nav-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-display);
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--text);
}
.nav-logo i { color: var(--blue); font-size: 1.5rem; }
.logo-ai { color: var(--blue); }
.nav-links {
  display: flex;
  gap: 4px;
}
.nav-links a {
  padding: 8px 14px;
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-muted);
  transition: all var(--transition);
}
.nav-links a:hover { color: var(--blue); background: var(--bg-alt); }
.nav-actions { display: flex; align-items: center; gap: 12px; }
.dark-mode-toggle {
  width: 40px; height: 40px;
  border-radius: 50%;
  background: var(--surface-2);
  border: 1px solid var(--border);
  color: var(--text-muted);
  font-size: 1rem;
  display: flex; align-items: center; justify-content: center;
  transition: all var(--transition);
}
.dark-mode-toggle:hover { color: var(--blue); border-color: var(--blue); }
.hamburger {
  display: none;
  width: 40px; height: 40px;
  align-items: center; justify-content: center;
  border-radius: var(--radius-sm);
  background: var(--surface-2);
  color: var(--text);
  font-size: 1.1rem;
}

/* ─── SECTIONS ───────────────────────────────────────────── */
.section { padding: 96px 0; }
.section-alt { background: var(--bg-alt); }
[data-theme="dark"] .section-alt { background: rgba(124,58,237,0.05); }

.section-header { text-align: center; margin-bottom: 56px; }
.section-eyebrow {
  display: inline-block;
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--blue);
  background: rgba(37,99,235,0.10);
  padding: 6px 16px;
  border-radius: 50px;
  margin-bottom: 16px;
}
.section-title {
  font-family: var(--font-display);
  font-size: clamp(1.8rem, 3vw, 2.6rem);
  font-weight: 700;
  color: var(--text);
  margin-bottom: 16px;
  line-height: 1.25;
}
.section-desc { font-size: 1.05rem; color: var(--text-muted); max-width: 520px; margin: 0 auto; }

/* ─── HERO ───────────────────────────────────────────────── */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding: 120px 0 80px;
  position: relative;
  overflow: hidden;
  background: linear-gradient(145deg, #0F172A 0%, #1E1B4B 50%, #0F172A 100%);
}
.particles {
  position: absolute;
  inset: 0;
  pointer-events: none;
  z-index: 0;
}
.particle {
  position: absolute;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(37,99,235,0.6), transparent);
  animation: floatParticle linear infinite;
}
@keyframes floatParticle {
  0%   { transform: translateY(0) scale(1); opacity: 0.6; }
  50%  { opacity: 0.2; }
  100% { transform: translateY(-120vh) scale(0.5); opacity: 0; }
}

.hero-container {
  max-width: 1180px;
  margin: 0 auto;
  padding: 0 24px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  align-items: center;
  gap: 64px;
  position: relative;
  z-index: 1;
}
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(37,99,235,0.20);
  border: 1px solid rgba(37,99,235,0.40);
  color: #93C5FD;
  padding: 6px 16px;
  border-radius: 50px;
  font-size: 0.85rem;
  font-weight: 600;
  margin-bottom: 24px;
}
.hero-title {
  font-family: var(--font-display);
  font-size: clamp(2.4rem, 5vw, 3.6rem);
  font-weight: 700;
  color: #fff;
  line-height: 1.15;
  margin-bottom: 24px;
}
.hero-subtitle {
  font-size: 1.1rem;
  color: #94A3B8;
  margin-bottom: 40px;
  max-width: 480px;
  line-height: 1.7;
}
.hero-buttons { display: flex; gap: 16px; flex-wrap: wrap; margin-bottom: 48px; }
.hero-stats {
  display: flex;
  gap: 32px;
  flex-wrap: wrap;
}
.hero-stat span {
  display: block;
  font-family: var(--font-display);
  font-size: 1.6rem;
  font-weight: 700;
  color: #fff;
}
.hero-stat label { font-size: 0.8rem; color: #64748B; }

/* AI Sphere */
.hero-visual { display: flex; flex-direction: column; align-items: center; gap: 32px; }
.ai-sphere {
  position: relative;
  width: 240px; height: 240px;
  display: flex; align-items: center; justify-content: center;
}
.sphere-ring {
  position: absolute;
  border-radius: 50%;
  border: 2px solid transparent;
}
.ring-1 {
  width: 240px; height: 240px;
  border-color: rgba(37,99,235,0.30);
  animation: spinRing 8s linear infinite;
}
.ring-2 {
  width: 180px; height: 180px;
  border-color: rgba(20,184,166,0.40);
  animation: spinRing 5s linear infinite reverse;
}
.ring-3 {
  width: 120px; height: 120px;
  border-color: rgba(124,58,237,0.50);
  animation: spinRing 3s linear infinite;
}
@keyframes spinRing {
  from { transform: rotateY(0deg) rotateX(20deg); }
  to   { transform: rotateY(360deg) rotateX(20deg); }
}
.sphere-core {
  width: 80px; height: 80px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--blue), var(--purple));
  display: flex; align-items: center; justify-content: center;
  font-size: 2rem; color: #fff;
  box-shadow: 0 0 40px rgba(37,99,235,0.50);
  animation: pulse 2s ease-in-out infinite;
}
@keyframes pulse {
  0%, 100% { transform: scale(1); box-shadow: 0 0 40px rgba(37,99,235,0.50); }
  50%       { transform: scale(1.05); box-shadow: 0 0 60px rgba(37,99,235,0.70); }
}
.waveform-container {
  width: 100%;
  background: rgba(255,255,255,0.05);
  border: 1px solid rgba(255,255,255,0.10);
  border-radius: var(--radius);
  padding: 12px;
  backdrop-filter: blur(10px);
}

/* ─── OVERVIEW GRID ──────────────────────────────────────── */
.overview-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 20px;
}
.overview-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px 20px;
  text-align: center;
  transition: all var(--transition);
  position: relative;
  overflow: hidden;
}
.overview-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--blue), var(--teal));
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--transition);
}
.overview-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); }
.overview-card:hover::before { transform: scaleX(1); }
.card-icon {
  width: 52px; height: 52px;
  border-radius: var(--radius-sm);
  display: flex; align-items: center; justify-content: center;
  font-size: 1.4rem;
  margin: 0 auto 16px;
}
.icon-blue   { background: rgba(37,99,235,0.12);  color: var(--blue);   }
.icon-teal   { background: rgba(20,184,166,0.12); color: var(--teal);   }
.icon-purple { background: rgba(124,58,237,0.12); color: var(--purple); }
.icon-green  { background: rgba(16,185,129,0.12); color: var(--green);  }
.icon-orange { background: rgba(245,158,11,0.12); color: var(--orange); }

.overview-card h3 { font-family: var(--font-display); font-size: 1rem; font-weight: 600; margin-bottom: 10px; }
.overview-card p  { font-size: 0.85rem; color: var(--text-muted); line-height: 1.6; margin-bottom: 14px; }
.card-tag {
  display: inline-block;
  padding: 3px 10px;
  border-radius: 50px;
  font-size: 0.75rem;
  font-weight: 600;
  background: rgba(37,99,235,0.10);
  color: var(--blue);
}

/* ─── ANALYSIS SECTION ───────────────────────────────────── */
.analysis-layout {
  display: grid;
  grid-template-columns: 1fr 380px;
  gap: 32px;
  align-items: start;
}
.upload-panel { display: flex; flex-direction: column; gap: 20px; }

.drop-zone {
  border: 2px dashed var(--border);
  border-radius: var(--radius-lg);
  background: var(--surface);
  padding: 56px 32px;
  text-align: center;
  cursor: pointer;
  transition: all var(--transition);
  position: relative;
}
.drop-zone.drag-over {
  border-color: var(--blue);
  background: rgba(37,99,235,0.05);
  transform: scale(1.01);
}
.drop-icon {
  font-size: 3rem;
  color: var(--blue);
  margin-bottom: 16px;
  animation: float 3s ease-in-out infinite;
}
@keyframes float {
  0%, 100% { transform: translateY(0); }
  50%       { transform: translateY(-8px); }
}
.drop-zone h3 { font-family: var(--font-display); font-size: 1.2rem; font-weight: 600; margin-bottom: 8px; }
.drop-zone p  { color: var(--text-muted); margin-bottom: 20px; font-size: 0.95rem; }

.file-preview {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 28px;
  display: flex;
  flex-direction: column;
  gap: 20px;
}
.file-info {
  display: flex;
  align-items: center;
  gap: 16px;
}
.file-icon {
  width: 52px; height: 52px;
  background: rgba(37,99,235,0.10);
  border-radius: var(--radius-sm);
  display: flex; align-items: center; justify-content: center;
  color: var(--blue);
  font-size: 1.4rem;
  flex-shrink: 0;
}
.file-name { font-weight: 600; font-size: 0.95rem; display: block; margin-bottom: 4px; }
.file-meta { font-size: 0.82rem; color: var(--text-muted); display: flex; gap: 8px; }
.file-remove {
  margin-left: auto;
  width: 34px; height: 34px;
  border-radius: 50%;
  background: rgba(239,68,68,0.10);
  color: var(--red);
  display: flex; align-items: center; justify-content: center;
  font-size: 1rem;
  transition: all var(--transition);
  flex-shrink: 0;
}
.file-remove:hover { background: var(--red); color: #fff; }
audio { width: 100%; border-radius: var(--radius-sm); }
.action-buttons { display: flex; gap: 12px; }

.upload-info {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 32px;
}
.upload-info h3 { font-family: var(--font-display); font-size: 1.1rem; margin-bottom: 20px; display: flex; align-items: center; gap: 10px; color: var(--blue); }
.info-list { display: flex; flex-direction: column; gap: 12px; margin-bottom: 24px; }
.info-list li { display: flex; align-items: center; gap: 10px; font-size: 0.9rem; }
.info-list li i { color: var(--green); }
.format-chips { display: flex; gap: 8px; }
.chip {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 6px 14px;
  border-radius: 50px;
  font-size: 0.82rem; font-weight: 600;
}
.chip-blue   { background: rgba(37,99,235,0.12);  color: var(--blue); }
.chip-teal   { background: rgba(20,184,166,0.12); color: var(--teal); }

/* ─── LOADING OVERLAY ────────────────────────────────────── */
.loading-overlay {
  position: fixed;
  inset: 0;
  z-index: 9999;
  background: rgba(15,23,42,0.90);
  backdrop-filter: blur(10px);
  display: flex; align-items: center; justify-content: center;
}
.loading-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  padding: 48px 40px;
  max-width: 440px;
  width: 90%;
  text-align: center;
  box-shadow: var(--shadow-lg);
}
.loading-sphere {
  width: 80px; height: 80px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--blue), var(--purple));
  display: flex; align-items: center; justify-content: center;
  font-size: 2rem; color: #fff;
  margin: 0 auto 24px;
  animation: pulse 1.5s ease-in-out infinite;
}
.loading-card h3 { font-family: var(--font-display); font-size: 1.4rem; margin-bottom: 8px; }
.loading-card p  { color: var(--text-muted); margin-bottom: 28px; }
.progress-bar-wrap {
  background: var(--surface-2);
  border-radius: 50px;
  height: 8px;
  overflow: hidden;
  margin-bottom: 10px;
}
.progress-bar {
  height: 100%;
  background: linear-gradient(90deg, var(--blue), var(--teal));
  border-radius: 50px;
  width: 0%;
  transition: width 0.3s ease;
}
.progress-pct { font-family: var(--font-display); font-weight: 700; color: var(--blue); margin-bottom: 28px; }
.loading-steps { text-align: left; display: flex; flex-direction: column; gap: 12px; }
.step { display: flex; align-items: center; gap: 12px; font-size: 0.9rem; color: var(--text-muted); }
.step.done { color: var(--green); }
.step.done i::before { content: '\f058'; font-family: 'Font Awesome 6 Free'; font-weight: 900; }
.step.active { color: var(--blue); }

/* ─── RECORDER ───────────────────────────────────────────── */
.recorder-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  padding: 40px;
  max-width: 680px;
  margin: 0 auto;
  text-align: center;
  box-shadow: var(--shadow);
}
.recorder-top { display: flex; align-items: center; justify-content: center; gap: 16px; margin-bottom: 24px; }
.timer-display {
  font-family: var(--font-display);
  font-size: 2.4rem;
  font-weight: 700;
  color: var(--text);
  letter-spacing: 0.05em;
}
.rec-indicator {
  width: 14px; height: 14px;
  border-radius: 50%;
  background: var(--text-light);
  transition: background var(--transition);
}
.rec-indicator.recording {
  background: var(--red);
  animation: blink 1s ease-in-out infinite;
}
@keyframes blink { 0%, 100% { opacity: 1; } 50% { opacity: 0.2; } }

#liveWaveform { width: 100%; border-radius: var(--radius); margin-bottom: 28px; }
.recorder-controls { display: flex; gap: 12px; justify-content: center; flex-wrap: wrap; }
.rec-btn {
  padding: 12px 20px;
  border-radius: 50px;
  font-size: 0.9rem;
  font-weight: 600;
  display: flex; align-items: center; gap: 8px;
  transition: all var(--transition);
  border: 2px solid transparent;
}
.btn-start { background: linear-gradient(135deg,var(--blue),var(--blue-dark)); color:#fff; }
.btn-start:hover:not(:disabled) { transform: translateY(-2px); box-shadow: 0 8px 24px rgba(37,99,235,0.35); }
.btn-stop  { background: rgba(239,68,68,0.12); color: var(--red); border-color: var(--red); }
.btn-stop:hover:not(:disabled)  { background: var(--red); color:#fff; }
.btn-play  { background: rgba(16,185,129,0.12); color: var(--green); border-color: var(--green); }
.btn-play:hover:not(:disabled)  { background: var(--green); color:#fff; }
.btn-delete{ background: rgba(245,158,11,0.12); color: var(--orange); border-color: var(--orange); }
.btn-delete:hover:not(:disabled){ background: var(--orange); color:#fff; }
.rec-btn:disabled { opacity: 0.35; cursor: not-allowed; }

/* ─── RESULTS ────────────────────────────────────────────── */
.results-placeholder {
  text-align: center;
  padding: 80px 20px;
  color: var(--text-muted);
}
.results-placeholder i { font-size: 4rem; margin-bottom: 16px; color: var(--border); }
.results-content { display: flex; flex-direction: column; gap: 32px; }
.results-grid { display: flex; flex-direction: column; gap: 24px; }

.prediction-card {
  border-radius: var(--radius-lg);
  padding: 36px;
  text-align: center;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 24px;
  flex-wrap: wrap;
}
.prediction-card.normal {
  background: linear-gradient(135deg, rgba(16,185,129,0.15), rgba(20,184,166,0.10));
  border: 2px solid rgba(16,185,129,0.40);
}
.prediction-card.stutter {
  background: linear-gradient(135deg, rgba(239,68,68,0.15), rgba(245,158,11,0.10));
  border: 2px solid rgba(239,68,68,0.40);
}
.pred-icon { font-size: 3rem; }
.pred-label { font-family: var(--font-display); font-size: 2rem; font-weight: 700; }
.pred-sublabel { font-size: 0.95rem; color: var(--text-muted); }

.score-cards { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }
.score-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px 20px;
  text-align: center;
  position: relative;
  overflow: hidden;
}
.score-value {
  font-family: var(--font-display);
  font-size: 2rem;
  font-weight: 700;
  color: var(--blue);
  margin-bottom: 6px;
}
.score-label { font-size: 0.82rem; color: var(--text-muted); font-weight: 500; }
.score-icon {
  position: absolute;
  top: 16px; right: 16px;
  font-size: 1rem;
  color: var(--border);
}

.charts-row { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }
.chart-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px 16px;
  text-align: center;
}
.chart-card h4 {
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--text-muted);
  margin-bottom: 12px;
  display: flex; align-items: center; justify-content: center; gap: 6px;
}
.chart-card canvas { width: 100% !important; }

.waveform-result-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
}
.waveform-result-card h4 { font-size: 0.9rem; font-weight: 600; margin-bottom: 12px; display: flex; align-items: center; gap: 8px; color: var(--text-muted); }
#resultWaveform { width: 100% !important; }

.report-section { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }

/* ─── HISTORY ────────────────────────────────────────────── */
.history-controls { display: flex; gap: 16px; align-items: center; margin-bottom: 24px; flex-wrap: wrap; }
.search-box {
  flex: 1;
  display: flex;
  align-items: center;
  gap: 10px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 50px;
  padding: 10px 20px;
  min-width: 220px;
}
.search-box i { color: var(--text-muted); }
.search-box input {
  border: none;
  outline: none;
  background: transparent;
  color: var(--text);
  font-size: 0.9rem;
  width: 100%;
  font-family: var(--font-body);
}
.history-table-wrap { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius-lg); overflow: hidden; }
.history-table { width: 100%; border-collapse: collapse; }
.history-table thead { background: var(--bg-alt); }
.history-table th {
  padding: 14px 20px;
  text-align: left;
  font-size: 0.82rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-muted);
}
.history-table td { padding: 14px 20px; font-size: 0.9rem; border-top: 1px solid var(--border); }
.history-table tbody tr:hover { background: var(--bg-alt); }
.badge {
  display: inline-block;
  padding: 3px 12px;
  border-radius: 50px;
  font-size: 0.78rem;
  font-weight: 700;
}
.badge-normal  { background: rgba(16,185,129,0.15); color: var(--green); }
.badge-stutter { background: rgba(239,68,68,0.15);  color: var(--red);   }
.history-empty {
  display: none;
  text-align: center;
  padding: 60px;
  color: var(--text-muted);
}
.history-empty i { font-size: 3rem; margin-bottom: 14px; color: var(--border); }
.delete-row-btn {
  background: rgba(239,68,68,0.10);
  color: var(--red);
  border: none;
  border-radius: var(--radius-sm);
  padding: 6px 10px;
  cursor: pointer;
  font-size: 0.8rem;
  transition: all var(--transition);
}
.delete-row-btn:hover { background: var(--red); color: #fff; }

/* ─── TIMELINE ───────────────────────────────────────────── */
.timeline { max-width: 720px; margin: 0 auto; display: flex; flex-direction: column; gap: 0; }
.timeline-item {
  display: grid;
  grid-template-columns: 56px 1fr;
  gap: 24px;
  position: relative;
}
.timeline-item:not(:last-child)::after {
  content: '';
  position: absolute;
  left: 27px;
  top: 56px;
  bottom: -24px;
  width: 2px;
  background: var(--border);
}
.timeline-dot {
  width: 56px; height: 56px;
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-size: 1.2rem;
  flex-shrink: 0;
  position: relative;
  z-index: 1;
}
.dot-blue   { background: rgba(37,99,235,0.15);  color: var(--blue);   border: 2px solid var(--blue);   }
.dot-teal   { background: rgba(20,184,166,0.15); color: var(--teal);   border: 2px solid var(--teal);   }
.dot-purple { background: rgba(124,58,237,0.15); color: var(--purple); border: 2px solid var(--purple); }
.dot-green  { background: rgba(16,185,129,0.15); color: var(--green);  border: 2px solid var(--green);  }
.dot-orange { background: rgba(245,158,11,0.15); color: var(--orange); border: 2px solid var(--orange); }

.timeline-content { padding: 8px 0 40px; }
.timeline-step {
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.10em;
  text-transform: uppercase;
  color: var(--blue);
  margin-bottom: 8px;
}
.timeline-content h3 { font-family: var(--font-display); font-size: 1.15rem; font-weight: 600; margin-bottom: 10px; }
.timeline-content p  { color: var(--text-muted); font-size: 0.95rem; line-height: 1.7; }

/* ─── STATS SECTION ──────────────────────────────────────── */
.stats-section {
  background: linear-gradient(135deg, #0F172A 0%, #1E1B4B 50%, #0F172A 100%);
}
.stats-section .section-eyebrow { background: rgba(37,99,235,0.25); color: #93C5FD; }
.stats-section .section-title { color: #fff; }
.stats-grid { display: grid; grid-template-columns: repeat(4,1fr); gap: 24px; }
.stat-card {
  background: rgba(255,255,255,0.05);
  border: 1px solid rgba(255,255,255,0.10);
  border-radius: var(--radius-lg);
  padding: 36px 24px;
  text-align: center;
  backdrop-filter: blur(10px);
  transition: all var(--transition);
}
.stat-card:hover { transform: translateY(-6px); background: rgba(37,99,235,0.15); }
.stat-icon { font-size: 2rem; color: var(--teal); margin-bottom: 16px; }
.stat-number {
  font-family: var(--font-display);
  font-size: 2.8rem;
  font-weight: 700;
  color: #fff;
  margin-bottom: 8px;
}
.stat-label { color: #94A3B8; font-size: 0.9rem; }

/* ─── FOOTER ─────────────────────────────────────────────── */
.footer { background: #020617; color: #94A3B8; padding: 64px 0 32px; }
.footer-top { display: grid; grid-template-columns: 1fr 1fr; gap: 48px; margin-bottom: 48px; }
.footer-brand .nav-logo { color: #fff; margin-bottom: 16px; }
.footer-brand p { font-size: 0.9rem; line-height: 1.7; max-width: 320px; }
.footer-info { display: flex; gap: 48px; }
.footer-block h4 { color: #fff; font-weight: 600; margin-bottom: 10px; }
.footer-block p { font-size: 0.9rem; line-height: 1.8; }
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.08);
  padding-top: 28px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
}
.footer-copy { font-size: 0.85rem; }
.footer-socials { display: flex; gap: 12px; }
.social-link {
  width: 40px; height: 40px;
  border-radius: 50%;
  border: 1px solid rgba(255,255,255,0.15);
  display: flex; align-items: center; justify-content: center;
  color: #94A3B8;
  transition: all var(--transition);
}
.social-link:hover { border-color: var(--blue); color: var(--blue); background: rgba(37,99,235,0.10); }

/* ─── SCROLL TO TOP ──────────────────────────────────────── */
.scroll-top {
  position: fixed;
  bottom: 32px; right: 32px;
  width: 48px; height: 48px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--blue), var(--blue-dark));
  color: #fff;
  font-size: 1rem;
  display: flex; align-items: center; justify-content: center;
  box-shadow: 0 4px 16px rgba(37,99,235,0.40);
  opacity: 0;
  transform: translateY(16px);
  transition: all var(--transition);
  z-index: 999;
}
.scroll-top.visible { opacity: 1; transform: translateY(0); }
.scroll-top:hover { transform: translateY(-4px); }

/* ─── RESPONSIVE ─────────────────────────────────────────── */
@media (max-width: 1024px) {
  .overview-grid    { grid-template-columns: repeat(3, 1fr); }
  .score-cards      { grid-template-columns: repeat(2, 1fr); }
  .charts-row       { grid-template-columns: repeat(2, 1fr); }
  .analysis-layout  { grid-template-columns: 1fr; }
  .stats-grid       { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 768px) {
  .nav-links        { display: none; flex-direction: column; position: fixed; top: 73px; left: 0; right: 0; background: var(--surface); padding: 20px; border-bottom: 1px solid var(--border); z-index: 999; }
  .nav-links.open   { display: flex; }
  .hamburger        { display: flex; }
  .hero-container   { grid-template-columns: 1fr; text-align: center; gap: 40px; }
  .hero-visual      { display: none; }
  .hero-buttons     { justify-content: center; }
  .hero-stats       { justify-content: center; }
  .overview-grid    { grid-template-columns: repeat(2, 1fr); }
  .score-cards      { grid-template-columns: 1fr 1fr; }
  .charts-row       { grid-template-columns: 1fr 1fr; }
  .footer-top       { grid-template-columns: 1fr; }
  .footer-info      { flex-direction: column; gap: 24px; }
  .stats-grid       { grid-template-columns: 1fr 1fr; }
  .recorder-controls{ gap: 8px; }
  .rec-btn          { padding: 10px 14px; font-size: 0.82rem; }
  .section          { padding: 64px 0; }
}
@media (max-width: 480px) {
  .overview-grid { grid-template-columns: 1fr; }
  .score-cards   { grid-template-columns: 1fr; }
  .charts-row    { grid-template-columns: 1fr; }
  .stats-grid    { grid-template-columns: 1fr; }
  .prediction-card { flex-direction: column; gap: 12px; }
  .pred-label    { font-size: 1.5rem; }
  .hero-title    { font-size: 2rem; }
}