/* ==========================================================================
   Mindscope AI — Mental Health Score Prediction
   Design tokens
   ========================================================================== */
:root {
  /* Palette */
  --bg-deep: #0B1026;
  --bg-deep-2: #100A2E;
  --blue: #5B8DFF;
  --purple: #9B6BFF;
  --cyan: #31E1E8;
  --ink: #EAF0FF;
  --ink-dim: #A8B3D9;
  --ink-dimmer: #7480A8;

  --glass-bg: rgba(255, 255, 255, 0.06);
  --glass-bg-strong: rgba(255, 255, 255, 0.09);
  --glass-border: rgba(255, 255, 255, 0.14);
  --glass-shadow: 0 20px 60px -20px rgba(10, 8, 40, 0.65);

  --radius-lg: 28px;
  --radius-md: 18px;
  --radius-sm: 12px;

  --font-display: 'Sora', 'Inter', system-ui, sans-serif;
  --font-body: 'Inter', system-ui, sans-serif;
  --font-mono: 'JetBrains Mono', monospace;

  --ease-out: cubic-bezier(.16,1,.3,1);
  --transition-fast: .18s var(--ease-out);
  --transition-med: .35s var(--ease-out);
}

/* Light theme overrides */
body.light-theme {
  --bg-deep: #EEF2FF;
  --bg-deep-2: #F7F5FF;
  --ink: #171B33;
  --ink-dim: #454C72;
  --ink-dimmer: #6C7396;
  --glass-bg: rgba(255, 255, 255, 0.55);
  --glass-bg-strong: rgba(255, 255, 255, 0.75);
  --glass-border: rgba(50, 40, 120, 0.12);
  --glass-shadow: 0 20px 60px -24px rgba(60, 50, 150, 0.28);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }

body {
  margin: 0;
  min-height: 100vh;
  font-family: var(--font-body);
  color: var(--ink);
  background: var(--bg-deep);
  overflow-x: hidden;
  transition: background var(--transition-med), color var(--transition-med);
}

/* Custom scrollbar */
::-webkit-scrollbar { width: 10px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb {
  background: linear-gradient(180deg, var(--blue), var(--purple));
  border-radius: 10px;
  border: 2px solid var(--bg-deep);
}

h1, h2, h3 { font-family: var(--font-display); margin: 0; }
p { margin: 0; }
a { color: inherit; text-decoration: none; }
button { font-family: var(--font-body); cursor: pointer; }
code { font-family: var(--font-mono); font-size: 0.85em; opacity: .85; }

/* ==========================================================================
   Animated aurora background
   ========================================================================== */
.bg-aurora {
  position: fixed;
  inset: 0;
  z-index: -1;
  overflow: hidden;
  background: radial-gradient(120% 120% at 50% 0%, var(--bg-deep-2) 0%, var(--bg-deep) 60%);
}
.aurora-blob {
  position: absolute;
  border-radius: 50%;
  filter: blur(90px);
  opacity: .55;
  animation: drift 22s ease-in-out infinite alternate;
  will-change: transform;
}
.blob-blue   { width: 46vw; height: 46vw; background: var(--blue);   top: -12%; left: -8%; animation-duration: 24s; }
.blob-purple { width: 42vw; height: 42vw; background: var(--purple); top: 18%;  right: -10%; animation-duration: 28s; animation-delay: -6s; }
.blob-cyan   { width: 38vw; height: 38vw; background: var(--cyan);   bottom: -14%; left: 18%; animation-duration: 26s; animation-delay: -12s; }

body.light-theme .aurora-blob { opacity: .32; }

@keyframes drift {
  0%   { transform: translate(0, 0) scale(1); }
  50%  { transform: translate(4%, 6%) scale(1.08); }
  100% { transform: translate(-5%, -3%) scale(0.96); }
}

@media (prefers-reduced-motion: reduce) {
  .aurora-blob, .fade-in-up, .pulse-dot, * { animation-duration: .001ms !important; animation-iteration-count: 1 !important; }
  html { scroll-behavior: auto; }
}

/* ==========================================================================
   Glass card base
   ========================================================================== */
.glass-card {
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  backdrop-filter: blur(22px) saturate(140%);
  -webkit-backdrop-filter: blur(22px) saturate(140%);
  box-shadow: var(--glass-shadow);
  transition: box-shadow var(--transition-med), border-color var(--transition-med), transform var(--transition-med);
}

/* ==========================================================================
   Navbar
   ========================================================================== */
.navbar {
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: blur(16px) saturate(140%);
  -webkit-backdrop-filter: blur(16px) saturate(140%);
  background: linear-gradient(to bottom, rgba(11,16,38,.65), rgba(11,16,38,0));
  border-bottom: 1px solid transparent;
}
body.light-theme .navbar {
  background: linear-gradient(to bottom, rgba(238,242,255,.75), rgba(238,242,255,0));
}
.navbar-inner {
  max-width: 1180px;
  margin: 0 auto;
  padding: 16px 32px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}
.brand { display: flex; align-items: center; gap: 10px; }
.brand-name { font-family: var(--font-display); font-weight: 700; font-size: 1.05rem; letter-spacing: -.01em; }
.brand-name-accent {
  background: linear-gradient(90deg, var(--blue), var(--purple), var(--cyan));
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.navbar-links { display: flex; gap: 28px; }
.navbar-links a {
  font-size: .92rem;
  color: var(--ink-dim);
  position: relative;
  padding: 4px 0;
  transition: color var(--transition-fast);
}
.navbar-links a::after {
  content: ''; position: absolute; left: 0; bottom: -2px; width: 0; height: 1.5px;
  background: linear-gradient(90deg, var(--blue), var(--cyan));
  transition: width var(--transition-fast);
}
.navbar-links a:hover { color: var(--ink); }
.navbar-links a:hover::after { width: 100%; }

.navbar-actions { display: flex; align-items: center; gap: 10px; }
.theme-toggle {
  width: 38px; height: 38px; border-radius: 50%;
  border: 1px solid var(--glass-border);
  background: var(--glass-bg);
  color: var(--ink);
  display: flex; align-items: center; justify-content: center;
  position: relative;
  transition: transform var(--transition-fast), background var(--transition-fast);
}
.theme-toggle:hover { transform: rotate(-14deg) scale(1.05); }
.theme-toggle .icon-moon { display: none; }
body.light-theme .theme-toggle .icon-sun { display: none; }
body.light-theme .theme-toggle .icon-moon { display: block; }

.navbar-burger {
  display: none;
  width: 38px; height: 38px;
  border: none; background: transparent;
  flex-direction: column; align-items: center; justify-content: center; gap: 4px;
}
.navbar-burger span { width: 20px; height: 2px; background: var(--ink); border-radius: 2px; transition: var(--transition-fast); }

/* ==========================================================================
   Hero
   ========================================================================== */
.hero { padding: 64px 32px 40px; }
.hero-inner {
  max-width: 1180px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1.1fr .9fr;
  align-items: center;
  gap: 40px;
  min-height: 60vh;
}
.eyebrow {
  display: inline-block;
  font-size: .82rem;
  font-weight: 600;
  color: var(--cyan);
  letter-spacing: .02em;
  margin-bottom: 18px;
  padding: 6px 14px;
  border-radius: 999px;
  background: rgba(49, 225, 232, .08);
  border: 1px solid rgba(49, 225, 232, .25);
}
.hero-title {
  font-size: clamp(2.4rem, 5vw, 3.7rem);
  font-weight: 800;
  line-height: 1.05;
  letter-spacing: -.02em;
  margin-bottom: 20px;
}
.grad-text {
  background: linear-gradient(90deg, var(--blue), var(--purple) 55%, var(--cyan));
  -webkit-background-clip: text; background-clip: text; color: transparent;
  background-size: 200% auto;
  animation: gradShift 6s ease-in-out infinite;
}
@keyframes gradShift {
  0%, 100% { background-position: 0% center; }
  50% { background-position: 100% center; }
}
.hero-subtitle {
  font-size: 1.12rem;
  color: var(--ink-dim);
  max-width: 46ch;
  line-height: 1.55;
  margin-bottom: 32px;
}
.hero-cta-row { display: flex; align-items: center; gap: 24px; flex-wrap: wrap; }
.hero-meta { font-size: .85rem; color: var(--ink-dimmer); display: flex; align-items: center; gap: 8px; }
.pulse-dot {
  width: 8px; height: 8px; border-radius: 50%; background: var(--cyan); display: inline-block;
  box-shadow: 0 0 0 0 rgba(49,225,232,.6);
  animation: pulse 2s infinite;
}
@keyframes pulse {
  0% { box-shadow: 0 0 0 0 rgba(49,225,232,.55); }
  70% { box-shadow: 0 0 0 8px rgba(49,225,232,0); }
  100% { box-shadow: 0 0 0 0 rgba(49,225,232,0); }
}

.hero-art { display: flex; align-items: center; justify-content: center; }
.hero-art svg { max-width: 420px; width: 100%; filter: drop-shadow(0 20px 40px rgba(91,141,255,.25)); }
#neuralDots circle { animation: nodeGlow 3s ease-in-out infinite; }
#neuralDots circle:nth-child(2n) { animation-delay: .6s; }
#neuralDots circle:nth-child(3n) { animation-delay: 1.2s; }
@keyframes nodeGlow {
  0%, 100% { opacity: .7; }
  50% { opacity: 1; }
}
.brain-path { animation: dashFlow 8s linear infinite; stroke-dasharray: 6 4; }
@keyframes dashFlow { to { stroke-dashoffset: -100; } }

/* Buttons */
.btn-primary {
  display: inline-flex; align-items: center; gap: 10px;
  padding: 15px 28px;
  border-radius: 999px;
  border: none;
  font-weight: 600;
  font-size: .98rem;
  color: #0B1026;
  background: linear-gradient(90deg, var(--cyan), var(--blue) 55%, var(--purple));
  background-size: 160% auto;
  transition: background-position var(--transition-med), transform var(--transition-fast), box-shadow var(--transition-fast);
  position: relative;
  overflow: hidden;
}
.btn-primary:hover { background-position: 100% center; transform: translateY(-2px); }
.btn-primary:active { transform: translateY(0); }
.btn-glow { box-shadow: 0 8px 30px -8px rgba(91,141,255,.55); }
.btn-large { padding: 17px 36px; font-size: 1.02rem; }

/* Ripple effect (applied to any element with .ripple-host via JS) */
.ripple-host { position: relative; overflow: hidden; }
.ripple {
  position: absolute;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.55);
  transform: scale(0);
  animation: rippleAnim .6s var(--ease-out);
  pointer-events: none;
}
body.light-theme .ripple { background: rgba(11, 16, 38, 0.18); }
@keyframes rippleAnim {
  to { transform: scale(1); opacity: 0; }
}

.btn-ghost {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 14px 22px;
  border-radius: 999px;
  border: 1px solid var(--glass-border);
  background: transparent;
  color: var(--ink-dim);
  font-weight: 600; font-size: .92rem;
  transition: var(--transition-fast);
  position: relative;
  overflow: hidden;
}
.btn-ghost:hover { color: var(--ink); border-color: var(--ink-dimmer); background: rgba(255,255,255,.04); }

.scroll-cue { display: flex; justify-content: center; margin-top: 24px; }
.scroll-cue span {
  width: 22px; height: 36px; border-radius: 14px; border: 1.5px solid var(--ink-dimmer);
  position: relative; display: block;
}
.scroll-cue span::after {
  content: ''; position: absolute; top: 6px; left: 50%; transform: translateX(-50%);
  width: 4px; height: 8px; border-radius: 3px; background: var(--cyan);
  animation: scrollDot 1.8s ease-in-out infinite;
}
@keyframes scrollDot {
  0% { top: 6px; opacity: 1; } 70% { top: 18px; opacity: 0; } 100% { top: 18px; opacity: 0; }
}

/* ==========================================================================
   Form section
   ========================================================================== */
.predict-section { padding: 20px 32px 60px; display: flex; justify-content: center; }
.form-card { width: 100%; max-width: 900px; padding: 44px 44px 36px; }
.card-header { margin-bottom: 30px; }
.card-header h2 { font-size: 1.6rem; font-weight: 700; margin-bottom: 6px; }
.card-header p { color: var(--ink-dim); font-size: .95rem; }

.form-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 22px 24px;
}
.span-2 { grid-column: 1 / -1; }

/* Floating label fields */
.field { position: relative; }
.floating-field input[type="text"],
.floating-field input[type="number"],
.floating-field select {
  width: 100%;
  padding: 20px 16px 8px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--glass-border);
  background: var(--glass-bg-strong);
  color: var(--ink);
  font-size: .98rem;
  font-family: var(--font-body);
  appearance: none;
  -webkit-appearance: none;
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}
.floating-field select {
  background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='14' height='9' viewBox='0 0 14 9'><path d='M1 1l6 6 6-6' fill='none' stroke='%23A8B3D9' stroke-width='1.6'/></svg>");
  background-repeat: no-repeat;
  background-position: right 16px center;
  padding-right: 36px;
}
.floating-field input:focus, .floating-field select:focus {
  outline: none;
  border-color: var(--cyan);
  box-shadow: 0 0 0 3px rgba(49,225,232,.18);
}
.floating-field label {
  position: absolute;
  left: 16px; top: 14px;
  font-size: .98rem;
  color: var(--ink-dimmer);
  pointer-events: none;
  transform-origin: left top;
  transition: transform var(--transition-fast), color var(--transition-fast), top var(--transition-fast);
}
.floating-field input:focus + label,
.floating-field input:not(:placeholder-shown) + label,
.floating-field select:focus + label,
.floating-field select:valid + label,
.floating-field.has-value label {
  top: 7px;
  transform: scale(.72);
  color: var(--cyan);
}
/* select "valid" trick: treat non-empty selection via JS class .has-value on parent */
.field-hint {
  display: block; margin-top: 6px; font-size: .76rem; color: var(--ink-dimmer);
}
.field-error {
  display: block; margin-top: 6px; font-size: .78rem; color: #FF8FA3;
  min-height: 14px;
}

/* Searchable country dropdown */
.searchable { position: relative; }
.dropdown-list {
  position: absolute;
  top: calc(100% + 6px);
  left: 0; right: 0;
  max-height: 220px;
  overflow-y: auto;
  list-style: none;
  margin: 0; padding: 6px;
  background: var(--bg-deep-2);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-sm);
  box-shadow: var(--glass-shadow);
  z-index: 20;
  display: none;
}
.dropdown-list.open { display: block; }
.dropdown-list li {
  padding: 10px 12px;
  border-radius: 8px;
  font-size: .92rem;
  color: var(--ink-dim);
  cursor: pointer;
  transition: background var(--transition-fast), color var(--transition-fast);
}
.dropdown-list li:hover, .dropdown-list li.active {
  background: rgba(91,141,255,.14);
  color: var(--ink);
}
.dropdown-list li.no-match { color: var(--ink-dimmer); cursor: default; }

/* Sliders */
.slider-field { padding-top: 4px; }
.slider-label-row { display: flex; align-items: center; justify-content: space-between; margin-bottom: 10px; }
.slider-label-row label { font-size: .92rem; color: var(--ink-dim); font-weight: 500; }
.slider-number {
  display: flex; align-items: center; gap: 4px;
  background: var(--glass-bg-strong);
  border: 1px solid var(--glass-border);
  border-radius: 10px;
  padding: 4px 10px;
}
.slider-number input {
  width: 56px; border: none; background: transparent; color: var(--ink);
  font-family: var(--font-mono); font-size: .88rem; text-align: right;
}
.slider-number input:focus { outline: none; }
.slider-readout { font-family: var(--font-mono); font-size: .88rem; min-width: 30px; text-align: right; }
.unit { font-size: .76rem; color: var(--ink-dimmer); }

.range-input {
  -webkit-appearance: none; appearance: none;
  width: 100%; height: 6px;
  border-radius: 999px;
  background: linear-gradient(90deg, var(--cyan), var(--blue) var(--fill, 50%), rgba(255,255,255,.12) var(--fill, 50%));
  outline: none;
  transition: background var(--transition-fast);
}
.range-input::-webkit-slider-thumb {
  -webkit-appearance: none; appearance: none;
  width: 20px; height: 20px; border-radius: 50%;
  background: var(--ink);
  border: 3px solid var(--blue);
  box-shadow: 0 2px 10px rgba(0,0,0,.35);
  cursor: pointer;
  transition: transform var(--transition-fast);
}
.range-input::-webkit-slider-thumb:hover { transform: scale(1.15); }
.range-input::-moz-range-thumb {
  width: 20px; height: 20px; border-radius: 50%;
  background: var(--ink); border: 3px solid var(--blue); cursor: pointer;
}
.range-input.accent-purple::-webkit-slider-thumb { border-color: var(--purple); }
.range-input.accent-cyan::-webkit-slider-thumb { border-color: var(--cyan); }
.slider-scale { display: flex; justify-content: space-between; margin-top: 6px; font-size: .74rem; color: var(--ink-dimmer); }

.form-actions {
  margin-top: 34px;
  display: flex;
  justify-content: flex-end;
  gap: 16px;
  flex-wrap: wrap;
}

/* Predict button loading state */
.btn-spinner {
  display: none;
  width: 16px; height: 16px;
  border-radius: 50%;
  border: 2.5px solid rgba(11,16,38,.25);
  border-top-color: #0B1026;
  animation: spin .7s linear infinite;
}
#predictBtn.loading .btn-label { opacity: 0; width: 0; overflow: hidden; }
#predictBtn.loading .btn-spinner { display: inline-block; }
#predictBtn:disabled { opacity: .75; cursor: not-allowed; transform: none !important; }
@keyframes spin { to { transform: rotate(360deg); } }

/* invalid state */
.field.invalid input, .field.invalid select { border-color: #FF8FA3 !important; box-shadow: 0 0 0 3px rgba(255,143,163,.15) !important; }

/* ==========================================================================
   Result card
   ========================================================================== */
.result-section { padding: 0 32px 80px; display: flex; justify-content: center; }
.result-card { width: 100%; max-width: 720px; padding: 40px 44px; }
.result-card[hidden] { display: none; }
.result-header { display: flex; align-items: center; gap: 18px; margin-bottom: 30px; }
.success-icon {
  flex-shrink: 0;
  width: 56px; height: 56px; border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  background: linear-gradient(135deg, var(--cyan), var(--blue));
  color: #0B1026;
  animation: popIn .5s var(--ease-out);
}
@keyframes popIn { from { transform: scale(0); opacity: 0; } to { transform: scale(1); opacity: 1; } }
.result-header h2 { font-size: 1.4rem; margin-bottom: 4px; }
.result-header p { color: var(--ink-dim); font-size: .92rem; }

.result-body { display: flex; align-items: center; gap: 36px; flex-wrap: wrap; }
.circular-progress-wrap { position: relative; width: 200px; height: 200px; flex-shrink: 0; }
.circular-progress { width: 100%; height: 100%; transform: rotate(-90deg); }
.ring-track { fill: none; stroke: rgba(255,255,255,.09); stroke-width: 12; }
.ring-fill {
  fill: none; stroke: url(#none); stroke-width: 12; stroke-linecap: round;
  stroke: var(--cyan);
  stroke-dasharray: 540.35; /* 2*pi*86 */
  stroke-dashoffset: 540.35;
  transition: stroke-dashoffset 1.4s var(--ease-out), stroke 1.4s var(--ease-out);
}
.circular-progress-label {
  position: absolute; inset: 0; display: flex; flex-direction: column;
  align-items: center; justify-content: center;
}
.score-number { font-family: var(--font-display); font-size: 2.6rem; font-weight: 800; }
.score-out-of { font-size: .85rem; color: var(--ink-dimmer); }

.result-details { flex: 1; min-width: 220px; }
.result-caption { font-size: 1.05rem; font-weight: 600; margin-bottom: 14px; }
.progress-bar-track { height: 10px; border-radius: 999px; background: rgba(255,255,255,.09); overflow: hidden; margin-bottom: 18px; }
.progress-bar-fill {
  height: 100%; width: 0%;
  border-radius: 999px;
  background: linear-gradient(90deg, var(--blue), var(--purple), var(--cyan));
  transition: width 1.4s var(--ease-out);
}
.result-disclaimer { font-size: .82rem; color: var(--ink-dimmer); line-height: 1.5; }

/* ==========================================================================
   Error toast
   ========================================================================== */
.error-toast {
  position: fixed;
  bottom: 26px; left: 50%;
  transform: translateX(-50%) translateY(120%);
  display: flex; align-items: center; gap: 12px;
  padding: 16px 20px;
  border-radius: 14px;
  background: rgba(30, 12, 20, .92);
  border: 1px solid rgba(255,143,163,.35);
  color: #FFD3DA;
  box-shadow: 0 20px 50px -15px rgba(0,0,0,.6);
  z-index: 1000;
  max-width: 92vw;
  transition: transform var(--transition-med), opacity var(--transition-med);
  opacity: 0;
}
.error-toast.show { transform: translateX(-50%) translateY(0); opacity: 1; }
.error-toast[hidden] { display: none; }
.error-toast button {
  background: none; border: none; color: inherit; font-size: 1.2rem; line-height: 1;
  padding: 0 0 0 6px; opacity: .7;
}
.error-toast button:hover { opacity: 1; }

/* ==========================================================================
   Footer
   ========================================================================== */
.site-footer { border-top: 1px solid var(--glass-border); padding: 34px 32px; }
.footer-inner {
  max-width: 1180px; margin: 0 auto;
  display: flex; justify-content: space-between; align-items: flex-end; gap: 24px; flex-wrap: wrap;
}
.footer-brand p { color: var(--ink-dim); font-size: .85rem; max-width: 44ch; margin-top: 8px; }
.footer-meta { text-align: right; font-size: .82rem; color: var(--ink-dimmer); }
.footer-meta p + p { margin-top: 4px; }

/* ==========================================================================
   Fade-in-up animation
   ========================================================================== */
.fade-in-up {
  opacity: 0;
  transform: translateY(24px);
  animation: fadeInUp .8s var(--ease-out) forwards;
}
@keyframes fadeInUp { to { opacity: 1; transform: translateY(0); } }

/* ==========================================================================
   Responsive
   ========================================================================== */
@media (max-width: 960px) {
  .hero-inner { grid-template-columns: 1fr; text-align: center; }
  .hero-copy { order: 2; }
  .hero-art { order: 1; max-width: 320px; margin: 0 auto; }
  .hero-cta-row { justify-content: center; }
  .form-card { padding: 34px 28px; }
}

@media (max-width: 760px) {
  .navbar-links { position: fixed; top: 64px; left: 0; right: 0; flex-direction: column; gap: 0;
    background: var(--bg-deep-2); border-bottom: 1px solid var(--glass-border);
    max-height: 0; overflow: hidden; transition: max-height var(--transition-med); }
  .navbar-links.open { max-height: 320px; }
  .navbar-links a { padding: 16px 32px; border-bottom: 1px solid rgba(255,255,255,.06); }
  .navbar-burger { display: flex; }

  .form-grid { grid-template-columns: 1fr; }
  .result-body { flex-direction: column; text-align: center; }
  .footer-inner { flex-direction: column; align-items: flex-start; }
  .footer-meta { text-align: left; }
}

@media (max-width: 480px) {
  .hero { padding: 40px 18px 24px; }
  .predict-section, .result-section { padding-left: 16px; padding-right: 16px; }
  .form-card, .result-card { padding: 26px 20px; }
  .navbar-inner { padding: 14px 18px; }
  .form-actions { flex-direction: column-reverse; }
  .form-actions button { width: 100%; justify-content: center; }
}