/* css/components.css
   ──────────────────────────────────────
   All reusable UI components.
   ──────────────────────────────────────*/

/* ── Glass Card ──────────────────────── */

.glass-card {
  background: var(--glass-bg);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-md);
  position: relative;
  overflow: hidden;
  transition:
    background var(--dur-slow) var(--ease-out),
    border-color var(--dur-slow) var(--ease-out);
}

/* Top shine line */
.glass-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 1px;
  background: linear-gradient(90deg,
    transparent 0%,
    var(--glass-shine) 30%,
    rgba(255,255,255,.32) 50%,
    var(--glass-shine) 70%,
    transparent 100%);
  pointer-events: none;
}

/* ── Action Buttons (topbar) ─────────── */

.action-btn {
  width: 36px; height: 36px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-2);
  background: transparent;
  border: 1px solid transparent;
  transition:
    color      var(--dur-fast) var(--ease-out),
    background var(--dur-fast) var(--ease-out),
    border-color var(--dur-fast) var(--ease-out),
    transform  var(--dur-fast) var(--ease-spring);
}

.action-btn:hover {
  color: var(--text-1);
  background: var(--glass-bg-2);
  border-color: var(--glass-border);
  transform: scale(1.08);
}

.action-btn:active { transform: scale(.94); }

/* Theme toggle icon swap */
.icon-moon { display: none; }
[data-theme="light"] .icon-sun  { display: none; }
[data-theme="light"] .icon-moon { display: block; }

/* ── Canvas ──────────────────────────── */

.canvas-container {
  position: relative;
  border-radius: var(--radius-lg);
}

.canvas-ring {
  position: absolute;
  inset: -3px;
  border-radius: calc(var(--radius-lg) + 3px);
  background: linear-gradient(135deg,
    rgba(0,240,255,.1),
    rgba(167,139,250,.07),
    rgba(0,240,255,.04));
  transition: all var(--dur-normal) var(--ease-spring);
  pointer-events: none;
}

.canvas-ring.is-drawing {
  background: linear-gradient(135deg,
    rgba(0,240,255,.5),
    rgba(167,139,250,.3),
    rgba(0,240,255,.2));
  box-shadow: 0 0 30px var(--accent-glow);
}

#drawCanvas {
  background: var(--canvas-bg);
  border-radius: var(--radius-lg);
  cursor: crosshair;
  touch-action: none;
  display: block;
  box-shadow: var(--shadow-lg), inset 0 0 60px rgba(0,0,0,.4);
  outline: none;
}

#drawCanvas:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 4px;
}

/* Canvas overlay hint */
.canvas-overlay {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--sp-2);
  pointer-events: none;
  border-radius: var(--radius-lg);
  transition: opacity var(--dur-normal) var(--ease-out);
}

.canvas-overlay.is-hidden { opacity: 0; }

.canvas-overlay__icon {
  font-size: 2rem;
  opacity: .3;
}

.canvas-overlay__text {
  font-family: var(--font-mono);
  font-size: .62rem;
  letter-spacing: .2em;
  text-transform: uppercase;
  color: var(--text-3);
}

/* ── Brush Control ───────────────────── */

.brush-row {
  width: 100%;
  max-width: 320px;
}

.brush-label {
  display: flex;
  align-items: center;
  gap: var(--sp-3);
  font-family: var(--font-mono);
  font-size: .55rem;
  letter-spacing: .2em;
  text-transform: uppercase;
  color: var(--text-3);
  cursor: pointer;
}

.brush-label input[type=range] {
  flex: 1;
  -webkit-appearance: none;
  height: 2px;
  background: var(--glass-border-2);
  border-radius: var(--radius-full);
  cursor: pointer;
  outline: none;
}

.brush-label input[type=range]::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 14px; height: 14px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 8px var(--accent-glow);
  transition: transform var(--dur-fast) var(--ease-spring);
}

.brush-label input[type=range]::-webkit-slider-thumb:hover {
  transform: scale(1.4);
}

/* ── CTA Row ─────────────────────────── */

.cta-row {
  display: flex;
  align-items: center;
  gap: var(--sp-3);
}

/* Predict button */
.btn-predict {
  display: flex;
  align-items: center;
  gap: var(--sp-2);
  padding: var(--sp-3) var(--sp-6);
  border-radius: var(--radius-md);
  font-family: var(--font-mono);
  font-size: .7rem;
  font-weight: 500;
  letter-spacing: .14em;
  text-transform: uppercase;
  background: linear-gradient(135deg, var(--accent) 0%, #009ab0 100%);
  color: #000;
  box-shadow: 0 4px 20px var(--accent-dim), 0 0 0 1px rgba(0,240,255,.2);
  transition:
    transform  var(--dur-fast) var(--ease-spring),
    box-shadow var(--dur-fast) var(--ease-spring),
    opacity    var(--dur-fast);
  position: relative;
  overflow: hidden;
}

.btn-predict::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(255,255,255,.2), transparent 55%);
  opacity: 0;
  transition: opacity var(--dur-fast);
}

.btn-predict:hover:not(:disabled)::before { opacity: 1; }

.btn-predict:hover:not(:disabled) {
  transform: translateY(-2px);
  box-shadow: 0 8px 32px var(--accent-glow), 0 0 0 1px rgba(0,240,255,.4);
}

.btn-predict:active:not(:disabled) {
  transform: translateY(0) scale(.97);
}

.btn-predict:disabled {
  opacity: .3;
  cursor: not-allowed;
  filter: grayscale(.5);
  box-shadow: none;
}

.btn-predict__icon { font-size: .85rem; }

/* Clear / secondary button */
.btn-secondary {
  padding: var(--sp-3) var(--sp-5);
  border-radius: var(--radius-md);
  font-family: var(--font-mono);
  font-size: .68rem;
  font-weight: 500;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--text-2);
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  backdrop-filter: var(--glass-blur);
  transition:
    color       var(--dur-fast),
    background  var(--dur-fast),
    border-color var(--dur-fast),
    transform   var(--dur-fast) var(--ease-spring);
}

.btn-secondary:hover {
  color: var(--text-1);
  border-color: var(--glass-border-2);
  transform: translateY(-1px);
}

.btn-secondary:active { transform: scale(.97); }

/* ── Result Card ─────────────────────── */

.result-card {
  padding: var(--sp-5) var(--sp-6);
  border-radius: var(--radius-md);
  background: var(--glass-bg);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border: 1px solid var(--glass-border);
  box-shadow: var(--shadow-md);
  position: relative;
  overflow: hidden;
}

/* Animated top accent bar */
.result-card__bar {
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
  transform: scaleX(0);
  transform-origin: left;
  transition: transform .9s var(--ease-spring);
  border-radius: 2px 2px 0 0;
}

.result-card.is-revealed .result-card__bar {
  transform: scaleX(1);
}

/* Scan line animation */
.result-card__scan {
  position: absolute;
  left: 0; right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--accent), transparent);
  top: 0;
  animation: scan 1.3s linear infinite;
  opacity: 0;
  transition: opacity var(--dur-fast);
  pointer-events: none;
}

.result-card__scan.is-active { opacity: 1; }

/* Main digit display */
.result-digit {
  font-family: var(--font-display);
  font-size: 5.5rem;
  line-height: 1;
  letter-spacing: .06em;
  color: var(--text-1);
  min-height: 88px;
  transition: color var(--dur-normal);
}

.result-conf {
  font-family: var(--font-mono);
  font-size: .62rem;
  color: var(--accent);
  letter-spacing: .06em;
  min-height: 20px;
  margin-top: var(--sp-2);
  transition: color var(--dur-normal);
}

/* ── Probability Bars ────────────────── */

.prob-bars {
  margin-top: var(--sp-5);
  display: flex;
  flex-direction: column;
  gap: 5px;
}

.prob-bars__title {
  font-family: var(--font-mono);
  font-size: .5rem;
  letter-spacing: .25em;
  text-transform: uppercase;
  color: var(--text-3);
  margin-bottom: var(--sp-2);
}

.prob-row {
  display: flex;
  align-items: center;
  gap: var(--sp-2);
}

.prob-row__digit {
  font-family: var(--font-display);
  font-size: 1.1rem;
  width: 16px;
  text-align: center;
  color: var(--text-2);
  flex-shrink: 0;
  transition: color var(--dur-normal);
}

.prob-row__digit.is-winner { color: var(--accent); }

.prob-row__track {
  flex: 1;
  height: 4px;
  background: rgba(255,255,255,.05);
  border-radius: var(--radius-full);
  overflow: hidden;
}

.prob-row__fill {
  height: 100%;
  border-radius: var(--radius-full);
  width: 0%;
  background: rgba(255,255,255,.15);
  transition: width .85s var(--ease-spring);
}

.prob-row__fill.is-winner {
  background: linear-gradient(90deg, var(--accent), #66f5ff);
  box-shadow: 0 0 6px var(--accent-glow);
}

.prob-row__pct {
  font-family: var(--font-mono);
  font-size: .56rem;
  color: var(--text-3);
  min-width: 34px;
  text-align: right;
  transition: color var(--dur-normal);
}

.prob-row__pct.is-winner { color: var(--accent); }

/* ── Train Panel ─────────────────────── */

.train-panel {
  padding: var(--sp-5) var(--sp-6);
}

.train-panel__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--sp-4);
}

.train-panel__title {
  font-size: .82rem;
  font-weight: 700;
  color: var(--text-1);
}

.train-panel__status {
  display: flex;
  align-items: center;
  gap: var(--sp-2);
  font-family: var(--font-mono);
  font-size: .56rem;
  color: var(--text-2);
  letter-spacing: .08em;
}

/* Status dot */
.status-dot {
  width: 7px; height: 7px;
  border-radius: 50%;
  background: var(--text-3);
  flex-shrink: 0;
  transition: background var(--dur-normal), box-shadow var(--dur-normal);
}

.status-dot.is-green  { background: var(--col-green);  box-shadow: 0 0 8px var(--col-green); }
.status-dot.is-amber  { background: var(--col-amber);  box-shadow: 0 0 8px var(--col-amber); animation: pulse-dot 1s infinite; }
.status-dot.is-cyan   { background: var(--accent);     box-shadow: 0 0 10px var(--accent);   animation: pulse-dot .7s infinite; }
.status-dot.is-rose   { background: var(--col-rose);   box-shadow: 0 0 8px var(--col-rose); }

/* Progress bar */
.train-panel__progress {
  display: flex;
  align-items: center;
  gap: var(--sp-3);
  margin-bottom: var(--sp-3);
}

.progress-track {
  flex: 1;
  height: 4px;
  background: rgba(255,255,255,.06);
  border-radius: var(--radius-full);
  overflow: hidden;
}

.progress-fill {
  height: 100%;
  width: 0%;
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
  border-radius: var(--radius-full);
  transition: width .4s var(--ease-out);
  box-shadow: 0 0 8px var(--accent-glow);
}

.progress-pct {
  font-family: var(--font-mono);
  font-size: .6rem;
  color: var(--accent);
  min-width: 32px;
  text-align: right;
}

.train-panel__stats {
  display: flex;
  gap: var(--sp-5);
  font-family: var(--font-mono);
  font-size: .56rem;
  color: var(--text-2);
  margin-bottom: var(--sp-4);
}

/* Train button */
.btn-train {
  font-family: var(--font-mono);
  font-size: .64rem;
  font-weight: 500;
  letter-spacing: .12em;
  text-transform: uppercase;
  padding: var(--sp-2) var(--sp-4);
  border-radius: var(--radius-sm);
  background: var(--accent-2-dim);
  color: #c4b5fd;
  border: 1px solid rgba(167,139,250,.25);
  transition:
    background  var(--dur-fast),
    transform   var(--dur-fast) var(--ease-spring);
}

.btn-train:hover:not(:disabled) {
  background: rgba(167,139,250,.28);
  transform: translateY(-1px);
}

.btn-train:active:not(:disabled) { transform: scale(.97); }
.btn-train:disabled { opacity: .35; cursor: not-allowed; }

/* ── Network Legend ──────────────────── */

.legend-item {
  display: flex;
  align-items: center;
  gap: var(--sp-2);
  font-family: var(--font-mono);
  font-size: .5rem;
  color: var(--text-3);
  letter-spacing: .08em;
}

.legend-dot {
  width: 6px; height: 6px;
  border-radius: 50%;
  flex-shrink: 0;
}

.legend-dot--active { background: var(--accent); box-shadow: 0 0 5px var(--accent); }
.legend-dot--pos    { background: var(--col-positive); }
.legend-dot--neg    { background: var(--col-negative); }

/* ── Hero Section ────────────────────── */

.hero-section { text-align: center; padding-bottom: var(--sp-4); }

.hero-title {
  font-family: var(--font-display);
  font-size: clamp(2.6rem, 8vw, 4rem);
  line-height: 1.05;
  letter-spacing: .04em;
  color: var(--text-1);
}

.hero-title--accent { color: var(--accent); }

.hero-sub {
  font-family: var(--font-mono);
  font-size: .6rem;
  color: var(--text-3);
  letter-spacing: .12em;
  margin-top: var(--sp-3);
}

/* ── Thinking state ──────────────────── */
.is-thinking {
  animation: blink .85s ease-in-out infinite;
  color: var(--accent);
}