/* ============================================================
   Skin Lesion Classifier — Glassmorphism UI
   ============================================================ */

* { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --glass-bg: rgba(255, 255, 255, 0.08);
  --glass-bg-strong: rgba(255, 255, 255, 0.12);
  --glass-border: rgba(255, 255, 255, 0.18);
  --glass-border-strong: rgba(255, 255, 255, 0.28);
  --text-primary: rgba(255, 255, 255, 0.96);
  --text-secondary: rgba(255, 255, 255, 0.72);
  --text-tertiary: rgba(255, 255, 255, 0.50);
  --accent: #a855f7;
  --accent-2: #6366f1;
  --accent-3: #06b6d4;
  --warn: #fbbf24;
  --danger: #f87171;
}

html, body {
  min-height: 100vh;
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  color: var(--text-primary);
  background: #0a0e27;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

body {
  padding: 1.5rem 1rem 3rem;
  position: relative;
}

/* ─── Animated background ─────────────────────────────────── */
.bg-gradient {
  position: fixed;
  inset: 0;
  background:
    radial-gradient(circle at 20% 10%, #1e1b4b 0%, transparent 50%),
    radial-gradient(circle at 80% 80%, #0c4a6e 0%, transparent 50%),
    radial-gradient(circle at 50% 50%, #312e81 0%, transparent 60%),
    linear-gradient(135deg, #0a0e27 0%, #1a1a3e 100%);
  z-index: -3;
}

.bg-orb {
  position: fixed;
  border-radius: 50%;
  filter: blur(80px);
  opacity: 0.35;
  z-index: -2;
  pointer-events: none;
  animation: float 18s ease-in-out infinite;
}
.bg-orb-1 {
  width: 420px; height: 420px;
  background: #a855f7;
  top: -120px; left: -120px;
  animation-delay: 0s;
}
.bg-orb-2 {
  width: 380px; height: 380px;
  background: #06b6d4;
  bottom: -100px; right: -100px;
  animation-delay: -6s;
}
.bg-orb-3 {
  width: 320px; height: 320px;
  background: #ec4899;
  top: 45%; left: 60%;
  animation-delay: -12s;
  opacity: 0.25;
}

@keyframes float {
  0%, 100% { transform: translate(0, 0) scale(1); }
  33%      { transform: translate(40px, -60px) scale(1.1); }
  66%      { transform: translate(-30px, 40px) scale(0.95); }
}

/* ─── Container ───────────────────────────────────────────── */
.container {
  max-width: 580px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

/* ─── Glass card base ─────────────────────────────────────── */
.glass-card {
  background: var(--glass-bg);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  border: 1px solid var(--glass-border);
  border-radius: 20px;
  padding: 1.25rem;
  position: relative;
  overflow: hidden;
  animation: fadeSlideUp 0.6s cubic-bezier(0.22, 1, 0.36, 1) backwards;
}

/* Stagger entrance animations */
.glass-header   { animation-delay: 0.05s; }
.disclaimer     { animation-delay: 0.15s; }
.form-card      { animation-delay: 0.25s; }

@keyframes fadeSlideUp {
  from { opacity: 0; transform: translateY(20px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* Subtle top highlight on glass cards */
.glass-card::before {
  content: "";
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.35), transparent);
  pointer-events: none;
}

/* ─── Header ──────────────────────────────────────────────── */
.glass-header { padding: 1.5rem 1.25rem; }
.header-content {
  display: flex;
  align-items: center;
  gap: 1rem;
}
.logo-wrap {
  width: 52px; height: 52px;
  flex-shrink: 0;
  border-radius: 14px;
  background: linear-gradient(135deg, var(--accent), var(--accent-2), var(--accent-3));
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 8px 24px -8px rgba(168, 85, 247, 0.5);
}
.logo-icon {
  width: 28px; height: 28px;
  color: white;
}
.header-text h1 {
  font-size: 1.35rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  background: linear-gradient(135deg, #fff 30%, #c4b5fd 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}
.subtitle {
  font-size: 0.78rem;
  color: var(--text-tertiary);
  font-family: 'JetBrains Mono', monospace;
  margin-top: 0.2rem;
  letter-spacing: 0.02em;
}

/* ─── Disclaimer ──────────────────────────────────────────── */
.disclaimer {
  display: flex;
  gap: 0.9rem;
  align-items: flex-start;
  padding: 1rem 1.25rem;
  font-size: 0.88rem;
  line-height: 1.5;
  color: var(--text-secondary);
  border-color: rgba(251, 191, 36, 0.25);
  background: rgba(251, 191, 36, 0.08);
}
.disclaimer strong { color: var(--warn); font-weight: 600; }
.disclaimer-icon {
  font-size: 1.2rem;
  line-height: 1;
  color: var(--warn);
  flex-shrink: 0;
}

/* ─── Form ────────────────────────────────────────────────── */
.form-card { padding: 1.5rem; }

.field { margin-bottom: 1rem; }
.field:last-child { margin-bottom: 0; }

.field-label, .field label {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.82rem;
  font-weight: 500;
  color: var(--text-secondary);
  margin-bottom: 0.5rem;
  letter-spacing: 0.01em;
}
.label-icon {
  color: var(--accent);
  font-size: 1rem;
}
.required { color: var(--danger); margin-left: -0.3rem; }

/* ─── Upload zone ─────────────────────────────────────────── */
.upload-zone {
  display: block;
  cursor: pointer;
  background: rgba(255, 255, 255, 0.04);
  border: 2px dashed var(--glass-border);
  border-radius: 16px;
  padding: 2rem 1rem;
  text-align: center;
  transition: all 0.25s ease;
  position: relative;
  overflow: hidden;
}
.upload-zone:hover {
  background: rgba(255, 255, 255, 0.07);
  border-color: var(--accent);
  transform: translateY(-1px);
}
.upload-zone:has(#preview.visible) {
  padding: 0.5rem;
  border-style: solid;
  background: rgba(255, 255, 255, 0.05);
}

.upload-content {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.75rem;
}
.upload-zone:has(#preview.visible) .upload-content { display: none; }

.upload-icon {
  width: 40px;
  height: 40px;
  color: var(--accent);
  opacity: 0.85;
}
.upload-text { display: flex; flex-direction: column; gap: 0.2rem; }
.upload-primary {
  font-weight: 500;
  color: var(--text-primary);
  font-size: 0.95rem;
}
.upload-secondary {
  font-size: 0.8rem;
  color: var(--text-tertiary);
}

#preview {
  display: none;
  max-width: 100%;
  max-height: 280px;
  margin: 0 auto;
  border-radius: 12px;
  object-fit: contain;
}
#preview.visible { display: block; }

/* ─── Inputs / selects ────────────────────────────────────── */
input[type="number"], select {
  width: 100%;
  padding: 0.75rem 0.9rem;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid var(--glass-border);
  border-radius: 10px;
  color: var(--text-primary);
  font-family: inherit;
  font-size: 0.95rem;
  transition: all 0.2s ease;
  appearance: none;
}
input[type="number"]::placeholder { color: var(--text-tertiary); }

select {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath d='M1 1l5 5 5-5' stroke='%23ffffff' stroke-width='1.5' fill='none' stroke-linecap='round' stroke-linejoin='round' opacity='0.6'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 0.9rem center;
  padding-right: 2.2rem;
}
select option { background: #1a1a3e; color: var(--text-primary); }

input:focus, select:focus {
  outline: none;
  border-color: var(--accent);
  background: rgba(255, 255, 255, 0.09);
  box-shadow: 0 0 0 3px rgba(168, 85, 247, 0.18);
}

/* ─── Metadata details ────────────────────────────────────── */
.metadata-details {
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--glass-border);
  border-radius: 14px;
  margin-bottom: 1.25rem;
  overflow: hidden;
}
.metadata-details summary {
  cursor: pointer;
  padding: 0.9rem 1rem;
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-size: 0.88rem;
  font-weight: 500;
  color: var(--text-secondary);
  list-style: none;
  transition: background 0.2s ease;
}
.metadata-details summary::-webkit-details-marker { display: none; }
.metadata-details summary:hover { background: rgba(255, 255, 255, 0.04); }
.summary-icon { color: var(--accent); }
.summary-hint {
  margin-left: auto;
  margin-right: 0.4rem;
  font-size: 0.75rem;
  font-weight: 400;
  color: var(--text-tertiary);
  font-style: italic;
}
.chevron {
  width: 16px; height: 16px;
  color: var(--text-tertiary);
  transition: transform 0.3s ease;
}
.metadata-details[open] .chevron { transform: rotate(180deg); }

.metadata-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.75rem;
  padding: 0.25rem 1rem 1rem;
}
.metadata-grid .field { margin-bottom: 0; }
.field-wide { grid-column: 1 / -1; }

/* ─── Submit button ───────────────────────────────────────── */
.submit-btn {
  width: 100%;
  padding: 1rem;
  background: linear-gradient(135deg, var(--accent) 0%, var(--accent-2) 50%, var(--accent-3) 100%);
  background-size: 200% 200%;
  color: white;
  border: none;
  border-radius: 14px;
  font-size: 1rem;
  font-weight: 600;
  font-family: inherit;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.6rem;
  transition: all 0.3s ease;
  box-shadow: 0 8px 24px -8px rgba(168, 85, 247, 0.5);
  position: relative;
  overflow: hidden;
}
.submit-btn:hover:not(:disabled) {
  background-position: 100% 100%;
  transform: translateY(-2px);
  box-shadow: 0 12px 32px -8px rgba(168, 85, 247, 0.7);
}
.submit-btn:active:not(:disabled) { transform: translateY(0); }
.submit-btn:disabled { opacity: 0.55; cursor: not-allowed; }
.btn-icon { width: 18px; height: 18px; transition: transform 0.25s ease; }
.submit-btn:hover:not(:disabled) .btn-icon { transform: translateX(3px); }

/* ─── Loading ─────────────────────────────────────────────── */
.loading-card {
  text-align: center;
  padding: 2rem 1rem;
  animation: fadeIn 0.3s ease;
}
.pulse-ring {
  width: 60px;
  height: 60px;
  margin: 0 auto 1rem;
  position: relative;
}
.pulse-ring::before, .pulse-ring::after {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: 50%;
  border: 2px solid var(--accent);
  animation: pulse 1.6s ease-out infinite;
}
.pulse-ring::after { animation-delay: -0.8s; }
.pulse-core {
  position: absolute;
  inset: 20px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--accent), var(--accent-3));
  box-shadow: 0 0 20px rgba(168, 85, 247, 0.6);
}
@keyframes pulse {
  0%   { transform: scale(0.8); opacity: 1; }
  100% { transform: scale(1.8); opacity: 0; }
}
.loading-card p {
  color: var(--text-secondary);
  font-size: 0.95rem;
}
.dots span {
  animation: blink 1.4s infinite;
  opacity: 0;
}
.dots span:nth-child(2) { animation-delay: 0.2s; }
.dots span:nth-child(3) { animation-delay: 0.4s; }
@keyframes blink { 0%, 60%, 100% { opacity: 0; } 30% { opacity: 1; } }

/* ─── Results ─────────────────────────────────────────────── */
.results-wrap {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  animation: fadeSlideUp 0.6s cubic-bezier(0.22, 1, 0.36, 1);
}

/* Top result card with confidence ring */
.top-result-card {
  display: flex;
  align-items: center;
  gap: 1.25rem;
  padding: 1.5rem;
}
.ring-wrap {
  position: relative;
  width: 120px;
  height: 120px;
  flex-shrink: 0;
}
.confidence-ring {
  width: 100%;
  height: 100%;
  transform: rotate(-90deg);
}
.ring-bg {
  fill: none;
  stroke: rgba(255, 255, 255, 0.08);
  stroke-width: 8;
}
.ring-fg {
  fill: none;
  stroke: url(#ring-grad);
  stroke-width: 8;
  stroke-linecap: round;
  stroke-dasharray: 326.73;    /* 2 * π * 52 */
  stroke-dashoffset: 326.73;   /* start empty */
  transition: stroke-dashoffset 1.2s cubic-bezier(0.22, 1, 0.36, 1);
  filter: drop-shadow(0 0 6px rgba(168, 85, 247, 0.55));
}
.ring-center {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
}
.ring-value {
  font-size: 1.6rem;
  font-weight: 700;
  background: linear-gradient(135deg, var(--accent), var(--accent-3));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  letter-spacing: -0.02em;
}
.ring-label {
  font-size: 0.65rem;
  color: var(--text-tertiary);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-top: -0.15rem;
}

.top-result-info { flex: 1; min-width: 0; }
.top-result-label {
  font-size: 0.72rem;
  color: var(--text-tertiary);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: 0.25rem;
}
.top-result-class {
  font-size: 1.75rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  background: linear-gradient(135deg, #fff, #c4b5fd);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  line-height: 1.1;
  margin-bottom: 0.35rem;
  word-break: break-word;
}
.top-result-full {
  font-size: 0.85rem;
  color: var(--text-secondary);
  line-height: 1.4;
}

/* Probability bars */
.probs-card { padding: 1.25rem; }
.probs-card h3 {
  font-size: 0.78rem;
  color: var(--text-tertiary);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: 1rem;
  font-weight: 500;
}

.prob-row {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 0.7rem;
}
.prob-row:last-child { margin-bottom: 0; }

.prob-label {
  min-width: 58px;
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.03em;
}
.prob-row.top .prob-label { color: var(--accent); }

.prob-bar {
  flex: 1;
  height: 10px;
  background: rgba(255, 255, 255, 0.06);
  border-radius: 5px;
  overflow: hidden;
  position: relative;
}
.prob-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--accent-2), var(--accent-3));
  border-radius: 5px;
  width: 0;
  transition: width 1s cubic-bezier(0.22, 1, 0.36, 1);
  position: relative;
  overflow: hidden;
}
.prob-row.top .prob-fill {
  background: linear-gradient(90deg, var(--accent), var(--accent-2), var(--accent-3));
  box-shadow: 0 0 10px rgba(168, 85, 247, 0.45);
}
/* Shimmer on top bar */
.prob-row.top .prob-fill::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.3), transparent);
  animation: shimmer 2s ease-in-out infinite;
}
@keyframes shimmer {
  0%   { transform: translateX(-100%); }
  100% { transform: translateX(100%); }
}

.prob-val {
  min-width: 52px;
  text-align: right;
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.82rem;
  font-weight: 500;
  color: var(--text-secondary);
}
.prob-row.top .prob-val { color: var(--text-primary); font-weight: 600; }

.small-disclaimer {
  font-size: 0.75rem;
  color: var(--text-tertiary);
  font-style: italic;
  text-align: center;
  padding: 0 1rem;
  line-height: 1.5;
}

/* ─── Error ───────────────────────────────────────────────── */
.error-card {
  background: rgba(248, 113, 113, 0.1);
  border-color: rgba(248, 113, 113, 0.3);
  color: #fca5a5;
  padding: 1rem 1.25rem;
  font-size: 0.9rem;
  animation: shake 0.4s ease;
}
@keyframes shake {
  0%, 100%   { transform: translateX(0); }
  25%        { transform: translateX(-6px); }
  75%        { transform: translateX(6px); }
}

/* ─── Footer ──────────────────────────────────────────────── */
footer {
  text-align: center;
  margin-top: 0.5rem;
  font-size: 0.72rem;
  color: var(--text-tertiary);
  font-family: 'JetBrains Mono', monospace;
  letter-spacing: 0.02em;
}

/* ─── Utility ─────────────────────────────────────────────── */
.hidden { display: none !important; }
@keyframes fadeIn { from { opacity: 0; } to { opacity: 1; } }

/* ─── Mobile tweaks ───────────────────────────────────────── */
@media (max-width: 480px) {
  body { padding: 1rem 0.75rem 2rem; }
  .glass-card { border-radius: 18px; }
  .top-result-card { flex-direction: column; text-align: center; gap: 1rem; }
  .ring-wrap { width: 110px; height: 110px; }
  .header-content { flex-direction: column; text-align: center; gap: 0.75rem; }
  .top-result-class { font-size: 1.5rem; }
}

/* Fallback if backdrop-filter isn't supported */
@supports not ((backdrop-filter: blur(20px)) or (-webkit-backdrop-filter: blur(20px))) {
  .glass-card { background: rgba(30, 27, 75, 0.75); }
}