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

:root {
  --bg: #080810;
  --glass: rgba(255,255,255,0.04);
  --glass-border: rgba(255,255,255,0.08);
  --glass-hover: rgba(255,255,255,0.07);
  --accent: #7C3AED;
  --accent2: #9D5CF0;
  --pink: #EC4899;
  --text: #F0F0F8;
  --muted: rgba(240,240,248,0.45);
  --error: #EF4444;
  --radius: 20px;
  --radius-sm: 14px;
}

body {
  font-family: 'Inter', system-ui, sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  overflow-x: hidden;
}

/* ── Animated background ─────────────────────────────── */
.bg-blobs {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  overflow: hidden;
}

.blob {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  opacity: 0.35;
  animation: blobFloat 12s ease-in-out infinite;
}

.blob-1 {
  width: 500px; height: 500px;
  background: radial-gradient(circle, #7C3AED, transparent 70%);
  top: -100px; left: -100px;
  animation-delay: 0s;
}

.blob-2 {
  width: 400px; height: 400px;
  background: radial-gradient(circle, #EC4899, transparent 70%);
  top: 40%; right: -120px;
  animation-delay: -4s;
}

.blob-3 {
  width: 350px; height: 350px;
  background: radial-gradient(circle, #3B82F6, transparent 70%);
  bottom: -80px; left: 30%;
  animation-delay: -8s;
}

@keyframes blobFloat {
  0%, 100% { transform: translate(0, 0) scale(1); }
  33% { transform: translate(30px, -20px) scale(1.05); }
  66% { transform: translate(-20px, 30px) scale(0.97); }
}

/* ── App container ───────────────────────────────────── */
.app {
  position: relative;
  z-index: 1;
  max-width: 680px;
  margin: 0 auto;
  padding: 40px 20px 100px;
}

/* ── Header ──────────────────────────────────────────── */
.header {
  text-align: center;
  margin-bottom: 40px;
}

.logo {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 10px;
}

.logo-mark {
  font-size: 1.3rem;
  background: linear-gradient(135deg, var(--accent2), var(--pink));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  animation: spinSlow 8s linear infinite;
  display: inline-block;
}

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

.logo-name {
  font-family: 'Syne', sans-serif;
  font-size: 2.2rem;
  font-weight: 800;
  letter-spacing: -0.04em;
  color: var(--text);
}

.logo-accent {
  background: linear-gradient(135deg, var(--accent2), var(--pink));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.tagline {
  color: var(--muted);
  font-size: 0.95rem;
  font-weight: 500;
  letter-spacing: 0.01em;
}

/* ── Step blocks ─────────────────────────────────────── */
.step-block {
  margin-bottom: 28px;
}

.step-label {
  font-size: 0.72rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--muted);
  margin-bottom: 12px;
  display: flex;
  align-items: center;
  gap: 10px;
}

.step-num {
  font-family: 'Syne', sans-serif;
  font-size: 0.8rem;
  font-weight: 800;
  background: linear-gradient(135deg, var(--accent2), var(--pink));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* ── Upload zone ─────────────────────────────────────── */
.upload-zone {
  background: var(--glass);
  border: 1.5px dashed var(--glass-border);
  border-radius: var(--radius);
  padding: 40px 24px;
  text-align: center;
  cursor: pointer;
  transition: border-color 0.2s, background 0.2s;
  backdrop-filter: blur(12px);
  position: relative;
  overflow: hidden;
}

.upload-zone:hover {
  border-color: rgba(124,58,237,0.5);
  background: rgba(124,58,237,0.05);
}

.upload-zone.drag-over {
  border-color: var(--accent2);
  background: rgba(124,58,237,0.08);
}

.upload-icon-wrap {
  width: 52px; height: 52px;
  border-radius: 14px;
  background: var(--glass);
  border: 1px solid var(--glass-border);
  display: flex; align-items: center; justify-content: center;
  margin: 0 auto 16px;
  color: var(--accent2);
}

.upload-label {
  font-size: 0.95rem;
  font-weight: 500;
  margin-bottom: 6px;
}

.upload-cta {
  color: var(--accent2);
  font-weight: 600;
}

.upload-hint {
  font-size: 0.78rem;
  color: var(--muted);
}

.upload-preview {
  position: relative;
  display: inline-block;
}

.upload-preview img {
  max-height: 220px;
  max-width: 100%;
  border-radius: var(--radius-sm);
  display: block;
  margin: 0 auto;
}

.change-btn {
  position: absolute;
  top: 8px; right: 8px;
  background: rgba(0,0,0,0.7);
  color: #fff;
  border: none;
  border-radius: 8px;
  padding: 5px 12px;
  font-size: 0.78rem;
  font-weight: 600;
  cursor: pointer;
  font-family: inherit;
  backdrop-filter: blur(8px);
}

/* ── Style grid ──────────────────────────────────────── */
.style-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 10px;
}

.style-card {
  background: var(--glass);
  border: 1.5px solid var(--glass-border);
  border-radius: var(--radius-sm);
  overflow: hidden;
  cursor: pointer;
  font-family: inherit;
  transition: border-color 0.2s, transform 0.2s, box-shadow 0.2s;
  color: var(--text);
  padding: 0;
  display: flex;
  flex-direction: column;
  backdrop-filter: blur(8px);
}

.style-card:hover {
  border-color: rgba(157,92,240,0.6);
  transform: translateY(-3px);
  box-shadow: 0 12px 32px rgba(124,58,237,0.2);
}

.style-card.selected {
  border-color: var(--accent2);
  box-shadow: 0 0 0 1px var(--accent2), 0 12px 32px rgba(124,58,237,0.3);
}

.style-thumb {
  width: 100%;
  aspect-ratio: 1;
  object-fit: cover;
  display: block;
  transition: transform 0.3s ease;
}

.style-card:hover .style-thumb {
  transform: scale(1.06);
}

.style-name {
  font-size: 0.72rem;
  font-weight: 600;
  text-align: center;
  padding: 7px 4px;
  background: rgba(0,0,0,0.3);
  color: var(--text);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* ── Transform button ────────────────────────────────── */
.action-block {
  display: flex;
  justify-content: center;
}

.transform-btn {
  position: relative;
  border: none;
  border-radius: 99px;
  padding: 0;
  cursor: pointer;
  font-family: 'Syne', sans-serif;
  font-size: 1.1rem;
  font-weight: 800;
  letter-spacing: 0.02em;
  background: linear-gradient(135deg, var(--accent) 0%, var(--pink) 100%);
  color: #fff;
  width: 100%;
  max-width: 320px;
  transition: opacity 0.2s, transform 0.2s, box-shadow 0.2s;
  box-shadow: 0 8px 32px rgba(124,58,237,0.35);
}

.transform-btn:disabled {
  opacity: 0.35;
  cursor: not-allowed;
  box-shadow: none;
}

.transform-btn:not(:disabled):hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 40px rgba(124,58,237,0.5);
}

.btn-inner {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 18px 40px;
}

.btn-icon {
  font-size: 1rem;
  animation: spinSlow 4s linear infinite;
  display: inline-block;
}

/* ── Loading ─────────────────────────────────────────── */
.loading-overlay {
  position: fixed;
  inset: 0;
  background: rgba(8,8,16,0.85);
  backdrop-filter: blur(16px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 100;
}

.loading-overlay[hidden],
.result-section[hidden],
.toast[hidden] {
  display: none !important;
}

.loading-card {
  text-align: center;
  padding: 48px 40px;
  background: var(--glass);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius);
  width: 300px;
  max-width: 88vw;
  backdrop-filter: blur(20px);
}

.loading-ring {
  width: 56px; height: 56px;
  border-radius: 50%;
  border: 2px solid transparent;
  border-top-color: var(--accent2);
  border-right-color: var(--pink);
  animation: spin 0.8s linear infinite;
  margin: 0 auto 20px;
}

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

.loading-text {
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--muted);
  margin-bottom: 20px;
  min-height: 1.4em;
}

.loading-bar-track {
  width: 100%;
  height: 3px;
  background: var(--glass-border);
  border-radius: 99px;
  overflow: hidden;
}

.loading-bar {
  height: 100%;
  width: 0%;
  background: linear-gradient(90deg, var(--accent), var(--pink));
  border-radius: 99px;
  transition: width 2.5s cubic-bezier(0.4,0,0.2,1);
}

/* ── Result ──────────────────────────────────────────── */
.result-section {
  animation: fadeIn 0.4s ease;
}

.result-header {
  text-align: center;
  margin-bottom: 24px;
}

.result-logo .logo-name { font-size: 1.6rem; }
.result-logo .logo-mark { font-size: 1rem; }

.slider-wrap {
  margin-bottom: 20px;
}

.slider-container {
  position: relative;
  width: 100%;
  max-width: 560px;
  margin: 0 auto;
  border-radius: var(--radius);
  overflow: hidden;
  cursor: ew-resize;
  user-select: none;
  aspect-ratio: 1;
  box-shadow: 0 24px 80px rgba(0,0,0,0.6);
  border: 1px solid var(--glass-border);
}

.slider-img {
  position: absolute;
  inset: 0;
  width: 100%; height: 100%;
  object-fit: cover;
  display: block;
}

.after-img { z-index: 1; }

.slider-before-wrap {
  position: absolute;
  inset: 0;
  clip-path: inset(0 50% 0 0);
  z-index: 2;
  will-change: clip-path;
}

.slider-handle {
  position: absolute;
  top: 0; height: 100%;
  left: 50%;
  transform: translateX(-50%);
  width: 44px;
  z-index: 10;
  display: flex;
  flex-direction: column;
  align-items: center;
  cursor: ew-resize;
}

.handle-line {
  flex: 1;
  width: 2px;
  background: rgba(255,255,255,0.9);
}

.handle-pill {
  width: 38px; height: 38px;
  border-radius: 50%;
  background: #fff;
  color: #000;
  display: flex; align-items: center; justify-content: center;
  font-size: 0.9rem;
  font-weight: 700;
  box-shadow: 0 2px 16px rgba(0,0,0,0.4);
  flex-shrink: 0;
}

.img-label {
  position: absolute;
  bottom: 14px;
  background: rgba(0,0,0,0.55);
  backdrop-filter: blur(8px);
  color: rgba(255,255,255,0.9);
  font-size: 0.68rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  padding: 4px 10px;
  border-radius: 20px;
  pointer-events: none;
}

.label-before { left: 14px; z-index: 6; }
.label-after  { right: 14px; z-index: 4; }

/* ── Result actions ──────────────────────────────────── */
.result-actions {
  display: flex;
  gap: 10px;
  justify-content: center;
  flex-wrap: wrap;
}

.action-btn {
  padding: 13px 22px;
  border-radius: 99px;
  font-family: inherit;
  font-size: 0.88rem;
  font-weight: 600;
  cursor: pointer;
  border: none;
  transition: opacity 0.2s, transform 0.15s;
}

.action-btn:hover {
  opacity: 0.85;
  transform: translateY(-1px);
}

.btn-share {
  background: linear-gradient(135deg, var(--accent), var(--pink));
  color: #fff;
  box-shadow: 0 4px 20px rgba(124,58,237,0.3);
}

.btn-download {
  background: var(--glass);
  color: var(--text);
  border: 1.5px solid var(--glass-border);
  backdrop-filter: blur(8px);
}

.btn-retry {
  background: var(--glass);
  color: var(--text);
  border: 1.5px solid var(--glass-border);
  backdrop-filter: blur(8px);
}

/* ── Toast ───────────────────────────────────────────── */
.toast {
  position: fixed;
  bottom: 28px; left: 50%;
  transform: translateX(-50%);
  background: var(--error);
  color: #fff;
  padding: 12px 24px;
  border-radius: 99px;
  font-size: 0.88rem;
  font-weight: 500;
  z-index: 200;
  max-width: 90vw;
  text-align: center;
  animation: fadeInUp 0.3s ease;
  box-shadow: 0 4px 24px rgba(239,68,68,0.35);
}

/* ── Animations ──────────────────────────────────────── */
@keyframes fadeIn {
  from { opacity: 0; }
  to   { opacity: 1; }
}

@keyframes fadeInUp {
  from { opacity: 0; transform: translate(-50%, 12px); }
  to   { opacity: 1; transform: translate(-50%, 0); }
}

/* ── Mobile ──────────────────────────────────────────── */
@media (max-width: 600px) {
  .app { padding: 28px 16px 80px; }
  .logo-name { font-size: 1.8rem; }
  .tagline { font-size: 0.88rem; }
  .style-grid { grid-template-columns: repeat(3, 1fr); gap: 8px; }
  .style-name { font-size: 0.65rem; padding: 5px 2px; }
  .slider-container { max-width: 100%; }
  .result-actions { gap: 8px; }
  .action-btn { padding: 11px 16px; font-size: 0.82rem; }
}