@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700;800&display=swap');

/* ─── Reset & base ──────────────────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --clr-primary:      #5b21b6;
  --clr-primary-dark: #4c1d95;
  --clr-accent:       #8b5cf6;
  --clr-accent-light: #ede9fe;
  --clr-dark:         #0f0a1e;
  --clr-mid:          #4b5563;
  --clr-muted:        #9ca3af;
  --clr-light:        #f8f7ff;
  --clr-border:       #e5e7eb;
  --clr-white:        #ffffff;
  --clr-success:      #059669;
  --clr-success-dark: #047857;
  --clr-error:        #dc2626;

  --radius:        16px;
  --radius-sm:     10px;
  --radius-xs:     6px;
  --shadow-sm:     0 1px 3px rgba(0,0,0,.06), 0 1px 2px rgba(0,0,0,.04);
  --shadow:        0 4px 16px rgba(91,33,182,.08), 0 1px 4px rgba(0,0,0,.06);
  --shadow-lg:     0 12px 40px rgba(91,33,182,.14), 0 4px 12px rgba(0,0,0,.08);
  --shadow-xl:     0 24px 64px rgba(91,33,182,.18), 0 8px 24px rgba(0,0,0,.10);
  --transition:    .2s cubic-bezier(.4,0,.2,1);
  --transition-lg: .35s cubic-bezier(.4,0,.2,1);

  --font: 'Inter', 'Segoe UI', system-ui, -apple-system, sans-serif;
}

html { font-size: 16px; scroll-behavior: smooth; }

body {
  font-family: var(--font);
  background: var(--clr-light);
  color: var(--clr-dark);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--clr-primary); text-decoration: none; }
a:hover { color: var(--clr-primary-dark); text-decoration: underline; }

img { max-width: 100%; display: block; }

/* ─── Header ────────────────────────────────────────────────────────────────── */
.site-header {
  background: linear-gradient(135deg, #1a0a3c 0%, #0f0a1e 100%);
  color: var(--clr-white);
  padding: 1rem 1.5rem;
  display: flex;
  align-items: center;
  gap: 1rem;
  box-shadow: 0 2px 16px rgba(0,0,0,.3);
  position: sticky;
  top: 0;
  z-index: 100;
}

.site-header .logo {
  display: flex;
  align-items: center;
  gap: .75rem;
}

.logo-name {
  font-size: 1.5rem;
  font-weight: 800;
  line-height: 1;
  letter-spacing: -1.5px;
  color: #fff;
}

.logo-tld {
  color: var(--clr-accent);
  font-weight: 300;
  letter-spacing: 0;
}

/* ─── Language switcher ──────────────────────────────────────────────────────── */
.lang-switcher {
  margin-left: auto;
  display: flex;
  gap: .25rem;
  flex-shrink: 0;
}

.lang-btn {
  background: transparent;
  border: 1.5px solid rgba(255,255,255,.2);
  color: rgba(255,255,255,.5);
  border-radius: var(--radius-xs);
  padding: .3rem .65rem;
  font-size: .72rem;
  font-weight: 700;
  letter-spacing: .8px;
  cursor: pointer;
  font-family: inherit;
  transition: var(--transition);
  line-height: 1;
}

.lang-btn:hover {
  border-color: rgba(255,255,255,.5);
  color: #fff;
  background: rgba(255,255,255,.08);
}

.lang-btn.active {
  background: var(--clr-accent);
  border-color: var(--clr-accent);
  color: #fff;
}

/* ─── Progress stepper ──────────────────────────────────────────────────────── */
.stepper {
  display: flex;
  justify-content: center;
  padding: 1.75rem 1rem .75rem;
  gap: 0;
  position: relative;
  background: var(--clr-white);
  border-bottom: 1px solid var(--clr-border);
}

.stepper::before {
  content: '';
  position: absolute;
  top: calc(1.75rem + 18px);
  left: calc(50% - 148px);
  width: 296px;
  height: 2px;
  background: var(--clr-border);
  z-index: 0;
  border-radius: 1px;
}

.step {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: .4rem;
  width: 80px;
  position: relative;
  z-index: 1;
}

.step-num {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: var(--clr-white);
  border: 2px solid var(--clr-border);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: .78rem;
  font-weight: 700;
  color: var(--clr-muted);
  transition: var(--transition-lg);
}

.step-label {
  font-size: .68rem;
  color: var(--clr-muted);
  text-align: center;
  font-weight: 500;
  transition: var(--transition);
  letter-spacing: .2px;
}

.step.active .step-num {
  background: var(--clr-primary);
  border-color: var(--clr-primary);
  color: #fff;
  box-shadow: 0 0 0 4px var(--clr-accent-light);
}

.step.active .step-label {
  color: var(--clr-primary);
  font-weight: 700;
}

.step.done .step-num {
  background: var(--clr-success);
  border-color: var(--clr-success);
  color: #fff;
}

.step.done .step-num::after {
  content: '✓';
  font-size: .85rem;
}

.step.done .step-num span { display: none; }
.step.done .step-label { color: var(--clr-success); }

/* ─── Main layout ───────────────────────────────────────────────────────────── */
main {
  flex: 1;
  padding: 2rem 1rem 4rem;
  max-width: 640px;
  margin: 0 auto;
  width: 100%;
}

/* ─── Card ──────────────────────────────────────────────────────────────────── */
.card {
  background: var(--clr-white);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 2rem 1.75rem;
  margin-bottom: 1rem;
  border: 1px solid rgba(91,33,182,.06);
}

.card-title {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 1.25rem;
  display: flex;
  align-items: center;
  gap: .6rem;
  color: var(--clr-dark);
}

.card-title .step-badge {
  width: 26px;
  height: 26px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--clr-primary), var(--clr-accent));
  color: #fff;
  font-size: .72rem;
  font-weight: 700;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  box-shadow: 0 2px 6px rgba(91,33,182,.35);
}

/* ─── Upload drop zone ──────────────────────────────────────────────────────── */
.dropzone {
  border: 2px dashed var(--clr-border);
  border-radius: var(--radius);
  padding: 3rem 1.5rem;
  text-align: center;
  cursor: pointer;
  transition: var(--transition-lg);
  position: relative;
  background: linear-gradient(180deg, #faf8ff 0%, #f8f7ff 100%);
}

.dropzone:hover, .dropzone.drag-over {
  border-color: var(--clr-accent);
  background: linear-gradient(180deg, var(--clr-accent-light) 0%, #f5f0ff 100%);
  transform: translateY(-1px);
  box-shadow: 0 4px 20px rgba(91,33,182,.1);
}

.dropzone input[type=file] {
  position: absolute;
  inset: 0;
  opacity: 0;
  cursor: pointer;
  width: 100%;
  height: 100%;
}

.dropzone-icon {
  font-size: 2.75rem;
  margin-bottom: .75rem;
  display: block;
  color: var(--clr-accent);
  transition: var(--transition);
}

.dropzone:hover .dropzone-icon,
.dropzone.drag-over .dropzone-icon {
  transform: scale(1.12);
}

.dropzone-text {
  font-size: .95rem;
  color: var(--clr-mid);
  margin-bottom: .35rem;
  line-height: 1.5;
}

.dropzone-text strong {
  color: var(--clr-primary);
  font-weight: 700;
}

.dropzone-hint {
  font-size: .75rem;
  color: var(--clr-muted);
  margin-top: .25rem;
}

/* ─── Progress bar ──────────────────────────────────────────────────────────── */
.progress-wrap {
  margin-top: 1.25rem;
  display: none;
}

.progress-wrap.visible { display: block; }

.progress-bar {
  height: 6px;
  border-radius: 3px;
  background: var(--clr-border);
  overflow: hidden;
}

.progress-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--clr-primary), var(--clr-accent));
  width: 0;
  transition: width .3s ease;
  border-radius: 3px;
}

.progress-label {
  font-size: .75rem;
  color: var(--clr-muted);
  margin-top: .4rem;
  text-align: center;
  font-weight: 500;
}

/* ─── Buttons ───────────────────────────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: .45rem;
  padding: .7rem 1.5rem;
  border-radius: var(--radius-sm);
  border: none;
  cursor: pointer;
  font-size: .9rem;
  font-weight: 600;
  font-family: inherit;
  transition: var(--transition);
  text-decoration: none !important;
  line-height: 1;
  letter-spacing: .1px;
  white-space: nowrap;
}

.btn:focus-visible {
  outline: 3px solid var(--clr-accent);
  outline-offset: 2px;
}

.btn:disabled { opacity: .45; cursor: not-allowed; transform: none !important; box-shadow: none !important; }

.btn-primary {
  background: linear-gradient(135deg, var(--clr-primary), #6d28d9);
  color: #fff !important;
  box-shadow: 0 2px 8px rgba(91,33,182,.35);
}
.btn-primary:hover:not(:disabled) {
  background: linear-gradient(135deg, var(--clr-primary-dark), var(--clr-primary));
  color: #fff !important;
  box-shadow: 0 4px 16px rgba(91,33,182,.45);
  transform: translateY(-1px);
}
.btn-primary:active:not(:disabled) { transform: translateY(0); }

.btn-ghost {
  background: var(--clr-white);
  color: var(--clr-mid) !important;
  border: 1.5px solid var(--clr-border);
}
.btn-ghost:hover:not(:disabled) {
  border-color: var(--clr-accent);
  color: var(--clr-primary) !important;
  background: var(--clr-accent-light);
  transform: translateY(-1px);
}
.btn-ghost:active:not(:disabled) { transform: translateY(0); }

.btn-success {
  background: linear-gradient(135deg, var(--clr-success), #10b981);
  color: #fff !important;
  box-shadow: 0 2px 8px rgba(5,150,105,.3);
}
.btn-success:hover:not(:disabled) {
  background: linear-gradient(135deg, var(--clr-success-dark), var(--clr-success));
  color: #fff !important;
  box-shadow: 0 4px 16px rgba(5,150,105,.4);
  transform: translateY(-1px);
}
.btn-success:active:not(:disabled) { transform: translateY(0); }

.btn-lg {
  padding: .9rem 2rem;
  font-size: 1rem;
  border-radius: var(--radius-sm);
}

.btn-full { width: 100%; }

.btn-row {
  display: flex;
  gap: .75rem;
  flex-wrap: wrap;
  margin-top: 1.25rem;
}

/* ─── Result step action layout ─────────────────────────────────────────────── */
.result-actions {
  display: flex;
  flex-direction: column;
  gap: .75rem;
  margin-top: 1.5rem;
}

.btn-row-secondary {
  display: flex;
  gap: .75rem;
  margin-top: 0;
  flex-wrap: wrap;
}

.btn-row-secondary .btn {
  flex: 1;
  min-width: 0;
}

/* ─── Alert ─────────────────────────────────────────────────────────────────── */
.alert {
  border-radius: var(--radius-sm);
  padding: .85rem 1.1rem;
  font-size: .875rem;
  margin-bottom: 1rem;
  display: none;
}

.alert.visible { display: flex; align-items: flex-start; gap: .5rem; }

.alert-error {
  background: #fef2f2;
  color: var(--clr-error);
  border: 1px solid #fecaca;
}

.alert-success {
  background: #ecfdf5;
  color: var(--clr-success);
  border: 1px solid #a7f3d0;
}

.alert-icon { flex-shrink: 0; font-size: 1rem; margin-top: 1px; }
.alert-msg  { flex: 1; line-height: 1.5; }

/* ─── Cropper section ───────────────────────────────────────────────────────── */
#crop-section { display: none; }

.cropper-wrapper {
  max-height: 440px;
  overflow: hidden;
  border-radius: var(--radius-sm);
  background: #0a0a0a;
  box-shadow: inset 0 0 0 1px rgba(255,255,255,.05);
}

.cropper-wrapper img {
  max-width: 100%;
  display: block;
}

.crop-hint {
  font-size: .78rem;
  color: var(--clr-muted);
  text-align: center;
  margin-top: .6rem;
  font-weight: 500;
}

/* ─── Mask selector ─────────────────────────────────────────────────────────── */
#mask-section { display: none; }

.mask-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(110px, 1fr));
  gap: .85rem;
}

.mask-item {
  border: 2px solid var(--clr-border);
  border-radius: var(--radius-sm);
  overflow: hidden;
  cursor: pointer;
  transition: var(--transition);
  background: #fafafa;
  position: relative;
}

.mask-item:hover {
  border-color: var(--clr-accent);
  transform: translateY(-2px);
  box-shadow: var(--shadow);
}

.mask-item.selected {
  border-color: var(--clr-primary);
  box-shadow: 0 0 0 3px var(--clr-accent-light);
}

.mask-item.selected::after {
  content: '✓';
  position: absolute;
  top: 5px;
  right: 5px;
  font-size: .78rem;
  font-weight: 700;
  color: #fff;
  background: var(--clr-primary);
  border-radius: 50%;
  width: 20px;
  height: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  line-height: 1;
  box-shadow: 0 1px 4px rgba(0,0,0,.25);
}

.mask-thumb {
  width: 100%;
  aspect-ratio: 1;
  object-fit: cover;
  display: block;
  background-image: linear-gradient(45deg, #ddd 25%, transparent 25%),
                    linear-gradient(-45deg, #ddd 25%, transparent 25%),
                    linear-gradient(45deg, transparent 75%, #ddd 75%),
                    linear-gradient(-45deg, transparent 75%, #ddd 75%);
  background-size: 10px 10px;
  background-position: 0 0, 0 5px, 5px -5px, -5px 0;
}

.mask-label {
  font-size: .68rem;
  text-align: center;
  padding: .35rem .25rem;
  font-weight: 600;
  color: var(--clr-mid);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.mask-loading, .mask-empty {
  text-align: center;
  padding: 2.5rem;
  color: var(--clr-muted);
  font-size: .9rem;
  grid-column: 1 / -1;
}

/* ─── Final result ──────────────────────────────────────────────────────────── */
#result-section { display: none; }

.result-preview-wrap {
  display: flex;
  justify-content: center;
  margin-bottom: .5rem;
}

.result-preview {
  width: 100%;
  max-width: 340px;
  aspect-ratio: 1;
  border-radius: var(--radius);
  object-fit: cover;
  box-shadow: var(--shadow-xl);
  border: 3px solid var(--clr-white);
  outline: 1px solid var(--clr-border);
}

/* ─── Spinner ───────────────────────────────────────────────────────────────── */
.spinner {
  display: inline-block;
  width: 16px;
  height: 16px;
  border: 2.5px solid rgba(255,255,255,.35);
  border-top-color: #fff;
  border-radius: 50%;
  animation: spin .65s linear infinite;
  vertical-align: middle;
}

@keyframes spin  { to { transform: rotate(360deg); } }
@keyframes pulse { from { opacity: 1; } to { opacity: .4; } }

/* ─── Social proof ───────────────────────────────────────────────────────────── */
.social-proof {
  margin-top: 1rem;
  text-align: center;
  font-size: .82rem;
  color: var(--clr-muted);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: .35rem;
  background: var(--clr-accent-light);
  border-radius: var(--radius-sm);
  padding: .55rem .9rem;
}

.social-proof::before {
  content: '✓';
  color: var(--clr-success);
  font-weight: 700;
  font-size: .9rem;
}

.social-proof strong {
  color: var(--clr-primary);
  font-weight: 700;
}

/* ─── No-JS fallback ────────────────────────────────────────────────────────── */
.no-js-warning {
  background: #fffbeb;
  color: #92400e;
  border: 1px solid #fde68a;
  border-radius: var(--radius-sm);
  padding: .75rem 1rem;
  margin-bottom: 1rem;
  font-size: .875rem;
  display: none;
}
.no-js .no-js-warning { display: block; }

/* ─── Footer ────────────────────────────────────────────────────────────────── */
footer {
  text-align: center;
  padding: 1.5rem;
  font-size: .75rem;
  color: var(--clr-muted);
  border-top: 1px solid var(--clr-border);
  background: var(--clr-white);
}

.footer-credit {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: .4rem;
}

.footer-logo-link {
  text-decoration: none !important;
  color: inherit;
}

.footer-logo-link:hover .footer-logo-text {
  color: var(--clr-primary);
}

.footer-logo-text {
  font-weight: 700;
  font-size: .8rem;
  color: var(--clr-mid);
  transition: var(--transition);
  letter-spacing: -.3px;
}

.footer-logo-dot {
  color: var(--clr-primary);
  font-weight: 400;
}

/* ─── Responsive tweaks ─────────────────────────────────────────────────────── */
@media (max-width: 480px) {
  .stepper::before { width: 240px; left: calc(50% - 120px); }
  .step { width: 60px; }
  .card { padding: 1.5rem 1.25rem; }
  .btn { font-size: .85rem; padding: .65rem 1.1rem; }
  .btn-lg { padding: .85rem 1.5rem; font-size: .95rem; }
  .mask-grid { grid-template-columns: repeat(auto-fill, minmax(90px, 1fr)); gap: .65rem; }
  .result-preview { max-width: 280px; }
  .dropzone { padding: 2rem 1rem; }
}