/* ---------- Design tokens ---------- */
:root {
  --color-bg: #f7f7fb;
  --color-surface: #ffffff;
  --color-border: #d9dbe3;
  --color-border-strong: #b7bacb;
  --color-text: #1c1d26;
  --color-text-muted: #5c5f70;
  --color-primary: #4338ca;
  --color-primary-hover: #362da3;
  --color-primary-active: #2c2585;
  --color-focus: #2563eb;
  --color-info-bg: #eef4ff;
  --color-info-border: #bcd3fb;
  --color-info-text: #1e3a75;
  --color-error-bg: #fdecec;
  --color-error-border: #f3b6b6;
  --color-error-text: #7a1f1f;
  --color-success-bg: #eefaf0;
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 14px;
  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-5: 24px;
  --space-6: 32px;
  --space-7: 48px;
  --max-width: 720px;
  --max-width-wide: 960px;
}

* {
  box-sizing: border-box;
}

html, body {
  margin: 0;
  padding: 0;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.5;
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.page {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: var(--space-5) var(--space-4) var(--space-7);
}

/* ---------- Header / footer ---------- */
.site-header {
  text-align: center;
  margin-bottom: var(--space-6);
}

.site-header h1 {
  font-size: 1.75rem;
  margin: 0 0 var(--space-2);
}

.tagline {
  color: var(--color-text-muted);
  margin: 0;
  font-size: 1rem;
}

.site-footer {
  margin-top: var(--space-7);
  text-align: center;
  color: var(--color-text-muted);
  font-size: 0.8125rem;
}

/* ---------- Banners ---------- */
.banner {
  border-radius: var(--radius-md);
  padding: var(--space-4);
  margin-bottom: var(--space-5);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
  flex-wrap: wrap;
}

.banner p {
  margin: 0;
}

.banner-info {
  background: var(--color-info-bg);
  border: 1px solid var(--color-info-border);
  color: var(--color-info-text);
}

.banner-error {
  background: var(--color-error-bg);
  border: 1px solid var(--color-error-border);
  color: var(--color-error-text);
}

/* ---------- Upload section ---------- */
.upload-section {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-5);
  margin-bottom: var(--space-5);
}

.dropzones {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-4);
}

@media (min-width: 640px) {
  .dropzones {
    grid-template-columns: 1fr 1fr;
  }
}

.dropzone-group {
  display: flex;
  flex-direction: column;
}

.dropzone-label {
  font-weight: 600;
  margin-bottom: var(--space-2);
}

.dropzone {
  position: relative;
  border: 2px dashed var(--color-border-strong);
  border-radius: var(--radius-md);
  min-height: 180px;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: var(--space-4);
  cursor: pointer;
  background: var(--color-bg);
  transition: border-color 0.15s ease, background-color 0.15s ease;
}

.dropzone:hover {
  border-color: var(--color-primary);
  background: #f2f1fc;
}

.dropzone:focus-visible {
  outline: 3px solid var(--color-focus);
  outline-offset: 2px;
}

.dropzone.dragover {
  border-color: var(--color-primary);
  background: #eceafb;
  transform: scale(1.01);
}

.dropzone.has-image {
  padding: var(--space-2);
  border-style: solid;
  border-color: #8fd6a8;
  background: #f5fbf7;
}

.dropzone.rejected {
  border-color: var(--color-error-border);
  background: var(--color-error-bg);
}

@media (prefers-reduced-motion: no-preference) {
  .dropzone {
    transition: border-color 0.15s ease, background-color 0.15s ease, transform 0.15s ease;
  }

  .dropzone.accepted {
    animation: dropzone-pop 0.5s ease-out;
  }

  .dropzone.rejected {
    animation: dropzone-shake 0.45s ease-in-out;
  }
}

@keyframes dropzone-pop {
  0% {
    transform: scale(1);
    box-shadow: 0 0 0 0 rgba(67, 56, 202, 0);
  }
  45% {
    transform: scale(1.025);
    box-shadow: 0 0 0 6px rgba(67, 56, 202, 0.14);
  }
  100% {
    transform: scale(1);
    box-shadow: 0 0 0 0 rgba(67, 56, 202, 0);
  }
}

@keyframes dropzone-shake {
  10%, 90% { transform: translateX(-1px); }
  20%, 80% { transform: translateX(2px); }
  30%, 50%, 70% { transform: translateX(-4px); }
  40%, 60% { transform: translateX(4px); }
}

.accept-badge {
  position: absolute;
  top: 8px;
  right: 8px;
  width: 26px;
  height: 26px;
  border-radius: 50%;
  background: #2f9e57;
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transform: scale(0.5);
}

.accept-badge:not([hidden]) {
  opacity: 1;
  transform: scale(1);
}

@media (prefers-reduced-motion: no-preference) {
  .accept-badge {
    transition: opacity 0.25s ease, transform 0.25s ease;
  }
}

.dropzone-content {
  color: var(--color-text-muted);
}

.dropzone-content p {
  margin: var(--space-1) 0;
}

.upload-icon {
  width: 32px;
  height: 32px;
  color: var(--color-text-muted);
  margin-bottom: var(--space-2);
}

.dropzone-hint {
  font-size: 0.8125rem;
}

.dropzone-preview {
  max-width: 100%;
  max-height: 200px;
  border-radius: var(--radius-sm);
  object-fit: contain;
}

.field-error {
  color: var(--color-error-text);
  font-size: 0.8125rem;
  margin: var(--space-2) 0 0;
  min-height: 1em;
}

.privacy-notice {
  font-size: 0.8125rem;
  color: var(--color-text-muted);
  margin: var(--space-4) 0 0;
  text-align: center;
}

.submit-row {
  display: flex;
  justify-content: center;
  margin-top: var(--space-5);
}

/* ---------- Buttons ---------- */
.btn {
  font: inherit;
  font-weight: 600;
  border-radius: var(--radius-md);
  padding: var(--space-3) var(--space-5);
  border: 1px solid transparent;
  cursor: pointer;
  display: inline-block;
  text-decoration: none;
  text-align: center;
  transition: background-color 0.15s ease, border-color 0.15s ease, transform 0.1s ease, box-shadow 0.15s ease;
}

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

.btn-primary {
  background: var(--color-primary);
  color: #fff;
}

.btn-primary:hover:not(:disabled) {
  background: var(--color-primary-hover);
  transform: translateY(-1px);
  box-shadow: 0 4px 10px rgba(67, 56, 202, 0.25);
}

.btn-primary:active:not(:disabled) {
  background: var(--color-primary-active);
  transform: translateY(0);
  box-shadow: none;
}

.btn-primary:disabled {
  background: #b9b6e6;
  cursor: not-allowed;
}

.btn-secondary {
  background: var(--color-surface);
  color: var(--color-primary);
  border-color: var(--color-primary);
}

.btn-secondary:hover {
  background: #f2f1fc;
  transform: translateY(-1px);
}

.btn-secondary:active {
  background: #e6e4f9;
  transform: translateY(0);
}

.btn-ghost {
  background: transparent;
  color: var(--color-text-muted);
  border-color: var(--color-border-strong);
}

.btn-ghost:hover {
  background: var(--color-bg);
  color: var(--color-text);
  border-color: var(--color-text-muted);
  transform: translateY(-1px);
}

.btn-ghost:active {
  transform: translateY(0);
}

@media (prefers-reduced-motion: reduce) {
  .btn-primary:hover:not(:disabled),
  .btn-secondary:hover,
  .btn-ghost:hover {
    transform: none;
  }
}

/* ---------- Loading state ---------- */
.loading-state {
  display: flex;
  align-items: flex-start;
  justify-content: center;
  gap: var(--space-3);
  margin-top: var(--space-5);
  color: var(--color-text-muted);
}

.loading-copy {
  flex: 1;
  max-width: 320px;
}

.loading-status-text {
  margin: 0;
  font-weight: 600;
  color: var(--color-text);
}

.loading-substatus {
  margin: var(--space-1) 0 var(--space-3);
  font-size: 0.8125rem;
}

.progress-track {
  height: 6px;
  border-radius: 999px;
  background: var(--color-border);
  overflow: hidden;
}

.progress-bar {
  height: 100%;
  width: 0%;
  border-radius: 999px;
  background: linear-gradient(90deg, var(--color-primary), var(--color-focus));
}

@media (prefers-reduced-motion: no-preference) {
  .progress-bar {
    transition: width 0.6s ease-out;
  }
}

.spinner {
  width: 22px;
  height: 22px;
  border: 3px solid var(--color-border);
  border-top-color: var(--color-primary);
  border-radius: 50%;
  display: inline-block;
  animation: spin 0.8s linear infinite;
  flex-shrink: 0;
  margin-top: 2px;
}

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

@media (prefers-reduced-motion: reduce) {
  .spinner {
    animation-duration: 2s;
  }
}

/* ---------- Result section ---------- */
.result-section {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-5);
  margin-bottom: var(--space-5);
  text-align: center;
}

.result-section h2 {
  margin-top: 0;
}

#result-heading:focus-visible,
#result-heading:focus {
  outline: 3px solid var(--color-focus);
  outline-offset: 4px;
  border-radius: var(--radius-sm);
}

.reveal-stage {
  position: relative;
  display: inline-block;
  max-width: 100%;
}

.result-image {
  max-width: 100%;
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
  display: block;
}

.reveal-main {
  opacity: 0;
  transform: scale(0.96);
}

.reveal-stage.revealed .reveal-main {
  opacity: 1;
  transform: scale(1);
}

@media (prefers-reduced-motion: no-preference) {
  .reveal-main {
    transition: opacity 0.6s ease, transform 0.6s ease;
  }
}

.reveal-before-badge {
  position: absolute;
  top: 10px;
  left: 10px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  opacity: 0;
  transform: translateY(-6px) scale(0.85);
}

.reveal-stage.badge-visible .reveal-before-badge {
  opacity: 1;
  transform: translateY(0) scale(1);
}

@media (prefers-reduced-motion: no-preference) {
  .reveal-before-badge {
    transition: opacity 0.4s ease 0.15s, transform 0.4s ease 0.15s;
  }
}

.reveal-before-badge img {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  object-fit: cover;
  border: 2px solid #fff;
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.25);
}

.reveal-before-label {
  font-size: 0.6875rem;
  font-weight: 600;
  color: #fff;
  background: rgba(0, 0, 0, 0.55);
  padding: 1px 8px;
  border-radius: 999px;
}

.result-actions {
  margin-top: var(--space-4);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-3);
  flex-wrap: wrap;
}

/* ---------- Feedback section ---------- */
.feedback-section {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-5);
}

.feedback-section h2 {
  margin-top: 0;
}

.feedback-field {
  border: none;
  padding: 0;
  margin: 0 0 var(--space-4);
}

.feedback-field legend {
  font-weight: 600;
  margin-bottom: var(--space-2);
  padding: 0;
}

.field-label {
  font-weight: 600;
  display: block;
  margin-bottom: var(--space-2);
}

.radio-option {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-weight: 400;
  margin-right: var(--space-3);
  padding: var(--space-2) var(--space-3);
  border: 1px solid var(--color-border-strong);
  border-radius: 999px;
  cursor: pointer;
}

.radio-option input {
  cursor: pointer;
  accent-color: var(--color-primary);
}

.radio-option:hover {
  border-color: var(--color-primary);
}

.radio-option.selected {
  background: #eceafb;
  border-color: var(--color-primary);
  color: var(--color-primary);
}

@media (prefers-reduced-motion: no-preference) {
  .radio-option {
    transition: background-color 0.2s ease, border-color 0.2s ease, transform 0.15s ease;
  }

  .radio-option.pop {
    animation: chip-pop 0.35s ease;
  }
}

@keyframes chip-pop {
  40% {
    transform: scale(1.06);
  }
}

textarea {
  width: 100%;
  font: inherit;
  padding: var(--space-3);
  border: 1px solid var(--color-border-strong);
  border-radius: var(--radius-sm);
  resize: vertical;
}

textarea:focus-visible {
  outline: 3px solid var(--color-focus);
  outline-offset: 1px;
}

.feedback-thanks {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  color: #1a7a37;
  font-weight: 600;
  margin-top: var(--space-3);
}

.thanks-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 22px;
  height: 22px;
  border-radius: 50%;
  background: #2f9e57;
  color: #fff;
  flex-shrink: 0;
}

@media (prefers-reduced-motion: no-preference) {
  .feedback-thanks:not([hidden]) {
    animation: thanks-pop 0.5s ease;
  }
}

@keyframes thanks-pop {
  0% {
    transform: scale(0.85);
    opacity: 0;
  }
  60% {
    transform: scale(1.04);
    opacity: 1;
  }
  100% {
    transform: scale(1);
  }
}

@media (max-width: 480px) {
  .page {
    padding: var(--space-4) var(--space-3) var(--space-6);
  }

  .upload-section,
  .result-section,
  .feedback-section {
    padding: var(--space-4);
    border-radius: var(--radius-md);
  }
}

/* ==========================================================================
   Phase 2 additions below — shared site nav, generic cards/forms, and the
   landing/pricing/auth/account/studio3d pages. Additive only; nothing above
   this line changes existing studio.html markup, ids, or behavior.
   ========================================================================== */

/* ---------- Page width variants ---------- */
.page--wide {
  max-width: var(--max-width-wide);
}

/* ---------- Shared site nav ---------- */
.site-nav {
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  position: sticky;
  top: 0;
  z-index: 20;
}

.site-nav-inner {
  max-width: var(--max-width-wide);
  margin: 0 auto;
  padding: var(--space-3) var(--space-4);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  flex-wrap: wrap;
}

.site-nav-brand {
  font-weight: 700;
  font-size: 1.125rem;
  color: var(--color-text);
  text-decoration: none;
}

.site-nav-brand:focus-visible {
  outline: 3px solid var(--color-focus);
  outline-offset: 2px;
  border-radius: var(--radius-sm);
}

.site-nav-links {
  list-style: none;
  display: flex;
  align-items: center;
  gap: var(--space-4);
  margin: 0;
  padding: 0;
  flex-wrap: wrap;
}

.site-nav-link {
  color: var(--color-text-muted);
  text-decoration: none;
  font-weight: 600;
  font-size: 0.9375rem;
  padding: var(--space-1) 0;
  border-bottom: 2px solid transparent;
  background: none;
  border-left: none;
  border-right: none;
  border-top: none;
  font: inherit;
  font-weight: 600;
  cursor: pointer;
}

.site-nav-link:hover {
  color: var(--color-text);
  border-bottom-color: var(--color-border-strong);
}

.site-nav-link:focus-visible {
  outline: 3px solid var(--color-focus);
  outline-offset: 2px;
}

.site-nav-link-cta {
  background: var(--color-primary);
  color: #fff;
  padding: var(--space-2) var(--space-4);
  border-radius: 999px;
}

.site-nav-link-cta:hover {
  background: var(--color-primary-hover);
  color: #fff;
  border-bottom-color: transparent;
}

.pro-badge {
  display: inline-block;
  background: var(--color-primary);
  color: #fff;
  font-size: 0.6875rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  text-transform: uppercase;
  padding: 2px 8px;
  border-radius: 999px;
  vertical-align: middle;
  margin-left: var(--space-1);
}

@media (max-width: 640px) {
  .site-nav-inner {
    padding: var(--space-3);
  }

  .site-nav-links {
    gap: var(--space-3);
  }
}

/* ---------- Generic card ---------- */
.card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-5);
  margin-bottom: var(--space-5);
}

/* ---------- Inline loading (spinner + short status text) ---------- */
.inline-loading {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  color: var(--color-text-muted);
  margin: 0;
}

/* ---------- Banners: success variant (info/error already defined above) --- */
.banner-success {
  background: var(--color-success-bg);
  border: 1px solid #bfe5c9;
  color: #1a7a37;
}

/* ---------- Text inputs (email/password) ---------- */
.form-field {
  margin-bottom: var(--space-4);
}

.text-input {
  width: 100%;
  font: inherit;
  padding: var(--space-3);
  border: 1px solid var(--color-border-strong);
  border-radius: var(--radius-sm);
  background: var(--color-surface);
  color: var(--color-text);
}

.text-input:focus-visible {
  outline: 3px solid var(--color-focus);
  outline-offset: 1px;
}

.text-input[aria-invalid="true"] {
  border-color: var(--color-error-border);
}

.field-hint {
  font-size: 0.8125rem;
  color: var(--color-text-muted);
  margin: var(--space-1) 0 0;
}

.field-error a {
  color: inherit;
  text-decoration: underline;
}

/* ---------- Auth pages (login/signup) ---------- */
.auth-card {
  max-width: 420px;
  margin: 0 auto;
}

.auth-alt-link {
  text-align: center;
  margin: var(--space-4) 0 0;
  font-size: 0.9375rem;
  color: var(--color-text-muted);
}

.auth-alt-link a {
  color: var(--color-primary);
  font-weight: 600;
}

/* ---------- Landing page ---------- */
.hero {
  text-align: center;
  padding: var(--space-6) 0 var(--space-5);
}

.hero h1 {
  font-size: 2.25rem;
  margin: 0 0 var(--space-3);
}

.hero-subtitle {
  font-size: 1.125rem;
  color: var(--color-text-muted);
  max-width: 560px;
  margin: 0 auto var(--space-5);
}

.hero-actions {
  display: flex;
  gap: var(--space-3);
  justify-content: center;
  flex-wrap: wrap;
}

.hero-note {
  margin: var(--space-3) 0 0;
  font-size: 0.8125rem;
  color: var(--color-text-muted);
}

.section-heading {
  text-align: center;
  margin: 0 0 var(--space-5);
}

.steps-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-4);
}

@media (min-width: 640px) {
  .steps-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

.step-card {
  text-align: center;
}

.step-number {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: var(--color-primary);
  color: #fff;
  font-weight: 700;
  margin-bottom: var(--space-3);
}

.step-card h3 {
  margin: 0 0 var(--space-2);
}

.step-card p {
  color: var(--color-text-muted);
  margin: 0;
}

.value-prop {
  text-align: center;
}

.value-prop p {
  color: var(--color-text-muted);
  max-width: 560px;
  margin: 0 auto var(--space-4);
}

/* ---------- Pricing page ---------- */
.pricing-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-5);
  align-items: start;
}

@media (min-width: 640px) {
  .pricing-grid {
    grid-template-columns: 1fr 1fr;
  }
}

.pricing-card {
  display: flex;
  flex-direction: column;
  margin-bottom: 0;
}

.pricing-card-pro {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 1px var(--color-primary);
}

.pricing-card h2 {
  margin-top: 0;
}

.pricing-price {
  color: var(--color-text-muted);
  margin: 0 0 var(--space-3);
}

.pricing-features {
  list-style: none;
  padding: 0;
  margin: 0 0 var(--space-5);
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  flex: 1;
}

.pricing-features li {
  padding-left: 1.5em;
  position: relative;
}

.pricing-features li::before {
  content: "\2713";
  position: absolute;
  left: 0;
  color: #2f9e57;
  font-weight: 700;
}

.pro-plan-status {
  font-weight: 600;
  color: var(--color-primary);
  margin: 0 0 var(--space-3);
}

/* ---------- Account page ---------- */
.account-details {
  margin: 0 0 var(--space-5);
}

.account-detail-row {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: var(--space-3);
  padding: var(--space-3) 0;
  border-bottom: 1px solid var(--color-border);
}

.account-detail-row:last-child {
  border-bottom: none;
}

.account-detail-row dt {
  font-weight: 600;
  color: var(--color-text-muted);
  margin: 0;
}

.account-detail-row dd {
  margin: 0;
  font-weight: 600;
  text-align: right;
}

/* ---------- Studio 3D page ---------- */
.studio3d-hero p {
  color: var(--color-text-muted);
  margin: var(--space-3) 0 0;
}

@media (max-width: 480px) {
  .hero h1 {
    font-size: 1.75rem;
  }

  .card {
    padding: var(--space-4);
    border-radius: var(--radius-md);
  }
}