/* =========================================
   Form tạo thiệp — đồng bộ vibe Nhà Yến
   ========================================= */

.form-page-header {
  padding: 120px 24px 48px;
  text-align: center;
  background: var(--c-cream-warm);
}

.form-page-header .section-desc {
  max-width: 520px;
}

/* Layout 2 cột: sidebar + form */
.form-page-layout {
  max-width: 1140px;
  margin: 0 auto 100px;
  padding: 0 24px 48px;
  display: grid;
  grid-template-columns: 220px minmax(0, 1fr);
  gap: 28px;
  align-items: start;
}

/* Sidebar số bước */
.form-sidebar {
  position: sticky;
  top: calc(var(--header-h) + 20px);
  background: #fff;
  border: 1px solid var(--c-line);
  border-radius: var(--radius-lg);
  padding: 22px 16px;
}

.form-sidebar-title {
  font-family: var(--f-serif);
  font-size: 14px;
  color: var(--c-wine);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-bottom: 16px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--c-line);
}

.form-steps {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.form-step-link {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 10px;
  border-radius: var(--radius);
  font-size: 13px;
  color: var(--c-muted);
  text-decoration: none;
  transition: background var(--t-fast), color var(--t-fast);
}

.form-step-link:hover {
  background: var(--c-cream-warm);
  color: var(--c-charcoal);
}

.form-step-link.is-active {
  background: var(--c-cream-warm);
  color: var(--c-wine);
  font-weight: 500;
}

.form-step-num {
  flex-shrink: 0;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  display: grid;
  place-items: center;
  font-size: 12px;
  font-weight: 600;
  font-family: var(--f-serif);
  background: var(--c-cream);
  border: 1.5px solid var(--c-line);
  color: var(--c-muted);
  transition: all var(--t-fast);
}

.form-step-link.is-active .form-step-num {
  background: var(--c-wine);
  border-color: var(--c-wine);
  color: #fff;
}

.form-step-link.is-done .form-step-num {
  background: var(--c-wine);
  border-color: var(--c-wine);
  color: #fff;
}

.form-step-link.is-done .form-step-num::after {
  content: '✓';
  font-size: 13px;
  line-height: 1;
}

.form-step-link.is-done .form-step-num span {
  display: none;
}

.form-sidebar-hint {
  margin-top: 18px;
  padding-top: 14px;
  border-top: 1px solid var(--c-line);
  font-size: 12px;
  color: var(--c-muted);
  line-height: 1.55;
  font-style: italic;
}

.form-sidebar-hint a {
  color: var(--c-wine);
  text-decoration: underline;
  text-underline-offset: 2px;
}

.form-main {
  min-width: 0;
}

/* Tờ form bên phải */
.form-sheet {
  background: #fff;
  padding: 48px 44px 56px;
  border: 1px solid var(--c-line);
  border-radius: var(--radius-lg);
  box-shadow: 0 12px 40px rgba(42, 37, 32, 0.04);
}

.form-toolbar {
  display: flex;
  justify-content: flex-end;
  margin-bottom: 8px;
}

.btn-demo-fill {
  font-size: 12px;
  letter-spacing: 1px;
  text-transform: uppercase;
  color: var(--c-muted);
  background: none;
  border: none;
  border-bottom: 1px solid var(--c-line);
  padding: 4px 0;
  cursor: pointer;
  transition: color var(--t-fast), border-color var(--t-fast);
}

.btn-demo-fill:hover {
  color: var(--c-wine);
  border-color: var(--c-gold);
}

/* Section — giống form cũ: pill wine */
.form-block {
  padding: 36px 0 8px;
  border-top: 1px solid var(--c-line);
  scroll-margin-top: calc(var(--header-h) + 16px);
}

.form-block:first-of-type {
  border-top: none;
  padding-top: 0;
}

.form-block-title {
  font-family: var(--f-serif);
  font-size: 18px;
  font-weight: 500;
  color: #fff;
  background: var(--c-wine);
  padding: 8px 22px;
  border-radius: 100px;
  display: inline-block;
  margin-bottom: 10px;
  letter-spacing: 0.02em;
}

.form-block-lead {
  font-family: var(--f-serif);
  font-style: italic;
  font-size: 15px;
  color: var(--c-muted);
  margin-bottom: 24px;
  line-height: 1.65;
}

.form-block-lead a {
  color: var(--c-wine);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.form-grid-2 {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 18px 24px;
}

.form-grid-2 .form-group.span-2 {
  grid-column: 1 / -1;
}

.form-group label {
  display: block;
  font-weight: 500;
  margin-bottom: 7px;
  color: var(--c-charcoal);
  font-size: 13px;
}

.form-group input,
.form-group textarea,
.form-group select {
  width: 100%;
  padding: 12px 16px;
  border: 1px solid var(--c-line);
  border-radius: var(--radius);
  font-family: var(--f-sans);
  font-size: 15px;
  color: var(--c-text);
  background: var(--c-cream);
  transition: border-color var(--t-fast), background var(--t-fast);
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
  outline: none;
  border-color: var(--c-gold);
  background: #fff;
}

.alert-error {
  background: #fdf6f6;
  color: #7f1d1d;
  padding: 14px 18px;
  border-radius: var(--radius);
  margin-bottom: 24px;
  border-left: 3px solid var(--c-wine);
  font-size: 14px;
}

.error-text {
  color: #b91c1c;
  font-size: 12px;
  margin-top: 5px;
  display: block;
}

.required { color: var(--c-wine); }

/* Chọn mẫu */
.template-select {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
}

.template-option {
  border: 1px solid var(--c-line);
  border-radius: var(--radius);
  padding: 20px 14px 18px;
  text-align: center;
  cursor: pointer;
  background: var(--c-cream);
  transition: border-color var(--t-fast), background var(--t-fast);
  position: relative;
}

.template-option:hover {
  border-color: var(--c-gold-soft);
  background: #fff;
}

.template-option:has(input:checked) {
  border-color: var(--c-wine);
  background: #fff;
  box-shadow: inset 3px 0 0 var(--c-gold);
}

.template-option input { display: none; }

.template-option .tpl-num {
  font-family: var(--f-script);
  font-size: 32px;
  color: var(--c-gold-deep);
  line-height: 1;
  margin-bottom: 8px;
}

.template-option strong {
  display: block;
  font-family: var(--f-serif);
  font-size: 15px;
  margin-bottom: 4px;
  color: var(--c-charcoal);
  font-weight: 500;
}

.template-option small {
  font-size: 12px;
  color: var(--c-muted);
  line-height: 1.45;
}

/* Ảnh */
.image-slots-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px 18px;
}

.image-slot {
  padding: 0;
}

.image-slot[data-slot="gallery"],
.image-slot[data-slot="hero"] {
  grid-column: 1 / -1;
}

.image-slot-head {
  margin-bottom: 10px;
}

.image-slot-head strong {
  font-family: var(--f-serif);
  font-size: 16px;
  color: var(--c-charcoal);
  font-weight: 500;
  display: block;
}

.image-slot-head span {
  font-size: 12px;
  color: var(--c-muted);
  display: block;
  margin-top: 3px;
  line-height: 1.5;
}

.slot-badge {
  font-size: 11px;
  color: var(--c-muted);
  font-style: italic;
  margin-top: 4px;
  display: inline-block;
}

.slot-badge.required {
  color: var(--c-wine);
  font-style: normal;
}

.image-slot.is-uploading .dropzone {
  opacity: 0.7;
  pointer-events: none;
}

/* Dropzone — tối giản, giấy mời */
.dropzone {
  position: relative;
  border: 1px dashed var(--c-gold-soft);
  border-radius: var(--radius);
  background: var(--c-cream);
  cursor: pointer;
  overflow: hidden;
  transition: border-color var(--t-fast), background var(--t-fast);
  min-height: 130px;
}

.dropzone[data-aspect="hero"]     { aspect-ratio: 21 / 9; min-height: 0; }
.dropzone[data-aspect="portrait"] { aspect-ratio: 3 / 4; max-width: 200px; }
.dropzone[data-aspect="wide"]     { aspect-ratio: 4 / 3; }

.dropzone:hover {
  border-color: var(--c-gold);
  background: #fff;
}

.dropzone.is-dragover {
  border-color: var(--c-wine);
  background: #fff;
  border-style: solid;
}

.dropzone.has-preview .dropzone-empty { display: none; }
.dropzone:not(.has-preview) .dropzone-preview { display: none; }

.dropzone-empty {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 16px;
  text-align: center;
  pointer-events: none;
}

.dropzone-empty p {
  font-family: var(--f-serif);
  font-size: 15px;
  color: var(--c-charcoal);
  margin: 0;
}

.dropzone-empty span {
  font-size: 11px;
  color: var(--c-muted);
  letter-spacing: 0.3px;
}

.dropzone-preview {
  position: absolute;
  inset: 0;
}

.dropzone-preview img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.dropzone-overlay {
  position: absolute;
  inset: 0;
  background: rgba(42, 37, 32, 0.45);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  opacity: 0;
  transition: opacity var(--t-fast);
}

.dropzone.has-preview:hover .dropzone-overlay {
  opacity: 1;
}

.dropzone-btn {
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.8px;
  text-transform: uppercase;
  padding: 8px 14px;
  border-radius: var(--radius);
  border: 1px solid rgba(255, 255, 255, 0.5);
  cursor: pointer;
  background: rgba(255, 255, 255, 0.92);
  color: var(--c-charcoal);
  transition: background var(--t-fast);
}

.dropzone-btn:hover {
  background: #fff;
}

.dropzone-remove {
  background: transparent;
  color: #fff;
  border-color: rgba(255, 255, 255, 0.6);
}

.dropzone-remove:hover {
  background: var(--c-wine);
  border-color: var(--c-wine);
}

.dropzone-progress {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--c-line);
  opacity: 0;
}

.dropzone.is-uploading .dropzone-progress { opacity: 1; }

.dropzone-progress-bar {
  height: 100%;
  width: 35%;
  background: var(--c-gold);
  animation: uploadSlide 1.2s ease-in-out infinite;
}

@keyframes uploadSlide {
  0%   { margin-left: 0; }
  100% { margin-left: 65%; }
}

.slot-file { display: none; }

.slot-status {
  font-size: 12px;
  margin-top: 8px;
  min-height: 18px;
  color: var(--c-muted);
  font-style: italic;
}

.slot-status.is-error {
  color: #b91c1c;
  font-style: normal;
}

.slot-status.is-success {
  color: var(--c-wine-soft);
  font-style: normal;
}

/* Gallery */
.gallery-dropzone {
  min-height: 100px;
}

.gallery-count {
  font-size: 12px;
  color: var(--c-muted);
  margin-bottom: 10px;
  font-style: italic;
}

.gallery-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(80px, 1fr));
  gap: 8px;
  margin-bottom: 12px;
}

.gallery-grid:empty {
  display: none;
  margin: 0;
}

.gallery-thumb {
  position: relative;
  aspect-ratio: 1;
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--c-line);
}

.gallery-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.gallery-thumb.is-pending {
  opacity: 0.55;
}

.gallery-thumb .thumb-progress {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--c-line);
}

.gallery-thumb .thumb-progress span {
  display: block;
  height: 100%;
  width: 40%;
  background: var(--c-gold);
  animation: uploadSlide 1s ease-in-out infinite;
}

.gallery-remove {
  position: absolute;
  top: 0;
  right: 0;
  width: 22px;
  height: 22px;
  border: none;
  background: var(--c-wine);
  color: #fff;
  cursor: pointer;
  font-size: 14px;
  line-height: 1;
  opacity: 0;
  transition: opacity var(--t-fast);
}

.gallery-thumb:hover .gallery-remove {
  opacity: 1;
}

/* Submit */
.form-submit-wrap {
  margin-top: 40px;
  padding-top: 32px;
  border-top: 1px solid var(--c-line);
  text-align: center;
}

.form-submit-wrap .btn-primary {
  min-width: 280px;
  padding: 16px 40px;
}

.form-submit-note {
  margin-top: 14px;
  font-size: 12px;
  color: var(--c-muted);
  font-style: italic;
}

@media (max-width: 960px) {
  .form-page-layout {
    grid-template-columns: 1fr;
    padding: 0 16px 48px;
  }

  .form-sidebar {
    position: static;
    padding: 14px;
  }

  .form-sidebar-title,
  .form-sidebar-hint {
    display: none;
  }

  .form-steps {
    flex-direction: row;
    flex-wrap: wrap;
    gap: 8px;
  }

  .form-step-link {
    padding: 6px;
    font-size: 0;
    gap: 0;
  }

  .form-step-link .form-step-label {
    display: none;
  }

  .form-step-num {
    width: 34px;
    height: 34px;
    font-size: 13px;
  }
}

@media (max-width: 640px) {
  .form-sheet {
    padding: 28px 20px 36px;
  }

  .form-grid-2,
  .template-select,
  .image-slots-grid {
    grid-template-columns: 1fr;
  }

  .dropzone[data-aspect="portrait"] {
    max-width: none;
  }

  .form-submit-wrap .btn-primary {
    width: 100%;
    min-width: 0;
  }
}