/* Tekarab shell for Image Batch Studio.
   Namespaced header/footer plus scoped visual overrides only. */

:root {
  --tkrb-bg: #f7f5ef;
  --tkrb-panel: #fffefa;
  --tkrb-panel-soft: #fbf9f2;
  --tkrb-border: rgba(18, 55, 42, 0.12);
  --tkrb-border-strong: rgba(18, 55, 42, 0.20);
  --tkrb-text: #12372a;
  --tkrb-muted: #65736c;
  --tkrb-green: #1f6f4a;
  --tkrb-green-dark: #12372a;
  --tkrb-green-soft: #eef7f1;
  --tkrb-shadow: 0 4px 14px rgba(18, 55, 42, 0.05);
}

html,
body {
  background: var(--tkrb-bg);
}

.tkrb-img-shell {
  color: var(--tkrb-text);
}

.tkrb-header,
.tkrb-header *,
.tkrb-footer,
.tkrb-footer * {
  box-sizing: border-box;
}

.tkrb-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(251, 249, 242, 0.96);
  color: var(--tkrb-text);
  border-bottom: 1px solid rgba(18, 55, 42, 0.10);
  box-shadow: 0 1px 0 rgba(255, 255, 255, 0.75) inset, 0 8px 24px rgba(18, 55, 42, 0.035);
  -webkit-backdrop-filter: blur(12px);
  backdrop-filter: blur(12px);
}

.tkrb-header-inner {
  max-width: 1290px;
  min-height: 72px;
  margin: 0 auto;
  padding: 0 20px;
  display: flex;
  align-items: center;
  justify-content: flex-start;
  gap: 28px;
  flex-wrap: nowrap;
}

.tkrb-brand {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  flex: 0 0 auto;
  color: var(--tkrb-text);
  text-decoration: none;
  line-height: 1;
}

.tkrb-brand:hover {
  color: var(--tkrb-text);
  text-decoration: none;
}

.tkrb-brand-mark {
  width: 32px;
  height: 32px;
  border-radius: 8px;
  display: inline-grid;
  place-items: center;
  flex: 0 0 auto;
  background: var(--tkrb-green-dark);
  color: #fbf9f2;
  font-size: 15px;
  font-weight: 800;
  line-height: 1;
  letter-spacing: 0;
}

.tkrb-brand-name {
  color: var(--tkrb-text);
  font-size: 18px;
  font-weight: 700;
  line-height: 1;
  letter-spacing: 0;
}

.tkrb-nav {
  display: flex;
  align-items: stretch;
  gap: 20px;
  min-width: 0;
  flex: 1 1 auto;
  flex-wrap: nowrap;
}

.tkrb-nav-link {
  position: relative;
  display: inline-flex;
  align-items: center;
  min-height: 72px;
  padding: 0;
  border: 0;
  background: transparent;
  color: #2f3b4c;
  text-decoration: none;
  font-size: 16px;
  font-weight: 500;
  line-height: 1.15;
  letter-spacing: 0;
  white-space: nowrap;
  transition: color 0.15s ease;
}

.tkrb-nav-link::before {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 16px;
  height: 2px;
  border-radius: 999px;
  background: transparent;
  transition: background 0.15s ease;
}

.tkrb-nav-link:hover,
.tkrb-nav-active {
  color: var(--tkrb-green);
  text-decoration: none;
}

.tkrb-nav-link:hover::before,
.tkrb-nav-active::before {
  background: var(--tkrb-green);
}

.ibs-page {
  max-width: 1320px;
  padding: 24px 24px 60px;
}

.ibs-hero {
  margin-bottom: 18px;
}

.ibs-badge {
  background: var(--tkrb-green-soft);
  color: var(--tkrb-green);
  border: 1px solid rgba(31, 111, 74, 0.13);
  letter-spacing: 0.02em;
}

.ibs-hero h1 {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
  color: var(--tkrb-text);
  font-size: 38px;
  line-height: 1.12;
  letter-spacing: 0;
}

.ibs-lead {
  max-width: 720px;
  color: var(--tkrb-muted);
  font-size: 15px;
}

.ibs-tool-card,
.ibs-result-card,
.ibs-selection-summary,
.ibs-upload-area,
.ibs-preset-btn {
  background: var(--tkrb-panel);
  border-color: var(--tkrb-border);
  box-shadow: var(--tkrb-shadow);
}

.ibs-tool-card {
  border-radius: 12px;
  padding: 24px;
}

.ibs-tool-head {
  border-bottom-color: var(--tkrb-border);
}

.ibs-tool-head h2,
.ibs-section-label,
.ibs-result-card h3,
.ibs-selection-summary strong,
.ibs-result-meta strong,
.ibs-setting label,
.ibs-upload-label,
.ibs-dropzone-title,
.ibs-preset-btn strong {
  color: var(--tkrb-text);
}

.ibs-tool-head p,
.ibs-lead,
.ibs-hint,
.ibs-dropzone-text,
.ibs-preset-btn span,
.ibs-result-meta,
.ibs-checkbox-label,
.ibs-empty {
  color: var(--tkrb-muted);
}

.ibs-upload-area,
.ibs-preview-thumb-wrap {
  background: var(--tkrb-panel-soft);
}

.ibs-form {
  gap: 18px;
}

@media (min-width: 960px) {
  .ibs-form {
    display: grid;
    grid-template-columns: minmax(360px, 0.9fr) minmax(0, 1.1fr);
    column-gap: 22px;
    row-gap: 18px;
    align-items: start;
  }

  .ibs-upload-area {
    grid-column: 1;
    grid-row: 1 / span 3;
    min-height: 100%;
  }

  .ibs-preset-wrap,
  .ibs-settings-grid,
  .ibs-checkbox-row {
    grid-column: 2;
  }

  .ibs-preview-wrap,
  .ibs-actions,
  .ibs-status,
  .ibs-results {
    grid-column: 1 / -1;
  }
}

.ibs-dropzone {
  border-color: rgba(31, 111, 74, 0.28);
  background: #fffefa;
  border-radius: 12px;
}

.ibs-dropzone:hover,
.ibs-dropzone.is-dragover {
  border-color: var(--tkrb-green);
  background: var(--tkrb-green-soft);
  box-shadow: 0 8px 22px rgba(31, 111, 74, 0.10);
}

.ibs-dropzone:focus,
.ibs-setting input:focus,
.ibs-setting select:focus {
  border-color: var(--tkrb-green);
  box-shadow: 0 0 0 4px rgba(31, 111, 74, 0.12);
}

.ibs-dropzone-icon {
  color: var(--tkrb-green);
}

.ibs-setting input,
.ibs-setting select {
  background: #fffefa;
  border-color: var(--tkrb-border);
  color: var(--tkrb-text);
  min-height: 44px;
  border-radius: 10px;
  padding: 0 13px;
  font-size: 14px;
  line-height: 1.45;
}

.ibs-setting label {
  min-height: 17px;
  line-height: 1.35;
}

.ibs-settings-grid {
  align-items: start;
  gap: 14px;
}

.ibs-preset-grid {
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
}

.ibs-preset-btn {
  min-height: 92px;
}

.ibs-preset-btn {
  border-radius: 12px;
}

.ibs-preset-btn:hover,
.ibs-preset-btn.is-active {
  border-color: rgba(31, 111, 74, 0.28);
  background: var(--tkrb-green-soft);
  box-shadow: 0 8px 20px rgba(31, 111, 74, 0.08);
}

.ibs-checkbox-label input {
  accent-color: var(--tkrb-green);
}

.ibs-btn {
  border-radius: 10px;
}

.ibs-btn-primary,
.ibs-download-link {
  background: var(--tkrb-green);
  border-color: var(--tkrb-green);
  color: #fff;
}

.ibs-btn-primary:hover,
.ibs-download-link:hover {
  background: var(--tkrb-green-dark);
  border-color: var(--tkrb-green-dark);
}

.ibs-btn-secondary {
  background: #fffefa;
  border-color: var(--tkrb-border);
  color: var(--tkrb-text);
}

.ibs-btn-secondary:hover {
  background: var(--tkrb-green-soft);
  border-color: rgba(31, 111, 74, 0.28);
  color: var(--tkrb-text);
}

.tkrb-footer {
  margin-top: 42px;
  background: #12372a;
  color: #fbf9f2;
}

.tkrb-footer-inner {
  max-width: 1290px;
  margin: 0 auto;
  padding: 34px 20px 26px;
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 32px;
}

.tkrb-footer-brand {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  max-width: 360px;
}

.tkrb-footer .tkrb-brand-mark {
  background: #fbf9f2;
  color: #12372a;
}

.tkrb-footer-name {
  color: #fbf9f2;
  font-size: 18px;
  font-weight: 800;
}

.tkrb-footer-tag {
  margin: 6px 0 0;
  color: #d7e0d8;
  font-size: 13px;
  line-height: 1.6;
}

.tkrb-footer-groups {
  display: flex;
  flex-wrap: wrap;
  gap: 34px;
}

.tkrb-footer-column {
  display: grid;
  gap: 9px;
  min-width: 150px;
}

.tkrb-footer-column h2 {
  margin: 0 0 4px;
  color: #fbf9f2;
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.tkrb-footer-column a {
  color: #d7e0d8;
  text-decoration: none;
  font-size: 14px;
  font-weight: 600;
}

.tkrb-footer-column a:hover {
  color: #a7d8bb;
}

.tkrb-footer-bottom {
  max-width: 1290px;
  margin: 0 auto;
  padding: 16px 20px 22px;
  border-top: 1px solid rgba(255, 255, 255, 0.10);
  color: #d7e0d8;
  font-size: 12.5px;
}

@media (max-width: 900px) {
  .tkrb-header-inner {
    gap: 18px;
  }

  .tkrb-nav {
    gap: 16px;
    overflow-x: auto;
    scrollbar-width: none;
  }

  .tkrb-nav::-webkit-scrollbar {
    display: none;
  }

  .tkrb-footer-inner {
    flex-direction: column;
  }
}

@media (max-width: 600px) {
  .tkrb-header-inner {
    min-height: 68px;
    padding: 0 16px;
    gap: 16px;
  }

  .tkrb-brand-name {
    font-size: 17px;
  }

  .tkrb-nav-link {
    min-height: 68px;
    font-size: 15px;
  }

  .ibs-hero h1 {
    font-size: 30px;
  }

  .ibs-page {
    padding: 18px 14px 44px;
  }

  .ibs-tool-card {
    padding: 18px 16px;
  }
}