:root {
  --bg-dark: #0a0c10;
  --bg-card: rgba(22, 27, 34, 0.75);
  --bg-card-hover: rgba(30, 38, 48, 0.85);
  --border-color: rgba(255, 255, 255, 0.12);
  --border-accent: rgba(99, 102, 241, 0.5);
  
  --primary: #6366f1;
  --primary-hover: #4f46e5;
  --accent: #ec4899;
  --accent-hover: #db2777;
  --success: #10b981;
  --text-main: #f3f4f6;
  --text-muted: #9ca3af;
  --text-dim: #6b7280;

  --font-sans: 'Noto Sans KR', 'Outfit', -apple-system, sans-serif;
  --font-mono: 'Fira Code', monospace;
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
}

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

body {
  background-color: var(--bg-dark);
  background-image: 
    radial-gradient(circle at 15% 15%, rgba(99, 102, 241, 0.15) 0%, transparent 45%),
    radial-gradient(circle at 85% 85%, rgba(236, 72, 153, 0.12) 0%, transparent 45%);
  color: var(--text-main);
  font-family: var(--font-sans);
  min-height: 100vh;
  overflow-x: hidden;
}

/* App Container Layout */
.app-container {
  display: flex;
  min-height: 100vh;
}

/* Sidebar */
.sidebar {
  width: 260px;
  background: rgba(13, 17, 23, 0.9);
  backdrop-filter: blur(16px);
  border-right: 1px solid var(--border-color);
  display: flex;
  flex-direction: column;
  padding: 24px 16px;
  flex-shrink: 0;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 0 12px 28px 12px;
  border-bottom: 1px solid var(--border-color);
}

.brand-logo {
  width: 44px;
  height: 44px;
  border-radius: 12px;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  color: #fff;
  box-shadow: 0 0 20px rgba(99, 102, 241, 0.4);
}

.brand-text h2 {
  font-size: 18px;
  font-weight: 800;
  letter-spacing: -0.5px;
  color: #fff;
}

.brand-text span {
  font-size: 11px;
  color: var(--primary);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1px;
}

.nav-menu {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-top: 24px;
  flex: 1;
}

/* Tabs & Panel Switcher */
.tab-panel {
  display: none !important;
}

.tab-panel.active {
  display: block !important;
  animation: fadeIn 0.3s ease-in-out;
}

.nav-item {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 12px 16px;
  border-radius: var(--radius-sm);
  background: transparent;
  border: none;
  color: var(--text-muted);
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s ease;
  text-align: left;
}

.nav-item i {
  font-size: 16px;
  width: 20px;
}

.nav-item:hover {
  background: rgba(255, 255, 255, 0.05);
  color: var(--text-main);
}

.nav-item.active {
  background: linear-gradient(90deg, rgba(99, 102, 241, 0.2), rgba(99, 102, 241, 0.05));
  color: #fff;
  border-left: 3px solid var(--primary);
}

.nav-item.active i {
  color: var(--primary);
}

.sidebar-footer {
  padding-top: 16px;
  border-top: 1px solid var(--border-color);
}

.api-doc-link {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px;
  border-radius: var(--radius-sm);
  background: rgba(255, 255, 255, 0.04);
  color: var(--text-muted);
  text-decoration: none;
  font-size: 13px;
  font-weight: 500;
  transition: all 0.2s ease;
}

.api-doc-link:hover {
  background: rgba(255, 255, 255, 0.08);
  color: var(--text-main);
}

/* Main Content */
.main-content {
  flex: 1;
  padding: 32px 40px;
  overflow-y: auto;
  max-width: 1600px;
}

/* Top Header */
.top-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 24px;
}

.header-title h1 {
  font-size: 28px;
  font-weight: 800;
  letter-spacing: -0.5px;
  margin-bottom: 6px;
}

.header-title p {
  color: var(--text-muted);
  font-size: 14px;
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 14px;
  border-radius: 20px;
  font-size: 12px;
  font-weight: 700;
}

.badge-success {
  background: rgba(16, 185, 129, 0.15);
  color: var(--success);
  border: 1px solid rgba(16, 185, 129, 0.3);
}

/* Glass Panels */
.glass-panel {
  background: var(--bg-card);
  backdrop-filter: blur(20px);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 24px;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
}

/* Visual Template Style Preview Bar */
.template-style-preview-container {
  margin-bottom: 28px;
}

.section-label {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 16px;
  font-size: 14px;
  color: var(--text-main);
}

.section-label i {
  color: var(--primary);
}

.section-label .sub-label {
  font-size: 12px;
  color: var(--text-muted);
  margin-left: 6px;
  font-weight: 400;
}

.visual-template-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 16px;
}

.visual-tpl-card {
  background: rgba(10, 12, 16, 0.7);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  padding: 12px;
  cursor: pointer;
  transition: all 0.25 ease;
  display: flex;
  flex-direction: column;
  align-items: center;
  position: relative;
  overflow: hidden;
}

.visual-tpl-card:hover {
  transform: translateY(-3px);
  border-color: rgba(255, 255, 255, 0.3);
  background: rgba(30, 38, 48, 0.8);
}

.visual-tpl-card.selected {
  border-color: var(--primary);
  box-shadow: 0 0 20px rgba(99, 102, 241, 0.4);
  background: rgba(99, 102, 241, 0.12);
}

.visual-mini-stage {
  width: 100%;
  height: 110px;
  border-radius: 6px;
  background-size: cover;
  background-position: center;
  position: relative;
  overflow: hidden;
  margin-bottom: 10px;
  border: 1px solid rgba(255, 255, 255, 0.1);
}

.visual-tpl-title {
  font-size: 13px;
  font-weight: 700;
  color: #fff;
  text-align: center;
}

.visual-tpl-type {
  font-size: 10px;
  color: var(--primary);
  font-family: var(--font-mono);
  margin-top: 2px;
}

/* Mini visual styles inside cards */
.mini-card-modern {
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(0,0,0,0.95) 0%, transparent 80%);
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  padding: 8px;
}
.mini-card-modern .mini-badge { background: rgba(255,255,255,0.3); font-size: 7px; padding: 1px 4px; border-radius: 4px; color: #fff; width: fit-content; margin-bottom: 2px; }
.mini-card-modern .mini-title { font-size: 10px; font-weight: 800; color: #fff; line-height: 1.1; }

.mini-subtitle-bottom {
  position: absolute;
  bottom: 8px; left: 8px; right: 8px;
  background: rgba(0,0,0,0.8);
  border-radius: 6px;
  padding: 4px 8px;
  text-align: center;
}
.mini-subtitle-bottom .mini-sub-t { font-size: 8px; color: #ffd700; font-weight: 700; }
.mini-subtitle-bottom .mini-sub-m { font-size: 9px; color: #fff; font-weight: 700; }

.mini-quote-center {
  position: absolute;
  inset: 0;
  background: rgba(0,0,0,0.5);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 8px;
}
.mini-quote-center .mini-quote-box {
  background: rgba(255,255,255,0.15);
  backdrop-filter: blur(4px);
  border: 1px solid rgba(255,255,255,0.3);
  border-radius: 8px;
  padding: 6px 10px;
  text-align: center;
  color: #fff;
  width: 90%;
}
.mini-quote-center .mini-q-title { font-size: 9px; font-weight: 800; }

.mini-banner-gradient {
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(0,0,0,0.7) 0%, transparent 40%, rgba(0,0,0,0.9) 100%);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  padding: 6px;
}
.mini-banner-gradient .mini-b-tag { background: #ff3366; color: #fff; font-size: 7px; padding: 2px 5px; border-radius: 3px; font-weight: 700; width: fit-content; }
.mini-banner-gradient .mini-b-title { font-size: 9px; color: #fff; font-weight: 800; }

.mini-cinematic-bar {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}
.mini-cinematic-bar .mini-bar-top { height: 16px; background: #000; }
.mini-cinematic-bar .mini-bar-bottom { height: 22px; background: #000; display: flex; align-items: center; justify-content: center; color: #fff; font-size: 8px; font-weight: 700; }

/* Studio Layout */
.studio-grid {
  display: grid;
  grid-template-columns: 1fr 1.15fr;
  gap: 32px;
}

/* Quick Image Picker */
.quick-image-picker {
  margin-top: 10px;
}

.picker-label {
  font-size: 11px;
  color: var(--text-muted);
  display: block;
  margin-bottom: 6px;
}

.picker-thumbnails {
  display: flex;
  gap: 8px;
}

.picker-thumbnails img.thumb {
  width: 48px;
  height: 48px;
  border-radius: 6px;
  object-fit: cover;
  cursor: pointer;
  border: 2px solid transparent;
  transition: all 0.2s ease;
}

.picker-thumbnails img.thumb:hover {
  transform: scale(1.08);
  border-color: rgba(255, 255, 255, 0.4);
}

.picker-thumbnails img.thumb.active {
  border-color: var(--primary);
  box-shadow: 0 0 10px rgba(99, 102, 241, 0.5);
}

/* Form Controls */
.form-group {
  margin-bottom: 20px;
}

.form-group label {
  display: block;
  font-size: 13px;
  font-weight: 600;
  color: var(--text-muted);
  margin-bottom: 8px;
}

.label-with-action {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 8px;
}

.label-with-action label {
  margin-bottom: 0;
}

.form-group label i {
  margin-right: 4px;
}

input[type="text"],
input[type="number"],
textarea,
select,
.form-select {
  width: 100%;
  background: rgba(10, 12, 16, 0.6);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  padding: 12px 14px;
  color: var(--text-main);
  font-family: var(--font-sans);
  font-size: 14px;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

input:focus, textarea:focus, select:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.2);
}

.form-row {
  display: flex;
  gap: 16px;
}

.form-row .col {
  flex: 1;
}

/* Collapsible CSS Body */
.collapsible-group {
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  overflow: hidden;
}

.btn-toggle-collapse {
  width: 100%;
  padding: 12px 14px;
  background: rgba(255, 255, 255, 0.03);
  border: none;
  color: var(--text-muted);
  font-size: 13px;
  font-weight: 600;
  display: flex;
  justify-content: space-between;
  align-items: center;
  cursor: pointer;
}

.collapse-body {
  padding: 12px;
  background: rgba(0, 0, 0, 0.4);
}

.hidden {
  display: none !important;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 20px;
  border-radius: var(--radius-sm);
  font-size: 14px;
  font-weight: 700;
  cursor: pointer;
  border: none;
  transition: all 0.2s ease;
  text-decoration: none;
}

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

.btn-primary:hover {
  background: var(--primary-hover);
  box-shadow: 0 4px 15px rgba(99, 102, 241, 0.4);
}

.btn-accent {
  background: linear-gradient(135deg, var(--accent), #f43f5e);
  color: #fff;
}

.btn-accent:hover {
  box-shadow: 0 4px 15px rgba(236, 72, 153, 0.4);
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.08);
  color: var(--text-main);
  border: 1px solid var(--border-color);
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.15);
}

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

.btn-success:hover {
  background: #059669;
}

.btn-block {
  width: 100%;
}

.btn-lg {
  padding: 14px 24px;
  font-size: 15px;
}

.glow-effect {
  position: relative;
  box-shadow: 0 0 20px rgba(99, 102, 241, 0.5);
}

/* Preview Header & Stage */
.preview-card-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 16px;
}

.preview-mode-switch {
  display: flex;
  background: rgba(0, 0, 0, 0.4);
  padding: 3px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-color);
}

.mode-btn {
  background: transparent;
  border: none;
  color: var(--text-muted);
  padding: 6px 12px;
  border-radius: 6px;
  font-size: 12px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s ease;
}

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

.preview-stage {
  background: #050608;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  min-height: 520px;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
}

/* Live Canvas Wrapper */
.live-canvas-wrapper {
  position: relative;
  width: 100%;
  height: 520px;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
}

.live-bg-img {
  position: absolute;
  inset: 0;
  background-size: cover;
  background-position: center;
  transition: background-image 0.3s ease;
}

.live-html-container {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  overflow: hidden;
}

.spinner {
  width: 48px;
  height: 48px;
  border: 4px solid rgba(99, 102, 241, 0.2);
  border-top-color: var(--primary);
  border-radius: 50%;
  animation: spin 1s linear infinite;
  margin: 0 auto 16px auto;
}

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

.result-state {
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 10px;
}

.result-state img {
  max-width: 100%;
  max-height: 520px;
  border-radius: 8px;
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.6);
  object-fit: contain;
}

.result-actions {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: 20px;
  padding-top: 16px;
  border-top: 1px solid var(--border-color);
}

.tag {
  font-size: 11px;
  font-weight: 700;
  padding: 4px 10px;
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.1);
  color: var(--text-muted);
}

.tag-accent {
  background: rgba(99, 102, 241, 0.2);
  color: var(--primary);
}

/* Templates Library Grid */
.templates-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 24px;
}

.templates-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 24px;
}

.tpl-item-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 24px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: transform 0.2s ease, border-color 0.2s ease;
}

.tpl-item-card:hover {
  transform: translateY(-4px);
  border-color: var(--border-accent);
}

.tpl-item-head {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 12px;
}

.tpl-item-head h4 {
  font-size: 18px;
  font-weight: 700;
}

.tpl-type-key {
  font-size: 11px;
  font-family: var(--font-mono);
  background: rgba(99, 102, 241, 0.15);
  color: var(--primary);
  padding: 4px 8px;
  border-radius: 4px;
}

.tpl-desc {
  font-size: 13px;
  color: var(--text-muted);
  margin-bottom: 20px;
  line-height: 1.5;
}

.tpl-card-actions {
  display: flex;
  gap: 8px;
}

/* Modal */
.modal-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.75);
  backdrop-filter: blur(10px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 100;
}

.modal-content {
  width: 90%;
  max-width: 900px;
  max-height: 90vh;
  overflow-y: auto;
}

.modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 20px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--border-color);
}

.code-editors-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.code-label span {
  font-size: 11px;
  color: var(--primary);
  margin-left: 8px;
}

.code-font {
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.5;
}

.modal-footer {
  display: flex;
  justify-content: flex-end;
  gap: 12px;
  margin-top: 20px;
  padding-top: 16px;
  border-top: 1px solid var(--border-color);
}

/* AI Generator & Editor Layout */
.ai-gen-wrapper, .ai-editor-wrapper {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
}

.ai-gen-result, .ai-editor-result {
  background: #050608;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 440px;
  position: relative;
  padding: 16px;
}

.ai-result-display {
  display: flex;
  flex-direction: column;
  align-items: center;
  width: 100%;
}

.ai-result-display img {
  max-width: 100%;
  max-height: 420px;
  border-radius: 8px;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
  object-fit: contain;
}

.source-preview-box {
  margin-bottom: 20px;
  background: rgba(10, 12, 16, 0.5);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  padding: 12px;
}

.preview-label {
  display: block;
  font-size: 12px;
  font-weight: 600;
  color: var(--text-muted);
  margin-bottom: 8px;
}

.source-img-wrapper {
  width: 100%;
  height: 180px;
  border-radius: 6px;
  overflow: hidden;
  background: #000;
  display: flex;
  align-items: center;
  justify-content: center;
}

.source-img-wrapper img {
  max-width: 100%;
  max-height: 180px;
  object-fit: contain;
}

.ai-smart-actions {
  display: flex;
  gap: 12px;
  margin-top: 16px;
  width: 100%;
  justify-content: center;
}

.range-val {
  display: inline-block;
  font-size: 12px;
  color: var(--primary);
  margin-top: 6px;
}

/* History Table */
.table-responsive {
  overflow-x: auto;
}

.data-table {
  width: 100%;
  border-collapse: collapse;
  margin-top: 16px;
  font-size: 13px;
}

.data-table th, .data-table td {
  padding: 12px 16px;
  text-align: left;
  border-bottom: 1px solid var(--border-color);
}

.data-table th {
  color: var(--text-muted);
  font-weight: 600;
  background: rgba(255, 255, 255, 0.02);
}