/* ===== RESET & BASE ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --bg-dark: #0f0f13;
  --bg-panel: #17171f;
  --bg-card: #1e1e2a;
  --bg-card2: #23232f;
  --border: #2e2e3e;
  --accent: #ff4444;
  --accent2: #ff6b35;
  --accent-yt: #ff0000;
  --green: #00cc66;
  --blue: #4f8ef7;
  --purple: #a855f7;
  --yellow: #f5c518;
  --text-main: #f0f0f5;
  --text-sub: #9090a8;
  --text-muted: #5a5a72;
  --radius: 12px;
  --radius-sm: 8px;
  --shadow: 0 4px 24px rgba(0,0,0,0.4);
  --sidebar-width: 220px;
  --font: 'Noto Sans KR', 'Inter', sans-serif;
}

html, body {
  min-height: 100%;
  font-family: var(--font);
  background: var(--bg-dark);
  color: var(--text-main);
  overflow: auto;
}

/* ===== APP LAYOUT ===== */
.app-layout {
  display: flex;
  height: 100vh;
  height: 100dvh;
  min-height: 100dvh;
  overflow: hidden;
}

/* ===== SIDEBAR ===== */
.sidebar {
  width: var(--sidebar-width);
  min-width: var(--sidebar-width);
  background: var(--bg-panel);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  overflow-y: auto;
  overflow-x: hidden;
}

.sidebar-header {
  padding: 20px 16px 16px;
  border-bottom: 1px solid var(--border);
}

.logo-area {
  display: flex;
  align-items: center;
  gap: 10px;
}

.logo-icon {
  font-size: 24px;
  color: var(--accent-yt);
}

.logo-title {
  font-size: 15px;
  font-weight: 700;
  color: var(--text-main);
  line-height: 1.2;
}

.logo-sub {
  font-size: 11px;
  color: var(--text-sub);
}

.sidebar-nav {
  padding: 12px 8px;
  flex: 1;
}

.nav-section-label {
  font-size: 10px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--text-muted);
  padding: 8px 8px 4px;
}

.nav-btn {
  display: flex;
  align-items: center;
  gap: 8px;
  width: 100%;
  padding: 9px 10px;
  border-radius: var(--radius-sm);
  border: none;
  background: transparent;
  color: var(--text-sub);
  font-size: 13px;
  font-family: var(--font);
  font-weight: 400;
  cursor: pointer;
  transition: all 0.18s;
  text-align: left;
}

.nav-btn:hover {
  background: var(--bg-card);
  color: var(--text-main);
}

.nav-btn.active {
  background: linear-gradient(135deg, rgba(255,68,68,0.18), rgba(255,107,53,0.1));
  color: #ff7a5a;
  font-weight: 600;
}

.nav-btn i {
  width: 16px;
  font-size: 13px;
  flex-shrink: 0;
}

/* Sidebar Progress */
.sidebar-progress {
  padding: 12px 14px 16px;
  border-top: 1px solid var(--border);
}

.progress-label {
  font-size: 11px;
  color: var(--text-muted);
  margin-bottom: 8px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.progress-steps {
  display: flex;
  gap: 3px;
  flex-wrap: wrap;
}

.progress-dot {
  width: 20px;
  height: 5px;
  border-radius: 3px;
  background: var(--border);
  transition: background 0.3s;
}

.progress-dot.done {
  background: var(--green);
}

.progress-dot.active {
  background: var(--accent);
}

/* ===== MAIN CONTENT ===== */
.main-content {
  flex: 1;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  background: var(--bg-dark);
}

/* TOPBAR */
.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 24px;
  background: var(--bg-panel);
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
}

.topbar-left {
  display: flex;
  align-items: center;
  gap: 12px;
}

.topbar-title {
  font-size: 15px;
  font-weight: 700;
  color: var(--text-main);
}

.topbar-topic {
  font-size: 12px;
  color: var(--accent);
  background: rgba(255,68,68,0.1);
  padding: 3px 10px;
  border-radius: 20px;
  font-weight: 500;
}

.topbar-right {
  display: flex;
  align-items: center;
  gap: 10px;
}

.btn-icon {
  width: 34px;
  height: 34px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  background: var(--bg-card);
  color: var(--text-sub);
  cursor: pointer;
  font-size: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.18s;
}

.btn-icon:hover { background: var(--bg-card2); color: var(--text-main); }

.api-status {
  font-size: 12px;
  padding: 5px 12px;
  border-radius: 20px;
  font-weight: 500;
  display: flex;
  align-items: center;
  gap: 6px;
}

.api-status i { font-size: 8px; }

.api-status.offline {
  background: rgba(90,90,114,0.2);
  color: var(--text-muted);
}

.api-status.online {
  background: rgba(0,204,102,0.15);
  color: var(--green);
}

/* ===== STEP PANELS ===== */
.step-container {
  flex: 1;
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
  padding: 28px 32px;
  padding-bottom: 120px;
}

.step-panel {
  display: none;
  animation: fadeIn 0.25s ease;
  max-width: 860px;
  margin: 0 auto;
}

.step-panel.active { display: block; }

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}

.panel-intro {
  margin-bottom: 28px;
}

.panel-title {
  font-size: 22px;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 8px;
}

.panel-desc {
  font-size: 14px;
  color: var(--text-sub);
  line-height: 1.6;
}

/* ===== CATEGORY GRID ===== */
.category-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
}

.cat-btn {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 28px 16px;
  background: var(--bg-card);
  border: 1.5px solid var(--border);
  border-radius: var(--radius);
  cursor: pointer;
  transition: all 0.22s;
  font-family: var(--font);
}

.cat-btn:hover {
  border-color: var(--accent);
  background: var(--bg-card2);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(255,68,68,0.15);
}

.cat-btn.selected {
  border-color: var(--accent);
  background: linear-gradient(135deg, rgba(255,68,68,0.18), rgba(255,107,53,0.1));
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(255,68,68,0.22);
}

.cat-icon {
  font-size: 36px;
  line-height: 1;
}

.cat-name {
  font-size: 14px;
  font-weight: 600;
  color: var(--text-main);
}

.cat-check {
  position: absolute;
  top: 10px;
  right: 10px;
  width: 22px;
  height: 22px;
  border-radius: 50%;
  background: var(--accent);
  color: white;
  font-size: 11px;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transform: scale(0.5);
  transition: all 0.18s;
}

.cat-btn.selected .cat-check {
  opacity: 1;
  transform: scale(1);
}

.cat-btn {
  position: relative;
}

/* 카테고리 하단 푸터 */
.category-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-top: 20px;
  padding: 16px 20px;
  background: var(--bg-card);
  border: 1.5px solid var(--border);
  border-radius: var(--radius);
  flex-wrap: wrap;
}

.cat-selected-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  flex: 1;
  min-width: 0;
}

.cat-hint {
  font-size: 13px;
  color: var(--text-muted);
  font-style: italic;
}

.cat-tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 5px 12px;
  background: linear-gradient(135deg, rgba(255,68,68,0.18), rgba(255,107,53,0.1));
  border: 1px solid rgba(255,68,68,0.35);
  border-radius: 20px;
  font-size: 13px;
  font-weight: 600;
  color: #ff7a5a;
}

.cat-confirm-btn {
  flex-shrink: 0;
  opacity: 0.4;
  pointer-events: none;
  transition: opacity 0.2s;
}

.cat-confirm-btn:not([disabled]) {
  opacity: 1;
  pointer-events: auto;
}

/* ===== TOPIC ===== */
.topic-actions {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 18px;
  flex-wrap: wrap;
}

.custom-topic-row {
  display: flex;
  gap: 8px;
  flex: 1;
  min-width: 240px;
}

.inline-input {
  flex: 1;
  padding: 9px 14px;
  border-radius: var(--radius-sm);
  border: 1.5px solid var(--border);
  background: var(--bg-card);
  color: var(--text-main);
  font-size: 13px;
  font-family: var(--font);
  outline: none;
  transition: border-color 0.18s;
}

.inline-input:focus { border-color: var(--blue); }

.topic-list {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
}

.topic-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 11px 14px;
  background: var(--bg-card);
  border: 1.5px solid var(--border);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all 0.18s;
  text-align: left;
  font-family: var(--font);
  font-size: 13px;
  color: var(--text-main);
}

.topic-item:hover {
  border-color: var(--blue);
  background: var(--bg-card2);
}

.topic-num {
  font-size: 11px;
  font-weight: 700;
  color: var(--text-muted);
  min-width: 22px;
}

/* ===== BUTTONS ===== */
.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 11px 20px;
  background: linear-gradient(135deg, var(--accent), var(--accent2));
  color: white;
  border: none;
  border-radius: var(--radius-sm);
  font-size: 14px;
  font-weight: 600;
  font-family: var(--font);
  cursor: pointer;
  transition: all 0.18s;
}

.btn-primary:hover { opacity: 0.9; transform: translateY(-1px); }
.btn-primary:disabled { opacity: 0.5; cursor: not-allowed; transform: none; }

.btn-secondary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 11px 20px;
  background: var(--bg-card2);
  color: var(--text-sub);
  border: 1.5px solid var(--border);
  border-radius: var(--radius-sm);
  font-size: 14px;
  font-weight: 500;
  font-family: var(--font);
  cursor: pointer;
  transition: all 0.18s;
}

.btn-secondary:hover {
  background: var(--bg-card);
  color: var(--text-main);
  border-color: var(--text-sub);
}

.step-actions {
  display: flex;
  gap: 12px;
  margin-top: 24px;
  flex-wrap: wrap;
}

/* ===== EDITABLE AREA ===== */
.editable-wrap {
  background: var(--bg-card);
  border: 1.5px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
}

.big-editor {
  width: 100%;
  padding: 20px;
  background: transparent;
  color: var(--text-main);
  font-size: 14px;
  font-family: var(--font);
  line-height: 1.8;
  border: none;
  outline: none;
  resize: vertical;
  min-height: 200px;
}

.big-editor::placeholder { color: var(--text-muted); }

.char-count {
  padding: 8px 20px;
  font-size: 12px;
  color: var(--text-muted);
  border-top: 1px solid var(--border);
  text-align: right;
}

.outline-editor {
  padding: 20px;
  color: var(--text-main);
  font-size: 14px;
  line-height: 1.8;
  white-space: pre-wrap;
  outline: none;
  min-height: 200px;
}

.outline-editor:empty::before {
  content: attr(data-placeholder);
  color: var(--text-muted);
}

/* ===== TITLE LISTS ===== */
.title-list {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.title-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 16px;
  background: var(--bg-card);
  border: 1.5px solid var(--border);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all 0.18s;
  font-size: 14px;
  color: var(--text-main);
  font-family: var(--font);
  text-align: left;
}

.title-item:hover {
  border-color: var(--yellow);
  background: var(--bg-card2);
}
.title-item.selected {
  border-color: var(--green);
  background: rgba(0,204,102,0.12);
}
.title-item .title-num {
  font-size: 11px;
  font-weight: 700;
  color: var(--yellow);
  min-width: 24px;
}

.title-item .title-copied {
  margin-left: auto;
  font-size: 11px;
  color: var(--green);
  opacity: 0;
  transition: opacity 0.3s;
}

.title-item.copied .title-copied { opacity: 1; }

.shorts-title-list .title-item {
  font-size: 18px;
  font-weight: 700;
  padding: 16px 20px;
}



.selection-hint {
  margin-top: 10px;
  padding: 10px 12px;
  border: 1px dashed var(--border);
  border-radius: var(--radius-sm);
  font-size: 12px;
  color: var(--text-sub);
  line-height: 1.5;
}

/* ===== IMAGE IDEA LIST ===== */
.idea-list {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.idea-item {
  display: flex;
  gap: 12px;
  padding: 14px 16px;
  background: var(--bg-card);
  border: 1.5px solid var(--border);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all 0.18s;
  font-size: 13px;
  color: var(--text-main);
  line-height: 1.6;
  text-align: left;
}

.idea-item:hover {
  border-color: var(--purple);
  background: var(--bg-card2);
}

.idea-item.selected {
  border-color: var(--purple);
  background: rgba(168,85,247,0.12);
}

.idea-num {
  font-size: 11px;
  font-weight: 700;
  color: var(--purple);
  min-width: 24px;
  padding-top: 2px;
}

/* ===== THUMBNAIL LAUNCH ===== */
.thumb-launch-area {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
  margin-top: 10px;
}

.thumb-launch-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 12px;
  padding: 48px 24px;
  background: var(--bg-card);
  border: 2px solid var(--border);
  border-radius: var(--radius);
  cursor: pointer;
  transition: all 0.22s;
}

.thumb-launch-card:hover {
  border-color: var(--accent);
  background: var(--bg-card2);
  transform: translateY(-3px);
  box-shadow: 0 12px 32px rgba(255,68,68,0.2);
}

.thumb-launch-card i {
  font-size: 40px;
  color: var(--accent);
}

.thumb-launch-card.shorts-card i {
  color: var(--accent-yt);
}

.thumb-launch-card.shorts-card:hover {
  border-color: var(--accent-yt);
  box-shadow: 0 12px 32px rgba(255,0,0,0.2);
}

.thumb-launch-title {
  font-size: 18px;
  font-weight: 700;
  color: var(--text-main);
}

.thumb-launch-desc {
  font-size: 13px;
  color: var(--text-sub);
}

/* ===== LOADING STATE ===== */
.loading-state {
  padding: 40px;
  text-align: center;
  color: var(--text-sub);
  font-size: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
}

.section-label {
  display: block;
  padding: 12px 16px 4px;
  font-size: 12px;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

/* ===== MODAL ===== */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.75);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  backdrop-filter: blur(4px);
  padding: 20px;
}

.modal-overlay.hidden { display: none; }

.modal-box {
  background: var(--bg-panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  width: 100%;
  max-width: 520px;
  max-height: 90vh;
  overflow-y: auto;
  box-shadow: 0 24px 60px rgba(0,0,0,0.6);
}

.modal-wide {
  max-width: 820px;
}

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 24px;
  border-bottom: 1px solid var(--border);
}

.modal-header h2 {
  font-size: 16px;
  font-weight: 700;
  display: flex;
  align-items: center;
  gap: 8px;
}

.modal-header h2 i { color: var(--accent); }

.modal-close {
  width: 32px;
  height: 32px;
  border-radius: var(--radius-sm);
  border: none;
  background: var(--bg-card);
  color: var(--text-sub);
  cursor: pointer;
  font-size: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.18s;
}

.modal-close:hover { background: var(--bg-card2); color: var(--text-main); }

.modal-body {
  padding: 24px;
}

.modal-footer {
  padding: 16px 24px;
  border-top: 1px solid var(--border);
  display: flex;
  justify-content: flex-end;
}

/* Settings */
.setting-label {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  font-weight: 600;
  color: var(--text-main);
  margin-bottom: 8px;
}

.badge {
  font-size: 10px;
  padding: 2px 7px;
  border-radius: 10px;
  background: rgba(255,68,68,0.15);
  color: var(--accent);
  font-weight: 600;
}

.badge-img {
  background: rgba(79,142,247,0.15);
  color: var(--blue);
}

.input-row {
  display: flex;
  gap: 8px;
}

.setting-input {
  flex: 1;
  padding: 10px 14px;
  border-radius: var(--radius-sm);
  border: 1.5px solid var(--border);
  background: var(--bg-card);
  color: var(--text-main);
  font-size: 13px;
  font-family: var(--font);
  outline: none;
  transition: border-color 0.18s;
}

.setting-input:focus { border-color: var(--blue); }

.eye-btn {
  width: 40px;
  border-radius: var(--radius-sm);
  border: 1.5px solid var(--border);
  background: var(--bg-card);
  color: var(--text-sub);
  cursor: pointer;
  font-size: 14px;
  transition: all 0.18s;
}

.eye-btn:hover { background: var(--bg-card2); color: var(--text-main); }

.setting-hint {
  font-size: 12px;
  color: var(--text-muted);
  margin-top: 6px;
}

.setting-select {
  width: 100%;
  padding: 10px 14px;
  border-radius: var(--radius-sm);
  border: 1.5px solid var(--border);
  background: var(--bg-card);
  color: var(--text-main);
  font-size: 13px;
  font-family: var(--font);
  outline: none;
  cursor: pointer;
}

.btn-save {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 22px;
  background: linear-gradient(135deg, var(--blue), #6366f1);
  color: white;
  border: none;
  border-radius: var(--radius-sm);
  font-size: 14px;
  font-weight: 600;
  font-family: var(--font);
  cursor: pointer;
  transition: opacity 0.18s;
}

.btn-save:hover { opacity: 0.9; }

/* Gemini badge */
.setting-gemini-badge {
  display: flex;
  align-items: center;
  gap: 8px;
  background: linear-gradient(135deg, rgba(79,142,247,0.12), rgba(168,85,247,0.12));
  border: 1px solid rgba(79,142,247,0.3);
  border-radius: var(--radius-sm);
  padding: 10px 14px;
  font-size: 13px;
  color: #a0b8ff;
  margin-bottom: 20px;
  line-height: 1.5;
}
.setting-gemini-badge i { color: var(--blue); font-size: 14px; flex-shrink: 0; }

.setting-link {
  color: var(--blue);
  text-decoration: none;
  font-weight: 500;
}
.setting-link:hover { text-decoration: underline; }

.setting-model-row {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.setting-model-card {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 14px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
}

.model-card-icon {
  font-size: 18px;
  color: var(--blue);
  width: 28px;
  text-align: center;
  flex-shrink: 0;
}

.model-card-label {
  font-size: 11px;
  color: var(--text-muted);
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.4px;
  margin-bottom: 3px;
}

.model-card-value {
  font-size: 13px;
  color: var(--text-main);
  font-weight: 600;
  font-family: 'Inter', monospace;
}

/* ── 썸네일 스튜디오 카드 (인라인, 모달 아님) ── */
.studio-card {
  background: var(--bg-panel);
  border: 1.5px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  margin-bottom: 28px;
}

.studio-card-header {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 14px 20px;
  background: linear-gradient(135deg, rgba(255,68,68,0.12), rgba(255,107,53,0.06));
  border-bottom: 1px solid var(--border);
  font-size: 15px;
  font-weight: 700;
  color: var(--text-main);
}

.studio-card-header i {
  font-size: 18px;
  color: var(--accent);
}

.studio-card-header em {
  font-style: normal;
  font-size: 12px;
  font-weight: 500;
  color: var(--text-muted);
  background: var(--bg-card);
  padding: 2px 8px;
  border-radius: 10px;
  margin-left: 4px;
}

.studio-card-shorts .studio-card-header {
  background: linear-gradient(135deg, rgba(255,0,0,0.1), rgba(180,0,0,0.05));
}

.studio-card-shorts .studio-card-header i {
  color: var(--accent-yt);
}

.studio-card > .thumb-step-card {
  border: none;
  border-radius: 0;
  border-bottom: 1px solid var(--border);
  margin-bottom: 0;
}

.studio-card > .thumb-step-card:last-child {
  border-bottom: none;
}

/* ── 썸네일 단계 카드 ── */
.thumb-step-card {
  background: var(--bg-card);
  border: 1.5px solid var(--border);
  border-radius: var(--radius);
  padding: 16px 18px;
  margin-bottom: 12px;
  transition: opacity 0.25s, filter 0.25s;
}

.thumb-step-card.step-locked {
  opacity: 0.38;
  filter: grayscale(0.4);
  pointer-events: none;
  user-select: none;
}

.thumb-step-header {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 14px;
  flex-wrap: wrap;
}

.thumb-step-badge {
  width: 26px;
  height: 26px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--accent), var(--accent2));
  color: white;
  font-size: 12px;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.thumb-step-badge-shorts {
  background: linear-gradient(135deg, #ff0000, #cc0000);
}

.thumb-step-label {
  font-size: 14px;
  font-weight: 600;
  color: var(--text-main);
}

.thumb-step-label small {
  font-size: 11px;
  color: var(--text-muted);
  font-weight: 400;
  margin-left: 4px;
}

.thumb-step-hint {
  font-size: 11px;
  color: var(--text-muted);
  margin-left: auto;
  font-style: italic;
}

.thumb-step-row {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
  margin-top: 10px;
}

/* 텍스트 적용 버튼 */
.btn-apply-text {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 9px 16px;
  background: linear-gradient(135deg, #4f8ef7, #6366f1);
  color: white;
  border: none;
  border-radius: var(--radius-sm);
  font-size: 13px;
  font-weight: 600;
  font-family: var(--font);
  cursor: pointer;
  transition: opacity 0.18s;
  white-space: nowrap;
}
.btn-apply-text:hover { opacity: 0.88; }
.btn-apply-text.btn-apply-shorts {
  background: linear-gradient(135deg, #ff0000, #cc0000);
}

/* 캔버스 아래 액션 영역 */
.thumb-canvas-actions {
  display: flex;
  gap: 10px;
  justify-content: center;
  margin-top: 12px;
  flex-wrap: wrap;
}

/* ── 오버레이 힌트 ── */
.thumb-overlay-hint {
  font-size: 12px;
  color: var(--text-sub);
  background: var(--bg-card2);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 8px 12px;
  margin-bottom: 14px;
  line-height: 1.6;
}
.thumb-overlay-hint code {
  background: rgba(255,255,255,0.08);
  padding: 1px 5px;
  border-radius: 4px;
  font-size: 13px;
  color: var(--text-main);
}

/* ── 3열 오버레이 패널 ── */
.overlay-panels {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
}

@media (max-width: 860px) {
  .overlay-panels { grid-template-columns: 1fr; }
}

.overlay-panel {
  background: var(--bg-card2);
  border: 1.5px solid var(--border);
  border-radius: var(--radius);
  padding: 14px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.overlay-panel-header {
  font-size: 12px;
  font-weight: 700;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.8px;
  padding-bottom: 6px;
  border-bottom: 1px solid var(--border);
  margin-bottom: 2px;
}

.overlay-panel-header-shorts {
  color: var(--accent-yt);
}

.overlay-field {
  width: 100% !important;
  min-width: 0 !important;
  flex: none !important;
  font-size: 13px;
}

.overlay-panel-actions {
  display: flex;
  gap: 7px;
  margin-top: 2px;
}

.btn-apply-sm {
  padding: 7px 12px !important;
  font-size: 12px !important;
  flex: 1;
}

.btn-download-sm {
  padding: 7px 12px;
  font-size: 12px;
  flex: 1;
}

/* 오버레이 캔버스 미리보기 */
.overlay-canvas-wrap {
  margin-top: 8px;
  border-radius: var(--radius-sm);
  overflow: hidden;
  border: 1px solid var(--border);
}
.overlay-canvas-wrap canvas {
  width: 100%;
  height: auto;
  display: block;
  background: #000;
}
.overlay-canvas-wrap.hidden { display: none; }

.thumb-title {
  font-size: 15px;
  font-weight: 700;
  color: var(--text-main);
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 14px;
}

.thumb-config-row {
  display: flex;
  gap: 8px;
  margin-bottom: 10px;
  flex-wrap: wrap;
  align-items: center;
}

.thumb-input {
  flex: 1;
  min-width: 120px;
  padding: 9px 13px;
  border-radius: var(--radius-sm);
  border: 1.5px solid var(--border);
  background: var(--bg-card);
  color: var(--text-main);
  font-size: 13px;
  font-family: var(--font);
  outline: none;
}

.thumb-input:focus { border-color: var(--blue); }

.thumb-input-sm {
  width: 80px;
  padding: 9px 10px;
  border-radius: var(--radius-sm);
  border: 1.5px solid var(--border);
  background: var(--bg-card);
  color: var(--text-main);
  font-size: 13px;
  font-family: var(--font);
  outline: none;
}

.thumb-select {
  padding: 9px 13px;
  border-radius: var(--radius-sm);
  border: 1.5px solid var(--border);
  background: var(--bg-card);
  color: var(--text-main);
  font-size: 13px;
  font-family: var(--font);
  outline: none;
}

.color-label {
  font-size: 12px;
  color: var(--text-sub);
  white-space: nowrap;
}

.thumb-textarea {
  width: 100%;
  padding: 12px 14px;
  border-radius: var(--radius-sm);
  border: 1.5px solid var(--border);
  background: var(--bg-card);
  color: var(--text-main);
  font-size: 13px;
  font-family: var(--font);
  resize: vertical;
  outline: none;
  margin-bottom: 12px;
}

.thumb-textarea:focus { border-color: var(--blue); }

.btn-gen-thumb {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 20px;
  background: linear-gradient(135deg, var(--accent), var(--accent2));
  color: white;
  border: none;
  border-radius: var(--radius-sm);
  font-size: 13px;
  font-weight: 600;
  font-family: var(--font);
  cursor: pointer;
  transition: opacity 0.18s;
}

.btn-gen-thumb:hover { opacity: 0.9; }
.btn-gen-thumb:disabled { opacity: 0.5; cursor: not-allowed; }

.btn-gen-thumb.btn-shorts {
  background: linear-gradient(135deg, #ff0000, #cc0000);
}

.thumb-divider {
  border: none;
  border-top: 1px solid var(--border);
  margin: 24px 0;
}

.thumb-canvas-wrap {
  margin-top: 16px;
  text-align: center;
}

.thumb-canvas-wrap canvas {
  max-width: 100%;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
}

.btn-download {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 9px 18px;
  background: var(--bg-card2);
  color: var(--text-main);
  border: 1.5px solid var(--border);
  border-radius: var(--radius-sm);
  font-size: 13px;
  font-family: var(--font);
  cursor: pointer;
  margin-top: 12px;
  transition: all 0.18s;
}

.btn-download:hover { background: var(--bg-card); border-color: var(--green); color: var(--green); }

/* ===== TOAST ===== */
.toast {
  position: fixed;
  bottom: 28px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--bg-card2);
  border: 1px solid var(--border);
  color: var(--text-main);
  padding: 12px 24px;
  border-radius: 30px;
  font-size: 14px;
  font-weight: 500;
  box-shadow: var(--shadow);
  z-index: 9999;
  animation: toastIn 0.25s ease;
}

.toast.hidden { display: none; }
.toast.success { border-color: var(--green); color: var(--green); }
.toast.error { border-color: var(--accent); color: var(--accent); }

@keyframes toastIn {
  from { opacity: 0; transform: translateX(-50%) translateY(12px); }
  to { opacity: 1; transform: translateX(-50%) translateY(0); }
}

/* ===== SCROLLBAR ===== */
::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--border); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--text-muted); }

/* ===== RESPONSIVE ===== */
@media (max-width: 900px) {
  .sidebar { width: 54px; min-width: 54px; }
  .sidebar .logo-title, .sidebar .logo-sub,
  .sidebar .nav-btn span, .nav-section-label,
  .sidebar-progress { display: none; }
  .nav-btn { justify-content: center; padding: 12px; }
  .nav-btn i { width: auto; }
  .category-grid { grid-template-columns: repeat(2, 1fr); }
  .topic-list { grid-template-columns: 1fr; }
  .thumb-launch-area { grid-template-columns: 1fr; }
  .step-container { padding: 20px 16px; }
}

/* Generating animation */
.generating-overlay {
  position: relative;
  pointer-events: none;
}

.generating-overlay::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.04), transparent);
  animation: shimmer 1.5s infinite;
}

@keyframes shimmer {
  0% { transform: translateX(-100%); }
  100% { transform: translateX(100%); }
}