:root{--color-primary-50: #fef1ec;--color-primary-100: #fde3da;--color-primary-200: #fac2b1;--color-primary-300: #f69b80;--color-primary-400: #f27353;--color-primary-500: #ee4d2d;--color-primary-600: #c93a17;--color-primary-700: #a52f12;--color-primary-800: #7f240e;--color-primary-900: #5c1a0a;--color-primary: var(--color-primary-500);--color-primary-strong: var(--color-primary-600);--color-primary-strong-hover: var(--color-primary-700);--color-on-primary: #ffffff;--color-neutral-0: #ffffff;--color-neutral-50: #fafaf9;--color-neutral-100: #f5f5f4;--color-neutral-200: #e7e5e4;--color-neutral-300: #d6d3d1;--color-neutral-400: #a8a29e;--color-neutral-500: #78716c;--color-neutral-600: #57534e;--color-neutral-700: #44403c;--color-neutral-800: #292524;--color-neutral-900: #1c1917;--color-success: #16803d;--color-success-bg: #ecfdf3;--color-success-border: #a6e9c0;--color-success-text: #14532d;--color-warning: #a16207;--color-warning-bg: #fffbeb;--color-warning-border: #fde68a;--color-warning-text: #713f12;--color-danger: #dc2626;--color-danger-bg: #fef2f2;--color-danger-border: #fecaca;--color-danger-text: #991b1b;--color-danger-strong: #b91c1c;--color-info: #0369a1;--color-info-bg: #f0f9ff;--color-info-border: #bae6fd;--color-info-text: #075985;--color-bg: #f7f6f4;--color-surface: var(--color-neutral-0);--color-surface-sunken: var(--color-neutral-100);--color-text: var(--color-neutral-900);--color-text-muted: var(--color-neutral-600);--color-text-subtle: var(--color-neutral-500);--color-text-inverse: var(--color-neutral-0);--color-border: var(--color-neutral-200);--color-border-strong: var(--color-neutral-300);--color-overlay: rgba(28, 25, 23, .55);--focus-ring-color: var(--color-primary-500);--focus-ring: 2px solid var(--focus-ring-color);--focus-ring-offset: 2px;--space-1: .25rem;--space-2: .5rem;--space-3: .75rem;--space-4: 1rem;--space-5: 1.25rem;--space-6: 1.5rem;--space-8: 2rem;--space-10: 2.5rem;--space-12: 3rem;--space-16: 4rem;--radius-sm: 6px;--radius-md: 10px;--radius-lg: 14px;--radius-full: 999px;--shadow-sm: 0 1px 2px rgba(28, 25, 23, .06);--shadow-md: 0 2px 8px rgba(28, 25, 23, .07), 0 1px 2px rgba(28, 25, 23, .05);--shadow-lg: 0 12px 32px rgba(28, 25, 23, .14), 0 2px 8px rgba(28, 25, 23, .08);--font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans", sans-serif, "Apple Color Emoji", "Segoe UI Emoji";--font-mono: ui-monospace, SFMono-Regular, Menlo, Consolas, "Liberation Mono", monospace;--text-xs: .75rem;--text-sm: .8125rem;--text-md: .9375rem;--text-lg: 1.0625rem;--text-xl: 1.25rem;--text-2xl: 1.5rem;--text-3xl: 1.875rem;--leading-tight: 1.25;--leading-normal: 1.5;--leading-relaxed: 1.65;--font-regular: 400;--font-medium: 500;--font-semibold: 600;--font-bold: 700;--transition-fast: .12s ease;--transition-base: .18s ease;--z-sidebar: 40;--z-modal: 50}.page{display:flex;flex-direction:column;gap:var(--space-6)}.page>.bk-page-header{margin-bottom:0}.page 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p{font-size:var(--text-sm);color:var(--color-text-muted);margin-top:2px}.product-summary-img{flex:none;width:72px;height:72px;object-fit:cover;border-radius:var(--radius-md);background-color:var(--color-surface-sunken)}.sell-mode-toggle{display:flex;flex-direction:column;gap:var(--space-2)}.sell-mode-description{font-size:var(--text-sm);color:var(--color-text-muted);max-width:60ch}.manual-product-form{padding-top:var(--space-4);border-top:1px solid var(--color-border)}.manual-product-form h3{font-size:var(--text-md)}.manual-product-form h3+p{margin-top:calc(-1 * 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var(--space-2);word-break:break-all}.api-key-status{display:flex;flex-wrap:wrap;gap:var(--space-2)}.settings-meta{font-size:var(--text-sm);color:var(--color-text-subtle)}.add-model-form h3{font-size:var(--text-lg)}@media (max-width: 640px){.generation-grid,.caption-list,.hook-grid{grid-template-columns:1fr}.step-actions 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reduce){*,*:before,*:after{animation-duration:.01ms!important;animation-iteration-count:1!important;transition-duration:.01ms!important}}.bk-app-shell{min-height:100vh;background-color:var(--color-bg)}.bk-app-shell__topbar{position:sticky;top:0;z-index:calc(var(--z-sidebar) - 1);display:flex;align-items:center;gap:var(--space-3);height:56px;padding:0 var(--space-4);background-color:var(--color-surface);border-bottom:1px solid var(--color-border)}.bk-app-shell__menu-button{display:none;align-items:center;justify-content:center;width:40px;height:40px;border:none;border-radius:var(--radius-md);background:transparent;color:var(--color-text);cursor:pointer}.bk-app-shell__menu-button:hover{background-color:var(--color-neutral-100)}.bk-app-shell__topbar-brand{display:none;font-weight:var(--font-bold);min-width:0}.bk-app-shell__topbar-slot{margin-left:auto;display:flex;align-items:center;gap:var(--space-3)}.bk-app-shell__sidebar{position:fixed;top:0;left:0;bottom:0;z-index:var(--z-sidebar);width:248px;background-color:var(--color-surface);border-right:1px solid var(--color-border);padding:var(--space-4);display:flex;flex-direction:column;gap:var(--space-6);overflow-y:auto}.bk-app-shell__brand{font-size:var(--text-lg);font-weight:var(--font-bold);color:var(--color-text);padding:var(--space-2) var(--space-3)}.bk-app-shell__nav-list{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:var(--space-1)}.bk-app-shell__nav-link{display:flex;align-items:center;gap:var(--space-3);padding:var(--space-2) var(--space-3);border-radius:var(--radius-md);text-decoration:none;color:var(--color-text-muted);font-weight:var(--font-medium);font-size:var(--text-md);transition:background-color var(--transition-fast),color var(--transition-fast)}.bk-app-shell__nav-link:hover{background-color:var(--color-neutral-100);color:var(--color-text)}.bk-app-shell__nav-link--active{background-color:var(--color-primary-50);color:var(--color-primary-700);font-weight:var(--font-semibold);box-shadow:inset 3px 0 0 var(--color-primary-500)}.bk-app-shell__nav-icon{display:inline-flex;flex:none;width:20px;justify-content:center}.bk-app-shell__scrim{display:none}.bk-app-shell__main{margin-left:248px;padding:var(--space-8);max-width:1200px}@media (max-width: 900px){.bk-app-shell__menu-button{display:inline-flex}.bk-app-shell__topbar-brand{display:block}.bk-app-shell__sidebar{transform:translate(-100%);transition:transform var(--transition-base);box-shadow:none}.bk-app-shell__sidebar--open{transform:translate(0);box-shadow:var(--shadow-lg)}.bk-app-shell__scrim{display:block;position:fixed;top:0;right:0;bottom:0;left:0;z-index:calc(var(--z-sidebar) - 1);background-color:var(--color-overlay)}.bk-app-shell__main{margin-left:0;padding:var(--space-4)}}.bk-button{display:inline-flex;align-items:center;justify-content:center;gap:var(--space-2);border:1px solid transparent;border-radius:var(--radius-md);font-weight:var(--font-semibold);cursor:pointer;white-space:nowrap;transition:background-color var(--transition-fast),border-color var(--transition-fast),color var(--transition-fast),box-shadow var(--transition-fast)}.bk-button:disabled{cursor:not-allowed;opacity:.55}.bk-button--sm{font-size:var(--text-sm);padding:var(--space-1) var(--space-3);min-height:32px}.bk-button--md{font-size:var(--text-md);padding:var(--space-2) var(--space-5);min-height:40px}.bk-button--primary{background-color:var(--color-primary-strong);color:var(--color-on-primary)}.bk-button--primary:hover:not(:disabled){background-color:var(--color-primary-strong-hover)}.bk-button--secondary{background-color:var(--color-surface);color:var(--color-text);border-color:var(--color-border-strong);box-shadow:var(--shadow-sm)}.bk-button--secondary:hover:not(:disabled){background-color:var(--color-neutral-50);border-color:var(--color-neutral-400)}.bk-button--danger{background-color:var(--color-danger);color:var(--color-text-inverse)}.bk-button--danger:hover:not(:disabled){background-color:var(--color-danger-strong)}.bk-button--ghost{background-color:transparent;color:var(--color-text-muted)}.bk-button--ghost:hover:not(:disabled){background-color:var(--color-neutral-100);color:var(--color-text)}.bk-button__spinner{width:1em;height:1em;flex:none;border-radius:var(--radius-full);border:2px solid currentColor;border-right-color:transparent;animation:bk-button-spin .7s linear infinite}@keyframes bk-button-spin{to{transform:rotate(360deg)}}.bk-alert{display:flex;gap:var(--space-3);padding:var(--space-3) var(--space-4);border:1px 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var(--transition-fast),box-shadow var(--transition-fast)}.bk-field__control::placeholder{color:var(--color-text-subtle)}.bk-field__control:hover:not(:disabled){border-color:var(--color-neutral-400)}.bk-field__control:focus{outline:none;border-color:var(--color-primary-500);box-shadow:0 0 0 3px var(--color-primary-100)}.bk-field__control:disabled{background-color:var(--color-surface-sunken);color:var(--color-text-subtle);cursor:not-allowed}.bk-field__control--error{border-color:var(--color-danger)}.bk-field__control--error:focus{border-color:var(--color-danger);box-shadow:0 0 0 3px 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var(--space-6);gap:var(--space-2)}.bk-empty-state__icon{color:var(--color-neutral-400);margin-bottom:var(--space-2)}.bk-empty-state__title{font-size:var(--text-lg);font-weight:var(--font-semibold);color:var(--color-text)}.bk-empty-state__description{font-size:var(--text-md);color:var(--color-text-muted);max-width:40ch}.bk-empty-state__action{margin-top:var(--space-4)}.bk-page-header{display:flex;align-items:flex-start;justify-content:space-between;gap:var(--space-4);flex-wrap:wrap;margin-bottom:var(--space-8)}.bk-page-header__title{font-size:var(--text-2xl);font-weight:var(--font-bold);color:var(--color-text)}.bk-page-header__description{margin-top:var(--space-1);font-size:var(--text-md);color:var(--color-text-muted);max-width:60ch}.bk-page-header__actions{display:flex;gap:var(--space-3);flex:none}@media (max-width: 640px){.bk-page-header{margin-bottom:var(--space-6)}.bk-page-header__title{font-size:var(--text-xl)}}.bk-checkbox{display:flex;flex-direction:column;gap:var(--space-1)}.bk-checkbox__row{display:flex;align-items:flex-start;gap:var(--space-2)}.bk-checkbox__input{width:18px;height:18px;margin-top:2px;flex:none;accent-color:var(--color-primary-strong);cursor:pointer}.bk-checkbox__input:disabled{cursor:not-allowed}.bk-checkbox__label{font-size:var(--text-md);color:var(--color-text);cursor:pointer}.bk-checkbox__input:disabled+.bk-checkbox__label{color:var(--color-text-subtle);cursor:not-allowed}.bk-checkbox__hint{font-size:var(--text-sm);color:var(--color-text-muted);padding-left:calc(18px + var(--space-2))}.bk-checkbox__error{font-size:var(--text-sm);color:var(--color-danger-text);font-weight:var(--font-medium);padding-left:calc(18px + var(--space-2))}.bk-hook-chip{-webkit-appearance:none;-moz-appearance:none;appearance:none;display:inline-flex;align-items:flex-start;gap:var(--space-2);padding:var(--space-2) var(--space-4) var(--space-2) var(--space-3);border:1.5px solid var(--color-border-strong);border-radius:var(--radius-full);background-color:var(--color-surface);color:var(--color-text);text-align:left;cursor:pointer;transition:border-color var(--transition-fast),background-color var(--transition-fast),box-shadow var(--transition-fast)}.bk-hook-chip:hover:not(:disabled){border-color:var(--color-primary-300);background-color:var(--color-primary-50)}.bk-hook-chip:disabled{cursor:not-allowed;opacity:.55}.bk-hook-chip--selected{border-color:var(--color-primary-500);background-color:var(--color-primary-50);box-shadow:var(--shadow-sm)}.bk-hook-chip__check{flex:none;width:18px;height:18px;margin-top:1px;display:inline-flex;align-items:center;justify-content:center;border-radius:var(--radius-full);border:1.5px solid var(--color-border-strong);background-color:var(--color-surface);color:var(--color-on-primary);transition:background-color var(--transition-fast),border-color var(--transition-fast)}.bk-hook-chip--selected .bk-hook-chip__check{background-color:var(--color-primary-strong);border-color:var(--color-primary-strong)}.bk-hook-chip__text{display:flex;flex-direction:column;gap:1px;min-width:0}.bk-hook-chip__label{font-size:var(--text-sm);font-weight:var(--font-semibold);line-height:var(--leading-normal)}.bk-hook-chip--selected .bk-hook-chip__label{color:var(--color-primary-700)}.bk-hook-chip__description{font-size:var(--text-xs);color:var(--color-text-muted);line-height:var(--leading-normal)}.bk-progress-steps__list{display:flex;align-items:flex-start;list-style:none;margin:0;padding:0;gap:var(--space-2)}.bk-progress-steps__step{display:flex;align-items:center;gap:var(--space-2);flex:1;min-width:0;font-size:var(--text-sm);color:var(--color-text-subtle)}.bk-progress-steps__step:last-child{flex:none}.bk-progress-steps__marker{flex:none;width:26px;height:26px;display:inline-flex;align-items:center;justify-content:center;border-radius:var(--radius-full);border:1.5px solid var(--color-border-strong);background-color:var(--color-surface);color:var(--color-text-muted);font-size:var(--text-xs);font-weight:var(--font-semibold)}.bk-progress-steps__step--done .bk-progress-steps__marker{background-color:var(--color-primary-strong);border-color:var(--color-primary-strong);color:var(--color-on-primary)}.bk-progress-steps__step--current .bk-progress-steps__marker{border-color:var(--color-primary-500);color:var(--color-primary-700);box-shadow:0 0 0 3px var(--color-primary-100)}.bk-progress-steps__step--current{color:var(--color-text)}.bk-progress-steps__step--current .bk-progress-steps__label{font-weight:var(--font-semibold)}.bk-progress-steps__step--done{color:var(--color-text-muted)}.bk-progress-steps__label{white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.bk-progress-steps__connector{flex:1;height:1.5px;min-width:var(--space-4);background-color:var(--color-border-strong)}.bk-progress-steps__step--done .bk-progress-steps__connector{background-color:var(--color-primary-300)}@media (max-width: 640px){.bk-progress-steps__step:not(.bk-progress-steps__step--current) .bk-progress-steps__label{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}}.bk-toggle{-webkit-appearance:none;-moz-appearance:none;appearance:none;display:inline-flex;align-items:center;gap:var(--space-2);border:none;background:transparent;padding:var(--space-1);border-radius:var(--radius-sm);cursor:pointer;font-size:var(--text-md);color:var(--color-text)}.bk-toggle:disabled{cursor:not-allowed;opacity:.55}.bk-toggle__track{flex:none;width:40px;height:22px;border-radius:var(--radius-full);background-color:var(--color-neutral-300);padding:2px;transition:background-color var(--transition-base)}.bk-toggle--on .bk-toggle__track{background-color:var(--color-primary-strong)}.bk-toggle__thumb{display:block;width:18px;height:18px;border-radius:var(--radius-full);background-color:var(--color-neutral-0);box-shadow:var(--shadow-sm);transition:transform var(--transition-base)}.bk-toggle--on .bk-toggle__thumb{transform:translate(18px)}.bk-copy-button__text{display:inline-flex;align-items:center}.bk-video-player{border-radius:var(--radius-lg);overflow:hidden;background-color:var(--color-neutral-900);box-shadow:var(--shadow-md)}.bk-video-player__video{width:100%;height:auto;display:block}.bk-table-wrap{width:100%;overflow-x:auto;border:1px solid var(--color-border);border-radius:var(--radius-lg);background-color:var(--color-surface)}.bk-table{width:100%;border-collapse:collapse;font-size:var(--text-sm)}.bk-table th{text-align:left;font-weight:var(--font-semibold);color:var(--color-text-muted);font-size:var(--text-xs);text-transform:uppercase;letter-spacing:.04em;padding:var(--space-3) var(--space-4);background-color:var(--color-neutral-50);border-bottom:1px solid var(--color-border);white-space:nowrap}.bk-table td{padding:var(--space-3) var(--space-4);border-bottom:1px solid var(--color-border);color:var(--color-text);vertical-align:middle}.bk-table tbody tr:last-child td{border-bottom:none}.bk-table tbody tr:hover td{background-color:var(--color-neutral-50)}.bk-table__cell--right{text-align:right}.bk-table__cell--center{text-align:center}.bk-table__empty{text-align:center;color:var(--color-text-muted);padding:var(--space-8) var(--space-4)}.bk-tabs{display:flex;gap:var(--space-1);border-bottom:1px solid var(--color-border);overflow-x:auto}.bk-tabs__tab{-webkit-appearance:none;-moz-appearance:none;appearance:none;border:none;background:transparent;padding:var(--space-2) var(--space-4);margin-bottom:-1px;border-bottom:2px solid transparent;font-size:var(--text-md);font-weight:var(--font-medium);color:var(--color-text-muted);cursor:pointer;white-space:nowrap;transition:color var(--transition-fast),border-color var(--transition-fast)}.bk-tabs__tab:hover{color:var(--color-text)}.bk-tabs__tab--active{color:var(--color-primary-600);font-weight:var(--font-semibold);border-bottom-color:var(--color-primary-500)}.bk-stat-card{background-color:var(--color-surface);border:1px solid var(--color-border);border-radius:var(--radius-lg);box-shadow:var(--shadow-sm);padding:var(--space-5) var(--space-6);display:flex;flex-direction:column;gap:var(--space-1)}.bk-stat-card__label{font-size:var(--text-sm);font-weight:var(--font-medium);color:var(--color-text-muted)}.bk-stat-card__value{font-size:var(--text-2xl);font-weight:var(--font-bold);color:var(--color-text);line-height:var(--leading-tight)}.bk-stat-card__hint{font-size:var(--text-sm);color:var(--color-text-subtle)}.bk-modal__overlay{position:fixed;top:0;right:0;bottom:0;left:0;z-index:var(--z-modal);background-color:var(--color-overlay);display:flex;align-items:flex-start;justify-content:center;padding:var(--space-6) var(--space-4);overflow-y:auto}.bk-modal{width:100%;max-width:520px;margin:auto 0;background-color:var(--color-surface);border-radius:var(--radius-lg);box-shadow:var(--shadow-lg);animation:bk-modal-in .16s ease-out}.bk-modal__header{display:flex;align-items:center;justify-content:space-between;gap:var(--space-4);padding:var(--space-5) var(--space-6) 0}.bk-modal__title{font-size:var(--text-xl);font-weight:var(--font-semibold)}.bk-modal__close{flex:none;display:inline-flex;align-items:center;justify-content:center;width:32px;height:32px;border:none;border-radius:var(--radius-sm);background:transparent;color:var(--color-text-muted);cursor:pointer}.bk-modal__close:hover{background-color:var(--color-neutral-100);color:var(--color-text)}.bk-modal__body{padding:var(--space-4) var(--space-6) var(--space-6)}.bk-modal__footer{display:flex;justify-content:flex-end;gap:var(--space-3);padding:var(--space-4) var(--space-6);border-top:1px solid var(--color-border);background-color:var(--color-neutral-50);border-radius:0 0 var(--radius-lg) var(--radius-lg)}@keyframes bk-modal-in{0%{opacity:0;transform:translateY(8px) scale(.98)}to{opacity:1;transform:none}}@media (max-width: 640px){.bk-modal__header{padding:var(--space-4) var(--space-4) 0}.bk-modal__body{padding:var(--space-3) var(--space-4) var(--space-4)}.bk-modal__footer{padding:var(--space-3) var(--space-4)}}