:root{--color-primary: #6366f1;--color-primary-dark: #4f46e5;--color-accent: #8b5cf6;--color-bg: #f6f7fb;--color-surface: #ffffff;--color-border: #e4e7ee;--color-text: #1f2430;--color-text-muted: #5b6270;--color-success: #16a34a;--color-warning: #d97706;--color-danger: #dc2626;--color-info: #2563eb;--color-warning-bg: #fef3c7;--color-warning-text: #92400e;--color-warning-border: #fcd34d;--color-danger-bg: #fef2f2;--color-danger-border: #fecaca;--color-danger-text: #991b1b;--color-success-bg: #dcfce7;--color-success-text: #166534;--color-highlight-gradient: linear-gradient(180deg, #eef2ff 0%, #ffffff 40%);--color-violet-text: #6d28d9;--color-blue-text: #1d4ed8;--font-family: "Segoe UI", "Inter", -apple-system, BlinkMacSystemFont, "Helvetica Neue", Arial, sans-serif;--font-size-xs: .75rem;--font-size-sm: .875rem;--font-size-base: 1rem;--font-size-lg: 1.125rem;--font-size-xl: 1.5rem;--font-size-2xl: 2rem;--space-1: .25rem;--space-2: .5rem;--space-3: .75rem;--space-4: 1rem;--space-5: 1.5rem;--space-6: 2rem;--space-8: 3rem;--radius-sm: .375rem;--radius-md: .75rem;--radius-lg: 1rem;--shadow-sm: 0 1px 2px rgba(15, 23, 42, .06);--shadow-md: 0 6px 18px rgba(15, 23, 42, .08);--focus-ring: 0 0 0 3px rgba(99, 102, 241, .35);color-scheme:light}[data-theme=dark]{--color-primary: #818cf8;--color-primary-dark: #a5b4fc;--color-accent: #a78bfa;--color-bg: #0f1117;--color-surface: #1a1d26;--color-border: #2b3040;--color-text: #e6e8ee;--color-text-muted: #9aa1b4;--color-success: #4ade80;--color-warning: #fbbf24;--color-danger: #f87171;--color-info: #60a5fa;--color-warning-bg: rgba(251, 191, 36, .12);--color-warning-text: #fcd34d;--color-warning-border: rgba(251, 191, 36, .35);--color-danger-bg: rgba(248, 113, 113, .12);--color-danger-border: rgba(248, 113, 113, .35);--color-danger-text: #fca5a5;--color-success-bg: rgba(74, 222, 128, .12);--color-success-text: #86efac;--color-highlight-gradient: linear-gradient(180deg, rgba(99, 102, 241, .16) 0%, #1a1d26 40%);--color-violet-text: #c4b5fd;--color-blue-text: #93c5fd;--shadow-sm: 0 1px 2px rgba(0, 0, 0, .4);--shadow-md: 0 6px 18px rgba(0, 0, 0, .45);--focus-ring: 0 0 0 3px rgba(129, 140, 248, .4);color-scheme:dark}*{box-sizing:border-box}html{font-size:16px}body{margin:0;font-family:var(--font-family);background-color:var(--color-bg);color:var(--color-text);line-height:1.5;-webkit-font-smoothing:antialiased}h1,h2,h3,p{margin-top:0}h1{font-size:var(--font-size-2xl);line-height:1.2}h2{font-size:var(--font-size-xl);line-height:1.25}h3{font-size:var(--font-size-lg);line-height:1.3}a{color:var(--color-primary);text-decoration:none}a:hover{text-decoration:underline}button,input,select,textarea{font-family:inherit;font-size:var(--font-size-base)}:focus-visible{outline:none;box-shadow:var(--focus-ring)}.container{width:100%;max-width:960px;margin-inline:auto;padding-inline:var(--space-4)}.app-main{padding-block:var(--space-6)}@media (max-width: 640px){.container{padding-inline:var(--space-3)}.app-main{padding-block:var(--space-4)}}.app-header{background:var(--color-surface);border-bottom:1px solid var(--color-border);position:sticky;top:0;z-index:10}.app-header__inner{display:flex;align-items:center;justify-content:space-between;height:64px}.app-header__brand{display:inline-flex;align-items:center;gap:var(--space-2);font-size:var(--font-size-lg);font-weight:700;color:var(--color-text)}.app-header__brand:hover{text-decoration:none}.app-header__logo{display:inline-grid;place-items:center;width:34px;height:34px;border-radius:var(--radius-md);background:linear-gradient(135deg,var(--color-primary),var(--color-accent));color:#fff;font-size:var(--font-size-lg)}.app-header__right{display:flex;align-items:center;gap:var(--space-3)}.app-header__nav{display:flex;gap:var(--space-3)}.theme-toggle{display:inline-flex;align-items:center;justify-content:center;flex-shrink:0;width:38px;height:38px;border:1px solid var(--color-border);border-radius:var(--radius-sm);background:var(--color-surface);color:var(--color-text);font-size:var(--font-size-lg);line-height:1;cursor:pointer}.theme-toggle:hover{border-color:var(--color-primary)}.language-toggle{display:inline-flex;align-items:center;justify-content:center;flex-shrink:0;width:38px;height:38px;border:1px solid var(--color-border);border-radius:var(--radius-sm);background:var(--color-surface);color:var(--color-text);font-size:var(--font-size-lg);line-height:1;cursor:pointer}.language-toggle:hover{border-color:var(--color-primary)}.language-toggle:focus-visible,.theme-toggle:focus-visible{outline:2px solid var(--color-primary);outline-offset:2px}.logout-button{display:inline-flex;align-items:center;gap:var(--space-2);flex-shrink:0;padding:var(--space-2) var(--space-3);border-radius:var(--radius-sm);font-size:var(--font-size-sm);color:var(--color-text-muted)}.logout-button:hover:not(:disabled){color:var(--color-danger);border-color:var(--color-danger-border)}.logout-button__icon{font-size:var(--font-size-base);flex-shrink:0}.nav-link{display:inline-flex;align-items:center;gap:var(--space-2);padding:var(--space-2) var(--space-3);border-radius:var(--radius-sm);color:var(--color-text-muted);font-weight:600}.nav-link__icon{font-size:var(--font-size-base);flex-shrink:0}.nav-link:hover{color:var(--color-primary);text-decoration:none;background:#6366f114}.nav-link--active{color:var(--color-primary);background:#6366f11f}.page-intro{margin-bottom:var(--space-5)}.page-intro h1{margin-bottom:var(--space-2)}.page-intro p{color:var(--color-text-muted);margin-bottom:0}.mvp-warning{background:var(--color-warning-bg);color:var(--color-warning-text);border:1px solid var(--color-warning-border);border-radius:var(--radius-md);padding:var(--space-3) var(--space-4);margin-bottom:var(--space-5);font-size:var(--font-size-sm)}.generation-form{background:var(--color-surface);border:1px solid var(--color-border);border-radius:var(--radius-lg);padding:var(--space-6);box-shadow:var(--shadow-md);margin-bottom:var(--space-6);display:flex;flex-direction:column;gap:var(--space-5)}.form-field{display:flex;flex-direction:column;gap:var(--space-2);min-width:0}.form-label{font-weight:600;font-size:var(--font-size-sm)}.required{color:var(--color-danger)}input,select,textarea{width:100%;padding:var(--space-3);border:1px solid var(--color-border);border-radius:var(--radius-sm);background:var(--color-surface);color:var(--color-text)}textarea{resize:vertical;min-height:96px}input:focus-visible,select:focus-visible,textarea:focus-visible{outline:none;border-color:var(--color-primary);box-shadow:var(--focus-ring)}.field-meta{display:flex;justify-content:space-between;gap:var(--space-2);font-size:var(--font-size-xs)}.char-count{color:var(--color-text-muted);font-variant-numeric:tabular-nums}.field-help{color:var(--color-text-muted);font-size:var(--font-size-xs);margin:0}.field-error{color:var(--color-danger);font-size:var(--font-size-sm);margin:0}.photo-upload__input{padding:var(--space-2) 0;font-size:var(--font-size-sm)}.photo-upload__input::file-selector-button{padding:var(--space-2) var(--space-4);margin-right:var(--space-3);border:1px solid var(--color-border);border-radius:var(--radius-md);background:var(--color-surface);color:var(--color-text);font-weight:600;cursor:pointer}.photo-upload__input::file-selector-button:hover{border-color:var(--color-primary);color:var(--color-primary)}.photo-upload__preview{display:flex;align-items:center;gap:var(--space-4);padding:var(--space-3);border:1px solid var(--color-border);border-radius:var(--radius-md);background:var(--color-surface)}.photo-upload__thumb{width:96px;height:96px;object-fit:cover;border-radius:var(--radius-sm);border:1px solid var(--color-border);flex-shrink:0}.photo-upload__meta{display:flex;flex-direction:column;align-items:flex-start;gap:var(--space-2);min-width:0}.photo-upload__name{font-size:var(--font-size-sm);color:var(--color-text-muted);overflow-wrap:anywhere}.radio-group{display:flex;flex-wrap:wrap;gap:var(--space-2)}.radio-pill{position:relative}.radio-pill input{position:absolute;opacity:0;width:100%;height:100%;cursor:pointer}.radio-pill span{display:inline-block;padding:var(--space-2) var(--space-4);border:1px solid var(--color-border);border-radius:999px;font-size:var(--font-size-sm);font-weight:600;color:var(--color-text-muted);transition:all .15s ease}.radio-pill input:checked+span{background:#6366f11f;border-color:var(--color-primary);color:var(--color-primary)}.radio-pill input:focus-visible+span{box-shadow:var(--focus-ring)}.optional-fields{border-top:1px dashed var(--color-border);padding-top:var(--space-4)}.optional-fields__title{font-size:var(--font-size-base);color:var(--color-text-muted);margin-bottom:var(--space-3)}.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:var(--space-4)}.form-field--full{grid-column:1 / -1}.form-actions{display:flex;gap:var(--space-3);flex-wrap:wrap}.btn{display:inline-flex;align-items:center;justify-content:center;gap:var(--space-2);padding:var(--space-3) var(--space-5);border-radius:var(--radius-md);border:1px solid transparent;font-weight:600;cursor:pointer;transition:background .15s ease,border-color .15s ease,color .15s ease}.btn:disabled{opacity:.55;cursor:not-allowed}.btn--primary{background:linear-gradient(135deg,var(--color-primary),var(--color-accent));color:#fff}.btn--primary:hover:not(:disabled){background:linear-gradient(135deg,var(--color-primary-dark),var(--color-primary))}.btn--secondary{background:var(--color-surface);border-color:var(--color-border);color:var(--color-text)}.btn--secondary:hover:not(:disabled){border-color:var(--color-primary);color:var(--color-primary)}.btn--ghost{background:transparent;color:var(--color-primary)}.btn--ghost:hover:not(:disabled){background:#6366f114}.btn--danger{background:var(--color-surface);border-color:var(--color-danger-border);color:var(--color-danger)}.btn--danger:hover:not(:disabled){background:var(--color-danger-bg)}.loading-state{display:flex;flex-direction:column;align-items:center;gap:var(--space-3);padding:var(--space-8) var(--space-4);color:var(--color-text-muted)}.spinner{width:40px;height:40px;border:4px solid rgba(99,102,241,.2);border-top-color:var(--color-primary);border-radius:50%;animation:spin .8s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}.error-alert{background:var(--color-danger-bg);border:1px solid var(--color-danger-border);color:var(--color-danger-text);border-radius:var(--radius-md);padding:var(--space-4);margin-bottom:var(--space-5)}.error-alert p{margin:var(--space-2) 0 0}.empty-state{text-align:center;padding:var(--space-8) var(--space-4);color:var(--color-text-muted)}.empty-state__icon{font-size:2.5rem}.results{display:flex;flex-direction:column;gap:var(--space-5)}.results__toolbar{display:flex;gap:var(--space-3);flex-wrap:wrap}.result-section__title{margin-bottom:var(--space-3)}.result-card{background:var(--color-surface);border:1px solid var(--color-border);border-radius:var(--radius-lg);padding:var(--space-5);box-shadow:var(--shadow-sm)}.result-card--highlight{border:1px solid var(--color-primary);background:var(--color-highlight-gradient)}.result-card__header{display:flex;align-items:center;justify-content:space-between;gap:var(--space-3);margin-bottom:var(--space-3)}.result-card__header h2,.result-card__header h3{margin:0}.recommended-title{font-size:var(--font-size-xl);font-weight:700;line-height:1.25;margin-bottom:var(--space-2)}.variant-title{font-size:var(--font-size-lg);font-weight:600;margin-bottom:var(--space-2)}.title-meta{color:var(--color-text-muted);font-size:var(--font-size-sm);margin-bottom:var(--space-3)}.variants-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:var(--space-4)}.metrics{list-style:none;padding:0;margin:0 0 var(--space-4);display:flex;flex-wrap:wrap;gap:var(--space-2)}.metrics__item{display:inline-flex;align-items:center;gap:var(--space-1);padding:var(--space-1) var(--space-2);background:#6366f114;border-radius:var(--radius-sm);font-size:var(--font-size-xs)}.metrics__label{color:var(--color-text-muted)}.metrics__value{font-weight:700;font-variant-numeric:tabular-nums}.score-badge{display:inline-flex;align-items:center;padding:var(--space-1) var(--space-2);border-radius:999px;font-size:var(--font-size-xs);font-weight:700}.score-badge--good{background:var(--color-success-bg);color:var(--color-success-text)}.score-badge--medium{background:var(--color-warning-bg);color:var(--color-warning-text)}.score-badge--low{background:var(--color-danger-bg);color:var(--color-danger-text)}.copy-button{background:transparent;border:1px solid var(--color-border);border-radius:var(--radius-sm);padding:var(--space-1) var(--space-3);font-size:var(--font-size-sm);font-weight:600;color:var(--color-primary);cursor:pointer}.copy-button:hover{background:#6366f114;border-color:var(--color-primary)}.description-block{margin-bottom:var(--space-4)}.description-block:last-child{margin-bottom:0}.description-block__head{display:flex;align-items:center;justify-content:space-between;gap:var(--space-3)}.description-block__head h3{font-size:var(--font-size-base);margin-bottom:var(--space-2)}.prewrap{white-space:pre-wrap;word-break:break-word}.tag-group{margin-bottom:var(--space-3)}.tag-group__title{font-size:var(--font-size-sm);color:var(--color-text-muted);margin-bottom:var(--space-2)}.tag-list{display:flex;flex-wrap:wrap;gap:var(--space-2)}.tag-chip,.keyword-chip{display:inline-flex;align-items:center;padding:var(--space-1) var(--space-3);border-radius:999px;font-size:var(--font-size-sm);background:#8b5cf61f;color:var(--color-violet-text)}.keyword-chip{background:#2563eb1a;color:var(--color-blue-text)}.main-hook{font-size:var(--font-size-lg);font-weight:600;margin-bottom:var(--space-4)}.hook-alternative{display:flex;align-items:center;justify-content:space-between;gap:var(--space-3);padding:var(--space-2) 0;border-bottom:1px solid var(--color-border)}.hook-alternative:last-child{border-bottom:none}.pinned-comment{background:#6366f10f;border-radius:var(--radius-md);padding:var(--space-3) var(--space-4)}.call-to-action{font-size:var(--font-size-lg);font-weight:600;color:var(--color-primary-dark)}.analysis-list{display:grid;grid-template-columns:repeat(auto-fill,minmax(200px,1fr));gap:var(--space-3);margin:var(--space-4) 0}.analysis-list dt{font-size:var(--font-size-xs);color:var(--color-text-muted);text-transform:uppercase;letter-spacing:.03em}.analysis-list dd{margin:0;font-weight:600}.analysis-columns{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:var(--space-4)}.analysis-columns h3{font-size:var(--font-size-sm);color:var(--color-text-muted)}.analysis-columns ul{margin:0;padding-left:var(--space-4)}.ai-disclaimer{border-left:4px solid var(--color-accent);background:#8b5cf60f;border-radius:var(--radius-sm);padding:var(--space-3) var(--space-4);color:var(--color-text-muted);font-size:var(--font-size-sm)}.ai-disclaimer p{margin:0}.tips-list{margin:0;padding-left:var(--space-4);display:flex;flex-direction:column;gap:var(--space-2)}.emoji-chip{display:inline-flex;align-items:center;justify-content:center;min-width:2.5rem;height:2.5rem;padding:0 var(--space-2);border-radius:var(--radius-md);font-size:var(--font-size-lg);background:#ec48991a}.format-badge{display:inline-block;padding:var(--space-1) var(--space-3);border-radius:999px;font-size:var(--font-size-sm);font-weight:600;background:#8b5cf624;color:var(--color-violet-text)}.carousel-structure{margin-top:var(--space-4);border-top:1px solid var(--color-border);padding-top:var(--space-4)}.carousel-structure h3{font-size:var(--font-size-sm);color:var(--color-text-muted);margin-bottom:var(--space-3)}.carousel-slides{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:var(--space-3)}.carousel-slide{display:flex;gap:var(--space-3);padding:var(--space-3);border:1px solid var(--color-border);border-radius:var(--radius-md);background:#6366f10a}.carousel-slide__number{display:inline-flex;align-items:center;justify-content:center;flex-shrink:0;width:1.75rem;height:1.75rem;border-radius:50%;background:var(--color-primary);color:#fff;font-size:var(--font-size-sm);font-weight:600}.carousel-slide__body h4{margin:0 0 var(--space-1);font-size:var(--font-size-md)}.carousel-slide__body p{margin:0}.tabs{display:flex;gap:var(--space-2);margin-bottom:var(--space-5);border-bottom:1px solid var(--color-border)}.tab{padding:var(--space-2) var(--space-4);border:none;background:transparent;border-bottom:2px solid transparent;margin-bottom:-1px;color:var(--color-text-muted);font-weight:600;cursor:pointer}.tab:hover{color:var(--color-primary)}.tab--active{color:var(--color-primary);border-bottom-color:var(--color-primary)}.history-count{color:var(--color-text-muted);font-size:var(--font-size-sm);margin-bottom:var(--space-3)}.history-list{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:var(--space-3)}.history-item{display:flex;align-items:flex-start;justify-content:space-between;gap:var(--space-4);background:var(--color-surface);border:1px solid var(--color-border);border-radius:var(--radius-md);padding:var(--space-4);box-shadow:var(--shadow-sm)}.history-item__main{cursor:pointer;min-width:0;flex:1 1 auto;border-radius:var(--radius-sm)}.history-item__main:focus-visible{outline:2px solid var(--color-primary);outline-offset:2px}.history-item:hover{border-color:var(--color-primary)}.history-item__title{font-size:var(--font-size-base);margin-bottom:var(--space-1);color:var(--color-primary-dark)}.history-item__preview{color:var(--color-text-muted);font-size:var(--font-size-sm);margin-bottom:var(--space-2)}.history-item__meta{color:var(--color-text-muted);font-size:var(--font-size-xs);margin:0}.pagination{display:flex;align-items:center;justify-content:center;gap:var(--space-4);margin-top:var(--space-5)}.pagination__info{color:var(--color-text-muted);font-size:var(--font-size-sm)}.modal-backdrop{position:fixed;top:0;right:0;bottom:0;left:0;z-index:1000;background:#0f172a8c;display:flex;align-items:flex-start;justify-content:center;padding:var(--space-5);overflow-y:auto}.modal{background:var(--color-bg);border-radius:var(--radius-lg);box-shadow:var(--shadow-md);width:100%;max-width:860px;max-height:calc(100vh - 2 * var(--space-5));overflow-y:auto;padding:var(--space-5)}.modal__header{display:flex;align-items:flex-start;justify-content:space-between;gap:var(--space-4);margin-bottom:var(--space-4)}.modal__header h2{margin:0 0 var(--space-1)}.modal__meta{color:var(--color-text-muted);font-size:var(--font-size-sm);margin:0}.modal__close{flex-shrink:0;display:inline-flex;align-items:center;justify-content:center;width:2rem;height:2rem;border:1px solid var(--color-border);border-radius:var(--radius-sm);background:var(--color-surface);color:var(--color-text-muted);font-size:var(--font-size-base);line-height:1;cursor:pointer}.modal__close:hover{color:var(--color-text);border-color:var(--color-primary)}.modal__actions{display:flex;flex-wrap:wrap;gap:var(--space-3);margin-bottom:var(--space-4)}@media (max-width: 1024px){.app-header__inner{flex-wrap:wrap;gap:var(--space-2);height:auto;padding-block:var(--space-2)}.app-header__right{flex-wrap:wrap;gap:var(--space-2)}.app-header__nav{flex-wrap:wrap;gap:var(--space-1)}}@media (max-width: 640px){.app-header__inner{height:auto;padding-block:var(--space-2);flex-wrap:wrap;gap:var(--space-2)}.app-header__right{width:100%;justify-content:space-between}.app-header__nav{gap:var(--space-1)}.nav-link{flex-direction:column;gap:var(--space-1);padding:var(--space-1) var(--space-2);font-size:var(--font-size-xs)}.nav-link__icon{font-size:var(--font-size-lg)}.logout-button{padding:var(--space-2)}.logout-button span{display:none}.generation-form{padding:var(--space-4)}.form-grid{grid-template-columns:1fr}.result-card{padding:var(--space-4)}.history-item{flex-direction:column}.modal-backdrop{padding:0;align-items:stretch}.modal{max-height:100vh;border-radius:0}.results__toolbar .btn{flex:1 1 auto}}.auth-form{background:var(--color-surface);border:1px solid var(--color-border);border-radius:var(--radius-lg);padding:var(--space-6);box-shadow:var(--shadow-md);display:flex;flex-direction:column;gap:var(--space-5);max-width:440px}.auth-alt{margin:0;color:var(--color-text-muted);font-size:var(--font-size-sm)}.auth-alt a{color:var(--color-primary);font-weight:600}