:root { color-scheme: light; }
.ai-studio-page { --brand: #e21413; --brand-dark: #c90f10; min-width: 320px; background: #fafafa; color: var(--text); }
.ai-topbar { position: sticky; top: 0; z-index: 10; display: flex; align-items: center; justify-content: space-between; height: 68px; padding: 0 clamp(22px, 5vw, 72px); border-bottom: 1px solid var(--border); background: rgba(255,255,255,.94); backdrop-filter: blur(14px); }
.ai-brand, .ai-back-link { display: inline-flex; align-items: center; gap: 10px; color: var(--text); font-size: 14px; font-weight: 700; }
.ai-brand > img { display: block; width: 72px; height: auto; }
.ai-back-link { color: var(--text-3); font-size: 13px; font-weight: 600; }.ai-back-link:hover { color: var(--brand); }.ai-back-link svg { width: 16px; }
.ai-main { width: min(1180px, calc(100% - 48px)); margin: 0 auto; padding: 72px 0 96px; }
.ai-intro { max-width: 760px; }.ai-intro h1 { margin: 8px 0 16px; font-size: clamp(40px, 5vw, 64px); line-height: 1; letter-spacing: -.055em; }.ai-intro h1 span { color: var(--brand); }.ai-intro p { margin: 0; color: var(--text-3); font-size: 17px; line-height: 1.8; }
.ai-prompt-card { margin-top: 38px; padding: 24px; border: 1px solid var(--border); border-radius: 14px; background: #fff; box-shadow: 0 12px 32px rgba(31,32,38,.05); }.ai-prompt-card > label { display: block; margin-bottom: 12px; font-size: 14px; font-weight: 800; }
.ai-input-row { display: grid; grid-template-columns: minmax(0,1fr) auto; gap: 12px; }.ai-input-row textarea { width: 100%; min-height: 56px; resize: vertical; padding: 16px; border: 1px solid var(--border); border-radius: 8px; outline: 0; color: var(--text); background: #fff; font: inherit; line-height: 1.5; }.ai-input-row textarea:focus { border-color: var(--brand); box-shadow: 0 0 0 3px rgba(230,24,23,.08); }.ai-generate-button { align-self: stretch; min-width: 132px; }.ai-generate-button svg { width: 17px; }.ai-generate-button.is-generating svg { animation: ai-spin 1s linear infinite; }
.ai-helper { display: flex; align-items: center; gap: 7px; margin: 12px 0 0; color: var(--text-4); font-size: 12px; }.ai-helper svg { width: 14px; color: var(--brand); }
.ai-flow-section, .ai-result-section, .ai-check-section { margin-top: 72px; }.ai-section-heading { display: flex; align-items: flex-end; justify-content: space-between; gap: 20px; margin-bottom: 24px; }.ai-section-heading h2 { margin: 3px 0 0; font-size: 27px; letter-spacing: -.035em; }.ai-section-heading > p { margin: 0; color: var(--text-4); font-size: 13px; }
.ai-flow { display: grid; grid-template-columns: repeat(5,minmax(0,1fr)); gap: 14px; margin: 0; padding: 0; list-style: none; }.ai-flow li { position: relative; min-height: 168px; padding: 20px; border: 1px solid var(--border); border-radius: 12px; background: #fff; }.ai-flow li:not(:last-child)::after { position: absolute; top: 48px; right: -16px; z-index: 2; width: 18px; height: 1px; background: #d8d8d8; content: ''; }.ai-flow-icon { display: grid; width: 40px; height: 40px; place-items: center; margin-bottom: 17px; border-radius: 8px; background: var(--brand-bg); color: var(--brand); }.ai-flow-icon svg { width: 20px; }.ai-flow strong, .ai-flow small { display: block; }.ai-flow strong { font-size: 15px; }.ai-flow small { margin-top: 8px; color: var(--text-3); font-size: 12px; line-height: 1.55; }
.ai-status { display: inline-flex; align-items: center; gap: 6px; color: #388e3c; font-size: 13px; font-weight: 700; }.ai-status svg, .ai-check-grid svg { width: 17px; }
.ai-result-grid { display: grid; grid-template-columns: minmax(0,1.7fr) minmax(250px,.7fr); gap: 18px; }.ai-preview-card, .ai-summary-card { overflow: hidden; border: 1px solid var(--border); border-radius: 12px; background: #fff; }.ai-preview-head { display: flex; align-items: center; justify-content: space-between; padding: 15px 18px; border-bottom: 1px solid var(--border); }.ai-preview-head span, .ai-preview-head small { display: block; }.ai-preview-head span { font-size: 14px; font-weight: 800; }.ai-preview-head small { margin-top: 4px; color: var(--text-4); font-size: 11px; }.ai-preview-head a { display: grid; width: 30px; height: 30px; place-items: center; border-radius: 6px; color: var(--text-3); background: #fafafa; }.ai-preview-head a:hover { color: var(--brand); background: var(--brand-bg); }.ai-preview-head svg { width: 17px; }
.ai-preview-frame { height: 460px; overflow: hidden; background: #f6f7f8; }.ai-preview-frame iframe { width: 1440px; height: 900px; border: 0; transform: scale(.5); transform-origin: top left; pointer-events: none; }
.ai-preview-card.is-clickable { cursor: pointer; transition: border-color .16s ease,box-shadow .16s ease,transform .16s ease; }.ai-preview-card.is-clickable:hover, .ai-preview-card.is-clickable:focus-visible { border-color: var(--brand); box-shadow: 0 12px 26px rgba(226,20,19,.10); outline: 0; transform: translateY(-2px); }
.ai-summary-card { padding: 26px; }.ai-summary-kicker { color: var(--brand); font-size: 10px; font-weight: 800; letter-spacing: .12em; }.ai-summary-card h3 { margin: 12px 0; font-size: 22px; letter-spacing: -.035em; }.ai-summary-card > p { margin: 0; color: var(--text-3); font-size: 13px; line-height: 1.75; }.ai-summary-card dl { display: grid; gap: 0; margin: 24px 0 0; }.ai-summary-card dl div { padding: 13px 0; border-top: 1px solid var(--border); }.ai-summary-card dt { color: var(--text-4); font-size: 11px; }.ai-summary-card dd { margin: 5px 0 0; font-size: 13px; font-weight: 700; }
.ai-validation-panel { display: grid; grid-template-columns: minmax(0,1fr) 246px; overflow: hidden; border: 1px solid var(--border); border-radius: 12px; background: #fff; }.ai-validation-list { display: grid; grid-template-columns: repeat(2,minmax(0,1fr)); }.ai-validation-item { display: grid; grid-template-columns: 20px minmax(0,1fr) auto; align-items: center; gap: 10px; min-height: 82px; padding: 16px 18px; border-right: 1px solid var(--border); border-bottom: 1px solid var(--border); }.ai-validation-item:nth-child(even) { border-right: 0; }.ai-validation-item:last-child { border-bottom: 0; }.ai-validation-item--wide { grid-column: 1 / -1; border-right: 0; }.ai-validation-item > svg { width: 19px; height: 19px; color: var(--brand); }.ai-validation-item strong, .ai-validation-item small { display: block; }.ai-validation-item strong { color: var(--text); font-size: 14px; line-height: 1.35; }.ai-validation-item small { margin-top: 4px; color: var(--text-4); font-size: 12px; line-height: 1.45; }.ai-validation-item em { color: var(--brand); font-size: 12px; font-style: normal; font-weight: 700; white-space: nowrap; }.ai-score-card { display: flex; min-height: 246px; flex-direction: column; justify-content: center; padding: 26px; border-left: 1px solid var(--border); background: linear-gradient(135deg,#fff 0%,var(--brand-bg) 100%); }.ai-score-card > span { color: var(--text-4); font-size: 13px; font-weight: 700; }.ai-score-card strong { margin-top: 7px; color: var(--brand); font-family: var(--font-num); font-size: 54px; letter-spacing: -2px; line-height: 1; }.ai-score-card strong small { margin-left: 4px; color: var(--text-4); font-family: var(--font-sans); font-size: 14px; letter-spacing: 0; }.ai-score-card p { margin: 8px 0 18px; color: var(--text); font-size: 12px; font-weight: 800; letter-spacing: .08em; text-transform: uppercase; }.ai-score-bar { height: 5px; overflow: hidden; border-radius: 999px; background: #f7d8d8; }.ai-score-bar i { display: block; width: 98%; height: 100%; border-radius: inherit; background: var(--brand); }
.ai-toast { position: fixed; right: 24px; bottom: 24px; z-index: 20; padding: 13px 16px; border-radius: 8px; background: #27282d; color: #fff; font-size: 13px; box-shadow: 0 14px 32px rgba(0,0,0,.18); opacity: 0; transform: translateY(12px); transition: .2s ease; pointer-events: none; }.ai-toast.is-visible { opacity: 1; transform: translateY(0); }
@keyframes ai-spin { to { transform: rotate(360deg); } }
@media (max-width: 1100px) { .ai-flow { grid-template-columns: repeat(3,minmax(0,1fr)); }.ai-flow li::after { display: none; } }
@media (max-width: 900px) { .ai-flow { grid-template-columns: repeat(2,1fr); }.ai-result-grid { grid-template-columns: 1fr; }.ai-summary-card { display: grid; grid-template-columns: 1fr 1.3fr; column-gap: 20px; }.ai-summary-card h3, .ai-summary-card > p { grid-column: 1 / -1; }.ai-summary-card dl { margin-top: 10px; }.ai-validation-panel { grid-template-columns: 1fr; }.ai-score-card { min-height: 0; border-top: 1px solid var(--border); border-left: 0; } }
@media (max-width: 600px) { .ai-topbar { height: 58px; padding: 0 20px; }.ai-brand { font-size: 12px; }.ai-back-link { font-size: 0; }.ai-back-link svg { width: 19px; }.ai-main { width: min(100% - 32px,1180px); padding-top: 48px; }.ai-intro h1 { font-size: 40px; }.ai-intro p { font-size: 15px; }.ai-input-row { grid-template-columns: 1fr; }.ai-generate-button { min-height: 44px; }.ai-flow { grid-template-columns: 1fr; }.ai-flow li { min-height: 132px; }.ai-section-heading { align-items: flex-start; flex-direction: column; }.ai-preview-frame { height: 300px; }.ai-preview-frame iframe { transform: scale(.33); }.ai-summary-card { display: block; }.ai-validation-list { grid-template-columns: 1fr; }.ai-validation-item, .ai-validation-item:nth-child(even), .ai-validation-item--wide { grid-column: auto; border-right: 0; border-bottom: 1px solid var(--border); }.ai-validation-item:last-child { border-bottom: 0; } }