/* Shared visual language. Load after page styles; keep feature layouts local. */
body.ui-shell {
    --ui-bg: #f6f8fc;
    --ui-surface: #fff;
    --ui-soft: #f0f4fa;
    --ui-text: #253047;
    --ui-muted: #788397;
    --ui-line: #e5eaf2;
    --ui-accent: #3578df;
    --ui-tint: #eaf2ff;
    --ui-header: rgba(255, 255, 255, .94);
    --ui-shadow: 0 6px 24px rgba(23, 34, 49, .045);
    --ui-radius: 12px;
    --ui-font: 'Noto Sans KR', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font: var(--ui-font);
    --font-family: var(--ui-font);
    --lounge-bg: var(--ui-bg);
    --lounge-surface: var(--ui-surface);
    --lounge-surface-solid: var(--ui-surface);
    --lounge-text: var(--ui-text);
    --lounge-muted: var(--ui-muted);
    --lounge-line: var(--ui-line);
    --lounge-accent: var(--ui-accent);
    --lounge-accent-2: var(--ui-accent);
    --lounge-shadow: var(--ui-shadow);
    --bg-main: var(--ui-bg) !important;
    --bg-secondary: var(--ui-surface) !important;
    --bg-tertiary: var(--ui-soft) !important;
    --bg-solid: var(--ui-surface);
    --bg-soft: var(--ui-surface);
    --bg-card: var(--ui-surface);
    --bg: var(--ui-bg);
    --panel: var(--ui-surface);
    --text-primary: var(--ui-text) !important;
    --text-secondary: var(--ui-muted) !important;
    --text: var(--ui-text);
    --muted: var(--ui-muted);
    --border-color: var(--ui-line) !important;
    --border: var(--ui-line) !important;
    --line: var(--ui-line);
    --accent: var(--ui-accent) !important;
    --accent-color: var(--ui-accent) !important;
    --gold: var(--ui-accent);
    --shadow-sm: var(--ui-shadow) !important;
    --shadow-md: var(--ui-shadow) !important;
    color-scheme: light;
    background: var(--ui-bg) !important;
    color: var(--ui-text);
    font-family: var(--ui-font);
    font-size: 14px;
    line-height: 1.7;
    min-width: 0;
    margin: 0;
}
body.ui-shell.dark-mode {
    --ui-bg: #131923;
    --ui-surface: #1b2432;
    --ui-soft: #222e3f;
    --ui-text: #e8edf7;
    --ui-muted: #9caac0;
    --ui-line: #2c394c;
    --ui-accent: #8cb9ff;
    --ui-tint: #263b59;
    --ui-header: rgba(16, 21, 28, .95);
    --ui-shadow: 0 6px 24px rgba(0, 0, 0, .12);
    color-scheme: dark;
}
body.ui-shell.lounge-fixed-nav { padding-top: 0 !important; }
.ui-shell *, .ui-shell *::before, .ui-shell *::after { box-sizing: border-box; }
.ui-shell :where(button, input, select, textarea) { font-family: inherit; }
.ui-shell :where(a, button, input, select, textarea, summary):focus-visible {
    outline: 3px solid var(--ui-accent);
    outline-offset: 3px;
}
.ui-shell :where(h1, h2, h3, h4) { font-family: var(--ui-font); letter-spacing: -.025em; text-transform: none; }
.ui-shell :where(p, label, .desc) { overflow-wrap: anywhere; }
.ui-shell .ui-header {
    position: sticky;
    top: 0;
    z-index: 3000;
    display: grid;
    grid-template-columns: minmax(150px, 1fr) auto minmax(150px, 1fr);
    align-items: center;
    gap: 20px;
    width: 100%;
    height: 72px;
    min-height: 72px;
    margin: 0;
    padding: 0 max(24px, calc((100vw - 1320px) / 2));
    border: 0;
    border-bottom: 1px solid var(--ui-line);
    background: var(--ui-header);
    color: var(--ui-text);
    box-shadow: none;
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    font: 500 13px/1.4 var(--ui-font);
    text-align: left;
}
.ui-header a { text-decoration: none; }
.ui-header .ui-brand { display: inline-flex; align-items: center; justify-self: start; min-width: 0; }
.ui-header .ui-brand-logo { display: block; width: 156px; max-width: 100%; height: 32px; object-fit: contain; filter: none; mix-blend-mode: normal; }
.ui-header .ui-nav { display: flex; align-items: stretch; gap: 2px; min-width: 0; margin: 0; padding: 0; }
.ui-header .ui-nav-link {
    position: relative;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    flex: 0 0 auto;
    min-height: 40px;
    padding: 0 12px;
    border-radius: 8px;
    color: var(--ui-muted);
    font-size: 13px;
    font-weight: 600;
    white-space: nowrap;
    transition: color .15s, background .15s;
}
.ui-header .ui-nav-link:hover { background: var(--ui-soft); color: var(--ui-text); }
.ui-header .ui-nav-link.is-current { color: var(--ui-accent); background: var(--ui-tint); }
.ui-header .ui-actions { display: flex; align-items: center; justify-self: end; gap: 7px; min-width: 0; }
.ui-header .ui-theme-form { display: flex; margin: 0; padding: 0; }
.ui-header .ui-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    flex: 0 0 auto;
    width: 38px;
    height: 38px;
    min-height: 38px;
    margin: 0;
    padding: 0;
    border: 1px solid transparent;
    border-radius: 9px;
    color: var(--ui-muted);
    background: transparent;
    cursor: pointer;
}
.ui-header .ui-icon:hover { color: var(--ui-text); background: var(--ui-soft); border-color: var(--ui-line); }
.ui-header .ui-icon svg { display: block; width: 19px; height: 19px; fill: none; stroke: currentColor; stroke-width: 1.6; stroke-linecap: round; stroke-linejoin: round; }
.ui-header .ui-account {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    min-height: 38px;
    max-width: 160px;
    padding: 0 13px;
    border: 1px solid var(--ui-line);
    border-radius: 9px;
    color: var(--ui-text);
    background: var(--ui-surface);
    font-size: 12px;
    font-weight: 600;
    white-space: nowrap;
}
.ui-account > span:last-child { overflow: hidden; text-overflow: ellipsis; }
.ui-header .ui-account:hover, .ui-header .ui-account[aria-current] { border-color: var(--ui-accent); color: var(--ui-accent); }
.ui-header .ui-account-dot { width: 6px; height: 6px; flex: 0 0 auto; background: var(--ui-accent); border-radius: 50%; }
.ui-header .ui-account-menu { position: relative; margin: 0; }
.ui-header summary.ui-account { cursor: pointer; list-style: none; }
.ui-header summary.ui-account::-webkit-details-marker { display: none; }
.ui-header .ui-account-panel { position: absolute; top: calc(100% + 10px); right: 0; display: grid; gap: 2px; width: 180px; padding: 6px; border: 1px solid var(--ui-line); border-radius: 10px; background: var(--ui-surface); box-shadow: var(--ui-shadow); }
.ui-header .ui-account-panel a { display: block; padding: 10px 12px; border-radius: 6px; color: var(--ui-text); font-size: 13px; white-space: nowrap; }
.ui-header .ui-account-panel a:hover { background: var(--ui-soft); }
.ui-shell .ui-context { display: flex; justify-content: flex-end; flex-wrap: wrap; gap: 16px; width: min(1180px, calc(100% - 40px)); margin: 16px auto 0; padding: 0; font-size: 12px; }
.ui-context a { color: var(--ui-muted); text-decoration: none; }
.ui-context a:hover { color: var(--ui-accent); }
.ui-skip { position: fixed; top: -100px; left: 16px; z-index: 4000; padding: 12px 18px; border-radius: 8px; background: var(--ui-text); color: var(--ui-bg); }
.ui-skip:focus { top: 12px; }
.ui-shell .ui-content-anchor { scroll-margin-top: 128px; }

/* Shared surfaces, without changing each tool's grid, canvas or content. */
body.ui-shell :is(.login-card, .signup-card, .note-card, .blog-item, .filter-card, .work-card, .tool-card, .info-card, .stat-card, .input-card, .output-card, .editor-panel, .preview-panel, .control-panel, .analysis-panel, .result-card, .queue-panel, .card) {
    border-color: var(--ui-line) !important;
    border-radius: var(--ui-radius) !important;
    background: var(--ui-surface) !important;
    box-shadow: var(--ui-shadow);
}
.ui-shell :is(.blog-container, .page-shell, .shell, .info-page) { width: 100%; max-width: 1180px; margin-inline: auto; padding-inline: 24px; }
.ui-shell :is(.blog-header-title, .page-head, .page-heading) { border-color: var(--ui-line); }
.ui-shell :is(.blog-header-title h2, .page-head h1, .page-heading h1) { color: var(--ui-text); font-size: clamp(23px, 3vw, 30px); line-height: 1.35; }
.ui-shell :is(.btn, .lounge-btn, .btn-custom, .btn-submit, .btn-login, .btn-signup, .page-btn, .page-link-btn) { border-radius: 8px; font-weight: 600; transition: background .15s, border-color .15s, color .15s; }
.ui-shell :is(.btn-primary, .btn.primary, .lounge-btn.primary, .btn-submit, .btn-login, .btn-signup) {
    background: var(--ui-accent);
    border-color: var(--ui-accent);
    color: #fff !important;
}
.ui-shell.dark-mode :is(.btn-primary, .btn.primary, .lounge-btn.primary, .btn-submit, .btn-login, .btn-signup) { color: #17202b !important; filter: none; }
.ui-shell :is(.btn-primary, .btn.primary, .lounge-btn.primary, .btn-submit, .btn-login, .btn-signup):hover { filter: brightness(.94); }
body.ui-shell :is(.form-control, .form-select, .form-input, .search-input, .filter-input, .filter-field) {
    min-height: 42px;
    border: 1px solid var(--ui-line);
    border-radius: 8px;
    background: var(--ui-surface) !important;
    color: var(--ui-text) !important;
    box-shadow: none;
}
body.ui-shell :is(.form-control, .form-select, .form-input, .search-input, .filter-input, .filter-field)::placeholder { color: var(--ui-muted); opacity: 1; }
body.ui-shell :is(.form-control, .form-select, .form-input, .search-input, .filter-input, .filter-field):focus { border-color: var(--ui-accent); box-shadow: 0 0 0 3px var(--ui-tint); }
.ui-shell :is(.tag-chip, .tag-pill, .blog-tag, .tag-badge) { background: var(--ui-tint); color: var(--ui-accent); }
.ui-shell :is(.site-footer, .footer) { color: var(--ui-muted); border-color: var(--ui-line); font-size: 12px; }
.ui-shell :is(.table, .list-group-item) { color: var(--ui-text); border-color: var(--ui-line); }

/* Keep the illustrated home, with the same type and accents as inner pages. */
.ui-shell[data-ui-page="main"] .hero { min-height: min(760px, calc(100svh - 72px)); align-items: center; padding: 96px 0 64px; }
.ui-shell[data-ui-page="main"] .hero::before {
    background: linear-gradient(90deg, var(--ui-bg) 5%, transparent 100%), linear-gradient(0deg, var(--ui-bg), transparent 85%), url('/image/10.png') center / cover no-repeat;
}
.ui-shell[data-ui-page="main"] .hero::after { opacity: .2; }
.ui-shell[data-ui-page="main"] .hero-title { font-size: clamp(44px, 6vw, 80px); line-height: 1.12; text-align: left; color: var(--ui-text) !important; }
.ui-shell[data-ui-page="main"] .hero-title .accent { color: var(--ui-accent); background: none; animation: none; }
.ui-shell[data-ui-page="main"] .hero-panel { min-height: 420px; }
.ui-shell[data-ui-page="main"] .memory-float { opacity: .18; }
.ui-shell .action-btn { border-radius: 8px; font-weight: 600; }
.ui-shell .action-btn.primary { background: var(--ui-accent); border-color: var(--ui-accent); color: #fff; }
.ui-shell.dark-mode .action-btn.primary { color: #17202b; }
.ui-shell[data-ui-page="login"] a.btn-signup { margin-top: 16px; padding: 8px 0; border: 0; background: transparent; color: var(--ui-muted) !important; font-size: 13px; }

@media (max-width: 1050px) {
    .ui-shell .ui-header { grid-template-columns: 1fr auto; gap: 0 12px; height: auto; padding: 12px 20px 0; }
    .ui-header .ui-brand { grid-column: 1; grid-row: 1; }
    .ui-header .ui-actions { grid-column: 2; grid-row: 1; }
    .ui-header .ui-nav { grid-column: 1 / -1; grid-row: 2; justify-content: center; gap: 4px; overflow-x: auto; padding: 10px 0 9px; scrollbar-width: thin; }
    .ui-header .ui-nav-link { min-height: 36px; }
}
@media (max-width: 600px) {
    .ui-shell .ui-header { padding: 10px 14px 0; }
    .ui-header .ui-brand-logo { width: 136px; height: 28px; }
    .ui-header .ui-actions { gap: 2px; }
    .ui-header .ui-account { max-width: 100px; padding: 0 9px; gap: 6px; }
    .ui-header .ui-icon { width: 34px; height: 36px; min-height: 36px; }
    .ui-header .ui-nav { justify-content: flex-start; gap: 2px; margin-inline: -3px; }
    .ui-header .ui-nav-link { padding-inline: 11px; font-size: 12px; }
    .ui-shell :is(.blog-container, .page-shell, .shell, .info-page) { padding-inline: 16px; }
    .ui-shell[data-ui-page="login"] .layout-container,
    .ui-shell[data-ui-page="signup"] .layout-container { padding-top: 24px !important; }
    .ui-shell :is(.login-card, .signup-card) { padding: 28px 22px; }
    .ui-shell[data-ui-page="main"] .hero { min-height: auto; padding: 48px 0 32px; }
    .ui-shell[data-ui-page="main"] .hero-title { font-size: clamp(38px, 11vw, 60px); }
    .ui-shell[data-ui-page="main"] .hero-panel { min-height: 300px; }
    .ui-shell[data-ui-page="main"] .character { max-height: 340px; object-fit: contain; }
}
@media (prefers-reduced-motion: reduce) {
    .ui-shell *, .ui-shell *::before, .ui-shell *::after { scroll-behavior: auto !important; transition: none !important; animation: none !important; }
}