:root{--color-ink: #0f172a;--color-muted: #475569;--color-subtle: #94a3b8;--color-border: #e2e8f0;--color-border-light: #f1f5f9;--color-surface: #ffffff;--color-background: #f8fafc;--color-brand: #0891b2;--color-brand-hover: #0e7490;--color-brand-light: #cffafe;--color-accent: #f97316;--color-accent-hover: #ea580c;--color-accent-light: #ffedd5;--color-success: #059669;--color-success-light: #d1fae5;--color-error: #dc2626;--color-error-light: #fee2e2;--color-warning: #d97706;--color-warning-light: #fef3c7;color-scheme:light dark;--font-sans: "DM Sans", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;--font-mono: "JetBrains Mono", "Fira Code", monospace;--text-xs: .75rem;--text-sm: .875rem;--text-base: 1rem;--text-lg: 1.125rem;--text-xl: 1.25rem;--text-2xl: 1.5rem;--text-3xl: 1.875rem;--text-4xl: 2.25rem;--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;--max-width: 1100px;--max-width-narrow: 640px;--max-width-form: 420px;--header-height: 56px;--radius-sm: 6px;--radius-md: 8px;--radius-lg: 12px;--radius-xl: 16px;--radius-full: 9999px;--shadow-sm: 0 1px 2px rgba(15, 23, 42, .05);--shadow-md: 0 4px 12px rgba(15, 23, 42, .08);--shadow-lg: 0 10px 24px rgba(15, 23, 42, .12);--transition-fast: .15s ease;--transition-base: .2s ease;--transition-slow: .3s ease}*,*:before,*:after{box-sizing:border-box}html{height:100%;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}body{height:100%;margin:0;font-family:var(--font-sans);font-size:var(--text-base);line-height:1.6;color:var(--color-ink);background:var(--color-background)}h1,h2,h3,h4,h5,h6{margin:0;font-weight:600;line-height:1.25;color:var(--color-ink)}h1{font-size:var(--text-4xl)}h2{font-size:var(--text-3xl)}h3{font-size:var(--text-2xl)}h4{font-size:var(--text-xl)}p{margin:0;color:var(--color-muted)}a{color:inherit;text-decoration:none}code{font-family:var(--font-mono);font-size:.9em;background:var(--color-border-light);padding:.15em .4em;border-radius:var(--radius-sm)}input,textarea,select{font-family:inherit;font-size:var(--text-base)}input[type=text],input[type=email],input[type=password],input[type=datetime-local],textarea{display:block;width:100%;padding:var(--space-3) var(--space-4);border:1px solid var(--color-border);border-radius:var(--radius-md);background:var(--color-surface);color:var(--color-ink);transition:border-color var(--transition-fast),box-shadow var(--transition-fast)}input:focus,textarea:focus{outline:none;border-color:var(--color-brand);box-shadow:0 0 0 3px var(--color-brand-light)}input::placeholder,textarea::placeholder{color:var(--color-subtle)}label{display:block;font-size:var(--text-sm);font-weight:500;color:var(--color-muted);margin-bottom:var(--space-2)}.btn{display:inline-flex;align-items:center;justify-content:center;gap:var(--space-2);padding:var(--space-3) var(--space-4);font-family:inherit;font-size:var(--text-sm);font-weight:500;line-height:1.4;border-radius:var(--radius-md);border:1px solid transparent;cursor:pointer;transition:background var(--transition-fast),border-color var(--transition-fast),transform var(--transition-fast)}.btn:hover{transform:translateY(-1px)}.btn:active{transform:translateY(0)}.btn-primary{background:var(--color-brand);color:#fff;border-color:var(--color-brand)}.btn-primary:hover{background:var(--color-brand-hover);border-color:var(--color-brand-hover)}.btn-secondary{background:var(--color-surface);color:var(--color-ink);border-color:var(--color-border)}.btn-secondary:hover{background:var(--color-border-light);border-color:var(--color-border)}.btn-success{background:var(--color-success);color:#fff}.btn-success:hover{background:#047857}.container{max-width:var(--max-width);margin:0 auto;padding:var(--space-6)}.container-narrow{max-width:var(--max-width-narrow);margin:0 auto;padding:var(--space-6)}.container-form{max-width:var(--max-width-form);margin:0 auto;padding:var(--space-6)}.stack{display:grid;gap:var(--space-4)}.stack-sm{gap:var(--space-2)}.stack-md{gap:var(--space-4)}.stack-lg{gap:var(--space-6)}.stack-xl{gap:var(--space-8)}.cluster{display:flex;flex-wrap:wrap;gap:var(--space-3);align-items:center}.card{background:var(--color-surface);border:1px solid var(--color-border);border-radius:var(--radius-lg);padding:var(--space-4)}.card-featured{border:2px solid var(--color-brand)}.chip{display:inline-flex;align-items:center;padding:var(--space-1) var(--space-3);font-size:var(--text-xs);font-weight:500;background:var(--color-brand-light);color:var(--color-brand);border-radius:var(--radius-full)}.chip-neutral{background:var(--color-border-light);color:var(--color-ink)}.text-muted{color:var(--color-muted)}.text-subtle{color:var(--color-subtle)}.text-brand{color:var(--color-brand)}.text-success{color:var(--color-success)}.text-error{color:var(--color-error)}.font-semibold{font-weight:600}.font-bold{font-weight:700}.text-sm{font-size:var(--text-sm)}.text-lg{font-size:var(--text-lg)}.text-xl{font-size:var(--text-xl)}.visually-hidden{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap}@keyframes fadeIn{0%{opacity:0}to{opacity:1}}@keyframes slideUp{0%{opacity:0;transform:translateY(8px)}to{opacity:1;transform:translateY(0)}}.animate-fade-in{animation:fadeIn var(--transition-base) ease-out}.animate-slide-up{animation:slideUp var(--transition-slow) ease-out}@media (max-width: 640px){:root{--text-4xl: 1.875rem;--text-3xl: 1.5rem;--space-6: 1rem}.container,.container-narrow,.container-form{padding:var(--space-4)}}@media (prefers-color-scheme: dark){:root:not([data-theme=light]){--color-ink: #f1f5f9;--color-muted: #94a3b8;--color-subtle: #64748b;--color-border: #334155;--color-border-light: #1e293b;--color-surface: #0f172a;--color-background: #020617;--color-brand: #22d3ee;--color-brand-hover: #67e8f9;--color-brand-light: rgba(34, 211, 238, .15);--color-accent: #fb923c;--color-accent-hover: #fdba74;--color-accent-light: rgba(251, 146, 60, .15);--color-success: #34d399;--color-success-light: rgba(52, 211, 153, .15);--color-error: #f87171;--color-error-light: rgba(248, 113, 113, .15);--color-warning: #fbbf24;--color-warning-light: rgba(251, 191, 36, .15);--shadow-sm: 0 1px 2px rgba(0, 0, 0, .3);--shadow-md: 0 4px 12px rgba(0, 0, 0, .4);--shadow-lg: 0 10px 24px rgba(0, 0, 0, .5)}}[data-theme=dark]{--color-ink: #f1f5f9;--color-muted: #94a3b8;--color-subtle: #64748b;--color-border: #334155;--color-border-light: #1e293b;--color-surface: #0f172a;--color-background: #020617;--color-brand: #22d3ee;--color-brand-hover: #67e8f9;--color-brand-light: rgba(34, 211, 238, .15);--color-accent: #fb923c;--color-accent-hover: #fdba74;--color-accent-light: rgba(251, 146, 60, .15);--color-success: #34d399;--color-success-light: rgba(52, 211, 153, .15);--color-error: #f87171;--color-error-light: rgba(248, 113, 113, .15);--color-warning: #fbbf24;--color-warning-light: rgba(251, 191, 36, .15);--shadow-sm: 0 1px 2px rgba(0, 0, 0, .3);--shadow-md: 0 4px 12px rgba(0, 0, 0, .4);--shadow-lg: 0 10px 24px rgba(0, 0, 0, .5)}.theme-toggle{display:flex;align-items:center;justify-content:center;width:36px;height:36px;border:1px solid var(--color-border);border-radius:var(--radius-md);background:var(--color-surface);cursor:pointer;transition:all var(--transition-fast)}.theme-toggle:hover{border-color:var(--color-brand);background:var(--color-brand-light)}.theme-toggle svg{width:18px;height:18px;color:var(--color-muted);transition:color var(--transition-fast)}.theme-toggle:hover svg{color:var(--color-brand)}