:root{--color-bg: #f5f5f5;--color-surface: #ffffff;--color-text: #1a1a1a;--color-text-muted: #666666;--color-text-light: #888888;--color-primary: #000000;--color-primary-hover: #222222;--color-border: #e5e5e5;--color-border-focus: #000000;--color-success: #22c55e;--color-error: #ef4444;--color-warning: #f59e0b;--radius-sm: 8px;--radius-md: 12px;--radius-lg: 16px;--shadow-sm: 0 1px 2px rgba(0, 0, 0, .05);--shadow-md: 0 4px 12px rgba(0, 0, 0, .08);--shadow-lg: 0 8px 24px rgba(0, 0, 0, .12);--font-sans: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif}@media(prefers-color-scheme:dark){:root{--color-bg: #0a0a0a;--color-surface: #171717;--color-text: #fafafa;--color-text-muted: #a3a3a3;--color-text-light: #737373;--color-primary: #ffffff;--color-primary-hover: #e5e5e5;--color-border: #262626;--color-border-focus: #ffffff}}*{margin:0;padding:0;box-sizing:border-box}html,body{height:100%}body{font-family:var(--font-sans);background-color:var(--color-bg);color:var(--color-text);line-height:1.5;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}.container{width:100%;max-width:600px;margin:0 auto;padding:0 20px}.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:12px 24px;font-size:15px;font-weight:600;font-family:inherit;border:none;border-radius:var(--radius-sm);cursor:pointer;transition:all .15s ease;text-decoration:none}.btn:disabled{opacity:.5;cursor:not-allowed}.btn-primary{background-color:var(--color-primary);color:var(--color-surface)}.btn-primary:hover:not(:disabled){background-color:var(--color-primary-hover)}.btn-secondary{background-color:transparent;color:var(--color-text);border:1px solid var(--color-border)}.btn-secondary:hover:not(:disabled){background-color:var(--color-border)}.btn-lg{padding:16px 32px;font-size:16px;border-radius:var(--radius-md)}.btn-full{width:100%}.input-group{margin-bottom:16px}.input-group label{display:block;font-size:14px;font-weight:500;margin-bottom:6px;color:var(--color-text)}.input-group input,.input-group textarea{width:100%;padding:12px 16px;font-size:16px;font-family:inherit;background-color:var(--color-surface);border:1px solid var(--color-border);border-radius:var(--radius-sm);color:var(--color-text);outline:none;transition:border-color .15s ease,box-shadow .15s ease}.input-group input:focus,.input-group textarea:focus{border-color:var(--color-border-focus);box-shadow:0 0 0 3px #0000001a}@media(prefers-color-scheme:dark){.input-group input:focus,.input-group textarea:focus{box-shadow:0 0 0 3px #ffffff1a}}.input-group input::placeholder,.input-group textarea::placeholder{color:var(--color-text-light)}.input-group textarea{min-height:100px;resize:vertical}.card{background-color:var(--color-surface);border-radius:var(--radius-lg);box-shadow:var(--shadow-md);overflow:hidden}.card-header{padding:24px 24px 0}.card-body{padding:24px}.card-footer{padding:0 24px 24px}@keyframes fadeIn{0%{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}.fade-in{animation:fadeIn .3s ease forwards}@keyframes spin{to{transform:rotate(360deg)}}.animate-spin{animation:spin 1s linear infinite}body{font-family:Inter,-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif;margin:0;padding:0;min-height:100vh;overflow-x:hidden}