:root{--brand-primary: #1a1a1a;--brand-on-primary: #ffffff;--brand-secondary: #1a1a1a;--bg-page: #f1efe8;--bg-surface: #ffffff;--bg-surface-alt: #f5f5f0;--bg-disabled: #e5e5e0;--text-primary: #1a1a1a;--text-secondary: #5f5e5a;--text-tertiary: #888780;--border-default: rgba(0,0,0,.12);--border-strong: rgba(0,0,0,.25);--color-error: #A32D2D;--color-error-bg: #FCEBEB;--color-success: #1D9E75;--color-success-bg: #E1F5EE;--color-info: #185FA5;--color-warning: #854F0B;--color-warning-bg: #FAEEDA;--radius-md: 8px;--radius-lg: 12px;--radius-xl: 16px}@media (prefers-color-scheme: dark){:root{--bg-page: #0f0f0e;--bg-surface: #1c1c1a;--bg-surface-alt: #262624;--bg-disabled: #2c2c2a;--text-primary: #f5f4ee;--text-secondary: #b4b2a9;--text-tertiary: #888780;--border-default: rgba(255,255,255,.12);--border-strong: rgba(255,255,255,.3);--color-error: #F09595;--color-error-bg: #501313;--color-success: #5DCAA5;--color-success-bg: #04342C;--color-info: #85B7EB;--color-warning: #FAC775;--color-warning-bg: #412402}}*{box-sizing:border-box;margin:0;padding:0;-webkit-tap-highlight-color:transparent}html,body{height:100%;width:100%;overflow-x:hidden}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica Neue,Arial,sans-serif;background:var(--bg-page);color:var(--text-primary);font-size:16px;line-height:1.5;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}input,button,textarea,select{font-family:inherit;font-size:inherit;color:inherit}input:focus,button:focus,textarea:focus,select:focus{outline:none}button{cursor:pointer;border:none;background:none}button:disabled{cursor:not-allowed}a{color:var(--color-info);text-decoration:underline}img{max-width:100%;height:auto;display:block}.app-shell{min-height:100vh;min-height:100dvh;display:flex;flex-direction:column;padding:24px 20px 32px;max-width:480px;margin:0 auto;width:100%}.brand-bar{display:flex;justify-content:center;margin-bottom:24px;padding-top:8px;min-height:48px}.brand-bar img{max-height:48px;max-width:240px;object-fit:contain}.title{font-size:24px;font-weight:600;line-height:1.25;margin-bottom:12px;color:var(--text-primary)}.title-large{font-size:28px;font-weight:600;line-height:1.2;margin-bottom:16px}.subtitle-text{font-size:15px;line-height:1.55;color:var(--text-secondary);margin-bottom:24px;text-align:justify}.helper{font-size:13px;color:var(--text-tertiary);margin-top:8px;line-height:1.4}.input-large{width:100%;height:64px;font-size:28px;font-weight:500;padding:0 16px;background:var(--bg-surface-alt);border:2px solid var(--border-default);border-radius:var(--radius-lg);color:var(--text-primary);text-align:center;letter-spacing:1px;transition:border-color .15s}.input-large:focus{border-color:var(--brand-primary)}.input-label{font-size:14px;font-weight:500;color:var(--text-primary);margin-bottom:8px;display:block}.btn-primary{width:100%;height:64px;background:var(--brand-primary);color:var(--brand-on-primary);border-radius:var(--radius-lg);font-size:18px;font-weight:700;margin-top:auto;transition:filter .15s}.btn-primary:active{filter:brightness(.9)}.btn-primary:disabled{background:var(--bg-disabled);color:var(--text-tertiary)}.btn-secondary{width:100%;height:56px;background:transparent;color:var(--text-primary);border:2px solid var(--border-strong);border-radius:var(--radius-lg);font-size:16px;font-weight:500;margin-top:12px}.error-message{background:var(--color-error-bg);color:var(--color-error);padding:12px 16px;border-radius:var(--radius-md);font-size:14px;text-align:center;margin-bottom:16px;font-weight:500}.footer-mini{font-size:11px;color:var(--text-tertiary);text-align:center;margin-top:16px;padding-top:16px;border-top:1px solid var(--border-default)}@keyframes spin{to{transform:rotate(360deg)}}