:root{--font-sans:-apple-system, BlinkMacSystemFont, "Segoe UI", "Noto Sans TC", "PingFang TC", "Microsoft JhengHei", sans-serif}*{box-sizing:border-box}html,body{min-height:100%}body{font-family:var(--font-sans);-webkit-font-smoothing:antialiased;text-rendering:optimizelegibility;background:canvas;margin:0}.app-surface{min-height:100vh;color:var(--ktl-color-text);background:var(--ktl-color-bg-layout);font-family:var(--ktl-font-family)}a{color:inherit;text-decoration:none}button,input,textarea,select{font:inherit}.storefront-shell{grid-template-rows:auto 1fr auto;min-height:100vh;display:grid}.storefront-header,.storefront-footer{background:var(--ktl-color-bg-container);text-align:center;padding:10px clamp(20px,5vw,72px)}.storefront-header{border-bottom:1px solid var(--ktl-color-border);justify-content:space-between;align-items:center;gap:16px;padding:20px 24px;display:flex}.storefront-header-actions{align-items:center;gap:12px;display:flex}.storefront-brand{color:var(--ktl-color-primary);letter-spacing:.04em;font-size:24px;font-weight:700}.storefront-main{width:min(1120px,100%);margin:0 auto;padding:16px}.storefront-footer{color:var(--ktl-color-text-secondary);border-top:1px solid var(--ktl-color-border)}.foundation-placeholder{border:1px solid var(--ktl-color-border);background:var(--ktl-color-bg-container);border-radius:16px;max-width:640px;padding:40px}.foundation-placeholder h1{color:var(--ktl-color-primary);margin:0 0 12px;font-size:clamp(32px,7vw,56px)}.foundation-placeholder p{color:var(--ktl-color-text-secondary);margin:0;font-size:18px;line-height:1.7}.admin-login-page{background:var(--ktl-color-bg-layout);justify-content:center;align-items:center;min-height:100vh;padding:24px;display:flex}.admin-login-card{background:var(--ktl-color-bg-container);border:1px solid var(--ktl-color-border);border-radius:16px;width:100%;max-width:400px;padding:40px 32px;box-shadow:0 12px 32px #1c191714}.admin-login-title{color:var(--ktl-color-primary);text-align:center;margin:0 0 4px;font-size:24px;font-weight:700}.admin-login-subtitle{color:var(--ktl-color-text-secondary);text-align:center;margin:0 0 28px}