:root{--color-bg:#f4f7fb;--color-surface:#ffffff;--color-border:rgba(15,23,42,0.12);--color-text:rgba(17,24,39,0.92);--color-text-muted:rgba(75,85,99,0.82);--color-primary:#1a73e8;--color-primary-hover:#1558b0;--color-danger-bg:#fef2f2;--color-danger-border:#fecaca;--color-danger-text:#991b1b;--color-info-bg:#eff6ff;--color-info-border:#bfdbfe;--color-info-text:#1d4ed8;--radius-md:12px;--radius-lg:20px;--space-1:4px;--space-2:8px;--space-3:12px;--space-4:16px;--space-5:24px;--space-6:32px;--shadow-1:0 1px 2px rgba(15,23,42,0.06);--shadow-2:0 12px 28px rgba(15,23,42,0.10)}*,*::before,*::after{box-sizing:border-box}html{font-size:16px}body{margin:0;min-height:100vh;color:var(--color-text);background:radial-gradient(circle at top left,rgba(26,115,232,0.12),transparent 28%),linear-gradient(180deg,rgba(26,115,232,0.04),rgba(26,115,232,0) 220px),var(--color-bg);font-family:"Roboto","Noto Sans JP","Hiragino Sans","Yu Gothic UI","Yu Gothic",sans-serif;line-height:1.6}button,input{font:inherit}.container{width:min(100% - 32px,560px);margin:72px auto 0}.card{background:var(--color-surface);border:1px solid var(--color-border);border-radius:var(--radius-lg);overflow:hidden}.shadow{box-shadow:var(--shadow-2)}.card-body{padding:var(--space-6) var(--space-5)}.text-center{text-align:center}.mb-3{margin-bottom:var(--space-4)}.mb-4{margin-bottom:var(--space-5)}.form-label{display:inline-block;margin-bottom:var(--space-2);font-size:0.9375rem;font-weight:700}.form-control{width:100%;min-height:48px;padding:0 var(--space-4);color:var(--color-text);background:#fff;border:1px solid var(--color-border);border-radius:var(--radius-md);outline:none;transition:border-color 0.14s ease,box-shadow 0.14s ease}.form-control:focus{border-color:var(--color-primary);box-shadow:0 0 0 4px rgba(26,115,232,0.14)}.btn{display:inline-flex;align-items:center;justify-content:center;min-height:48px;padding:0 var(--space-4);border:1px solid transparent;border-radius:var(--radius-md);cursor:pointer;font-weight:700;transition:background-color 0.14s ease,border-color 0.14s ease,transform 0.14s ease}.btn:hover{transform:translateY(-1px)}.btn-sm{min-height:40px;padding:0 var(--space-3);font-size:0.875rem}.btn-primary{color:#fff;background:var(--color-primary)}.btn-primary:hover{background:var(--color-primary-hover)}.btn-outline-secondary{color:var(--color-text);background:#fff;border-color:var(--color-border)}.btn-outline-secondary:hover{background:#f8fafc}.w-100{width:100%}.alert{padding:var(--space-3) var(--space-4);border:1px solid transparent;border-radius:var(--radius-md);font-size:0.9375rem}.alert-danger{color:var(--color-danger-text);background:var(--color-danger-bg);border-color:var(--color-danger-border)}.alert-info{color:var(--color-info-text);background:var(--color-info-bg);border-color:var(--color-info-border)}@media (max-width:640px){.container{margin-top:40px}.card-body{padding:var(--space-5) var(--space-4)}}.hero-panel--login{display:flex;align-items:center;justify-content:space-between;gap:var(--space-4)}.hero-panel--login .hero-copy{display:grid;gap:var(--space-2)}.hero-panel--login .hero-actions{margin-top:0;margin-left:auto}.hero-panel--login h1{font-size:2.8rem;line-height:1.1}.hero-panel--login .status-chip{color:var(--color-primary);background:rgba(26,115,232,0.10)}.section-card__body{gap:var(--space-3)}