.signin-container{min-height:100vh;min-height:100svh;display:flex;align-items:center;justify-content:center;background-color:var(--background-secondary);padding:1rem}.signin-card{background-color:var(--surface-primary);border-radius:12px;padding:2.5rem;max-width:400px;width:100%;box-shadow:var(--shadow-dialog);text-align:center}.signin-title{margin:0 0 .25rem;font-size:1.75rem;font-weight:700;color:var(--header-bg)}.signin-subtitle{margin:0 0 1.5rem;color:var(--text-secondary);font-size:.95rem}.signin-error{background-color:var(--status-error-bg);color:var(--status-error-text);padding:.75rem 1rem;border-radius:6px;margin-bottom:1rem;font-size:.9rem}.signin-buttons{display:flex;flex-direction:column;gap:.75rem;margin-bottom:1.5rem}.signin-btn{padding:.75rem 1.5rem;border-radius:6px;border:1px solid var(--border-medium);font-size:.95rem;font-weight:600;cursor:pointer;font-family:inherit;transition:opacity .15s ease,box-shadow .15s ease}.signin-btn:hover{opacity:.9;box-shadow:0 2px 6px rgba(0,0,0,.12)}.signin-btn--google{background-color:var(--surface-primary);color:var(--text-on-surface);border-color:var(--border-color)}.signin-btn--github{background-color:#24292e;color:#fff;border-color:#24292e}.signin-logo{margin-bottom:1rem}.signin-footer{margin:0;color:var(--text-secondary);font-size:.8rem;line-height:1.5}@media (max-width:767px){.signin-card{padding:2rem 1.5rem}.signin-btn{min-height:48px}}