/* Authentication Overlay Styles */
.auth-overlay { position: fixed; inset: 0; background: radial-gradient(1200px 600px at 20% -10%, rgba(59,130,246,0.15), transparent), radial-gradient(1000px 500px at 120% 120%, rgba(16,185,129,0.12), transparent), rgba(0,0,0,0.35); display: flex; align-items: center; justify-content: center; z-index: 1000; padding: 16px; }
.auth-overlay.hidden { display: none; }
.auth-card { background: var(--card-bg); color: var(--text-primary); border-radius: 16px; padding: 28px; width: 100%; max-width: 520px; box-shadow: var(--shadow-lg); border: 1px solid var(--border-light); position: relative; overflow: hidden; animation: auth-pop 240ms ease-out; }
.auth-card::before { content: ''; position: absolute; top: 0; left: 0; right: 0; height: 4px; background: linear-gradient(90deg, var(--primary-color), #10b981, #8b5cf6); opacity: 0.9; }
@keyframes auth-pop { from { transform: translateY(6px); opacity: 0; } to { transform: translateY(0); opacity: 1; } }
.dark-mode .auth-card { background: #111827; color: #f9fafb; border-color: #1f2937; }
.auth-header { display: flex; align-items: center; gap: 12px; margin-bottom: 12px; }
.auth-header .logo-mark { font-size: 24px; }
.auth-subtitle { color: var(--text-secondary); font-size: 14px; margin-top: 2px; }
.auth-tabs { display: flex; gap: 8px; margin: 12px 0; }
.auth-tabs .tab-btn { flex: 1; padding: 10px 12px; border: 1px solid var(--border-color); border-radius: 8px; background: var(--bg-secondary); color: var(--text-primary); cursor: pointer; transition: background 0.2s ease, border-color 0.2s ease; }
.auth-tabs .tab-btn.active { background: var(--primary-color); border-color: var(--primary-color); color: #fff; }
.auth-form { display: flex; flex-direction: column; gap: 12px; margin-top: 12px; }
.input-row { display: flex; gap: 10px; flex-wrap: wrap; }
.input-control { position: relative; width: 100%; }
.input-control input { width: 100%; padding: 12px 40px 12px 40px; border: 1px solid var(--border-color); border-radius: 10px; background: #fff; color: var(--text-primary); transition: border-color 0.2s ease, box-shadow 0.2s ease; }
.dark-mode .input-control input { background: #0b1220; border-color: #1f2a37; color: #f9fafb; }
.input-control select { width: 100%; padding: 12px; border: 1px solid var(--border-color); border-radius: 10px; background: #fff; color: var(--text-primary); transition: border-color 0.2s ease, box-shadow 0.2s ease; }
.dark-mode .input-control select { background: #0b1220; border-color: #1f2a37; color: #f9fafb; }
.input-control input:focus, .input-control select:focus { outline: none; border-color: var(--border-focus); box-shadow: 0 0 0 3px rgba(59,130,246,0.15); }
.input-icon { position: absolute; left: 10px; top: 50%; transform: translateY(-50%); opacity: 0.7; }
.toggle-visibility { position: absolute; right: 8px; top: 50%; transform: translateY(-50%); background: transparent; border: 0; cursor: pointer; font-size: 16px; opacity: 0.7; }
.toggle-visibility:hover { opacity: 1; }
.auth-actions { display: flex; align-items: center; justify-content: space-between; gap: 12px; margin-top: 4px; }
.remember { display: flex; align-items: center; gap: 8px; color: var(--text-secondary); font-size: 13px; }
.link-muted { background: transparent; border: 0; color: var(--primary-color); cursor: pointer; font-size: 13px; }
.link-muted:hover { text-decoration: underline; }
.helper { color: var(--text-secondary); font-size: 12px; }
.auth-submit { width: 100%; padding: 10px 12px; border-radius: 10px; background: var(--primary-color); color: #fff; border: 1px solid var(--primary-color); box-shadow: var(--shadow-md); transition: background 0.15s ease, transform 0.05s ease; }
.auth-submit:hover { background: var(--primary-hover); border-color: var(--primary-hover); }
.auth-submit:active { transform: translateY(1px); }
.feedback { min-height: 18px; font-size: 12px; }
.feedback.error { color: var(--danger-color); }
.feedback.success { color: var(--success-color); }
.password-strength { display: none; gap: 6px; align-items: center; }
.password-strength .bar { flex: 1; height: 6px; border-radius: 4px; background: var(--bg-secondary); overflow: hidden; }
.password-strength .fill { height: 100%; width: 0%; background: var(--danger-color); transition: width 0.25s ease; }
.password-strength .label { font-size: 12px; color: var(--text-secondary); width: 80px; text-align: right; }
.separator { display: flex; align-items: center; gap: 8px; margin: 8px 0; color: var(--text-secondary); font-size: 12px; }
.separator::before, .separator::after { content: ''; flex: 1; height: 1px; background: var(--border-color); }
.small-note { color: var(--text-secondary); font-size: 12px; margin-top: 6px; }
.user-actions { margin-top: 16px; padding: 8px 0; }
#currentUserDisplay { font-size: 12px; color: var(--text-secondary); margin-bottom: 8px; }