body {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
}

.auth-container {
    max-width: 480px;
    width: 100%;
    background: var(--bg-card);
    border-radius: var(--radius-xl);
    padding: 48px 40px;
    border: 2px solid var(--border);
    box-shadow: var(--shadow-lg);
}

.auth-logo {
    display: block;
    margin: 0 auto 28px;
    height: 72px;
    width: auto;
    object-fit: contain;
}

h1 {
    font-size: 2em;
    font-weight: 800;
    text-align: center;
    margin-bottom: 16px;
    color: var(--text-primary);
    letter-spacing: -0.03em;
}

.warning-text {
    text-align: center;
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: 40px;
    font-size: 0.95em;
}

.warning-text strong {
    color: var(--coral);
    font-weight: 700;
}

.form-group input {
    font-size: 1.15em;
    text-align: center;
    letter-spacing: 2.5px;
    text-transform: uppercase;
    font-family: 'SF Mono', 'Fira Code', 'Consolas', monospace;
}

.form-group input::placeholder {
    letter-spacing: 1.5px;
    font-size: 0.82em;
    font-family: 'Google Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
}

.form-group input:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

/* ── Shake animation on failed attempt ── */
@keyframes shake {
    0%, 100% { transform: translateX(0); }
    15% { transform: translateX(-8px); }
    30% { transform: translateX(6px); }
    45% { transform: translateX(-4px); }
    60% { transform: translateX(3px); }
    75% { transform: translateX(-1px); }
}

.form-group input.shake {
    animation: shake 0.5s ease-out;
    border-color: var(--coral) !important;
}

/* ── Lockout banner ── */
.lockout-banner {
    display: none;
    align-items: center;
    gap: 14px;
    margin-top: 20px;
    padding: 16px 20px;
    background: #FFF3E0;
    border: 2px solid var(--amber);
    border-radius: var(--radius-md);
}

.lockout-banner.show {
    display: flex;
}

.lockout-icon {
    width: 36px;
    height: 36px;
    background: var(--amber);
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.lockout-icon img {
    width: 20px;
    height: 20px;
    filter: brightness(0) invert(1);
}

.lockout-text {
    color: #B8860B;
    font-size: 0.88em;
    font-weight: 600;
    line-height: 1.4;
}

.lockout-time {
    font-family: 'SF Mono', 'Fira Code', 'Consolas', monospace;
    font-size: 1.05em;
    font-weight: 700;
    color: #D97706;
}

/* ── Attempts remaining indicator ── */
.attempts-info {
    display: none;
    text-align: center;
    margin-top: 14px;
    font-size: 0.82em;
    font-weight: 600;
    color: var(--text-tertiary);
}

.attempts-info.show {
    display: block;
}

.footer-note {
    text-align: center;
    color: var(--text-tertiary);
    font-size: 0.8em;
    margin-top: 32px;
    line-height: 1.5;
}

@media (max-width: 520px) {
    .auth-container {
        padding: 36px 24px;
    }

    .form-group input {
        font-size: 1em;
        letter-spacing: 1.5px;
    }
}