/* ========================================
   BEAMX1 Demo v2 — Login Screen
   PIN-based authentication
   ======================================== */

.login-screen {
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    padding: var(--space-lg);
    position: relative;
    overflow: hidden;
}

/* Background effect */
.login-screen::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, var(--beam-glow) 0%, transparent 70%);
    opacity: 0.4;
    pointer-events: none;
}

.login-box {
    width: 100%;
    max-width: 380px;
    text-align: center;
    position: relative;
    z-index: 1;
}

/* Logo */
.login-logo {
    margin-bottom: var(--space-2xl);
}

.login-logo svg {
    width: 64px;
    height: 64px;
    margin: 0 auto var(--space-md);
}

.login-logo h1 {
    font-family: var(--font-display);
    font-size: 1.75rem;
    font-weight: 800;
    letter-spacing: -0.02em;
}

.login-logo h1 span {
    color: var(--beam);
}

.login-subtitle {
    font-size: 0.875rem;
    color: var(--text-muted);
    margin-top: var(--space-xs);
}

/* PIN Input */
.pin-group {
    margin-bottom: var(--space-lg);
}

.pin-label {
    display: block;
    text-align: left;
    font-size: 0.8125rem;
    font-weight: 500;
    color: var(--text-secondary);
    margin-bottom: var(--space-sm);
}

.pin-dots {
    display: flex;
    justify-content: center;
    gap: 12px;
    margin: var(--space-lg) 0;
}

.pin-dot {
    width: 14px;
    height: 14px;
    border-radius: 50%;
    border: 2px solid var(--border-hover);
    background: transparent;
    transition: all var(--duration) var(--ease);
}

.pin-dot.filled {
    background: var(--beam);
    border-color: var(--beam);
    box-shadow: 0 0 12px var(--beam-glow);
}

.pin-dot.error {
    background: var(--danger);
    border-color: var(--danger);
    animation: dotShake 0.4s var(--ease);
}

@keyframes dotShake {
    0%, 100% { transform: translateX(0); }
    25% { transform: translateX(-6px); }
    75% { transform: translateX(6px); }
}

/* PIN hidden input */
.pin-input {
    position: absolute;
    opacity: 0;
    width: 0;
    height: 0;
}

/* Numpad */
.numpad {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 8px;
    max-width: 280px;
    margin: 0 auto;
}

.numpad-btn {
    height: 56px;
    border-radius: var(--radius-md);
    background: var(--bg-card);
    border: 1px solid var(--border);
    color: var(--text-primary);
    font-family: var(--font-body);
    font-size: 1.25rem;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--duration) var(--ease);
    display: flex;
    align-items: center;
    justify-content: center;
}

.numpad-btn:hover {
    background: var(--bg-card-hover);
    border-color: var(--border-hover);
}

.numpad-btn:active {
    transform: scale(0.95);
    background: var(--beam-soft);
}

.numpad-btn.empty {
    visibility: hidden;
}

.numpad-btn.backspace {
    font-size: 1rem;
}

.numpad-btn.backspace svg {
    width: 22px;
    height: 22px;
    color: var(--text-secondary);
}

/* Login error message */
.login-error {
    color: var(--danger);
    font-size: 0.8125rem;
    min-height: 20px;
    margin-top: var(--space-sm);
    transition: opacity var(--duration) var(--ease);
}

/* Login loading */
.login-loading {
    display: none;
    align-items: center;
    justify-content: center;
    gap: var(--space-md);
    padding: var(--space-lg);
}

.login-loading.active {
    display: flex;
}

@media (max-width: 480px) {
    .numpad-btn {
        height: 48px;
        font-size: 1.125rem;
    }
}