/* auth.css - Premium Glassmorphism UI */

.auth-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background: var(--bg-main);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 9999;
    transition: opacity 0.5s ease, visibility 0.5s;
}

.auth-overlay::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(15, 23, 42, 0.8), rgba(0, 0, 0, 0.95));
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
}

.auth-overlay.hidden {
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
}

.glass-panel {
    background: var(--bg-card);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid var(--card-border);
    border-radius: 24px;
    box-shadow: 0 4px 30px rgba(0, 0, 0, 0.15);
    padding: 3rem;
    width: 90%;
    max-width: 420px;
    position: relative;
    z-index: 100;
    display: flex;
    flex-direction: column;
    align-items: center;
    animation: slideUp 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}

@keyframes slideUp {
    0% { transform: translateY(40px); opacity: 0; }
    100% { transform: translateY(0); opacity: 1; }
}

.auth-logo {
    font-size: 2.5rem;
    color: var(--text-main);
    margin-bottom: 0.5rem;
    text-align: center;
}

.auth-subtitle {
    color: var(--text-muted);
    text-align: center;
    margin-bottom: 2rem;
    font-size: 0.95rem;
}

.auth-step {
    width: 100%;
    display: none;
    flex-direction: column;
    gap: 1.25rem;
}

.auth-step.active {
    display: flex;
    animation: fadeIn 0.4s ease;
}

@keyframes fadeIn {
    0% { opacity: 0; transform: scale(0.98); }
    100% { opacity: 1; transform: scale(1); }
}

.modern-input {
    width: 100%;
    padding: 1rem 1.25rem;
    background: var(--bg-sub-item);
    border: 1px solid var(--card-border);
    border-radius: 12px;
    color: var(--text-main);
    font-size: 1rem;
    outline: none;
    transition: all 0.3s ease;
    box-sizing: border-box;
}

.modern-input::placeholder {
    color: var(--text-muted);
}

.modern-input:focus {
    border-color: var(--accent-color);
    background: var(--bg-card-hover);
    box-shadow: 0 0 0 4px var(--accent-glow);
}

.modern-btn {
    width: 100%;
    padding: 1rem;
    border-radius: 12px;
    font-weight: 600;
    font-size: 1rem;
    cursor: pointer;
    transition: all 0.3s ease;
    border: none;
}

.primary-btn {
    background: var(--grad-premium);
    color: #fff;
    box-shadow: 0 4px 15px var(--accent-glow);
}

.primary-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px var(--accent-glow);
    filter: brightness(1.1);
}

.primary-btn:active {
    transform: translateY(0);
}

.secondary-btn {
    background: transparent;
    color: var(--text-muted);
    margin-top: -0.5rem;
}

.secondary-btn:hover {
    color: var(--text-main);
    background: transparent;
}

.pin-instruction {
    color: var(--text-muted);
    text-align: center;
    font-size: 0.9rem;
}

.pin-input {
    text-align: center;
    letter-spacing: 0.5rem;
    font-size: 1.5rem;
    font-weight: 700;
}

.auth-message {
    margin-top: 1.5rem;
    text-align: center;
    font-size: 0.9rem;
    min-height: 1.2rem;
    color: #fca5a5; /* error color default */
}

.auth-message.success {
    color: #86efac;
}