/* Auth Container */
.auth-container {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 2rem 1rem;
}

.auth-card {
    width: 100%;
    max-width: 420px;
    background: var(--glass);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid var(--glass-border);
    border-radius: 20px;
    padding: 2.5rem;
    box-shadow: var(--shadow-lg), 0 0 40px var(--accent-glow);
    animation: authCardIn 0.6s cubic-bezier(0.34, 1.56, 0.64, 1);
}

@keyframes authCardIn {
    from { opacity: 0; transform: translateY(30px) scale(0.95); }
    to { opacity: 1; transform: translateY(0) scale(1); }
}

/* Logo */
.auth-logo {
    text-align: center;
    margin-bottom: 2rem;
}

.auth-logo h1 {
    font-size: 2rem;
    font-weight: 800;
    letter-spacing: -1px;
    background: linear-gradient(135deg, var(--text) 0%, var(--accent) 50%, var(--text) 100%);
    background-size: 200% 200%;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    animation: shimmer 3s ease-in-out infinite;
}

.auth-logo .accent {
    -webkit-text-fill-color: var(--accent);
    text-shadow: 0 0 20px var(--accent-glow);
}

@keyframes shimmer {
    0%, 100% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
}

.auth-tagline {
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-top: 0.25rem;
}

/* Form */
.auth-form {
    display: flex;
    flex-direction: column;
    gap: 1.1rem;
    align-items: center;
}

.auth-title {
    font-size: 1.25rem;
    font-weight: 700;
    text-align: center;
    margin-bottom: 0.25rem;
}

.auth-subtitle {
    font-size: 0.88rem;
    color: var(--text-secondary);
    text-align: center;
    line-height: 1.4;
}

/* Google Sign-In Button */
.google-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.75rem;
    width: 100%;
    padding: 0.85rem 1.2rem;
    margin-top: 0.5rem;
    font-size: 0.95rem;
    font-weight: 600;
    font-family: inherit;
    color: var(--text);
    background: var(--glass);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius);
    cursor: pointer;
    transition: all var(--transition);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
}

.google-btn:hover {
    border-color: var(--accent);
    box-shadow: 0 0 0 3px var(--accent-glow), var(--shadow-md);
    transform: translateY(-1px);
}

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

.google-btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none;
}

.google-icon {
    flex-shrink: 0;
}

/* Error message */
.auth-error {
    font-size: 0.82rem;
    color: #ef4444;
    text-align: center;
    min-height: 1.2em;
    animation: shakeIn 0.3s ease;
}

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

/* Logged-in user badge (for other pages) */
.user-badge {
    position: fixed;
    top: 1rem;
    left: 1rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    z-index: 900;
    animation: fadeIn 0.8s ease-out 0.6s both;
}

.history-toggle {
    display: flex;
    align-items: center;
    gap: 0.4rem;
    padding: 0.4rem 0.75rem;
    font-size: 0.78rem;
    font-weight: 600;
    font-family: inherit;
    color: var(--text-secondary);
    background: none;
    border: 1px solid var(--glass-border);
    border-radius: 8px;
    cursor: pointer;
    transition: all var(--transition);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
}

.history-toggle:hover {
    color: var(--accent);
    border-color: var(--accent);
    box-shadow: 0 0 0 2px var(--accent-glow);
}

.user-avatar {
    width: 34px;
    height: 34px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--accent), var(--accent-hover));
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 0.85rem;
    text-transform: uppercase;
    box-shadow: 0 2px 10px var(--accent-glow);
}

.user-avatar-img {
    width: 34px;
    height: 34px;
    border-radius: 50%;
    object-fit: cover;
    box-shadow: 0 2px 10px var(--accent-glow);
}

.user-name {
    font-size: 0.82rem;
    font-weight: 600;
    color: var(--text);
}

.logout-btn {
    background: none;
    border: 1px solid var(--glass-border);
    border-radius: 8px;
    color: var(--text-secondary);
    font-size: 0.75rem;
    padding: 0.3rem 0.6rem;
    cursor: pointer;
    font-family: inherit;
    transition: all var(--transition);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
}

.logout-btn:hover {
    border-color: #ef4444;
    color: #ef4444;
    box-shadow: 0 0 10px rgba(239, 68, 68, 0.2);
}

/* Responsive */
@media (max-width: 640px) {
    .user-badge {
        top: 0.5rem;
        left: 0.5rem;
    }

    .user-name {
        display: none;
    }

    .logout-btn {
        font-size: 0.68rem;
        padding: 0.2rem 0.4rem;
    }

    .history-toggle span {
        display: none;
    }
}

@media (max-width: 480px) {
    .auth-card {
        padding: 2rem 1.5rem;
        border-radius: 16px;
    }

    .auth-logo h1 {
        font-size: 1.7rem;
    }
}