/* ===================================
   AUTH PAGES STYLING
   Login & Register pages
   =================================== */

   .auth-container {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-lg);
    position: relative;
}

/* Background grain effect */
.auth-container::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    opacity: 0.03;
    background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 400 400' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noiseFilter'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noiseFilter)'/%3E%3C/svg%3E");
    pointer-events: none;
    z-index: 0;
}

/* Back Link */
.back-link {
    position: absolute;
    top: var(--spacing-lg);
    left: var(--spacing-lg);
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--text-secondary);
    font-size: 0.9375rem;
    font-weight: 500;
    transition: color var(--transition-fast);
    z-index: 10;
}

.back-link:hover {
    color: var(--text-primary);
}

/* Auth Box */
.auth-box {
    width: 100%;
    max-width: 400px;
    background: var(--bg-secondary);
    border: 1px solid var(--border-primary);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    position: relative;
    z-index: 2;
    animation: fadeInUp 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Header */
.auth-header {
    text-align: center;
    margin-bottom: var(--spacing-xl);
}

.auth-logo {
    display: inline-flex;
    align-items: center;
    gap: 0.75rem;
    font-family: var(--font-display);
    font-size: 1.75rem;
    font-weight: 800;
    margin-bottom: var(--spacing-md);
}

.auth-title {
    font-family: var(--font-display);
    font-size: 1.75rem;
    font-weight: 700;
    margin-bottom: var(--spacing-xs);
    letter-spacing: -0.02em;
}

.auth-subtitle {
    color: var(--text-secondary);
    font-size: 0.9375rem;
}

/* Form */
.auth-form {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.form-group label {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--text-primary);
}

.form-group input {
    width: 100%;
    padding: 0.875rem 1rem;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-primary);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    font-size: 0.9375rem;
    font-family: var(--font-body);
    transition: all var(--transition-fast);
    outline: none;
}

.form-group input:focus {
    border-color: var(--accent-primary);
    background: var(--bg-primary);
}

.form-group input::placeholder {
    color: var(--text-tertiary);
}

.form-hint {
    font-size: 0.8125rem;
    color: var(--text-tertiary);
}

/* Error Message */
.error-message {
    padding: 0.875rem 1rem;
    background: rgba(239, 68, 68, 0.1);
    border: 1px solid rgba(239, 68, 68, 0.3);
    border-radius: var(--radius-sm);
    color: #fca5a5;
    font-size: 0.875rem;
    margin-bottom: var(--spacing-md);
    animation: shake 0.4s cubic-bezier(0.36, 0.07, 0.19, 0.97);
}

/* Auth Button */
.btn-auth-primary {
    width: 100%;
    padding: 0.875rem;
    background: var(--text-primary);
    color: var(--bg-primary);
    border: none;
    border-radius: var(--radius-sm);
    font-weight: 700;
    font-size: 0.9375rem;
    cursor: pointer;
    transition: all var(--transition-fast);
    margin-top: var(--spacing-xs);
}

.btn-auth-primary:hover {
    transform: translateY(-1px);
    box-shadow: 0 8px 20px rgba(255, 255, 255, 0.1);
}

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

/* Divider */
.auth-divider {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    margin: var(--spacing-lg) 0;
    color: var(--text-tertiary);
    font-size: 0.875rem;
}

.auth-divider::before,
.auth-divider::after {
    content: '';
    flex: 1;
    height: 1px;
    background: var(--border-primary);
}

/* Footer */
.auth-footer {
    text-align: center;
    color: var(--text-secondary);
    font-size: 0.9375rem;
}

.auth-footer p {
    display: inline;
    margin-right: 0.25rem;
}

.link-accent {
    color: var(--accent-primary);
    font-weight: 600;
    transition: color var(--transition-fast);
}

.link-accent:hover {
    color: var(--accent-hover);
}

.auth-footer-text {
    margin-top: var(--spacing-lg);
    text-align: center;
    color: var(--text-tertiary);
    font-size: 0.8125rem;
    max-width: 400px;
    line-height: 1.5;
    position: relative;
    z-index: 2;
}

/* ===================================
   ANIMATIONS
   =================================== */
@keyframes shake {
    0%, 100% {
        transform: translateX(0);
    }
    10%, 30%, 50%, 70%, 90% {
        transform: translateX(-4px);
    }
    20%, 40%, 60%, 80% {
        transform: translateX(4px);
    }
}

/* ===================================
   RESPONSIVE
   =================================== */
@media (max-width: 640px) {
    .auth-container {
        padding: var(--spacing-md);
    }
    
    .back-link {
        top: var(--spacing-md);
        left: var(--spacing-md);
    }
    
    .auth-box {
        padding: var(--spacing-lg);
    }
    
    .auth-title {
        font-size: 1.5rem;
    }
    
    .auth-logo {
        font-size: 1.5rem;
    }
}