/* === WELCOME SECTION === */
.welcome-section {
    background: linear-gradient(135deg, var(--whatsapp-primary), var(--whatsapp-secondary));
    position: relative;
    overflow: hidden;
}

.welcome-section::before {
    content: '';
    position: absolute;
    inset: 0;
    background-image: 
        radial-gradient(circle at 20% 50%, rgba(255, 255, 255, 0.08) 1px, transparent 1px),
        radial-gradient(circle at 80% 20%, rgba(255, 255, 255, 0.06) 1px, transparent 1px),
        radial-gradient(circle at 40% 80%, rgba(255, 255, 255, 0.04) 1px, transparent 1px);
    background-size: 50px 50px, 80px 80px, 120px 120px;
    animation: float 30s ease-in-out infinite;
}

.welcome-section::after {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(45deg, transparent 30%, rgba(255, 255, 255, 0.02) 50%, transparent 70%);
    animation: shimmer 8s ease-in-out infinite;
}

@keyframes float {
    0%, 100% { transform: translateY(0) rotate(0deg); }
    33% { transform: translateY(-20px) rotate(1deg); }
    66% { transform: translateY(-10px) rotate(-1deg); }
}

@keyframes shimmer {
    0%, 100% { opacity: 0; }
    50% { opacity: 1; }
}

.welcome-content {
    display: flex;
    flex-direction: column;
    justify-content: center;
    padding: clamp(2rem, 5vw, 4rem);
    height: 100%;
    color: white;
    position: relative;
    z-index: 2;
    max-width: 600px;
    margin: 0 auto;
}

.logo-container {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-xxl);
}

.logo-icon {
    font-size: clamp(2.5rem, 4vw, 3.5rem);
    background: linear-gradient(45deg, #ffffff, rgba(255, 255, 255, 0.8));
    background-clip: text;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    filter: drop-shadow(0 4px 12px rgba(0, 0, 0, 0.2));
    animation: pulse 4s ease-in-out infinite;
}

.logo-text {
    font-size: clamp(1.8rem, 3vw, 2.5rem);
    font-weight: 700;
    background: linear-gradient(45deg, #ffffff, rgba(255, 255, 255, 0.9));
    background-clip: text;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    text-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
    margin: 0;
    line-height: 1.2;
}

.welcome-title {
    font-size: clamp(1.8rem, 3vw, 2.2rem);
    font-weight: 600;
    margin-bottom: var(--spacing-lg);
    line-height: 1.3;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.welcome-description {
    font-size: clamp(1rem, 1.5vw, 1.1rem);
    line-height: 1.7;
    margin-bottom: var(--spacing-xxl);
    color: rgba(255, 255, 255, 0.92);
    text-shadow: 0 1px 2px rgba(0, 0, 0, 0.1);
}

.features-list {
    display: grid;
    gap: var(--spacing-md);
}

.feature-item {
    display: flex;
    align-items: center;
    padding: var(--spacing-lg);
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: var(--radius-xl);
    backdrop-filter: blur(20px);
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    cursor: default;
}

.feature-item:hover {
    background: rgba(255, 255, 255, 0.15);
    transform: translateX(8px) scale(1.02);
    border-color: rgba(255, 255, 255, 0.3);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
}

.feature-icon {
    font-size: 1.5rem;
    margin-right: var(--spacing-lg);
    min-width: 40px;
    text-align: center;
    background: rgba(255, 255, 255, 0.15);
    padding: 10px;
    border-radius: var(--radius-md);
    backdrop-filter: blur(10px);
}

.feature-item h4 {
    font-size: 1.1rem;
    font-weight: 600;
    margin: 0 0 0.25rem 0;
    line-height: 1.3;
}

.feature-item p {
    font-size: 0.9rem;
    margin: 0;
    color: rgba(255, 255, 255, 0.85);
    line-height: 1.4;
}

/* === LOGIN SECTION === */
.login-section {
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-primary);
    padding: var(--spacing-lg);
    min-height: 100vh;
    position: relative;
}

.login-section::before {
    content: '';
    position: absolute;
    inset: 0;
    background: 
        radial-gradient(circle at 30% 20%, rgba(37, 211, 102, 0.05) 0%, transparent 50%),
        radial-gradient(circle at 80% 80%, rgba(18, 140, 126, 0.05) 0%, transparent 50%);
    pointer-events: none;
}

.login-container {
    width: 100%;
    max-width: 420px;
    position: relative;
    z-index: 1;
}

.mobile-logo {
    text-align: center;
    margin-bottom: var(--spacing-xl);
    animation: fadeInDown 0.8s ease-out;
}

.mobile-logo i {
    font-size: 3.5rem;
    background: linear-gradient(135deg, var(--whatsapp-primary), var(--whatsapp-secondary));
    background-clip: text;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    animation: pulse 3s ease-in-out infinite;
}

.mobile-logo h2 {
    font-weight: 600;
    margin-top: var(--spacing-md);
    background: linear-gradient(135deg, var(--text-primary), var(--text-secondary));
    background-clip: text;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.login-form-wrapper {
    background: var(--bg-secondary);
    padding: clamp(2rem, 4vw, 3rem);
    border-radius: var(--radius-xl);
    box-shadow: 
        0 20px 40px rgba(0, 0, 0, 0.1),
        0 4px 12px rgba(0, 0, 0, 0.05),
        inset 0 1px 0 rgba(255, 255, 255, 0.1);
    border: 1px solid var(--border-color);
    position: relative;
    overflow: hidden;
    animation: fadeInUp 0.8s ease-out;
}

.login-form-wrapper::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--whatsapp-primary), transparent);
    opacity: 0.6;
}

.login-title {
    font-size: 1.75rem;
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
    text-align: center;
    background: linear-gradient(135deg, var(--text-primary), var(--whatsapp-primary));
    background-clip: text;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.login-subtitle {
    color: var(--text-secondary);
    text-align: center;
    margin-bottom: 0;
    font-size: 0.95rem;
}

.login-form {
    margin-top: var(--spacing-xl);
}

.form-label {
    font-weight: 500;
    margin-bottom: var(--spacing-sm);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    color: var(--text-primary);
    font-size: 0.9rem;
}

.form-label i {
    color: var(--whatsapp-primary);
    font-size: 0.85rem;
}

.form-control {
    padding: var(--spacing-lg);
    font-size: 1rem;
    border: 2px solid var(--border-color);
    border-radius: var(--radius-lg);
    background: var(--bg-primary);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
}

.form-control:focus {
    outline: none;
    border-color: var(--whatsapp-primary);
    background: var(--bg-primary);
    box-shadow: 
        0 0 0 3px rgba(37, 211, 102, 0.1),
        0 4px 12px rgba(37, 211, 102, 0.15);
    transform: translateY(-1px);
}

.form-control:hover:not(:focus) {
    border-color: var(--whatsapp-secondary);
}

.password-input-wrapper {
    position: relative;
}

.password-toggle {
    position: absolute;
    right: 12px;
    top: 50%;
    transform: translateY(-50%);
    background: none;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    padding: var(--spacing-sm);
    border-radius: var(--radius-sm);
    transition: all var(--transition-fast);
    font-size: 0.9rem;
}

.password-toggle:hover {
    color: var(--whatsapp-primary);
    background: var(--bg-tertiary);
    transform: translateY(-50%) scale(1.1);
}

.form-check {
    margin-bottom: 0;
}

.form-check-input {
    border-radius: var(--radius-sm);
    border: 2px solid var(--border-color);
    transition: all var(--transition-fast);
}

.form-check-input:checked {
    background-color: var(--whatsapp-primary);
    border-color: var(--whatsapp-primary);
}

.form-check-input:focus {
    box-shadow: 0 0 0 3px rgba(37, 211, 102, 0.1);
}

.form-check-label {
    color: var(--text-primary);
    cursor: pointer;
    font-size: 0.9rem;
    user-select: none;
}

.forgot-password-link {
    color: var(--whatsapp-primary);
    text-decoration: none;
    font-size: 0.9rem;
    font-weight: 500;
    transition: all var(--transition-fast);
    position: relative;
}

.forgot-password-link::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--whatsapp-primary);
    transition: width var(--transition-fast);
}

.forgot-password-link:hover {
    color: var(--whatsapp-secondary);
    transform: translateY(-1px);
}

.forgot-password-link:hover::after {
    width: 100%;
}

.login-btn {
    padding: var(--spacing-lg);
    font-size: 1.1rem;
    font-weight: 600;
    border: none;
    border-radius: var(--radius-lg);
    background: linear-gradient(135deg, var(--whatsapp-primary), var(--whatsapp-secondary));
    color: white;
    box-shadow: 
        0 8px 24px rgba(37, 211, 102, 0.3),
        0 4px 12px rgba(37, 211, 102, 0.2);
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    overflow: hidden;
    cursor: pointer;
}

.login-btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    transition: left 0.6s ease;
}

.login-btn:hover {
    transform: translateY(-2px) scale(1.02);
    box-shadow: 
        0 12px 32px rgba(37, 211, 102, 0.4),
        0 8px 16px rgba(37, 211, 102, 0.3);
    background: linear-gradient(135deg, var(--whatsapp-secondary), var(--whatsapp-primary));
}

.login-btn:hover::before {
    left: 100%;
}

.login-btn:active {
    transform: translateY(0) scale(0.98);
}

.login-btn:disabled {
    opacity: 0.7;
    cursor: not-allowed;
    transform: none !important;
    box-shadow: none;
}

.demo-text {
    color: var(--text-secondary);
    margin-bottom: var(--spacing-md);
    font-size: 0.9rem;
    text-align: center;
}

.login-footer {
    text-align: center;
    margin-top: var(--spacing-xl);
    animation: fadeIn 1s ease-out 0.5s both;
}

.copyright {
    font-size: 0.8rem;
    color: var(--text-muted);
    margin-bottom: var(--spacing-sm);
}

.footer-links {
    display: flex;
    justify-content: center;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--spacing-md);
}

.footer-link {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.8rem;
    font-weight: 500;
    transition: all var(--transition-fast);
    position: relative;
}

.footer-link::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 50%;
    transform: translateX(-50%);
    width: 0;
    height: 1px;
    background: var(--whatsapp-primary);
    transition: width var(--transition-fast);
}

.footer-link:hover {
    color: var(--whatsapp-primary);
    transform: translateY(-1px);
}

.footer-link:hover::after {
    width: 100%;
}

.separator {
    color: var(--text-muted);
    font-size: 0.8rem;
    user-select: none;
}

/* === MODAL STYLES === */
.modal-content {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-xl);
    box-shadow: 
        0 25px 50px rgba(0, 0, 0, 0.15),
        0 10px 25px rgba(0, 0, 0, 0.1);
    overflow: hidden;
}

.modal-header {
    background: linear-gradient(135deg, var(--bg-primary), var(--bg-secondary));
    border-bottom: 1px solid var(--border-color);
    padding: var(--spacing-lg) var(--spacing-xl);
}

.modal-title {
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.modal-title i {
    color: var(--whatsapp-primary);
}

.modal-body {
    padding: var(--spacing-xl);
}

.modal-footer {
    background: var(--bg-primary);
    border-top: 1px solid var(--border-color);
    padding: var(--spacing-lg) var(--spacing-xl);
}

.btn-close {
    filter: var(--bs-btn-close-white-filter, none);
    opacity: 0.7;
    transition: all var(--transition-fast);
}

.btn-close:hover {
    opacity: 1;
    transform: scale(1.1);
}

[data-theme="dark"] .btn-close {
    filter: invert(1) grayscale(100%) brightness(200%);
}

/* === ANIMATIONS === */
@keyframes fadeInDown {
    from {
        opacity: 0;
        transform: translateY(-30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

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

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

.error-shake {
    animation: shake 0.6s cubic-bezier(0.36, 0.07, 0.19, 0.97);
}

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

.success-bounce {
    animation: bounce 0.8s cubic-bezier(0.68, -0.55, 0.265, 1.55);
}

@keyframes bounce {
    0% { transform: scale(1); }
    50% { transform: scale(1.05); }
    100% { transform: scale(1); }
}

.is-invalid {
    border-color: var(--danger-color) !important;
    box-shadow: 0 0 0 3px rgba(220, 53, 69, 0.1) !important;
    animation: shake 0.5s ease-in-out;
}

.invalid-feedback {
    display: block;
    color: var(--danger-color);
    font-size: 0.8rem;
    margin-top: var(--spacing-xs);
    font-weight: 500;
}

/* === RESPONSIVE DESIGN === */
@media (max-width: 1200px) {
    .welcome-content {
        padding: clamp(1.5rem, 4vw, 3rem);
    }
    
    .features-list {
        gap: var(--spacing-sm);
    }
}

@media (max-width: 991.98px) {
    .login-section {
        min-height: 100vh;
        padding: var(--spacing-md);
    }
    
    .login-container {
        max-width: 100%;
    }
    
    .mobile-logo {
        margin-bottom: var(--spacing-lg);
    }
    
    .login-form-wrapper {
        padding: clamp(1.5rem, 4vw, 2rem);
    }
}

@media (max-width: 575.98px) {
    .login-section::before {
        display: none;
    }
    
    .login-container {
        padding: var(--spacing-sm);
    }
    
    .login-form-wrapper {
        padding: var(--spacing-lg);
        border-radius: var(--radius-lg);
    }
    
    .form-control {
        padding: var(--spacing-md);
        font-size: 16px; /* Prevent zoom on iOS */
    }
    
    .login-btn {
        padding: var(--spacing-md);
        min-height: 48px;
    }
    
    .footer-links {
        flex-direction: column;
        gap: var(--spacing-xs);
    }
    
    .separator {
        display: none;
    }
    
    .mobile-logo i {
        font-size: 2.5rem;
    }
    
    .mobile-logo h2 {
        font-size: 1.5rem;
    }
}

@media (max-width: 480px) {
    .welcome-content {
        padding: var(--spacing-lg);
    }
    
    .feature-item {
        padding: var(--spacing-md);
        flex-direction: column;
        text-align: center;
        gap: var(--spacing-sm);
    }
    
    .feature-icon {
        margin-right: 0;
        margin-bottom: var(--spacing-xs);
    }
}

/* === ACCESSIBILITY === */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
    
    .welcome-section::before {
        animation: none;
    }
    
    .logo-icon {
        animation: none;
    }
}

@media (prefers-contrast: high) {
    .form-control:focus {
        box-shadow: 0 0 0 3px #000;
    }
    
    .login-btn {
        border: 2px solid #000;
    }
}

/* === PRINT STYLES === */
@media print {
    .welcome-section,
    .theme-toggle,
    .login-footer {
        display: none !important;
    }
    
    .login-section {
        background: white !important;
        color: black !important;
    }
    
    .login-form-wrapper {
        box-shadow: none !important;
        border: 1px solid #ccc !important;
    }
}