/* Reset dan Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Inter', sans-serif;
    background: linear-gradient(135deg, #f8fafc 0%, #e2e8f0 100%);
    min-height: 100vh;
    color: #1e293b;
    line-height: 1.6;
}

.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Header Section */
.main-header {
    background: linear-gradient(135deg, #1e40af 0%, #3b82f6 100%);
    color: white;
    padding: 60px 0;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.main-header::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><circle cx="20" cy="20" r="1" fill="%23ffffff" opacity="0.1"/><circle cx="80" cy="40" r="1" fill="%23ffffff" opacity="0.1"/><circle cx="40" cy="80" r="1" fill="%23ffffff" opacity="0.1"/></svg>') repeat;
    animation: float 30s infinite linear;
}

@keyframes float {
    0% { transform: translateX(0) translateY(0); }
    100% { transform: translateX(-100px) translateY(-100px); }
}

.logo {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 16px;
    margin-bottom: 16px;
    position: relative;
    z-index: 1;
}

.logo i {
    font-size: 3rem;
    color: #fbbf24;
    filter: drop-shadow(0 4px 8px rgba(0, 0, 0, 0.1));
}

.logo h1 {
    font-size: 3rem;
    font-weight: 700;
    letter-spacing: -2px;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.tagline {
    font-size: 1.25rem;
    opacity: 0.95;
    font-weight: 400;
    position: relative;
    z-index: 1;
    max-width: 600px;
    margin: 0 auto;
}

/* Main Content Layout */
.main-content {
    display: grid;
    grid-template-columns: 1fr 480px;
    gap: 60px;
    padding: 80px 0;
    align-items: start;
    max-width: 1200px;
    margin: 0 auto;
}

/* Features Section */
.features-section {
    background: white;
    border-radius: 20px;
    padding: 40px;
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.08);
    border: 1px solid #e2e8f0;
}

.features-section h3 {
    font-size: 2rem;
    font-weight: 700;
    color: #1e293b;
    margin-bottom: 32px;
    text-align: center;
}

.features-list {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.feature-item {
    display: flex;
    align-items: flex-start;
    gap: 20px;
    padding: 24px;
    background: #f8fafc;
    border-radius: 16px;
    border: 1px solid #e2e8f0;
    transition: all 0.3s ease;
}

.feature-item:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.1);
    border-color: #3b82f6;
}

.feature-icon {
    flex-shrink: 0;
    width: 56px;
    height: 56px;
    background: linear-gradient(135deg, #3b82f6 0%, #1e40af 100%);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 4px 12px rgba(59, 130, 246, 0.3);
}

.feature-icon i {
    font-size: 1.5rem;
    color: white;
}

.feature-content h4 {
    font-size: 1.25rem;
    font-weight: 600;
    color: #1e293b;
    margin-bottom: 8px;
}

.feature-content p {
    font-size: 0.95rem;
    color: #64748b;
    line-height: 1.6;
}

/* Auth Container */
.auth-container {
    background: white;
    border-radius: 20px;
    padding: 40px;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
    border: 1px solid #e2e8f0;
    position: sticky;
    top: 40px;
    backdrop-filter: blur(10px);
    background: rgba(255, 255, 255, 0.95);
}

.form-section {
    display: none;
    animation: fadeIn 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

.form-section.active {
    display: block;
}

@keyframes fadeIn {
    from { 
        opacity: 0; 
        transform: translateY(20px) scale(0.95); 
    }
    to { 
        opacity: 1; 
        transform: translateY(0) scale(1); 
    }
}

.form-section h2 {
    font-size: 1.75rem;
    font-weight: 700;
    margin-bottom: 32px;
    color: #1e293b;
    text-align: center;
}

/* Form Styles */
.auth-form {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.input-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
}

.input-group {
    position: relative;
    display: flex;
    align-items: center;
}

.input-group i {
    position: absolute;
    left: 16px;
    color: #64748b;
    font-size: 1rem;
    z-index: 1;
}

.input-group input {
    width: 100%;
    padding: 18px 16px 18px 48px;
    border: 2px solid #e2e8f0;
    border-radius: 14px;
    font-size: 1rem;
    transition: all 0.3s ease;
    background: #f8fafc;
    font-family: inherit;
    font-weight: 500;
}

.input-group input:focus {
    outline: none;
    border-color: #3b82f6;
    background: white;
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

.input-group input::placeholder {
    color: #94a3b8;
}

.toggle-password {
    position: absolute;
    right: 16px;
    background: none;
    border: none;
    color: #64748b;
    cursor: pointer;
    padding: 8px;
    border-radius: 8px;
    transition: all 0.3s ease;
    z-index: 10;
    display: flex;
    align-items: center;
    justify-content: center;
    min-width: 32px;
    min-height: 32px;
}

.toggle-password:hover {
    color: #3b82f6;
    background: #f1f5f9;
}

.toggle-password:focus {
    outline: 2px solid #3b82f6;
    outline-offset: 2px;
}

.toggle-password i {
    font-size: 1rem;
    pointer-events: none;
}

/* Form Options */
.form-options {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin: 12px 0;
    gap: 16px;
}

.checkbox-container {
    display: flex;
    align-items: center;
    cursor: pointer;
    font-size: 0.9rem;
    color: #64748b;
    gap: 8px;
}

.checkbox-container input {
    display: none;
}

.checkmark {
    width: 20px;
    height: 20px;
    border: 2px solid #cbd5e1;
    border-radius: 6px;
    position: relative;
    transition: all 0.3s ease;
    flex-shrink: 0;
}

.checkbox-container input:checked + .checkmark {
    background: #3b82f6;
    border-color: #3b82f6;
}

.checkbox-container input:checked + .checkmark::after {
    content: '✓';
    position: absolute;
    top: -1px;
    left: 3px;
    color: white;
    font-size: 14px;
    font-weight: bold;
}

.forgot-password {
    color: #3b82f6;
    text-decoration: none;
    font-size: 0.9rem;
    font-weight: 500;
    transition: color 0.3s ease;
}

.forgot-password:hover {
    color: #1e40af;
}

/* Buttons */
.btn-primary {
    background: linear-gradient(135deg, #3b82f6 0%, #1e40af 100%);
    color: white;
    border: none;
    padding: 18px 32px;
    border-radius: 14px;
    font-size: 1.05rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    margin-top: 20px;
    font-family: inherit;
    box-shadow: 0 6px 20px rgba(59, 130, 246, 0.4);
    position: relative;
    overflow: hidden;
}

.btn-primary::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 0.5s;
}

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

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 30px rgba(59, 130, 246, 0.5);
}

.btn-primary:active {
    transform: translateY(-1px);
}

/* Form Footer */
.form-footer {
    text-align: center;
    margin-top: 32px;
    padding-top: 24px;
    border-top: 1px solid #e2e8f0;
}

.form-footer p {
    color: #64748b;
    font-size: 0.95rem;
    font-weight: 500;
}

.form-footer a {
    color: #3b82f6;
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s ease;
    padding: 4px 8px;
    border-radius: 6px;
}

.form-footer a:hover {
    color: #1e40af;
    background: rgba(59, 130, 246, 0.1);
}

/* Loading Animation */
.loading {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 3px solid rgba(255, 255, 255, 0.3);
    border-radius: 50%;
    border-top-color: white;
    animation: spin 1s ease-in-out infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

/* Success/Error Messages */
.message {
    padding: 16px 20px;
    border-radius: 12px;
    margin-bottom: 24px;
    font-size: 0.95rem;
    font-weight: 500;
}

.message.success {
    background: #dcfce7;
    color: #166534;
    border: 1px solid #bbf7d0;
}

.message.error {
    background: #fef2f2;
    color: #dc2626;
    border: 1px solid #fecaca;
}

/* Field Error Messages */
.field-error {
    color: #dc2626 !important;
    font-size: 0.85rem !important;
    margin-top: -4px !important;
    margin-bottom: 16px !important;
    padding-left: 48px !important;
    display: block !important;
    width: 100% !important;
    font-weight: 500;
}

.input-group {
    margin-bottom: 0;
}

.input-group input.error {
    border-color: #dc2626 !important;
    background-color: #fef2f2 !important;
}

.input-group input.error:focus {
    box-shadow: 0 0 0 3px rgba(220, 38, 38, 0.1) !important;
}

/* Responsive Design */
@media (max-width: 1024px) {
    .main-content {
        grid-template-columns: 1fr;
        gap: 40px;
        padding: 60px 0;
        max-width: 800px;
    }
    
    .auth-container {
        position: static;
        max-width: 500px;
        margin: 0 auto;
    }
}

/* Footer */
.app-footer {
    text-align: center;
    padding: 2rem;
    color: #64748b;
    font-size: 0.9rem;
    border-top: 1px solid #e2e8f0;
    margin-top: 2rem;
    background: rgba(255, 255, 255, 0.8);
}

@media (max-width: 768px) {
    .container {
        padding: 0 16px;
    }
    
    .main-header {
        padding: 40px 0;
    }
    
    .logo {
        flex-direction: column;
        gap: 12px;
    }
    
    .logo h1 {
        font-size: 2.5rem;
    }
    
    .logo i {
        font-size: 2.5rem;
    }
    
    .tagline {
        font-size: 1.1rem;
    }
    
    .main-content {
        padding: 40px 0;
        gap: 32px;
    }
    
    .features-section,
    .auth-container {
        padding: 32px 24px;
        border-radius: 16px;
    }
    
    .input-row {
        grid-template-columns: 1fr;
        gap: 20px;
    }
    
    .form-options {
        flex-direction: column;
        gap: 16px;
        align-items: flex-start;
    }
    
    .feature-item {
        padding: 20px;
    }
    
    .feature-icon {
        width: 48px;
        height: 48px;
    }
    
    .feature-icon i {
        font-size: 1.25rem;
    }
    
    .auth-form {
        gap: 24px;
    }
    
    .form-section h2 {
        font-size: 1.5rem;
        margin-bottom: 28px;
    }
}

@media (max-width: 480px) {
    .main-header {
        padding: 32px 0;
    }
    
    .logo h1 {
        font-size: 2rem;
    }
    
    .logo i {
        font-size: 2rem;
    }
    
    .features-section,
    .auth-container {
        padding: 24px 20px;
        border-radius: 16px;
    }
    
    .input-group input {
        padding: 14px 14px 14px 44px;
    }
    
    .btn-primary {
        padding: 14px 28px;
    }
    
    .feature-item {
        flex-direction: column;
        text-align: center;
        gap: 16px;
    }
}

/* Smooth Transitions */
* {
    transition: color 0.3s cubic-bezier(0.4, 0, 0.2, 1), 
                background-color 0.3s cubic-bezier(0.4, 0, 0.2, 1), 
                border-color 0.3s cubic-bezier(0.4, 0, 0.2, 1), 
                transform 0.3s cubic-bezier(0.4, 0, 0.2, 1),
                box-shadow 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}