* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary-color: #0066ff;
    --primary-dark: #0052cc;
    --primary-light: #3385ff;
    --secondary-color: #f8f9fc;
    --dark-bg: #ffffff;
    --darker-bg: #f8f9fc;
    --light-text: #ffffff;
    --text-primary: #111827;
    --text-secondary: #374151;
    --text-tertiary: #6b7280;
    --gray-text: #6b7280;
    --gray-light: #e5e7eb;
    --error-color: #ef4444;
    --success-color: #10b981;
    --warning-color: #f59e0b;
    --border-color: #e5e7eb;
    --hover-bg: #f9fafb;
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    background: var(--darker-bg);
    color: var(--text-primary);
    overflow: hidden;
}

.login-container {
    display: flex;
    height: 100vh;
    position: relative;
}

/* LEFT SIDE - SLIDER */
.login-left {
    flex: 1;
    position: relative;
    overflow: hidden;
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
}

.slider-wrapper {
    width: 100%;
    height: 100%;
    position: relative;
}

.slider {
    width: 100%;
    height: 100%;
    position: relative;
}

.slide {
    position: absolute;
    width: 100%;
    height: 100%;
    background-size: cover;
    background-position: center;
    opacity: 0;
    transition: opacity 1s ease-in-out;
    display: flex;
    align-items: center;
    justify-content: center;
}

.slide.active {
    opacity: 1;
    z-index: 1;
}

.slide::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, 
        rgba(0, 102, 255, 0.9) 0%, 
        rgba(0, 82, 204, 0.95) 100%);
}

.slide-content {
    position: relative;
    z-index: 2;
    text-align: center;
    padding: 60px;
    max-width: 600px;
    animation: slideUp 0.8s ease-out;
}

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

.slide-icon {
    width: 100px;
    height: 100px;
    margin: 0 auto 30px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    backdrop-filter: blur(10px);
    border: 2px solid rgba(255, 255, 255, 0.2);
    animation: iconFloat 3s ease-in-out infinite;
}

@keyframes iconFloat {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-10px); }
}

.slide-icon i {
    font-size: 48px;
    color: white;
}

.slide-content h2 {
    font-size: 42px;
    font-weight: 700;
    margin-bottom: 20px;
    color: white;
    text-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
}

.slide-content p {
    font-size: 18px;
    color: rgba(255, 255, 255, 0.9);
    line-height: 1.6;
    text-shadow: 0 2px 10px rgba(0, 0, 0, 0.2);
}

.slider-dots {
    position: absolute;
    bottom: 50px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 12px;
    z-index: 10;
}

.dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.3);
    cursor: pointer;
    transition: all 0.3s ease;
    border: 2px solid transparent;
}

.dot:hover {
    background: rgba(255, 255, 255, 0.5);
}

.dot.active {
    background: white;
    width: 40px;
    border-radius: 6px;
}

/* RIGHT SIDE - LOGIN FORM */
.login-right {
    width: 550px;
    background: var(--dark-bg);
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    box-shadow: var(--shadow-xl);
}

.login-right::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(180deg, 
        rgba(0, 102, 255, 0.03) 0%, 
        transparent 100%);
    pointer-events: none;
}

.login-form-container {
    width: 100%;
    max-width: 420px;
    padding: 40px;
    position: relative;
    z-index: 1;
}

.logo-section {
    text-align: center;
    margin-bottom: 50px;
}

.logo {
    width: 80px;
    height: 80px;
    margin: 0 auto 20px;
    background: var(--dark-bg);
    border-radius: 18px;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 8px 24px rgba(0, 102, 255, 0.18);
    animation: logoFloat 3s ease-in-out infinite;
    padding: 8px;
    border: 2px solid var(--border-color);
    max-width: 100%;
    box-sizing: border-box;
}

@keyframes logoFloat {
    0%, 100% { transform: translateY(0) rotate(0deg); }
    50% { transform: translateY(-5px) rotate(2deg); }
}

.logo i {
    font-size: 36px;
    color: white;
}

.logo-img {
    width: 100%;
    height: 100%;
    object-fit: contain;
    border-radius: 12px;
}

.logo-section h1 {
    font-size: 32px;
    font-weight: 700;
    margin-bottom: 8px;
    background: linear-gradient(135deg, var(--text-primary), var(--text-secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.tagline {
    font-size: 14px;
    color: var(--text-tertiary);
    font-weight: 400;
}

/* Language Selector */
.language-selector {
    margin-bottom: 30px;
    display: flex;
    justify-content: center;
}

.language-select {
    padding: 10px 16px;
    border: 2px solid var(--border-color);
    border-radius: 10px;
    background: var(--dark-bg);
    color: var(--text-primary);
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-fast);
    min-width: 180px;
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%23374151' d='M6 9L1 4h10z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 12px center;
    padding-right: 40px;
}

.language-select:hover {
    border-color: var(--primary-color);
    background-color: var(--hover-primary);
}

.language-select:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(0, 102, 255, 0.1);
}

.form-header {
    margin-bottom: 30px;
}

.form-header h2 {
    font-size: 28px;
    font-weight: 700;
    margin-bottom: 8px;
    color: var(--text-primary);
}

.form-header p {
    font-size: 15px;
    color: var(--text-tertiary);
}

.alert {
    padding: 14px 16px;
    border-radius: 12px;
    margin-bottom: 24px;
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 14px;
    animation: slideDown 0.3s ease-out;
}

@keyframes slideDown {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.alert-error {
    background: rgba(255, 68, 68, 0.1);
    border: 1px solid rgba(255, 68, 68, 0.3);
    color: var(--error-color);
}

.alert i {
    font-size: 18px;
}

.form-group {
    margin-bottom: 24px;
}

.form-group label {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 14px;
    font-weight: 500;
    color: var(--text-primary);
    margin-bottom: 10px;
}

.form-group label i {
    font-size: 16px;
    color: var(--primary-color);
}

.form-group input {
    width: 100%;
    padding: 14px 16px;
    background: var(--darker-bg);
    border: 2px solid var(--border-color);
    border-radius: 12px;
    color: var(--text-primary);
    font-size: 15px;
    transition: all 0.3s ease;
    font-family: inherit;
}

.form-group input:focus {
    outline: none;
    border-color: var(--primary-color);
    background: #ffffff;
    box-shadow: 0 0 0 4px rgba(0, 102, 255, 0.1);
}

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

.password-input {
    position: relative;
}

.toggle-password {
    position: absolute;
    right: 14px;
    top: 50%;
    transform: translateY(-50%);
    background: none;
    border: none;
    color: var(--text-tertiary);
    cursor: pointer;
    padding: 8px;
    transition: color 0.3s ease;
}

.toggle-password:hover {
    color: var(--text-primary);
}

.form-options {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 28px;
}

.checkbox-label {
    display: flex;
    align-items: center;
    gap: 10px;
    cursor: pointer;
    font-size: 14px;
    color: var(--text-secondary);
    user-select: none;
}

.checkbox-label input[type="checkbox"] {
    display: none;
}

.checkbox-custom {
    width: 20px;
    height: 20px;
    border: 2px solid var(--border-color);
    border-radius: 6px;
    position: relative;
    transition: all 0.3s ease;
}

.checkbox-label input:checked + .checkbox-custom {
    background: var(--primary-color);
    border-color: var(--primary-color);
}

.checkbox-label input:checked + .checkbox-custom::after {
    content: '✓';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    color: white;
    font-size: 12px;
    font-weight: bold;
}

.forgot-password {
    font-size: 14px;
    color: var(--primary-color);
    text-decoration: none;
    transition: color 0.3s ease;
}

.forgot-password:hover {
    color: var(--primary-dark);
    text-decoration: underline;
}

.btn-login {
    width: 100%;
    padding: 16px;
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    border: none;
    border-radius: 12px;
    color: white;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    transition: all 0.3s ease;
    box-shadow: 0 10px 30px rgba(0, 102, 255, 0.3);
    position: relative;
    overflow: hidden;
}

.btn-login::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 ease;
}

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

.btn-login:hover {
    transform: translateY(-2px);
    box-shadow: 0 15px 40px rgba(0, 102, 255, 0.4);
}

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

.demo-info {
    margin-top: 28px;
    padding: 16px;
    background: rgba(0, 102, 255, 0.05);
    border: 1px solid rgba(0, 102, 255, 0.2);
    border-radius: 12px;
    font-size: 13px;
    color: var(--text-secondary);
    line-height: 1.6;
}

.demo-info strong {
    color: var(--text-primary);
    display: block;
    margin-bottom: 8px;
}

.login-footer {
    margin-top: 40px;
    text-align: center;
    font-size: 13px;
    color: var(--text-tertiary);
}

/* RESPONSIVE */
@media (max-width: 1024px) {
    .login-left {
        display: none;
    }
    
    .login-right {
        width: 100%;
    }
}

@media (max-width: 480px) {
    .login-form-container {
        padding: 30px 20px;
    }
    
    .logo {
        width: 70px;
        height: 70px;
        padding: 6px;
    }
    
    .logo-section h1 {
        font-size: 26px;
    }
    
    .form-header h2 {
        font-size: 24px;
    }
    
    .slide-content {
        padding: 40px 20px;
    }
    
    .slide-content h2 {
        font-size: 32px;
    }
}