:root {
    --primary-color: #4CAF50;
    --secondary-color: #66BB6A;
    --tertiary-color: #81C784;
    --accent-color: #2E7D32;
    --light-color: #A5D6A7;
    --very-light-color: #C8E6C9;
    --warning-color: #FF9800;
    --success-color: #4CAF50;
    --error-color: #F44336;
    --water-color: #4FC3F7;
    --sun-color: #FFC107;
    
    --bg-primary: rgba(27, 94, 32, 0.95);
    --bg-secondary: rgba(46, 125, 50, 0.9);
    --bg-tertiary: rgba(76, 175, 80, 0.85);
    --bg-glass: rgba(255, 255, 255, 0.1);
    --input-bg: rgba(27, 94, 32, 0.8);
    
    --text-primary: #4CAF50;
    --text-secondary: rgba(255, 255, 255, 0.9);
    --text-muted: rgba(255, 255, 255, 0.7);
    --text-dark: #1B5E20;
    --text-accent: #2E7D32;
    
    --shadow-sm: 0 4px 20px rgba(76, 175, 80, 0.15);
    --shadow-md: 0 10px 40px rgba(76, 175, 80, 0.2);
    --shadow-lg: 0 20px 60px rgba(76, 175, 80, 0.25);
    --glow-soft: 0 0 15px rgba(76, 175, 80, 0.4);
    --glow-strong: 0 0 25px rgba(76, 175, 80, 0.6);
    
    --border-radius-sm: 8px;
    --border-radius-md: 12px;
    --border-radius-lg: 16px;
    
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
    
    --font-primary: 'Poppins', sans-serif;
    --font-secondary: 'Nunito', sans-serif;
    
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
}

* {
    box-sizing: border-box;
}

body {
    min-height: 100vh;
    margin: 0;
    padding: 0;
    font-family: var(--font-secondary);
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    overflow-x: hidden;
}

/* Main wrapper */
.login-wrapper {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-lg);
}

/* Main login container */
.login-container {
    background: rgba(255, 255, 255, 0.95);
    border: 2px solid rgba(76, 175, 80, 0.2);
    border-radius: var(--border-radius-lg);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
    width: 100%;
    max-width: 480px;
    padding: var(--spacing-2xl);
    backdrop-filter: blur(10px);
    position: relative;
    z-index: 1;
}


/* Header Section */
.login-header {
    margin-bottom: var(--spacing-xl);
    padding-bottom: var(--spacing-lg);
    border-bottom: 1px solid rgba(76, 175, 80, 0.2);
    position: relative;
    z-index: 2;
}

.header-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    gap: var(--spacing-md);
}

.logo-container {
    flex-shrink: 0;
}

.logo-img {
    width: 120px;
    height: 120px;
    filter: drop-shadow(0 2px 4px rgba(76, 175, 80, 0.3));
}

.system-info {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
}

.system-title {
    font-family: var(--font-primary);
    font-size: 1.4rem;
    font-weight: 700;
    color: var(--text-primary);
    margin: 0;
    letter-spacing: 1px;
    line-height: 1.2;
}

.system-subtitle {
    font-family: var(--font-primary);
    font-size: 0.9rem;
    font-weight: 400;
    color: #666;
    margin: 0;
    letter-spacing: 0.5px;
    opacity: 0.9;
}

.system-status {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-sm);
}

.status-indicator {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--success-color);
    box-shadow: 0 0 4px var(--success-color);
}

.status-text {
    font-size: 0.8rem;
    color: var(--success-color);
    font-weight: 600;
}

/* Welcome Section */
.welcome-section {
    text-align: center;
    margin-bottom: var(--spacing-lg);
    position: relative;
    z-index: 2;
}

.welcome-title {
    font-family: var(--font-primary);
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--text-primary);
    margin: 0 0 var(--spacing-sm) 0;
}

.welcome-message {
    font-size: 0.9rem;
    color: #666;
    margin: 0;
}

/* Form Section */
.login-form {
    position: relative;
    z-index: 2;
}

.form-section {
    margin-bottom: var(--spacing-xl);
    width: 100%;
}

.action-section {
    width: 100%;
}

.input-group {
    margin-bottom: var(--spacing-lg);
    position: relative;
    width: 100%;
}

.input-wrapper {
    position: relative;
    display: flex;
    align-items: center;
    width: 100%;
}

.input-label {
    position: absolute;
    top: -10px;
    left: var(--spacing-md);
    font-size: 0.8rem;
    color: var(--primary-color);
    background: linear-gradient(90deg, transparent 0%, #ffffff 20%, #ffffff 80%, transparent 100%);
    padding: 0 var(--spacing-sm);
    font-weight: 600;
    z-index: 3;
}

.form-control {
    background: #ffffff;
    border: 2px solid #e0e0e0;
    border-radius: var(--border-radius-sm);
    padding: var(--spacing-lg) var(--spacing-xl);
    color: #333;
    width: 100%;
    font-size: 1rem;
    transition: all var(--transition-normal);
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.05);
    position: relative;
    z-index: 2;
    box-sizing: border-box;
}

.form-control:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(76, 175, 80, 0.2), 0 4px 8px rgba(0, 0, 0, 0.1);
    background: #ffffff;
    outline: none;
    color: #333;
}

.form-control::placeholder {
    color: #999;
    opacity: 1;
}

.icon-input {
    padding-left: 3.5rem;
}

.input-icon {
    position: absolute;
    left: var(--spacing-lg);
    color: var(--primary-color);
    font-size: 1.1rem;
    z-index: 3;
    transition: all var(--transition-normal);
    filter: drop-shadow(0 0 3px rgba(76, 175, 80, 0.4));
}

.input-group:focus-within .input-icon {
    color: var(--secondary-color);
    filter: drop-shadow(0 0 6px rgba(102, 187, 106, 0.6));
    transform: scale(1.1);
}

.input-border {
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
    transition: width var(--transition-normal);
    z-index: 3;
    border-radius: 0 0 var(--border-radius-sm) var(--border-radius-sm);
}

.input-group:focus-within .input-border {
    width: 100%;
}

.password-toggle {
    position: absolute;
    right: var(--spacing-lg);
    background: none;
    border: none;
    color: #999;
    cursor: pointer;
    font-size: 1rem;
    z-index: 3;
    transition: color var(--transition-fast);
}

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

/* Security Section */
.security-section {
    margin-bottom: var(--spacing-xl);
}

.security-options {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-lg);
}

.checkbox-wrapper {
    display: flex;
    align-items: center;
}

.security-checkbox {
    display: none;
}

.checkbox-label {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    cursor: pointer;
    font-size: 0.9rem;
    color: var(--text-secondary);
    transition: color var(--transition-fast);
}

.checkbox-indicator {
    width: 18px;
    height: 18px;
    border: 2px solid rgba(76, 175, 80, 0.5);
    border-radius: 4px;
    position: relative;
    transition: all var(--transition-fast);
    background: rgba(255, 255, 255, 0.1);
}

.security-checkbox:checked + .checkbox-label .checkbox-indicator {
    background: var(--primary-color);
    border-color: var(--primary-color);
    box-shadow: 0 0 8px rgba(76, 175, 80, 0.4);
}

.security-checkbox:checked + .checkbox-label .checkbox-indicator::after {
    content: '✓';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    color: white;
    font-size: 0.9rem;
    font-weight: bold;
}

.biometric-btn {
    background: linear-gradient(135deg, rgba(76, 175, 80, 0.2), rgba(102, 187, 106, 0.2));
    border: 2px solid rgba(76, 175, 80, 0.4);
    border-radius: var(--border-radius-sm);
    width: 42px;
    height: 42px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary-color);
    cursor: pointer;
    transition: all var(--transition-normal);
}

.biometric-btn:hover {
    background: linear-gradient(135deg, rgba(76, 175, 80, 0.3), rgba(102, 187, 106, 0.3));
    box-shadow: var(--glow-soft);
    transform: scale(1.05);
    border-color: var(--primary-color);
}

.forgot-section {
    text-align: center;
}

.forgot-link {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    color: var(--text-muted);
    text-decoration: none;
    font-size: 0.9rem;
    transition: all var(--transition-normal);
}

.forgot-link:hover {
    color: var(--primary-color);
    text-shadow: 0 0 5px rgba(76, 175, 80, 0.4);
}

/* Action Section */
.action-section {
    text-align: center;
}

.login-btn {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    border: 2px solid var(--primary-color);
    border-radius: var(--border-radius-sm);
    padding: var(--spacing-lg) var(--spacing-2xl);
    color: white;
    font-weight: 700;
    font-size: 1rem;
    cursor: pointer;
    transition: all var(--transition-normal);
    position: relative;
    overflow: hidden;
    width: 100%;
    margin-bottom: var(--spacing-lg);
    box-shadow: var(--shadow-sm);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    box-sizing: border-box;
}

.login-btn:hover {
    background: linear-gradient(135deg, var(--secondary-color) 0%, var(--tertiary-color) 100%);
    box-shadow: var(--glow-strong);
    transform: translateY(-2px);
    border-color: var(--secondary-color);
}

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

.btn-content {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    transition: opacity var(--transition-fast);
}

.btn-loading {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    display: none;
    align-items: center;
    gap: var(--spacing-sm);
    color: white;
    font-weight: 700;
    font-size: 1rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.modern-spinner {
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    width: 20px;
    height: 20px;
}

.spinner-ring {
    position: absolute;
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-radius: 50%;
    animation: spin-pulse 1.5s cubic-bezier(0.4, 0, 0.2, 1) infinite;
}

.spinner-ring:nth-child(1) {
    width: 20px;
    height: 20px;
    border-top-color: rgba(255, 255, 255, 0.9);
    animation-delay: 0s;
}

.spinner-ring:nth-child(2) {
    width: 16px;
    height: 16px;
    border-top-color: rgba(255, 255, 255, 0.7);
    animation-delay: -0.5s;
}

.spinner-ring:nth-child(3) {
    width: 12px;
    height: 12px;
    border-top-color: rgba(255, 255, 255, 0.5);
    animation-delay: -1s;
}

@keyframes spin-pulse {
    0% {
        transform: rotate(0deg) scale(1);
        opacity: 1;
    }
    50% {
        transform: rotate(180deg) scale(0.8);
        opacity: 0.7;
    }
    100% {
        transform: rotate(360deg) scale(1);
        opacity: 1;
    }
}

.register-link {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.9rem;
    transition: all var(--transition-normal);
}

.register-link:hover {
    color: var(--primary-color);
    text-shadow: 0 0 5px rgba(76, 175, 80, 0.4);
}

/* Footer */
.login-footer {
    display: flex;
    justify-content: center;
    align-items: center;
    margin-top: var(--spacing-xl);
    padding-top: var(--spacing-lg);
    border-top: 1px solid rgba(76, 175, 80, 0.2);
    font-size: 0.8rem;
    position: relative;
    z-index: 2;
}

.copyright-notice {
    color: #666;
    font-family: var(--font-primary);
    text-align: center;
}



@media (max-width: 768px) {
    .login-wrapper {
        padding: var(--spacing-md);
    }
    
    .login-container {
        padding: var(--spacing-xl);
        max-width: 100%;
    }
    
    .header-content {
        gap: var(--spacing-sm);
    }
    
    .security-options {
        flex-direction: column;
        gap: var(--spacing-md);
        align-items: center;
    }
    
}

@media (max-width: 480px) {
    .login-container {
        padding: var(--spacing-lg);
    }
    
    .system-title {
        font-size: 1.2rem;
    }
    
    .form-control {
        padding: var(--spacing-md) var(--spacing-lg);
    }
    
    .icon-input {
        padding-left: 3rem;
    }
    
    .login-footer {
        text-align: center;
    }
    
}