/* ============================================
   CSS VARIABLES - Color Palette, Typography & Spacing
   ============================================ */
:root {
    /* Primary Colors */
    --primary-dark: #045a96;
    --primary: #067ac1;
    --primary-light: #0d8dd4;
    --primary-hover: #034a7a;
    
    /* Secondary Colors (Gradient) */
    --gradient-start: #067ac1;
    --gradient-end: #045a96;
    
    /* Neutral Colors */
    --bg-primary: #ffffff;
    --bg-secondary: #f5f5f5;
    --bg-tertiary: #f5f7fb;
    --bg-quaternary: #f4f6fb;
    --text-primary: #1f2937;
    --text-secondary: #6b7280;
    --text-tertiary: #374151;
    --text-quaternary: #111827;
    --border: #e5e7eb;
    --border-light: #d1d5db;
    --border-hover: #9ca3af;
    
    /* Semantic Colors */
    --success: #10b981;
    --success-light: #d1fae5;
    --success-dark: #065f46;
    --success-border: #6ee7b7;
    --error: #ef4444;
    --error-light: #fee2e2;
    --error-dark: #991b1b;
    --error-border: #fca5a5;
    --warning: #f9a703;
    --info: #067ac1;
    --info-light: #dbeafe;
    --info-dark: #045a96;
    --info-border: #93c5fd;
    
    /* Typography Scale */
    --font-size-xs: 12px;
    --font-size-sm: 14px;
    --font-size-base: 16px;
    --font-size-lg: 18px;
    --font-size-xl: 20px;
    --font-size-2xl: 24px;
    --font-size-3xl: 32px;
    --font-size-4xl: 38px;
    
    /* Font Weights */
    --font-weight-normal: 400;
    --font-weight-medium: 500;
    --font-weight-semibold: 600;
    --font-weight-bold: 700;
    
    /* Spacing Scale */
    --spacing-1: 4px;
    --spacing-2: 8px;
    --spacing-3: 12px;
    --spacing-4: 16px;
    --spacing-5: 20px;
    --spacing-6: 24px;
    --spacing-8: 32px;
    --spacing-10: 40px;
    --spacing-12: 48px;
    
    /* Border Radius */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 20px;
    --radius-2xl: 24px;
    --radius-full: 999px;
    
    /* Shadows */
    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 20px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 40px rgba(0, 0, 0, 0.15);
    --shadow-xl: 0 15px 50px rgba(0, 0, 0, 0.2);
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background-color: var(--bg-secondary);
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
}

/* Background Pattern - Geometric Network */
body::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image: 
        /* Nodes (circles) */
        radial-gradient(circle, rgba(180, 180, 180, 0.08) 2px, transparent 2px),
        /* Lines connecting nodes */
        linear-gradient(45deg, transparent 48%, rgba(180, 180, 180, 0.06) 49%, rgba(180, 180, 180, 0.06) 51%, transparent 52%),
        linear-gradient(-45deg, transparent 48%, rgba(180, 180, 180, 0.06) 49%, rgba(180, 180, 180, 0.06) 51%, transparent 52%),
        linear-gradient(0deg, transparent 48%, rgba(180, 180, 180, 0.06) 49%, rgba(180, 180, 180, 0.06) 51%, transparent 52%),
        linear-gradient(90deg, transparent 48%, rgba(180, 180, 180, 0.06) 49%, rgba(180, 180, 180, 0.06) 51%, transparent 52%);
    background-size: 80px 80px;
    background-position: 0 0;
    opacity: 0.5;
    z-index: 0;
}

.login-container {
    position: relative;
    z-index: 1;
    width: 100%;
    max-width: 450px;
    padding: 20px;
}

.login-card {
    background: var(--bg-primary);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    padding: var(--spacing-10) var(--spacing-8);
    width: 100%;
}

.login-header {
    text-align: center;
    margin-bottom: var(--spacing-8);
}

.icon-wrapper {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 64px;
    height: 64px;
    background-color: var(--primary-dark);
    border-radius: var(--radius-md);
    margin-bottom: var(--spacing-5);
}

.calendar-icon {
    width: 36px;
    height: 36px;
    color: white;
}

.login-title {
    font-size: var(--font-size-2xl);
    font-weight: var(--font-weight-bold);
    color: var(--primary-dark);
    margin-bottom: var(--spacing-2);
    line-height: 1.3;
}

.login-subtitle {
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
    font-weight: var(--font-weight-normal);
}

/* Flash Messages */
.flash-messages {
    margin-bottom: 20px;
}

.flash-message {
    padding: var(--spacing-3) var(--spacing-4);
    border-radius: var(--radius-sm);
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-medium);
    margin-bottom: var(--spacing-3);
    animation: slideIn 0.3s ease-out;
}

.flash-success {
    background-color: var(--success-light);
    color: var(--success-dark);
    border: 1px solid var(--success-border);
}

.flash-error {
    background-color: var(--error-light);
    color: var(--error-dark);
    border: 1px solid var(--error-border);
}

.flash-info {
    background-color: var(--info-light);
    color: var(--info-dark);
    border: 1px solid var(--info-border);
}

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

.login-form {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-6);
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-2);
}

.form-label {
    display: flex;
    align-items: center;
    gap: var(--spacing-2);
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-medium);
    color: var(--text-tertiary);
}

.label-icon {
    width: 18px;
    height: 18px;
    color: var(--text-secondary);
    flex-shrink: 0;
}

.form-input {
    width: 100%;
    padding: var(--spacing-3) var(--spacing-4);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-sm);
    font-size: var(--font-size-sm);
    color: var(--text-quaternary);
    background-color: var(--bg-primary);
    font-family: inherit;
    transition: border-color 0.2s ease;
}

.form-input:hover {
    border-color: var(--border-hover);
}

.form-input:focus {
    outline: none;
    border-color: var(--primary-dark);
    box-shadow: 0 0 0 3px rgba(6, 122, 193, 0.1);
}

.form-input::placeholder {
    color: var(--border-hover);
}

/* Styling untuk select dropdown */
select.form-input {
    cursor: pointer;
    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='%236b7280' d='M6 9L1 4h10z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right var(--spacing-3) center;
    padding-right: var(--spacing-10);
}

select.form-input:hover {
    border-color: var(--border-hover);
}

select.form-input:focus {
    outline: none;
    border-color: var(--primary-dark);
    box-shadow: 0 0 0 3px rgba(6, 122, 193, 0.1);
}

.password-wrapper {
    position: relative;
    display: flex;
    align-items: center;
}

.password-wrapper .form-input {
    padding-right: 45px;
}

.password-toggle {
    position: absolute;
    right: var(--spacing-3);
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--spacing-1);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-secondary);
    transition: color 0.2s ease;
}

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

.password-toggle:focus {
    outline: none;
    color: var(--primary-dark);
}

.eye-icon {
    width: 20px;
    height: 20px;
}

.login-button {
    width: 100%;
    padding: var(--spacing-4) var(--spacing-5);
    background-color: var(--primary-dark);
    color: var(--bg-primary);
    border: none;
    border-radius: var(--radius-sm);
    font-size: var(--font-size-base);
    font-weight: var(--font-weight-semibold);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-2);
    font-family: inherit;
    margin-top: var(--spacing-2);
    transition: background-color 0.2s ease;
}

.login-button:hover {
    background-color: var(--primary-hover);
}

.login-button:active {
    transform: scale(0.98);
}

.login-button:focus {
    outline: none;
    box-shadow: 0 0 0 3px rgba(6, 122, 193, 0.3);
}

.arrow-icon {
    width: 20px;
    height: 20px;
    color: white;
}

/* Register Section */
.register-section {
    margin-top: var(--spacing-6);
    text-align: center;
    padding-top: var(--spacing-6);
    border-top: 1px solid var(--border);
}

.register-text {
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
    margin-bottom: var(--spacing-3);
}

.register-button {
    display: inline-block;
    width: 100%;
    padding: var(--spacing-3) var(--spacing-5);
    background-color: var(--bg-primary);
    color: var(--primary-dark);
    border: 2px solid var(--primary-dark);
    border-radius: var(--radius-sm);
    font-size: var(--font-size-base);
    font-weight: var(--font-weight-semibold);
    text-decoration: none;
    cursor: pointer;
    font-family: inherit;
    text-align: center;
    transition: background-color 0.2s ease, color 0.2s ease;
}

.register-button:hover {
    background-color: var(--primary-dark);
    color: var(--bg-primary);
}

.register-button:active {
    transform: scale(0.98);
}

.register-button:focus {
    outline: none;
    box-shadow: 0 0 0 3px rgba(6, 122, 193, 0.2);
}

/* Responsive Design */
@media (max-width: 480px) {
    .login-card {
        padding: var(--spacing-8) var(--spacing-6);
    }

    .login-title {
        font-size: var(--font-size-xl);
    }

    .icon-wrapper {
        width: 56px;
        height: 56px;
    }

    .calendar-icon {
        width: 32px;
        height: 32px;
    }
}