/* ===================================
   SparvagenCal Design System
   Liquid Glass / Apple-inspired UI
   WCAG 2.1 AA Compliant
   =================================== */

/* CSS Custom Properties / Design Tokens */
:root {
    /* Colors - Liquid Glass Theme */
    --color-primary: #007AFF;
    --color-primary-hover: #0051D5;
    --color-primary-light: #E5F1FF;
    --color-primary-dark: #004EBC;
    
    /* Glass Effect Colors */
    --glass-bg: rgba(255, 255, 255, 0.7);
    --glass-bg-dark: rgba(255, 255, 255, 0.5);
    --glass-border: rgba(255, 255, 255, 0.2);
    --glass-shadow: rgba(0, 0, 0, 0.1);
    
    /* Neutrals - High Contrast for WCAG */
    --color-slate-50: #F9FAFB;
    --color-slate-100: #F1F5F9;
    --color-slate-200: #E2E8F0;
    --color-slate-300: #CBD5E1;
    --color-slate-400: #94A3B8;
    --color-slate-500: #64748B;
    --color-slate-600: #475569;
    --color-slate-700: #334155;
    --color-slate-800: #1E293B;
    --color-slate-900: #0F172A;
    
    /* Semantic Colors - WCAG AA Compliant */
    --color-success: #059669;
    --color-success-light: #D1FAE5;
    --color-warning: #D97706;
    --color-warning-light: #FEF3C7;
    --color-error: #DC2626;
    --color-error-light: #FEE2E2;
    --color-info: #0284C7;
    --color-info-light: #E0F2FE;
    
    /* Background - Gradient */
    --color-background: linear-gradient(135deg, #F0F4F8 0%, #E8EEF5 100%);
    --color-surface: rgba(255, 255, 255, 0.8);
    
    /* Text - High Contrast for Accessibility */
    --color-text-primary: #0F172A;
    --color-text-secondary: #475569;
    --color-text-tertiary: #64748B;
    --color-text-inverse: #FFFFFF;
    
    /* Borders */
    --color-border: rgba(226, 232, 240, 0.8);
    --color-border-hover: rgba(203, 213, 225, 0.9);
    
    /* Band Colors - WCAG AA Contrast */
    --color-zebra: #0284C7;
    --color-ratet: #059669;
    --color-slutstation: #DC2626;
    
    /* Typography */
    --font-family-base: -apple-system, BlinkMacSystemFont, 'SF Pro Display', 'Segoe UI', Roboto, sans-serif;
    --font-family-mono: 'SF Mono', 'Consolas', monospace;
    
    --font-size-xs: 0.75rem;      /* 12px */
    --font-size-sm: 0.875rem;     /* 14px */
    --font-size-base: 1rem;       /* 16px */
    --font-size-lg: 1.125rem;     /* 18px */
    --font-size-xl: 1.25rem;      /* 20px */
    --font-size-2xl: 1.5rem;      /* 24px */
    --font-size-3xl: 1.875rem;    /* 30px */
    --font-size-4xl: 2.25rem;     /* 36px */
    
    --font-weight-normal: 400;
    --font-weight-medium: 500;
    --font-weight-semibold: 600;
    --font-weight-bold: 700;
    
    --line-height-tight: 1.25;
    --line-height-normal: 1.5;
    --line-height-relaxed: 1.75;
    
    /* Spacing Scale */
    --spacing-xs: 0.25rem;    /* 4px */
    --spacing-sm: 0.5rem;     /* 8px */
    --spacing-md: 1rem;       /* 16px */
    --spacing-lg: 1.5rem;     /* 24px */
    --spacing-xl: 2rem;       /* 32px */
    --spacing-2xl: 3rem;      /* 48px */
    --spacing-3xl: 4rem;      /* 64px */
    
    /* Border Radius - Liquid Glass */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 20px;
    --radius-2xl: 24px;
    --radius-full: 9999px;
    
    /* Shadows - Soft, Elevated */
    --shadow-xs: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.08);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.12);
    --shadow-xl: 0 16px 48px rgba(0, 0, 0, 0.15);
    
    /* Glass Effect */
    --blur-sm: 8px;
    --blur-md: 16px;
    --blur-lg: 24px;
    
    /* Transitions */
    --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-base: 200ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 300ms cubic-bezier(0.4, 0, 0.2, 1);
    
    /* Z-Index Scale */
    --z-dropdown: 1000;
    --z-sticky: 1020;
    --z-fixed: 1030;
    --z-modal-backdrop: 1040;
    --z-modal: 1050;
    --z-popover: 1060;
    --z-tooltip: 1070;
}

/* Reset and Base Styles */
*, *::before, *::after {
    box-sizing: border-box;
}

html {
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    scroll-behavior: smooth;
}

body {
    margin: 0;
    padding: 0;
    font-family: var(--font-family-base);
    font-size: var(--font-size-base);
    font-weight: var(--font-weight-normal);
    line-height: var(--line-height-normal);
    color: var(--color-text-primary);
    background: var(--color-background);
    min-height: 100vh;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    margin: 0 0 var(--spacing-md);
    font-weight: var(--font-weight-semibold);
    line-height: var(--line-height-tight);
    color: var(--color-text-primary);
}

h1 {
    font-size: var(--font-size-3xl);
    font-weight: var(--font-weight-bold);
    letter-spacing: -0.02em;
}

h2 {
    font-size: var(--font-size-2xl);
    letter-spacing: -0.01em;
}

h3 {
    font-size: var(--font-size-xl);
}

h4 {
    font-size: var(--font-size-lg);
}

p {
    margin: 0 0 var(--spacing-md);
}

a {
    color: var(--color-primary);
    text-decoration: none;
    transition: color var(--transition-fast);
}

a:hover {
    color: var(--color-primary-hover);
}

/* Focus Styles - WCAG 2.1 */
*:focus-visible {
    outline: 2px solid var(--color-primary);
    outline-offset: 2px;
    border-radius: var(--radius-sm);
}

/* Glass Effect Utility */
.glass {
    background: var(--glass-bg);
    backdrop-filter: blur(var(--blur-md)) saturate(180%);
    -webkit-backdrop-filter: blur(var(--blur-md)) saturate(180%);
    border: 1px solid var(--glass-border);
    box-shadow: var(--shadow-sm);
}

.glass-strong {
    background: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(var(--blur-lg)) saturate(200%);
    -webkit-backdrop-filter: blur(var(--blur-lg)) saturate(200%);
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-lg);
    font-size: var(--font-size-base);
    font-weight: var(--font-weight-medium);
    line-height: var(--line-height-tight);
    border: none;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-base);
    white-space: nowrap;
    min-height: 44px; /* WCAG touch target */
}

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.btn-primary {
    color: var(--color-text-inverse);
    background: var(--color-primary);
    box-shadow: 0 2px 8px rgba(0, 122, 255, 0.3);
}

.btn-primary:hover:not(:disabled) {
    background: var(--color-primary-hover);
    box-shadow: 0 4px 12px rgba(0, 122, 255, 0.4);
    transform: translateY(-1px);
}

.btn-secondary {
    color: var(--color-text-primary);
    background: var(--glass-bg);
    backdrop-filter: blur(var(--blur-sm));
    border: 1px solid var(--color-border);
}

.btn-secondary:hover:not(:disabled) {
    background: rgba(255, 255, 255, 0.9);
    border-color: var(--color-border-hover);
}

/* Cards - Glass Effect */
.card {
    background: var(--glass-bg);
    backdrop-filter: blur(var(--blur-md)) saturate(180%);
    -webkit-backdrop-filter: blur(var(--blur-md)) saturate(180%);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    overflow: hidden;
    transition: all var(--transition-base);
}

.card:hover {
    box-shadow: var(--shadow-lg);
    transform: translateY(-2px);
}

/* Forms */
.form-label {
    display: block;
    margin-bottom: var(--spacing-xs);
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-medium);
    color: var(--color-text-primary);
}

.form-control {
    display: block;
    width: 100%;
    padding: var(--spacing-sm) var(--spacing-md);
    font-size: var(--font-size-base);
    font-family: var(--font-family-base);
    line-height: var(--line-height-normal);
    color: var(--color-text-primary);
    background: rgba(255, 255, 255, 0.8);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
    min-height: 44px; /* WCAG touch target */
}

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

.form-control:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px var(--color-primary-light);
}

/* Validation - High Contrast */
.valid.modified:not([type=checkbox]) {
    border-color: var(--color-success);
}

.invalid {
    border-color: var(--color-error);
}

.validation-message {
    margin-top: var(--spacing-xs);
    font-size: var(--font-size-sm);
    color: var(--color-error);
    font-weight: var(--font-weight-medium);
}

/* Utility Classes */
.text-center { text-align: center; }
.text-primary { color: var(--color-primary); }
.text-secondary { color: var(--color-text-secondary); }
.text-success { color: var(--color-success); }
.text-error { color: var(--color-error); }

/* Loading Skeleton - Glass Effect */
.skeleton {
    background: linear-gradient(
        90deg,
        rgba(255, 255, 255, 0.3) 0%,
        rgba(255, 255, 255, 0.5) 50%,
        rgba(255, 255, 255, 0.3) 100%
    );
    background-size: 200% 100%;
    animation: skeleton-loading 1.5s ease-in-out infinite;
    border-radius: var(--radius-md);
    backdrop-filter: blur(var(--blur-sm));
}

@keyframes skeleton-loading {
    0% { background-position: 200% 0; }
    100% { background-position: -200% 0; }
}

/* Error UI - WCAG Compliant - Hidden by default */
.blazor-error-boundary {
    background: var(--color-error);
    padding: var(--spacing-lg) var(--spacing-xl);
    color: var(--color-text-inverse);
    border-radius: var(--radius-lg);
    margin: var(--spacing-md);
    box-shadow: var(--shadow-lg);
    display: none; /* Hidden by default */
}

.blazor-error-boundary.show {
    display: block;
}

.blazor-error-boundary::after {
    content: "Ett oväntat fel uppstod. Ladda om sidan.";
    font-weight: var(--font-weight-semibold);
}

#blazor-error-ui {
    background: var(--color-error);
    color: var(--color-text-inverse);
    padding: var(--spacing-md) var(--spacing-lg);
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    z-index: var(--z-fixed);
    box-shadow: var(--shadow-xl);
    display: none; /* Hidden by default */
    align-items: center;
    justify-content: center;
    gap: var(--spacing-md);
    min-height: 48px;
}

#blazor-error-ui.show {
    display: flex;
}

#blazor-error-ui .reload {
    color: var(--color-text-inverse);
    text-decoration: underline;
    font-weight: var(--font-weight-semibold);
    min-width: 44px;
    min-height: 44px;
    display: inline-flex;
    align-items: center;
}

#blazor-error-ui .dismiss {
    cursor: pointer;
    opacity: 0.9;
    transition: opacity var(--transition-fast);
    min-width: 44px;
    min-height: 44px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
}

#blazor-error-ui .dismiss:hover {
    opacity: 1;
}

/* Mobile First Responsive */
@media (max-width: 768px) {
    h1 {
        font-size: var(--font-size-2xl);
    }
    
    h2 {
        font-size: var(--font-size-xl);
    }
    
    .btn {
        min-height: 48px; /* Larger touch targets on mobile */
    }
}

/* High Contrast Mode Support */
@media (prefers-contrast: high) {
    :root {
        --color-text-primary: #000000;
        --color-text-secondary: #1E293B;
        --color-border: #475569;
    }
}

/* Reduced Motion Support - WCAG */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}