/* ===============================================
   THEMES.CSS - BUSINESS ANALYST QUIZ FORM
   Automatic Light/Dark Theme System for Notion Integration
   
   TABLE OF CONTENTS:
   1. Design System Foundation
   2. Core Color Palette
   3. Layout & Spacing System
   4. Typography System
   5. Light Theme (Default)
   6. Dark Theme (Auto-Detection)
   7. Manual Theme Controls
   8. Accessibility & Special Cases
   9. Theme Utilities
   =============================================== */

/* ===============================================
   1. DESIGN SYSTEM FOUNDATION
   Core design tokens and base variables
   =============================================== */

:root {
    /* ============ Z-INDEX SCALE ============ */
    --z-dropdown: 1000;
    --z-sticky: 1020;
    --z-fixed: 1030;
    --z-modal: 1040;
    --z-popover: 1050;
    --z-tooltip: 1060;

    /* ============ TRANSITIONS ============ */
    --transition-fast: 150ms ease-out;
    --transition-normal: 250ms ease-out;
    --transition-slow: 350ms ease-out;

    /* ============ BORDER RADIUS ============ */
    --radius-sm: 0.375rem;    /* 6px */
    --radius-md: 0.5rem;      /* 8px */
    --radius-lg: 0.75rem;     /* 12px */
    --radius-xl: 1rem;        /* 16px */
    --radius-2xl: 1.5rem;     /* 24px */
    --radius-full: 9999px;
}

/* ===============================================
   2. CORE COLOR PALETTE
   Brand colors and semantic color system
   =============================================== */

:root {
    /* ============ BRAND COLORS ============ */
    --accent-primary: #3b82f6;
    --accent-secondary: #1d4ed8;
    --accent-hover: #2563eb;
    --accent-light: rgba(59, 130, 246, 0.1);

    /* ============ SEMANTIC COLORS ============ */
    --success: #10b981;
    --success-light: rgba(16, 185, 129, 0.1);
    --warning: #f59e0b;
    --warning-light: rgba(245, 158, 11, 0.1);
    --info: #06b6d4;
    --info-light: rgba(6, 182, 212, 0.1);
    --error: #ef4444;
    --error-light: rgba(239, 68, 68, 0.1);

    /* ============ INTERACTIVE STATES ============ */
    --hover-overlay: rgba(0, 0, 0, 0.05);
    --active-overlay: rgba(0, 0, 0, 0.1);
    --focus-ring: rgba(59, 130, 246, 0.5);

    /* ============ PROGRESS & LOADING ============ */
    --progress-bg: rgba(229, 231, 235, 0.5);
    --progress-fill: var(--accent-primary);
}

/* ===============================================
   3. LAYOUT & SPACING SYSTEM
   Progressive spacing for different screen sizes
   =============================================== */

:root {
    /* ============ BASE 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 */

    /* ============ ULTRA MOBILE SPACING (≤320px) ============ */
    --spacing-ultra-xs: 0.125rem;   /* 2px */
    --spacing-ultra-sm: 0.25rem;    /* 4px */
    --spacing-ultra-md: 0.5rem;     /* 8px */
    --spacing-ultra-lg: 0.75rem;    /* 12px */
    --spacing-ultra-xl: 1rem;       /* 16px */
    --spacing-ultra-2xl: 1.5rem;    /* 24px */

    /* ============ COMPACT MOBILE SPACING (321-375px) ============ */
    --spacing-compact-xs: 0.1875rem; /* 3px */
    --spacing-compact-sm: 0.375rem;  /* 6px */
    --spacing-compact-md: 0.75rem;   /* 12px */
    --spacing-compact-lg: 1rem;      /* 16px */
    --spacing-compact-xl: 1.25rem;   /* 20px */
    --spacing-compact-2xl: 2rem;     /* 32px */

    /* ============ LARGE MOBILE SPACING (415-480px) ============ */
    --spacing-large-mobile-xs: 0.25rem;    /* 4px */
    --spacing-large-mobile-sm: 0.5rem;     /* 8px */
    --spacing-large-mobile-md: 1rem;       /* 16px */
    --spacing-large-mobile-lg: 1.5rem;     /* 24px */
    --spacing-large-mobile-xl: 2rem;       /* 32px */
    --spacing-large-mobile-2xl: 2.5rem;    /* 40px */
    --spacing-large-mobile-3xl: 3rem;      /* 48px */

    /* ============ DYNAMIC SPACING VARIABLES ============ */
    /* These change based on screen size via media queries */
    --container-padding: var(--spacing-lg);
    --card-padding: var(--spacing-xl);
    --section-padding: var(--spacing-2xl);
    --element-gap: var(--spacing-md);
    --button-padding-x: var(--spacing-xl);
    --button-padding-y: var(--spacing-md);
}

/* ===============================================
   4. TYPOGRAPHY SYSTEM
   Consistent type scale and responsive typography
   =============================================== */

:root {
    /* ============ BASE TYPOGRAPHY SCALE ============ */
    --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 WEIGHTS ============ */
    --font-weight-normal: 400;
    --font-weight-medium: 500;
    --font-weight-semibold: 600;
    --font-weight-bold: 700;

    /* ============ LINE HEIGHTS ============ */
    --line-height-tight: 1.25;
    --line-height-normal: 1.5;
    --line-height-relaxed: 1.75;

    /* ============ LARGE MOBILE TYPOGRAPHY (415-480px) ============ */
    --font-large-mobile-xs: 0.75rem;       /* 12px */
    --font-large-mobile-sm: 0.875rem;      /* 14px */
    --font-large-mobile-base: 1rem;        /* 16px */
    --font-large-mobile-lg: 1.125rem;      /* 18px */
    --font-large-mobile-xl: 1.375rem;      /* 22px */
    --font-large-mobile-2xl: 1.625rem;     /* 26px */
    --font-large-mobile-3xl: 2rem;         /* 32px */
    --font-large-mobile-4xl: 2.5rem;       /* 40px */

    /* ============ LARGE MOBILE LINE HEIGHTS ============ */
    --line-height-large-mobile-tight: 1.25;
    --line-height-large-mobile-normal: 1.4;
    --line-height-large-mobile-relaxed: 1.6;
}

/* ===============================================
   5. LIGHT THEME (DEFAULT)
   Default light theme color assignments
   =============================================== */

:root {
    /* ============ BACKGROUND COLORS ============ */
    --bg-primary: rgba(255, 255, 255, 0.95);
    --bg-secondary: rgba(249, 249, 249, 0.9);
    --bg-tertiary: rgba(243, 244, 246, 0.8);
    --bg-card: rgba(255, 255, 255, 0.8);
    --bg-overlay: rgba(0, 0, 0, 0.1);

    /* ============ TEXT COLORS ============ */
    --text-primary: #1f2937;
    --text-secondary: #6b7280;
    --text-tertiary: #9ca3af;
    --text-inverse: #ffffff;

    /* ============ BORDER COLORS ============ */
    --border-primary: rgba(229, 231, 235, 0.8);
    --border-secondary: rgba(209, 213, 219, 0.6);
    --border-accent: rgba(59, 130, 246, 0.3);

    /* ============ SHADOW COLORS ============ */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 
                 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --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);

    /* ============ FORM ELEMENTS ============ */
    --input-bg: rgba(255, 255, 255, 0.8);
    --input-border: var(--border-primary);
    --input-focus: var(--accent-primary);
    --input-placeholder: var(--text-tertiary);
}

/* ===============================================
   6. DARK THEME (AUTO-DETECTION)
   Automatic dark theme when system preference is dark
   =============================================== */

@media (prefers-color-scheme: dark) {
    :root {
        /* ============ DARK BACKGROUND COLORS ============ */
        --bg-primary: rgba(17, 24, 39, 0.95);
        --bg-secondary: rgba(31, 41, 55, 0.9);
        --bg-tertiary: rgba(55, 65, 81, 0.8);
        --bg-card: rgba(31, 41, 55, 0.8);
        --bg-overlay: rgba(255, 255, 255, 0.1);

        /* ============ DARK TEXT COLORS ============ */
        --text-primary: #f9fafb;
        --text-secondary: #d1d5db;
        --text-tertiary: #9ca3af;
        --text-inverse: #1f2937;

        /* ============ ADJUSTED BRAND COLORS ============ */
        --accent-primary: #60a5fa;
        --accent-secondary: #3b82f6;
        --accent-hover: #93c5fd;
        --accent-light: rgba(96, 165, 250, 0.1);

        /* ============ DARK SEMANTIC COLORS ============ */
        --success: #34d399;
        --success-light: rgba(52, 211, 153, 0.1);
        --warning: #fbbf24;
        --warning-light: rgba(251, 191, 36, 0.1);
        --info: #22d3ee;
        --info-light: rgba(34, 211, 238, 0.1);
        --error: #f87171;
        --error-light: rgba(248, 113, 113, 0.1);

        /* ============ DARK BORDER COLORS ============ */
        --border-primary: rgba(75, 85, 99, 0.6);
        --border-secondary: rgba(107, 114, 128, 0.4);
        --border-accent: rgba(96, 165, 250, 0.3);

        /* ============ DARK SHADOW COLORS ============ */
        --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.3);
        --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.4), 
                     0 2px 4px -1px rgba(0, 0, 0, 0.3);
        --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.4), 
                     0 4px 6px -2px rgba(0, 0, 0, 0.3);
        --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.5), 
                     0 10px 10px -5px rgba(0, 0, 0, 0.3);

        /* ============ DARK INTERACTIVE STATES ============ */
        --hover-overlay: rgba(255, 255, 255, 0.05);
        --active-overlay: rgba(255, 255, 255, 0.1);
        --focus-ring: rgba(96, 165, 250, 0.5);

        /* ============ DARK FORM ELEMENTS ============ */
        --input-bg: rgba(55, 65, 81, 0.8);
        --input-border: var(--border-primary);
        --input-focus: var(--accent-primary);
        --input-placeholder: var(--text-tertiary);

        /* ============ DARK PROGRESS COLORS ============ */
        --progress-bg: rgba(75, 85, 99, 0.5);
        --progress-fill: var(--accent-primary);
    }
}

/* ===============================================
   7. MANUAL THEME CONTROLS
   Fallback for browsers without prefers-color-scheme support
   =============================================== */

/* Light theme (explicit) - uses default :root values */
[data-theme="light"] {
    /* Inherits from default :root - no overrides needed */
}

/* Dark theme (explicit) */
[data-theme="dark"] {
    --bg-primary: rgba(17, 24, 39, 0.95);
    --bg-secondary: rgba(31, 41, 55, 0.9);
    --bg-tertiary: rgba(55, 65, 81, 0.8);
    --bg-card: rgba(31, 41, 55, 0.8);
    --bg-overlay: rgba(255, 255, 255, 0.1);
    
    --text-primary: #f9fafb;
    --text-secondary: #d1d5db;
    --text-tertiary: #9ca3af;
    --text-inverse: #1f2937;
    
    --accent-primary: #60a5fa;
    --accent-secondary: #3b82f6;
    --accent-hover: #93c5fd;
    --accent-light: rgba(96, 165, 250, 0.1);
    
    --success: #34d399;
    --success-light: rgba(52, 211, 153, 0.1);
    --warning: #fbbf24;
    --warning-light: rgba(251, 191, 36, 0.1);
    --info: #22d3ee;
    --info-light: rgba(34, 211, 238, 0.1);
    --error: #f87171;
    --error-light: rgba(248, 113, 113, 0.1);
    
    --border-primary: rgba(75, 85, 99, 0.6);
    --border-secondary: rgba(107, 114, 128, 0.4);
    --border-accent: rgba(96, 165, 250, 0.3);
    
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.4), 
                 0 2px 4px -1px rgba(0, 0, 0, 0.3);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.4), 
                 0 4px 6px -2px rgba(0, 0, 0, 0.3);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.5), 
                 0 10px 10px -5px rgba(0, 0, 0, 0.3);
    
    --hover-overlay: rgba(255, 255, 255, 0.05);
    --active-overlay: rgba(255, 255, 255, 0.1);
    --focus-ring: rgba(96, 165, 250, 0.5);
    
    --progress-bg: rgba(75, 85, 99, 0.5);
    --input-bg: rgba(55, 65, 81, 0.8);
    --input-border: var(--border-primary);
    --input-placeholder: var(--text-tertiary);
}

/* ===============================================
   8. ACCESSIBILITY & SPECIAL CASES
   Support for user preferences and print media
   =============================================== */

/* 8.1 Reduced Motion Support */
@media (prefers-reduced-motion: reduce) {
    :root {
        --transition-fast: 0ms;
        --transition-normal: 0ms;
        --transition-slow: 0ms;
    }
    
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
}

/* 8.2 High Contrast Support */
@media (prefers-contrast: high) {
    :root {
        --border-primary: #000000;
        --border-secondary: #000000;
        --text-secondary: var(--text-primary);
    }
    
    [data-theme="dark"] {
        --border-primary: #ffffff;
        --border-secondary: #ffffff;
        --text-secondary: var(--text-primary);
    }
}

/* 8.3 Print Styles */
@media print {
    :root {
        --bg-primary: #ffffff;
        --bg-secondary: #ffffff;
        --bg-card: #ffffff;
        --text-primary: #000000;
        --text-secondary: #333333;
        --border-primary: #cccccc;
        --shadow-sm: none;
        --shadow-md: none;
        --shadow-lg: none;
        --shadow-xl: none;
    }
}

/* 8.4 Mobile Dark Mode Enhancements */
@media (prefers-color-scheme: dark) and (max-width: 48rem) {
    .question-card {
        box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
        border: 1px solid rgba(75, 85, 99, 0.5);
    }
    
    .answer-option-label {
        background-color: rgba(55, 65, 81, 0.8);
        border-color: rgba(75, 85, 99, 0.6);
    }
    
    .answer-option input[type="radio"]:checked + .answer-option-label {
        background-color: rgba(96, 165, 250, 0.15);
        border-color: var(--accent-primary);
        box-shadow: 0 0 20px rgba(96, 165, 250, 0.2);
    }
}

/* ===============================================
   9. THEME UTILITIES
   Helper classes for quick theme application
   =============================================== */

/* 9.1 Background Utilities */
.bg-primary { background-color: var(--bg-primary); }
.bg-secondary { background-color: var(--bg-secondary); }
.bg-tertiary { background-color: var(--bg-tertiary); }
.bg-card { background-color: var(--bg-card); }

/* 9.2 Text Color Utilities */
.text-primary { color: var(--text-primary); }
.text-secondary { color: var(--text-secondary); }
.text-tertiary { color: var(--text-tertiary); }
.text-inverse { color: var(--text-inverse); }
.text-accent { color: var(--accent-primary); }
.text-success { color: var(--success); }
.text-warning { color: var(--warning); }
.text-info { color: var(--info); }
.text-error { color: var(--error); }

/* 9.3 Border Utilities */
.border-primary { border-color: var(--border-primary); }
.border-secondary { border-color: var(--border-secondary); }
.border-accent { border-color: var(--border-accent); }

/* 9.4 Interactive State Utilities */
.hover-overlay:hover::after {
    content: '';
    position: absolute;
    inset: 0;
    background-color: var(--hover-overlay);
    pointer-events: none;
}

.focus-ring:focus,
.focus-ring:focus-visible {
    outline: none;
    box-shadow: 0 0 0 3px var(--focus-ring);
}

/* ===============================================
   THEME DEBUGGING (Development Only)
   Uncomment for theme development debugging
   =============================================== */

/*
[data-debug-theme] {
    position: relative;
}

[data-debug-theme]::before {
    content: 'Theme: ' attr(data-theme);
    position: fixed;
    top: 10px;
    right: 10px;
    background: var(--bg-card);
    color: var(--text-primary);
    padding: 8px 12px;
    border-radius: var(--radius-md);
    font-size: var(--font-size-sm);
    z-index: var(--z-tooltip);
    border: 1px solid var(--border-primary);
}

@media (prefers-color-scheme: dark) {
    [data-debug-theme]::after {
        content: ' (Auto Dark)';
    }
}
*/