/*
 * Modern Blue Survey Theme - CSS Variables
 * Design Tokens and Custom Properties
 *
 * Based on reference design with dark gradient background
 * and bright cyan-blue accents (#06AFFF)
 */

:root {
    /* ==================== BRAND COLORS ==================== */

    /* Primary Color - Bright Cyan-Blue for accents and highlights */
    --corporate-primary: #06AFFF;
    --corporate-primary-hover: #0598e6;
    --corporate-primary-active: #0481cc;
    --corporate-primary-light: #3dc2ff;
    --corporate-primary-lighter: #80d9ff;
    --corporate-primary-dark: #056b99;

    /* Background Gradient Colors */
    --bg-gradient-start: #1a2332;      /* Dark blue - top */
    --bg-gradient-end: #000000;        /* Black - bottom */

    /* Container & Card Backgrounds */
    --container-bg: rgba(30, 40, 55, 0.85);  /* Semi-transparent dark blue-gray */
    --container-bg-solid: #1e2837;
    --container-bg-hover: rgba(35, 47, 65, 0.9);

    /* Text Colors */
    --text-primary: #FFFFFF;           /* Pure white for main text */
    --text-secondary: #C5D3E0;         /* Light blue-gray for secondary text */
    --text-muted: #8A9AAB;             /* Muted blue-gray for help text */
    --text-disabled: #5A6A7A;          /* Disabled state */

    /* ==================== SEMANTIC COLORS ==================== */
    --color-success: #00D9A3;          /* Bright teal for success */
    --color-warning: #FFA726;          /* Warm orange for warnings */
    --color-error: #FF5252;            /* Bright red for errors */
    --color-info: #00B8D4;             /* Cyan for info messages */

    /* ==================== NEUTRAL COLORS ==================== */
    --color-white: #FFFFFF;
    --color-black: #000000;
    --color-gray-100: #F8F9FB;
    --color-gray-200: #E5E9EF;
    --color-gray-300: #C5D3E0;
    --color-gray-400: #A5B8CC;
    --color-gray-500: #8A9AAB;
    --color-gray-600: #6A7A8A;
    --color-gray-700: #4A5A6A;
    --color-gray-800: #2A3A4A;
    --color-gray-900: #1A2332;

    /* ==================== TYPOGRAPHY ==================== */

    /* Font Families */
    --font-family-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Helvetica Neue', Arial, sans-serif;
    --font-family-headings: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Helvetica Neue', Arial, sans-serif;
    --font-family-monospace: 'SF Mono', 'Monaco', 'Cascadia Code', 'Roboto Mono', Courier, monospace;

    /* Font Sizes */
    --font-size-xs: 0.75rem;      /* 12px */
    --font-size-sm: 0.875rem;     /* 14px */
    --font-size-base: 1rem;       /* 16px */
    --font-size-md: 1.125rem;     /* 18px */
    --font-size-lg: 1.25rem;      /* 20px */
    --font-size-xl: 1.5rem;       /* 24px */
    --font-size-2xl: 2rem;        /* 32px */
    --font-size-3xl: 2.5rem;      /* 40px */
    --font-size-4xl: 3rem;        /* 48px */

    /* Font Weights */
    --font-weight-light: 300;
    --font-weight-normal: 400;
    --font-weight-medium: 500;
    --font-weight-semibold: 600;
    --font-weight-bold: 700;
    --font-weight-extrabold: 800;

    /* Line Heights */
    --line-height-tight: 1.25;
    --line-height-snug: 1.375;
    --line-height-normal: 1.5;
    --line-height-relaxed: 1.625;
    --line-height-loose: 2;

    /* Letter Spacing */
    --letter-spacing-tight: -0.025em;
    --letter-spacing-normal: 0;
    --letter-spacing-wide: 0.025em;
    --letter-spacing-wider: 0.05em;
    --letter-spacing-widest: 0.1em;

    /* ==================== SPACING SCALE ==================== */
    --spacing-0: 0;
    --spacing-1: 0.25rem;     /* 4px */
    --spacing-2: 0.5rem;      /* 8px */
    --spacing-3: 0.75rem;     /* 12px */
    --spacing-4: 1rem;        /* 16px */
    --spacing-5: 1.25rem;     /* 20px */
    --spacing-6: 1.5rem;      /* 24px */
    --spacing-8: 2rem;        /* 32px */
    --spacing-10: 2.5rem;     /* 40px */
    --spacing-12: 3rem;       /* 48px */
    --spacing-16: 4rem;       /* 64px */
    --spacing-20: 5rem;       /* 80px */
    --spacing-24: 6rem;       /* 96px */
    --spacing-32: 8rem;       /* 128px */

    /* ==================== BORDERS ==================== */
    --border-width-thin: 1px;
    --border-width-base: 2px;
    --border-width-thick: 3px;

    --border-color-base: rgba(255, 255, 255, 0.1);
    --border-color-light: rgba(255, 255, 255, 0.05);
    --border-color-medium: rgba(255, 255, 255, 0.15);
    --border-color-strong: rgba(255, 255, 255, 0.25);
    --border-color-primary: var(--corporate-primary);

    /* Border Radius */
    --radius-none: 0;
    --radius-sm: 4px;
    --radius-base: 8px;
    --radius-md: 10px;
    --radius-lg: 12px;
    --radius-xl: 16px;
    --radius-2xl: 20px;
    --radius-3xl: 24px;
    --radius-full: 9999px;

    /* ==================== SHADOWS ==================== */
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow-base: 0 2px 8px rgba(0, 0, 0, 0.15);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.20);
    --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.25);
    --shadow-xl: 0 12px 32px rgba(0, 0, 0, 0.30);
    --shadow-2xl: 0 16px 48px rgba(0, 0, 0, 0.35);

    /* Glow Effects (for primary color) */
    --glow-sm: 0 0 10px rgba(6, 175, 255, 0.3);
    --glow-base: 0 0 20px rgba(6, 175, 255, 0.4);
    --glow-lg: 0 0 30px rgba(6, 175, 255, 0.5);

    /* Combined Shadow + Glow */
    --shadow-glow: 0 4px 12px rgba(0, 0, 0, 0.20), 0 0 20px rgba(6, 175, 255, 0.2);

    /* ==================== TRANSITIONS ==================== */
    --transition-fastest: 100ms ease;
    --transition-fast: 150ms ease;
    --transition-base: 250ms ease;
    --transition-slow: 350ms ease;
    --transition-slower: 500ms ease;

    /* Transition Properties */
    --transition-all: all var(--transition-base);
    --transition-colors: background-color var(--transition-base), border-color var(--transition-base), color var(--transition-base);
    --transition-transform: transform var(--transition-base);
    --transition-opacity: opacity var(--transition-base);

    /* ==================== Z-INDEX SCALE ==================== */
    --z-base: 1;
    --z-dropdown: 1000;
    --z-sticky: 1020;
    --z-fixed: 1030;
    --z-backdrop: 1040;
    --z-modal: 1050;
    --z-popover: 1060;
    --z-tooltip: 1070;

    /* ==================== LAYOUT ==================== */
    --container-max-width: 1200px;
    --container-padding: var(--spacing-6);
    --container-padding-mobile: var(--spacing-4);

    /* Product Card Specific */
    --product-card-padding: var(--spacing-8);
    --product-card-padding-mobile: var(--spacing-4);
    --product-card-gap: var(--spacing-6);
    --product-image-width: 40%;
    --product-image-radius: var(--radius-lg);

    /* Progress Bar */
    --progress-height: 3px;
    --progress-bg: rgba(255, 255, 255, 0.1);
    --progress-fill: var(--corporate-primary);

    /* ==================== FORM ELEMENTS ==================== */
    --input-bg: rgba(255, 255, 255, 0.05);
    --input-bg-hover: rgba(255, 255, 255, 0.08);
    --input-bg-focus: rgba(255, 255, 255, 0.10);
    --input-border: var(--border-color-base);
    --input-border-hover: var(--border-color-medium);
    --input-border-focus: var(--corporate-primary);
    --input-text: var(--text-primary);
    --input-placeholder: var(--text-muted);
    --input-padding-y: var(--spacing-3);
    --input-padding-x: var(--spacing-4);
    --input-radius: var(--radius-base);
    --input-height: 44px;                    /* Touch-friendly minimum */

    /* Dropdown Specific */
    --dropdown-bg: var(--input-bg);
    --dropdown-border: var(--input-border);
    --dropdown-arrow-color: var(--corporate-primary);

    /* ==================== BUTTONS ==================== */
    --button-padding-y: var(--spacing-3);
    --button-padding-x: var(--spacing-6);
    --button-radius: var(--radius-base);
    --button-height: 44px;
    --button-font-weight: var(--font-weight-medium);

    /* Button Primary */
    --button-primary-bg: var(--corporate-primary);
    --button-primary-bg-hover: var(--corporate-primary-hover);
    --button-primary-bg-active: var(--corporate-primary-active);
    --button-primary-text: var(--color-white);
    --button-primary-border: var(--corporate-primary);

    /* Button Secondary */
    --button-secondary-bg: transparent;
    --button-secondary-bg-hover: rgba(6, 175, 255, 0.1);
    --button-secondary-bg-active: rgba(6, 175, 255, 0.2);
    --button-secondary-text: var(--corporate-primary);
    --button-secondary-border: var(--corporate-primary);

    /* ==================== BREAKPOINTS ==================== */
    --breakpoint-xs: 375px;
    --breakpoint-sm: 576px;
    --breakpoint-md: 768px;
    --breakpoint-lg: 992px;
    --breakpoint-xl: 1200px;
    --breakpoint-2xl: 1400px;

    /* ==================== BACKDROP BLUR ==================== */
    --backdrop-blur-sm: blur(4px);
    --backdrop-blur-base: blur(8px);
    --backdrop-blur-md: blur(12px);
    --backdrop-blur-lg: blur(16px);
    --backdrop-blur-xl: blur(24px);
}

/* ==================== DARK MODE ADJUSTMENTS ==================== */
/* This theme is dark by default, but we can adjust for system preferences */
@media (prefers-color-scheme: light) {
    /* Optional: Provide light mode overrides if needed */
    /* For now, theme stays dark regardless */
}

/* ==================== REDUCED MOTION ==================== */
@media (prefers-reduced-motion: reduce) {
    :root {
        --transition-fastest: 0ms;
        --transition-fast: 0ms;
        --transition-base: 0ms;
        --transition-slow: 0ms;
        --transition-slower: 0ms;
    }
}

/* ==================== HIGH CONTRAST MODE ==================== */
@media (prefers-contrast: high) {
    :root {
        --border-color-base: rgba(255, 255, 255, 0.3);
        --border-color-medium: rgba(255, 255, 255, 0.4);
        --border-color-strong: rgba(255, 255, 255, 0.5);
    }
}