/* ============================================
   KALINKA ACADEMY - DESIGN TOKENS
   Apple-style UI System
   ============================================ */

/* ==================== LAYOUT ==================== */
:root {
    /* Container */
    --container-max: 1240px;
    --padding-mobile: 16px;
    --padding-tablet: 24px;
    --padding-desktop: 32px;

    /* Grid */
    --grid-columns: 12;
    --grid-gap: 24px;
}

/* ==================== SPACING SCALE ==================== */
:root {
    --space-1: 4px;
    --space-2: 8px;
    --space-3: 12px;
    --space-4: 16px;
    --space-6: 24px;
    --space-8: 32px;
    --space-12: 48px;
    --space-16: 64px;
    --space-24: 96px;
    --space-30: 120px;

    /* Section spacing */
    --section-gap: 120px;
    --section-gap-mobile: 80px;
}

/* ==================== TYPOGRAPHY ==================== */
:root {
    /* Font family - Apple System Font Stack */
    --font-primary: -apple-system, BlinkMacSystemFont, "SF Pro Text", "SF Pro Display", "Segoe UI", Roboto, Arial, sans-serif;

    /* Font sizes - Desktop */
    --text-h1: 56px;
    --text-h2: 36px;
    --text-h3: 24px;
    --text-body: 18px;
    --text-caption: 14px;

    /* Font sizes - Mobile */
    --text-h1-mobile: 36px;
    --text-h2-mobile: 28px;
    --text-h3-mobile: 20px;
    --text-body-mobile: 16px;

    /* Font weights */
    --font-weight-regular: 400;
    --font-weight-medium: 500;
    --font-weight-semibold: 600;

    /* Letter spacing */
    --letter-spacing-tight: -0.02em;
    --letter-spacing-tighter: -0.015em;

    /* Line heights */
    --line-height-tight: 1.1;
    --line-height-body: 1.6;
}

/* ==================== COLORS - LIGHT THEME ==================== */
:root {
    /* Backgrounds */
    --color-background: #FAFAFA;
    --color-surface: #FFFFFF;

    /* Text */
    --color-text-primary: #1D1D1F;
    --color-text-secondary: #6E6E73;

    /* Border */
    --color-border: #D2D2D7;
    --color-border-light: #E8E8ED;

    /* Accent */
    --color-accent: #0071E3;
    --color-accent-hover: #0077ED;

    /* Brand gold (preserved from original) */
    --color-gold: #BFA475;
    --color-gold-hover: #A89060;

    /* Semantic */
    --color-success: #34C759;
    --color-warning: #FF9500;
    --color-error: #FF3B30;
}

/* ==================== COLORS - DARK THEME ==================== */
[data-theme="dark"] {
    /* Backgrounds */
    --color-background: #000000;
    --color-surface: #1C1C1E;

    /* Text */
    --color-text-primary: #F5F5F7;
    --color-text-secondary: #A1A1A6;

    /* Border */
    --color-border: #424245;
    --color-border-light: #2C2C2E;

    /* Accent */
    --color-accent: #2997FF;
    --color-accent-hover: #40A9FF;
}

/* ==================== BORDER RADII ==================== */
:root {
    --radius-sm: 12px;
    --radius-md: 16px;
    --radius-lg: 24px;
    --radius-full: 9999px;
}

/* ==================== SHADOWS ==================== */
:root {
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.04);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.08);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.12);
    --shadow-card: 0 2px 12px rgba(0, 0, 0, 0.08);
}

[data-theme="dark"] {
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.5);
    --shadow-card: 0 2px 12px rgba(0, 0, 0, 0.4);
}

/* ==================== MOTION ==================== */
:root {
    --transition-fast: 200ms cubic-bezier(0.25, 0.1, 0.25, 1);
    --transition-base: 300ms cubic-bezier(0.25, 0.1, 0.25, 1);
    --transition-slow: 400ms cubic-bezier(0.25, 0.1, 0.25, 1);

    /* Animation easing */
    --ease-out: cubic-bezier(0.25, 0.1, 0.25, 1);
    --ease-in-out: cubic-bezier(0.42, 0, 0.58, 1);
}

/* Respect reduced motion preference */
@media (prefers-reduced-motion: reduce) {
    :root {
        --transition-fast: 0ms;
        --transition-base: 0ms;
        --transition-slow: 0ms;
    }
}

/* ==================== Z-INDEX SCALE ==================== */
:root {
    --z-dropdown: 100;
    --z-sticky: 200;
    --z-fixed: 300;
    --z-header: 400;
    --z-modal-backdrop: 500;
    --z-modal: 600;
    --z-popover: 700;
    --z-tooltip: 800;
}

/* ==================== BREAKPOINTS (reference) ==================== */
/*
    Mobile: < 768px
    Tablet: 768px - 1023px
    Desktop: >= 1024px
    Wide: >= 1440px
*/