:root {
    /* Core Palette - Light Mode */
    --clr-primary: #A33332;
    /* Crimson */
    --clr-primary-light: #C44D4C;
    --clr-primary-dark: #7A2222;

    --clr-surface: #F8F5F1;
    /* Cream (Default Background) */
    --clr-bg-alt: #E8E4DE;
    /* Darker Cream/Grey for clear card contrast */

    --glass-surface: rgba(255, 255, 255, 0.85);
    /* Slightly more opaque */
    --glass-border: rgba(163, 51, 50, 0.15);
    /* Subtle Primary Tint */

    --clr-ink: #1A3C34;
    /* Deep Green */
    --clr-ink-light: #2C5F52;

    --clr-text-main: var(--clr-ink);
    --clr-text-muted: #5C7A72;
    --clr-text-on-primary: #FFFFFF;

    --clr-border: #D8D0C5;

    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 2rem;
    --spacing-xl: 4rem;

    /* Shadows */
    --shadow-sm: 0 2px 4px rgba(26, 60, 52, 0.08);
    /* Stronger */
    --shadow-md: 0 6px 12px rgba(26, 60, 52, 0.12);
    --shadow-lg: 0 15px 25px rgba(26, 60, 52, 0.15);
}

[data-theme="dark"] {
    /* Core Palette - Dark Mode */
    --clr-primary: #E55C5B;
    --clr-primary-light: #FF807F;
    --clr-primary-dark: #B33938;

    --clr-surface: #0F172A;
    /* Deep Slate (Default) */
    --clr-bg-alt: #1E293B;
    /* Lighter Slate (Alt) */

    --glass-surface: rgba(30, 41, 59, 0.7);
    --glass-border: rgba(255, 255, 255, 0.1);

    --clr-ink: #E8F5F1;
    --clr-ink-light: #B0CCC6;

    --clr-text-main: var(--clr-ink);
    --clr-text-muted: #94A3B8;
    --clr-text-on-primary: #0F172A;

    --clr-border: #334155;

    /* Shadows */
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.5);
}

/* Flash Prevention */
html {
    visibility: visible;
    opacity: 1;
}