:root {
    /* --- Core Palette (Neo-Glass) --- */
    --color-primary: #2563eb;
    /* Royal Blue */
    --color-primary-rgb: 37, 99, 235;
    --color-primary-hover: #1d4ed8;

    --color-secondary: #7c3aed;
    /* Electric Purple */
    --color-secondary-rgb: 124, 58, 237;

    --color-success: #10b981;
    /* Emerald */
    --color-success-rgb: 16, 185, 129;

    --color-warning: #f59e0b;
    /* Amber */
    --color-danger: #ef4444;
    /* Rose */

    /* --- Light Mode (Frosted Ice) --- */
    --color-bg-base: #f0f2f5;
    --color-bg-glass: rgba(255, 255, 255, 0.7);
    --color-bg-glass-strong: rgba(255, 255, 255, 0.9);
    --color-bg-surface: #ffffff;
    --color-bg-subtle: #f8fafc;

    --color-text-main: #1e293b;
    --color-text-title: #0f172a;
    --color-text-muted: #64748b;

    --color-border: rgba(0, 0, 0, 0.08);
    --glass-border: 1px solid rgba(255, 255, 255, 0.4);

    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.05);
    --shadow-lg: 0 10px 30px -5px rgba(0, 0, 0, 0.08);
    --shadow-glass: 0 8px 32px 0 rgba(31, 38, 135, 0.1);

    --backdrop-blur: 16px;

    /* Inputs */
    --color-input-bg: rgba(255, 255, 255, 0.6);
    --color-input-bg-focus: rgba(255, 255, 255, 0.95);
    --color-input-text: #0f172a;

    /* Typography */
    --font-family-base: 'Inter', -apple-system, system-ui, sans-serif;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.5rem;
    --font-size-2xl: 2rem;

    /* Spacing & Radius */
    --spacing-1: 0.25rem;
    --spacing-2: 0.5rem;
    --spacing-3: 0.75rem;
    --spacing-4: 1rem;
    --spacing-6: 1.5rem;
    --spacing-8: 2rem;

    --radius-sm: 8px;
    --radius-md: 14px;
    --radius-lg: 24px;
    /* Super rounded for modern feel */
    --radius-full: 9999px;

    --transition-base: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* --- Dark Mode (Cyber Deep) --- */
[data-theme="dark"] {
    /* Neon Accents */
    --color-primary: #3b82f6;
    /* Bright Blue */
    --color-primary-rgb: 59, 130, 246;
    --color-primary-hover: #60a5fa;

    --color-bg-base: #0f172a;
    /* Deep Slate */

    /* Glass Layers */
    --color-bg-glass: rgba(15, 23, 42, 0.65);
    --color-bg-glass-strong: rgba(15, 23, 42, 0.85);
    --color-bg-surface: rgba(30, 41, 59, 0.7);
    --color-bg-subtle: rgba(15, 23, 42, 0.5);

    --color-text-main: #e2e8f0;
    --color-text-title: #f8fafc;
    --color-text-muted: #94a3b8;

    --color-border: rgba(255, 255, 255, 0.08);
    --glass-border: 1px solid rgba(255, 255, 255, 0.08);
    /* Fina e sutil */

    --shadow-lg: 0 20px 50px -10px rgba(0, 0, 0, 0.5);
    --shadow-glass: 0 8px 32px 0 rgba(0, 0, 0, 0.4);

    --color-input-bg: rgba(0, 0, 0, 0.2);
    --color-input-bg-focus: rgba(0, 0, 0, 0.4);
    --color-input-text: #f8fafc;
}

@media (prefers-color-scheme: dark) {
    :root:not([data-theme="light"]) {
        --color-primary: #3b82f6;
        --color-bg-base: #0f172a;
        --color-bg-glass: rgba(15, 23, 42, 0.65);
        --color-bg-glass-strong: rgba(15, 23, 42, 0.85);
        --color-bg-surface: rgba(30, 41, 59, 0.7);
        --color-bg-subtle: rgba(15, 23, 42, 0.5);
        --color-text-main: #e2e8f0;
        --color-text-title: #f8fafc;
        --color-text-muted: #94a3b8;
        --color-border: rgba(255, 255, 255, 0.08);
        --glass-border: 1px solid rgba(255, 255, 255, 0.08);
        --shadow-lg: 0 20px 50px -10px rgba(0, 0, 0, 0.5);
        --shadow-glass: 0 8px 32px 0 rgba(0, 0, 0, 0.4);
        --color-input-bg: rgba(0, 0, 0, 0.2);
        --color-input-bg-focus: rgba(0, 0, 0, 0.4);
        --color-input-text: #f8fafc;
    }
}