:root {
    /* ========== CORES ========== */
    /* Cores Primárias */
    --primary-color: #007bff;
    --primary-hover: #0056b3;
    --primary-dark: #004085;

    /* Cores Secundárias */
    --secondary-color: #6c757d;
    --secondary-hover: #5a6268;

    /* Cores de Destaque */
    --accent-color: #00d4ff;
    --accent-hover: #00b8e6;

    /* Cores de Fundo */
    --bg-color: #0f0f0f;
    --bg-secondary: #1a1a1a;
    --bg-tertiary: #252525;

    /* Cores de Texto */
    --text-color: #f8f9fa;
    --text-secondary: #adb5bd;
    --text-muted: #6c757d;

    /* Cores de Sucesso/Erro/Aviso */
    --success-color: #28a745;
    --warning-color: #ffc107;
    --error-color: #dc3545;

    /* ========== TIPOGRAFIA ========== */
    /* Fontes */
    --font-main: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-display: 'Space Grotesk', 'Inter', sans-serif;
    --font-mono: 'Fira Code', 'Courier New', monospace;

    /* Tamanhos de Fonte - Responsivos */
    --font-size-h1: clamp(3rem, 8vw, 6rem);
    --font-size-h2: clamp(2rem, 5vw, 4rem);
    --font-size-h3: clamp(1.5rem, 3vw, 2.5rem);
    --font-size-h4: clamp(1.25rem, 2.5vw, 2rem);
    --font-size-h5: clamp(1.125rem, 2vw, 1.5rem);
    --font-size-h6: clamp(1rem, 1.5vw, 1.25rem);
    --font-size-body: clamp(1rem, 1.2vw, 1.125rem);
    --font-size-small: 0.875rem;
    --font-size-tiny: 0.75rem;

    /* Pesos de Fonte */
    --font-weight-light: 300;
    --font-weight-regular: 400;
    --font-weight-medium: 500;
    --font-weight-semibold: 600;
    --font-weight-bold: 700;
    --font-weight-extrabold: 800;

    /* Line Heights */
    --line-height-tight: 1.2;
    --line-height-normal: 1.5;
    --line-height-relaxed: 1.75;

    /* ========== ESPAÇAMENTO ========== */
    --spacing-unit: 8px;
    --spacing-xs: calc(var(--spacing-unit) * 1);    /* 8px */
    --spacing-sm: calc(var(--spacing-unit) * 2);    /* 16px */
    --spacing-md: calc(var(--spacing-unit) * 3);    /* 24px */
    --spacing-lg: calc(var(--spacing-unit) * 5);    /* 40px */
    --spacing-xl: calc(var(--spacing-unit) * 8);    /* 64px */
    --spacing-2xl: calc(var(--spacing-unit) * 12);  /* 96px */
    --spacing-3xl: calc(var(--spacing-unit) * 16);  /* 128px */

    /* ========== ANIMAÇÕES E TRANSIÇÕES ========== */
    /* Durações */
    --transition-fast: 0.15s;
    --transition-base: 0.3s;
    --transition-slow: 0.6s;
    --transition-slower: 1s;

    /* Easing Functions */
    --easing-smooth: cubic-bezier(0.37, 0, 0.63, 1);
    --easing-bounce: cubic-bezier(0.68, -0.55, 0.265, 1.55);
    --easing-ease-in: cubic-bezier(0.4, 0, 1, 1);
    --easing-ease-out: cubic-bezier(0, 0, 0.2, 1);
    --easing-ease-in-out: cubic-bezier(0.4, 0, 0.2, 1);

    /* ========== SOMBRAS ========== */
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.2);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.3);
    --shadow-xl: 0 16px 48px rgba(0, 0, 0, 0.4);
    --shadow-glow-blue: 0 0 20px rgba(0, 123, 255, 0.3);
    --shadow-glow-cyan: 0 0 20px rgba(0, 212, 255, 0.3);

    /* ========== BORDAS ========== */
    --border-radius-sm: 4px;
    --border-radius-md: 8px;
    --border-radius-lg: 12px;
    --border-radius-xl: 16px;
    --border-radius-2xl: 24px;
    --border-radius-full: 9999px;

    /* ========== LAYOUT ========== */
    --container-max-width: 1400px;
    --container-padding: 50px;
    --header-height: 80px;

    /* Z-Index Layers */
    --z-index-dropdown: 1000;
    --z-index-sticky: 1020;
    --z-index-fixed: 1030;
    --z-index-modal-backdrop: 1040;
    --z-index-modal: 1050;
    --z-index-popover: 1060;
    --z-index-tooltip: 1070;

    /* ========== GLASSMORPHISM ========== */
    --glass-bg: rgba(255, 255, 255, 0.05);
    --glass-bg-hover: rgba(255, 255, 255, 0.08);
    --glass-border: rgba(255, 255, 255, 0.1);
    --glass-blur: blur(10px);
    --glass-blur-strong: blur(20px);
}

/* ========== MEDIA QUERIES BREAKPOINTS ========== */
@media (max-width: 1200px) {
    :root {
        --container-padding: 30px;
    }
}

@media (max-width: 768px) {
    :root {
        --container-padding: 20px;
        --header-height: 60px;
        --spacing-3xl: calc(var(--spacing-unit) * 10);
        --spacing-2xl: calc(var(--spacing-unit) * 8);
    }
}

@media (max-width: 480px) {
    :root {
        --container-padding: 16px;
    }
}

/* ========== PREFERÊNCIAS DO USUÁRIO ========== */
@media (prefers-reduced-motion: reduce) {
    :root {
        --transition-fast: 0.01ms;
        --transition-base: 0.01ms;
        --transition-slow: 0.01ms;
        --transition-slower: 0.01ms;
    }
}

@media (prefers-color-scheme: light) {
    /* Se quiser adicionar tema claro no futuro */
}