/* ============================================
   YaDev Design Tokens
   Sistema de variables CSS para portafolio premium
   ============================================ */

:root {
    /* ===== Tipografía ===== */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-size-xs: clamp(0.75rem, 0.7rem + 0.25vw, 0.875rem);
    --font-size-sm: clamp(0.875rem, 0.8rem + 0.35vw, 1rem);
    --font-size-base: clamp(1rem, 0.9rem + 0.5vw, 1.125rem);
    --font-size-lg: clamp(1.125rem, 1rem + 0.6vw, 1.25rem);
    --font-size-xl: clamp(1.25rem, 1.1rem + 0.75vw, 1.5rem);
    --font-size-2xl: clamp(1.5rem, 1.25rem + 1.25vw, 2rem);
    --font-size-3xl: clamp(1.875rem, 1.5rem + 1.875vw, 2.5rem);
    --font-size-4xl: clamp(2.25rem, 1.75rem + 2.5vw, 3rem);
    --font-size-5xl: clamp(3rem, 2rem + 5vw, 4rem);

    /* ===== Espaciado ===== */
    --space-1: 0.25rem;
    --space-2: 0.5rem;
    --space-3: 0.75rem;
    --space-4: 1rem;
    --space-5: 1.25rem;
    --space-6: 1.5rem;
    --space-8: 2rem;
    --space-10: 2.5rem;
    --space-12: 3rem;
    --space-16: 4rem;
    --space-20: 5rem;
    --space-24: 6rem;

    /* ===== Colores Base (Neutrales) ===== */
    --color-white: #ffffff;
    --color-black: #000000;
    --color-gray-50: #f9fafb;
    --color-gray-100: #f3f4f6;
    --color-gray-200: #e5e7eb;
    --color-gray-300: #d1d5db;
    --color-gray-400: #9ca3af;
    --color-gray-500: #6b7280;
    --color-gray-600: #4b5563;
    --color-gray-700: #374151;
    --color-gray-800: #1f2937;
    --color-gray-900: #111827;
    --color-gray-950: #030712;

    /* ===== Colores de Industria (defaults, override en archivos de industria) ===== */
    --color-primary: #6366f1;
    --color-primary-light: #818cf8;
    --color-primary-dark: #4f46e5;
    --color-secondary: #8b5cf6;
    --color-secondary-light: #a78bfa;
    --color-secondary-dark: #7c3aed;

    /* ===== Gradientes ===== */
    --gradient-primary: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
    --gradient-primary-hover: linear-gradient(135deg, var(--color-primary-dark), var(--color-secondary-dark));
    --gradient-dark: linear-gradient(135deg, var(--color-gray-900), var(--color-gray-800));
    --gradient-overlay: linear-gradient(to bottom, rgba(0,0,0,0.7), rgba(0,0,0,0.3));

    /* ===== Sombras ===== */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-base: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px -1px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -2px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -4px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 8px 10px -6px rgba(0, 0, 0, 0.1);
    --shadow-2xl: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
    --shadow-primary: 0 10px 30px -5px rgba(var(--color-primary-rgb, 99, 102, 241), 0.3);
    --shadow-primary-lg: 0 20px 40px -10px rgba(var(--color-primary-rgb, 99, 102, 241), 0.4);

    /* ===== Bordes ===== */
    --radius-sm: 0.25rem;
    --radius-base: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-2xl: 1.5rem;
    --radius-3xl: 2rem;
    --radius-full: 9999px;

    --border-width: 1px;
    --border-color: var(--color-gray-200);
    --border-color-light: var(--color-gray-100);

    /* ===== Transiciones ===== */
    --transition-fast: 150ms ease;
    --transition-base: 300ms ease;
    --transition-slow: 500ms ease;
    --transition-bounce: 300ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-spring: 500ms cubic-bezier(0.34, 1.56, 0.64, 1);

    /* ===== Z-index ===== */
    --z-dropdown: 100;
    --z-sticky: 200;
    --z-fixed: 300;
    --z-modal-backdrop: 400;
    --z-modal: 500;
    --z-popover: 600;
    --z-tooltip: 700;
    --z-float: 1000;

    /* ===== Containers ===== */
    --container-sm: 640px;
    --container-md: 768px;
    --container-lg: 1024px;
    --container-xl: 1280px;
    --container-2xl: 1536px;

    /* ===== Title Decoration ===== */
    --title-underline: linear-gradient(90deg, var(--color-primary), var(--color-secondary));
    --title-underline-width: 80px;
    --title-underline-height: 4px;
}

/* ===== Base Styles ===== */
*, *::before, *::after {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    line-height: 1.6;
    color: var(--color-gray-700);
    background-color: var(--color-gray-50);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* ===== Utility Classes ===== */
.container {
    width: 100%;
    max-width: var(--container-xl);
    margin-left: auto;
    margin-right: auto;
    padding-left: var(--space-4);
    padding-right: var(--space-4);
}

@media (min-width: 640px) {
    .container {
        padding-left: var(--space-6);
        padding-right: var(--space-6);
    }
}

@media (min-width: 1024px) {
    .container {
        padding-left: var(--space-8);
        padding-right: var(--space-8);
    }
}

/* Text colors using CSS variables */
.text-primary { color: var(--color-primary); }
.text-primary-light { color: var(--color-primary-light); }
.text-primary-dark { color: var(--color-primary-dark); }
.text-secondary { color: var(--color-secondary); }

/* Background colors */
.bg-primary { background-color: var(--color-primary); }
.bg-primary-light { background-color: var(--color-primary-light); }
.bg-gradient-primary { background: var(--gradient-primary); }

/* Border colors */
.border-primary { border-color: var(--color-primary); }

/* Shadow utilities */
.shadow-primary { box-shadow: var(--shadow-primary); }
.shadow-primary-lg { box-shadow: var(--shadow-primary-lg); }

/* Gradient text */
.text-gradient {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* Section spacing */
.section {
    padding-top: var(--space-24);
    padding-bottom: var(--space-24);
}

.section-sm {
    padding-top: var(--space-16);
    padding-bottom: var(--space-16);
}

/* ===== Typography ===== */
.title-decorated {
    position: relative;
    display: inline-block;
}

.title-decorated::after {
    content: '';
    position: absolute;
    bottom: -12px;
    left: 50%;
    transform: translateX(-50%);
    width: var(--title-underline-width);
    height: var(--title-underline-height);
    background: var(--title-underline);
    border-radius: var(--radius-sm);
}

.title-decorated-left::after {
    left: 0;
    transform: none;
}

/* ===== Focus States ===== */
:focus-visible {
    outline: 2px solid var(--color-primary);
    outline-offset: 2px;
}

/* ===== Selection ===== */
::selection {
    background-color: var(--color-primary);
    color: var(--color-white);
}