/* =========================================
   Design System & Tokens
   ========================================= */
:root {
    /* Colors - Dark Mode (Default for OS preference) */
    --bg-color: #050505;
    --surface-color: rgba(20, 20, 20, 0.6);
    --surface-border: rgba(255, 255, 255, 0.08);
    --text-primary: #ffffff;
    --text-secondary: #a0a0a0;
    --accent-color: #ffffff;
    --glow-color: rgba(255, 255, 255, 0.12);
    
    /* Typography */
    --font-sans: 'Inter', system-ui, -apple-system, sans-serif;
    
    /* Spacing */
    --space-sm: 0.5rem;
    --space-md: 1rem;
    --space-lg: 2rem;
    --space-xl: 4rem;
    
    /* Transitions */
    --transition-fast: 0.25s cubic-bezier(0.2, 0.8, 0.2, 1);
    --transition-medium: 0.5s cubic-bezier(0.16, 1, 0.3, 1);
    --transition-slow: 0.8s cubic-bezier(0.16, 1, 0.3, 1);
    
    /* Radius */
    --radius-md: 16px;
    --radius-lg: 24px;
}

@media (prefers-color-scheme: light) {
    :root {
        /* Colors - Light Mode (Automatic OS Preference) */
        --bg-color: #fafafa;
        --surface-color: rgba(255, 255, 255, 0.7);
        --surface-border: rgba(0, 0, 0, 0.08);
        --text-primary: #111111;
        --text-secondary: #666666;
        --accent-color: #000000;
        --glow-color: rgba(0, 0, 0, 0.06);
    }
}

/* =========================================
   Base & Reset
   ========================================= */
* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
}

body {
    background-color: var(--bg-color);
    color: var(--text-primary);
    font-family: var(--font-sans);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    overflow-x: hidden;
    /* Protección anti-copia */
    user-select: none;
    -webkit-user-select: none;
    -webkit-touch-callout: none;
}

a {
    color: inherit;
    text-decoration: none;
    transition: color var(--transition-fast);
}

/* =========================================
   Animated Background
   ========================================= */
.animated-bg {
    position: fixed;
    top: -50%; left: -50%; right: -50%; bottom: -50%;
    z-index: -2;
    background: 
        radial-gradient(circle at 20% 30%, var(--glow-color) 0%, transparent 40%),
        radial-gradient(circle at 80% 70%, var(--glow-color) 0%, transparent 40%);
    filter: blur(100px);
    opacity: 0.7;
    animation: floatBg 20s ease-in-out infinite alternate;
    pointer-events: none;
}

@keyframes floatBg {
    0% { transform: translate(0, 0) scale(1); }
    50% { transform: translate(3%, 5%) scale(1.05); }
    100% { transform: translate(-3%, -2%) scale(1); }
}

/* Central subtle glow */
.glow-blob {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 80vw;
    height: 80vh;
    background: radial-gradient(circle, var(--glow-color) 0%, transparent 60%);
    z-index: -1;
    pointer-events: none;
    opacity: 0.6;
    filter: blur(80px);
}

/* =========================================
   Layout & Utilities
   ========================================= */
.container {
    width: 100%;
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 1.5rem;
}

/* =========================================
   Hero Section
   ========================================= */
.hero {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
    position: relative;
    padding: 2rem 1.5rem;
}

.hero-content {
    max-width: 800px;
    z-index: 2;
}

.badge {
    display: inline-block;
    padding: 6px 16px;
    border-radius: 999px;
    background: var(--surface-color);
    border: 1px solid var(--surface-border);
    color: var(--text-secondary);
    font-size: 0.85rem;
    font-weight: 500;
    margin-bottom: var(--space-lg);
    letter-spacing: 0.5px;
    text-transform: uppercase;
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    transition: transform var(--transition-fast), border-color var(--transition-fast);
}

.interactive-badge:hover {
    transform: translateY(-2px) scale(1.02);
    border-color: var(--text-secondary);
}

.hero-logo {
    width: clamp(180px, 35vw, 350px);
    margin: var(--space-md) auto var(--space-sm) auto;
    display: block;
    animation: titleReveal 1s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

.hero-logo-img {
    width: 100%;
    height: auto;
    display: block;
}

.hero-title {
    font-size: clamp(1rem, 2.5vw, 1.6rem);
    font-weight: 500;
    line-height: 1.1;
    letter-spacing: -0.04em;
    margin-bottom: var(--space-md);
    background: linear-gradient(180deg, var(--text-primary) 0%, var(--text-secondary) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    animation: titleReveal 1s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

.hero-subtitle {
    font-size: clamp(1rem, 2vw, 1.25rem);
    color: var(--text-secondary);
    margin-bottom: var(--space-lg);
    max-width: 600px;
    margin-inline: auto;
}

.hero-actions {
    display: flex;
    gap: var(--space-md);
    justify-content: center;
    flex-wrap: wrap;
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 12px 28px;
    border-radius: 999px;
    font-weight: 500;
    font-size: 0.95rem;
    transition: all var(--transition-fast);
    cursor: pointer;
    border: 1px solid transparent;
}

.btn-primary {
    background: var(--accent-color);
    color: var(--bg-color);
}

.btn-primary:hover {
    transform: translateY(-3px) scale(1.02);
    box-shadow: 0 10px 25px var(--glow-color);
}

/* =========================================
   Projects Section
   ========================================= */
.projects {
    padding: var(--space-xl) 1.5rem;
}

.section-header {
    text-align: center;
    margin-bottom: var(--space-xl);
}

.section-header h2 {
    font-size: clamp(2rem, 4vw, 2.8rem);
    font-weight: 600;
    letter-spacing: -0.02em;
    margin-bottom: 8px;
}

.section-header p {
    color: var(--text-secondary);
    font-size: clamp(1rem, 2vw, 1.15rem);
}

.projects-grid {
    display: flex;
    flex-direction: column;
    gap: var(--space-xl);
}

/* Glow Card Effect (Linear/Vercel inspired) */
.glow-card {
    position: relative;
    border-radius: var(--radius-lg);
    background: var(--surface-color);
    border: 1px solid var(--surface-border);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    overflow: hidden;
    transition: transform var(--transition-medium), border-color var(--transition-fast);
}

.glow-card:hover {
    transform: translateY(-5px);
    border-color: rgba(150, 150, 150, 0.3);
}

.glow-card::before {
    content: "";
    position: absolute;
    top: 0; left: 0; right: 0; bottom: 0;
    background: radial-gradient(600px circle at var(--mouse-x) var(--mouse-y), var(--glow-color), transparent 40%);
    z-index: 0;
    opacity: 0;
    transition: opacity var(--transition-fast);
    pointer-events: none;
}

.glow-card:hover::before {
    opacity: 1;
}

.card-content {
    position: relative;
    z-index: 1;
    display: flex;
    flex-direction: column;
    padding: clamp(1.5rem, 4vw, 2.5rem);
    gap: clamp(1.5rem, 4vw, 2.5rem);
    background: inherit;
    border-radius: inherit;
}

@media (min-width: 768px) {
    .card-content {
        flex-direction: row;
        align-items: center;
    }
    /* Alternar orden en proyectos pares */
    .project-card:nth-child(even) .card-content {
        flex-direction: row-reverse;
    }
}

.project-image {
    flex: 1;
    border-radius: var(--radius-md);
    overflow: hidden;
    border: 1px solid var(--surface-border);
    position: relative;
}

.project-image::after {
    content: '';
    position: absolute;
    top: 0; left: 0; width: 100%; height: 100%;
    background: linear-gradient(to bottom, transparent, rgba(0,0,0,0.05));
    pointer-events: none;
}

.project-image img {
    width: 100%;
    height: auto;
    display: block;
    transition: transform var(--transition-medium);
}

.project-card:hover .project-image img {
    transform: scale(1.04);
}

.project-info {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: flex-start;
}

.project-info h3 {
    font-size: clamp(1.5rem, 3vw, 2rem);
    font-weight: 600;
    margin-bottom: var(--space-sm);
    letter-spacing: -0.02em;
}

.project-info p {
    color: var(--text-secondary);
    margin-bottom: var(--space-md);
    font-size: 1.05rem;
    line-height: 1.7;
}

.tech-stack {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: var(--space-lg);
}

.tech-badge {
    font-size: 0.75rem;
    padding: 6px 12px;
    background: rgba(150, 150, 150, 0.1);
    border-radius: 8px;
    color: var(--text-secondary);
    font-weight: 500;
    border: 1px solid var(--surface-border);
    transition: all var(--transition-fast);
}

.tech-badge:hover {
    background: rgba(150, 150, 150, 0.2);
    color: var(--text-primary);
    transform: translateY(-1px);
}

.btn-outline {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 12px 24px;
    border-radius: 999px;
    border: 1px solid var(--surface-border);
    font-size: 0.95rem;
    font-weight: 500;
    transition: all var(--transition-fast);
    background: rgba(255, 255, 255, 0.03);
}

[data-theme="light"] .btn-outline {
    background: rgba(0, 0, 0, 0.02);
}

.btn-outline:hover {
    background: var(--text-primary);
    color: var(--bg-color);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px var(--glow-color);
}

/* =========================================
   About Section
   ========================================= */
.about {
    padding: var(--space-xl) 1.5rem;
    margin-bottom: var(--space-xl);
}

.about-card .card-content {
    padding: clamp(2rem, 6vw, 5rem);
}

.about-grid {
    display: flex;
    flex-direction: column;
    gap: var(--space-xl);
    align-items: center;
}

@media (min-width: 768px) {
    .about-grid {
        flex-direction: row;
        align-items: center;
        gap: clamp(2rem, 5vw, 4rem);
    }
}

.about-image {
    width: 180px;
    height: 180px;
    flex-shrink: 0;
    border-radius: 50%;
    overflow: hidden;
    border: 1px solid var(--surface-border);
    box-shadow: 0 10px 30px var(--glow-color);
    background: var(--surface-border);
    position: relative;
}

.about-image::after {
    content: '';
    position: absolute;
    top: 0; left: 0; width: 100%; height: 100%;
    border-radius: 50%;
    box-shadow: inset 0 0 20px rgba(0,0,0,0.2);
    pointer-events: none;
}

.about-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
    transition: transform var(--transition-medium);
}

.about-image:hover img {
    transform: scale(1.05);
}

.about-text {
    flex: 1;
}

.about-text h2 {
    font-size: clamp(2rem, 4vw, 2.5rem);
    font-weight: 600;
    margin-bottom: var(--space-lg);
    letter-spacing: -0.02em;
}

.about-text p {
    color: var(--text-secondary);
    margin-bottom: var(--space-md);
    font-size: clamp(1rem, 2vw, 1.15rem);
    line-height: 1.8;
}

.about-text strong {
    color: var(--text-primary);
    font-weight: 600;
}

/* =========================================
   Animations & Reveal
   ========================================= */
.reveal {
    opacity: 0;
    transform: translateY(40px) scale(0.98);
    transition: opacity var(--transition-slow), transform var(--transition-slow);
}

.reveal.active {
    opacity: 1;
    transform: translateY(0) scale(1);
}

@media (max-width: 480px) {
    .container {
        padding: 0 1rem;
    }
    .projects {
        padding: var(--space-lg) 1rem;
    }
    .projects-grid {
        gap: var(--space-md);
    }
    .card-content {
        padding: 1.5rem;
    }
    .about-card .card-content {
        padding: 2rem 1.5rem;
    }
    .about-image {
        width: 140px;
        height: 140px;
    }
    .hero-logo {
        width: clamp(140px, 60vw, 250px);
    }
    .hero {
        padding: 4rem 1rem;
    }
}