/* Premium Base Styles & Reset */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

html, body {
    overflow-x: hidden;
    width: 100%;
    max-width: 100vw;
    position: relative;
}

html {
    scroll-behavior: smooth;
}

/* Global transition during theme switch */
.theme-transitioning,
.theme-transitioning * {
    transition: all var(--transition-speed) var(--ease-out-expo) !important;
}

body {
    background-color: var(--bg-primary);
    color: var(--text-primary);
    font-family: var(--font-secondary);
    line-height: 1.6;
    transition: background-color var(--transition-speed) var(--ease-out-expo), 
                color var(--transition-speed) var(--ease-out-expo),
                border-color var(--transition-speed) var(--ease-out-expo);
    overflow-x: hidden;
    position: relative;
}

body::before {
    content: '';
    position: fixed;
    top: 0; left: 0; width: 100vw; height: 100vh;
    background-image: 
        radial-gradient(circle at 15% 50%, var(--radial-gradient-1), transparent 25%),
        radial-gradient(circle at 85% 30%, var(--radial-gradient-2), transparent 25%);
    background-size: 100vw 100vh;
    z-index: -10;
    pointer-events: none;
}

/* Custom Scrollbar for premium feel */
::-webkit-scrollbar {
    width: 6px;
}
::-webkit-scrollbar-track {
    background: var(--bg-secondary);
}
::-webkit-scrollbar-thumb {
    background: var(--glass-border);
    border-radius: 10px;
}
::-webkit-scrollbar-thumb:hover {
    background: var(--accent-blue);
}

h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-primary);
    font-weight: 700;
    line-height: 1.2;
    letter-spacing: -0.02em;
}

a {
    text-decoration: none;
    color: inherit;
    transition: all var(--transition-speed) var(--ease-out-expo);
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

/* Glassmorphism Utilities */
.glass {
    background: var(--glass-bg);
    backdrop-filter: blur(var(--glass-blur));
    -webkit-backdrop-filter: blur(var(--glass-blur));
    border: 1px solid var(--glass-border);
    box-shadow: var(--card-shadow);
    transition: background-color var(--transition-speed) var(--ease-out-expo),
                border-color var(--transition-speed) var(--ease-out-expo),
                box-shadow var(--transition-speed) var(--ease-out-expo);
}

.glass-strong {
    background: var(--glass-bg-strong);
    backdrop-filter: blur(30px);
    -webkit-backdrop-filter: blur(30px);
    border: 1px solid var(--border-glow);
}

/* Typography Utilities */
.text-gradient {
    background: var(--gradient-main);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    display: inline-block;
}

.subtitle {
    font-family: var(--font-secondary);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--accent-blue);
    margin-bottom: var(--spacing-sm);
    display: block;
}

/* Layout System */
.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: var(--z-header);
    transition: all var(--transition-speed);
}

.header-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 0;
}

.logo {
    display: flex;
    align-items: center;
    gap: 5px;
    font-size: 1.5rem;
    font-family: var(--font-primary);
    text-decoration: none;
}

.nav-links {
    list-style: none;
    display: flex;
    gap: 30px;
    align-items: center;
    margin: 0;
    padding: 0;
}

.nav-links a {
    color: var(--text-primary);
    font-size: 0.95rem;
    font-weight: 500;
}

.nav-links a:hover {
    color: var(--accent-blue);
}

.theme-btn {
    background: none;
    border: none;
    color: var(--text-primary);
    font-size: 1.2rem;
    cursor: pointer;
    padding: 5px;
    transition: color var(--transition-speed);
}

.theme-btn:hover {
    color: var(--accent-purple);
}

.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

.section-padding {
    padding: var(--spacing-xl) 0;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 16px 32px;
    border-radius: var(--radius-xl);
    font-family: var(--font-secondary);
    font-weight: 600;
    font-size: 1rem;
    cursor: pointer;
    border: none;
    text-decoration: none;
    transition: all var(--transition-speed) var(--ease-out-expo);
    position: relative;
    overflow: hidden;
    z-index: 1;
}

.btn-primary {
    background: var(--gradient-main);
    color: #ffffff;
    box-shadow: var(--shadow-glow);
}

.btn-primary::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0; bottom: 0;
    background: linear-gradient(135deg, var(--accent-purple), var(--accent-blue));
    z-index: -1;
    transition: opacity var(--transition-speed);
    opacity: 0;
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 15px 30px rgba(56, 189, 248, 0.4);
}

.btn-primary:hover::before {
    opacity: 1;
}

.btn-outline {
    background: transparent;
    color: var(--text-primary);
    border: 1px solid var(--border-glow);
    backdrop-filter: blur(10px);
}

.btn-outline:hover {
    background: var(--glass-border);
    border-color: var(--accent-blue);
    transform: translateY(-3px);
}

/* Animations */
.animate-fade-in {
    animation: fadeIn 0.8s var(--ease-out-expo) forwards;
}

.animate-slide-up {
    opacity: 0;
    animation: slideUp 0.8s var(--ease-out-expo) forwards;
}

.delay-100 { animation-delay: 0.1s; }
.delay-200 { animation-delay: 0.2s; }
.delay-300 { animation-delay: 0.3s; }

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes glowPulse {
    0% { box-shadow: 0 0 10px rgba(56, 189, 248, 0.2); }
    50% { box-shadow: 0 0 20px rgba(56, 189, 248, 0.6); }
    100% { box-shadow: 0 0 10px rgba(56, 189, 248, 0.2); }
}

@keyframes meshWarp {
    0% { transform: translate(0, 0) scale(1); }
    33% { transform: translate(-2%, 2%) scale(1.05); }
    66% { transform: translate(2%, -2%) scale(0.95); }
    100% { transform: translate(0, 0) scale(1); }
}

/* Hamburger Menu Button */
.hamburger-menu {
    display: none;
    background: transparent;
    border: none;
    cursor: pointer;
    padding: 10px;
    z-index: calc(var(--z-header) + 10);
    font-size: 1.5rem;
    color: var(--text-primary);
    transition: transform var(--transition-speed) ease, color var(--transition-speed) ease;
}

.hamburger-menu:hover {
    transform: scale(1.1);
}

/* Hamburger Active State (X) */
.nav-active .hamburger-menu {
    color: var(--accent-blue);
    transform: rotate(90deg);
}

/* Universal Section Headers */
.section-header {
    text-align: center;
    margin-bottom: var(--spacing-xl);
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}

.section-header h2 {
    font-size: clamp(2rem, 5vw, 3.5rem);
    margin-bottom: var(--spacing-sm);
}

.section-header p {
    font-size: 1.1rem;
    color: var(--text-secondary);
}

/* Responsive Overrides */
@media (max-width: 768px) {
    :root {
        --spacing-xl: 4rem;
        --spacing-md: 1.5rem;
    }
    
    .hamburger-menu {
        display: block;
    }

    .nav-links {
        position: fixed;
        top: 0;
        left: 0;
        width: 100%;
        height: 100vh;
        background: var(--glass-bg-strong);
        backdrop-filter: blur(40px);
        -webkit-backdrop-filter: blur(40px);
        flex-direction: column;
        justify-content: center;
        align-items: center;
        gap: 2rem;
        opacity: 0;
        pointer-events: none;
        transition: all 0.4s var(--ease-out-expo);
        z-index: var(--z-header);
        transform: translateY(-10px);
    }

    .nav-active .nav-links {
        opacity: 1;
        pointer-events: auto;
        transform: translateY(0);
    }
    
    .nav-links li {
        opacity: 0;
        transform: translateY(10px);
        transition: all 0.4s ease;
    }
    
    .nav-active .nav-links li {
        opacity: 1;
        transform: translateY(0);
    }
    
    .nav-links a {
        font-size: 1.5rem;
        font-family: var(--font-primary);
    }
    
    .portfolio-grid, 
    .contact-container, 
    .contact-grid {
        grid-template-columns: 1fr !important; /* Fuerza una sola columna */
        width: 100% !important;
        max-width: 100vw !important;
        padding-left: 15px !important;
        padding-right: 15px !important;
        box-sizing: border-box !important;
    }
    
    /* Prevenir que imágenes o tarjetas se salgan del marco */
    img, .project-card, .contact-form, .info-card {
        max-width: 100% !important;
        box-sizing: border-box !important;
    }
}

/* Ocultar menú hamburguesa en Escritorio */
@media (min-width: 769px) {
    #hamburger, .hamburger-menu {
        display: none !important;
    }
}