/* =============================================================================
   MAIN.CSS - Estilos principales
   ============================================================================= */

/* -----------------------------------------------------------------------------
   CSS Variables (Design Tokens)
   ----------------------------------------------------------------------------- */
:root {
    /* Colores primarios */
    --color-primary: #6366f1;
    --color-primary-dark: #4f46e5;
    --color-primary-light: #818cf8;

    /* Colores secundarios */
    --color-secondary: #0ea5e9;
    --color-secondary-dark: #0284c7;

    /* Colores de estado */
    --color-success: #10b981;
    --color-warning: #f59e0b;
    --color-error: #ef4444;

    /* Neutros */
    --color-dark: #0f172a;
    --color-dark-soft: #1e293b;
    --color-gray-900: #111827;
    --color-gray-800: #1f2937;
    --color-gray-700: #374151;
    --color-gray-600: #4b5563;
    --color-gray-500: #6b7280;
    --color-gray-400: #9ca3af;
    --color-gray-300: #d1d5db;
    --color-gray-200: #e5e7eb;
    --color-gray-100: #f3f4f6;
    --color-light: #f8fafc;
    --color-white: #ffffff;

    /* Gradientes */
    --gradient-primary: linear-gradient(135deg, var(--color-primary) 0%, var(--color-secondary) 100%);
    --gradient-dark: linear-gradient(180deg, var(--color-dark) 0%, var(--color-dark-soft) 100%);
    --gradient-hero: linear-gradient(135deg, #0f172a 0%, #1e1b4b 50%, #312e81 100%);

    /* Tipografía */
    --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
    --font-mono: 'JetBrains Mono', 'Fira Code', Consolas, monospace;

    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    --font-size-3xl: 1.875rem;
    --font-size-4xl: 2.25rem;
    --font-size-5xl: 3rem;
    --font-size-6xl: 3.75rem;

    --line-height-tight: 1.25;
    --line-height-base: 1.6;
    --line-height-relaxed: 1.75;

    /* Espaciado */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
    --spacing-3xl: 4rem;
    --spacing-4xl: 6rem;
    --spacing-5xl: 8rem;

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

    /* Sombras */
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
    --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1), 0 8px 10px -6px rgb(0 0 0 / 0.1);
    --shadow-glow: 0 0 40px -10px var(--color-primary);

    /* Transiciones */
    --transition-fast: 150ms ease;
    --transition-base: 300ms ease;
    --transition-slow: 500ms ease;

    /* Z-index */
    --z-dropdown: 10;
    --z-sticky: 50;
    --z-fixed: 100;
    --z-modal: 200;
}

/* -----------------------------------------------------------------------------
   Base Styles
   ----------------------------------------------------------------------------- */
body {
    font-family: var(--font-primary);
    font-size: var(--font-size-base);
    line-height: var(--line-height-base);
    color: var(--color-gray-300);
    background-color: var(--color-dark);
}

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

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

/* -----------------------------------------------------------------------------
   Header & Navigation
   ----------------------------------------------------------------------------- */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: var(--z-fixed);
    background: rgba(15, 23, 42, 0.8);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 70px;
}

.nav__logo a {
    display: flex;
    align-items: center;
    font-size: var(--font-size-xl);
    font-weight: 700;
}

.logo-text {
    color: var(--color-white);
}

.logo-dot {
    color: var(--color-primary);
}

.nav__menu {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.nav__link {
    padding: var(--spacing-sm) var(--spacing-md);
    color: var(--color-gray-400);
    font-size: var(--font-size-sm);
    font-weight: 500;
    border-radius: var(--border-radius-md);
    transition: all var(--transition-fast);
}

.nav__link:hover {
    color: var(--color-white);
    background: rgba(255, 255, 255, 0.05);
}

.nav__link--cta {
    background: var(--gradient-primary);
    color: var(--color-white) !important;
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
}

.nav__link--cta:hover {
    opacity: 0.9;
    transform: translateY(-1px);
}

.nav__toggle {
    display: none;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    width: 44px;
    height: 44px;
    background: transparent;
    border: none;
    cursor: pointer;
    gap: 5px;
}

.nav__toggle span {
    display: block;
    width: 24px;
    height: 2px;
    background-color: var(--color-white);
    transition: all var(--transition-fast);
}

.nav__toggle.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
}

.nav__toggle.active span:nth-child(2) {
    opacity: 0;
}

.nav__toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -5px);
}

/* -----------------------------------------------------------------------------
   Hero Section
   ----------------------------------------------------------------------------- */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    background: var(--gradient-hero);
    overflow: hidden;
    padding-top: 70px;
}

.hero__bg-pattern {
    position: absolute;
    inset: 0;
    background-image:
        radial-gradient(circle at 25% 25%, rgba(99, 102, 241, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 75% 75%, rgba(14, 165, 233, 0.1) 0%, transparent 50%);
    pointer-events: none;
}

.hero__content {
    position: relative;
    text-align: center;
    padding: var(--spacing-4xl) 0;
}

.hero__badge {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-lg);
    background: rgba(99, 102, 241, 0.1);
    border: 1px solid rgba(99, 102, 241, 0.3);
    border-radius: var(--border-radius-full);
    color: var(--color-primary-light);
    font-size: var(--font-size-sm);
    font-weight: 500;
    margin-bottom: var(--spacing-xl);
}

.hero__title {
    font-size: clamp(var(--font-size-3xl), 8vw, var(--font-size-6xl));
    font-weight: 800;
    color: var(--color-white);
    line-height: var(--line-height-tight);
    margin-bottom: var(--spacing-lg);
    letter-spacing: -0.02em;
}

.hero__subtitle {
    font-size: var(--font-size-lg);
    color: var(--color-gray-400);
    max-width: 600px;
    margin: 0 auto var(--spacing-2xl);
    line-height: var(--line-height-relaxed);
}

.hero__cta {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-3xl);
}

.hero__stats {
    display: flex;
    justify-content: center;
    gap: var(--spacing-3xl);
    padding-top: var(--spacing-2xl);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.stat {
    text-align: center;
}

.stat__number {
    display: block;
    font-size: var(--font-size-2xl);
    font-weight: 700;
    color: var(--color-white);
    font-family: var(--font-mono);
}

.stat__label {
    font-size: var(--font-size-sm);
    color: var(--color-gray-500);
}

/* -----------------------------------------------------------------------------
   Buttons
   ----------------------------------------------------------------------------- */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md) var(--spacing-xl);
    font-size: var(--font-size-base);
    font-weight: 600;
    border-radius: var(--border-radius-lg);
    transition: all var(--transition-fast);
    border: none;
    cursor: pointer;
}

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

.btn--primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 0 50px -10px var(--color-primary);
}

.btn--secondary {
    background: rgba(255, 255, 255, 0.05);
    color: var(--color-white);
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.btn--secondary:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: rgba(255, 255, 255, 0.2);
}

.btn--outline {
    background: transparent;
    color: var(--color-primary-light);
    border: 1px solid var(--color-primary);
    padding: var(--spacing-sm) var(--spacing-lg);
}

.btn--outline:hover {
    background: var(--color-primary);
    color: var(--color-white);
}

.btn--full {
    width: 100%;
}

.btn__arrow {
    transition: transform var(--transition-fast);
}

.btn:hover .btn__arrow {
    transform: translateX(4px);
}

.icon {
    font-style: normal;
}

/* -----------------------------------------------------------------------------
   Section Styles
   ----------------------------------------------------------------------------- */
section {
    padding: var(--spacing-5xl) 0;
}

.section__header {
    text-align: center;
    margin-bottom: var(--spacing-3xl);
}

.section__tag {
    display: inline-block;
    padding: var(--spacing-xs) var(--spacing-md);
    background: rgba(99, 102, 241, 0.1);
    color: var(--color-primary-light);
    font-size: var(--font-size-sm);
    font-weight: 600;
    border-radius: var(--border-radius-full);
    margin-bottom: var(--spacing-md);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.section__title {
    font-size: clamp(var(--font-size-2xl), 5vw, var(--font-size-4xl));
    font-weight: 700;
    color: var(--color-white);
    margin-bottom: var(--spacing-md);
}

.section__subtitle {
    font-size: var(--font-size-lg);
    color: var(--color-gray-400);
    max-width: 600px;
    margin: 0 auto;
}

/* -----------------------------------------------------------------------------
   Services Section
   ----------------------------------------------------------------------------- */
.services {
    background: var(--color-dark-soft);
}

.services__grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-lg);
}

.service-card {
    background: var(--color-dark);
    padding: var(--spacing-xl);
    border-radius: var(--border-radius-xl);
    border: 1px solid rgba(255, 255, 255, 0.05);
    transition: all var(--transition-base);
}

.service-card:hover {
    transform: translateY(-4px);
    border-color: rgba(99, 102, 241, 0.3);
    box-shadow: var(--shadow-xl);
}

.service-card__icon {
    width: 56px;
    height: 56px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(99, 102, 241, 0.1);
    border-radius: var(--border-radius-lg);
    font-size: var(--font-size-2xl);
    margin-bottom: var(--spacing-lg);
}

.service-card__title {
    font-size: var(--font-size-xl);
    font-weight: 600;
    color: var(--color-white);
    margin-bottom: var(--spacing-sm);
}

.service-card__desc {
    color: var(--color-gray-400);
    margin-bottom: var(--spacing-lg);
    line-height: var(--line-height-relaxed);
}

.service-card__tags {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
}

.service-card__tags li {
    padding: var(--spacing-xs) var(--spacing-sm);
    background: rgba(255, 255, 255, 0.05);
    border-radius: var(--border-radius-md);
    font-size: var(--font-size-xs);
    color: var(--color-gray-400);
    font-family: var(--font-mono);
}

/* -----------------------------------------------------------------------------
   Projects Section
   ----------------------------------------------------------------------------- */
.projects {
    background: var(--color-dark);
}

.projects__grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: var(--spacing-lg);
}

.project-card {
    background: var(--color-dark-soft);
    padding: var(--spacing-xl);
    border-radius: var(--border-radius-xl);
    border: 1px solid rgba(255, 255, 255, 0.05);
    transition: all var(--transition-base);
    display: flex;
    flex-direction: column;
}

.project-card:hover {
    border-color: rgba(99, 102, 241, 0.3);
}

.project-card--featured {
    grid-column: span 1;
    background: linear-gradient(135deg, rgba(99, 102, 241, 0.1) 0%, rgba(14, 165, 233, 0.1) 100%);
    border-color: rgba(99, 102, 241, 0.2);
}

.project-card__header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-lg);
}

.project-card__status {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    font-size: var(--font-size-xs);
    font-weight: 500;
}

.project-card__status--live {
    color: var(--color-success);
}

.project-card__status--dev {
    color: var(--color-warning);
}

.project-card__type {
    font-size: var(--font-size-xs);
    color: var(--color-gray-500);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.project-card__title {
    font-size: var(--font-size-xl);
    font-weight: 600;
    color: var(--color-white);
    margin-bottom: var(--spacing-sm);
}

.project-card__desc {
    color: var(--color-gray-400);
    margin-bottom: var(--spacing-lg);
    flex-grow: 1;
}

.project-card__tech {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-lg);
}

.project-card__tech span {
    padding: var(--spacing-xs) var(--spacing-sm);
    background: rgba(255, 255, 255, 0.05);
    border-radius: var(--border-radius-md);
    font-size: var(--font-size-xs);
    color: var(--color-gray-400);
    font-family: var(--font-mono);
}

/* -----------------------------------------------------------------------------
   Tech Stack Section
   ----------------------------------------------------------------------------- */
.tech-stack {
    background: var(--color-dark-soft);
}

.tech-stack__grid {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: var(--spacing-xl);
}

.tech-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-lg);
    background: var(--color-dark);
    border-radius: var(--border-radius-xl);
    border: 1px solid rgba(255, 255, 255, 0.05);
    min-width: 120px;
    transition: all var(--transition-fast);
}

.tech-item:hover {
    transform: translateY(-4px);
    border-color: rgba(99, 102, 241, 0.3);
}

.tech-item__icon {
    font-size: var(--font-size-3xl);
}

.tech-item__name {
    font-size: var(--font-size-sm);
    color: var(--color-gray-400);
    font-weight: 500;
}

/* -----------------------------------------------------------------------------
   Contact Section
   ----------------------------------------------------------------------------- */
.contact {
    background: var(--color-dark);
}

.contact__wrapper {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-3xl);
    align-items: start;
}

.contact__info {
    padding-right: var(--spacing-xl);
}

.contact__info .section__tag {
    text-align: left;
}

.contact__info .section__title {
    text-align: left;
    margin-bottom: var(--spacing-lg);
}

.contact__desc {
    color: var(--color-gray-400);
    margin-bottom: var(--spacing-xl);
    line-height: var(--line-height-relaxed);
}

.contact__links {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.contact__link {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    color: var(--color-gray-300);
    font-size: var(--font-size-base);
    transition: color var(--transition-fast);
}

.contact__link:hover {
    color: var(--color-primary-light);
}

.contact__form {
    background: var(--color-dark-soft);
    padding: var(--spacing-xl);
    border-radius: var(--border-radius-xl);
    border: 1px solid rgba(255, 255, 255, 0.05);
}

.form-group {
    margin-bottom: var(--spacing-md);
}

.contact__form input,
.contact__form textarea {
    width: 100%;
    padding: var(--spacing-md);
    background: var(--color-dark);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--border-radius-lg);
    color: var(--color-white);
    font-size: var(--font-size-base);
    transition: border-color var(--transition-fast);
}

.contact__form input::placeholder,
.contact__form textarea::placeholder {
    color: var(--color-gray-500);
}

.contact__form input:focus,
.contact__form textarea:focus {
    outline: none;
    border-color: var(--color-primary);
}

/* -----------------------------------------------------------------------------
   Footer
   ----------------------------------------------------------------------------- */
.footer {
    background: var(--color-gray-900);
    padding: var(--spacing-3xl) 0 var(--spacing-xl);
    border-top: 1px solid rgba(255, 255, 255, 0.05);
}

.footer__content {
    display: flex;
    justify-content: space-between;
    gap: var(--spacing-3xl);
    margin-bottom: var(--spacing-2xl);
}

.footer__brand {
    max-width: 300px;
}

.footer__brand .logo-text {
    font-size: var(--font-size-xl);
    font-weight: 700;
}

.footer__tagline {
    color: var(--color-gray-500);
    margin-top: var(--spacing-sm);
}

.footer__links {
    display: flex;
    gap: var(--spacing-3xl);
}

.footer__col h4 {
    color: var(--color-white);
    font-size: var(--font-size-sm);
    font-weight: 600;
    margin-bottom: var(--spacing-lg);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.footer__col ul {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.footer__col a {
    color: var(--color-gray-400);
    font-size: var(--font-size-sm);
    transition: color var(--transition-fast);
}

.footer__col a:hover {
    color: var(--color-primary-light);
}

.footer__bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: var(--spacing-xl);
    border-top: 1px solid rgba(255, 255, 255, 0.05);
    font-size: var(--font-size-sm);
    color: var(--color-gray-500);
}

.footer__infra {
    display: flex;
    gap: var(--spacing-sm);
    font-family: var(--font-mono);
    font-size: var(--font-size-xs);
}

/* -----------------------------------------------------------------------------
   Animations
   ----------------------------------------------------------------------------- */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.fade-in {
    animation: fadeIn 0.6s ease forwards;
}

/* Stagger animation for cards */
.service-card,
.project-card,
.tech-item {
    opacity: 0;
    transform: translateY(20px);
}

.service-card.visible,
.project-card.visible,
.tech-item.visible {
    animation: fadeIn 0.6s ease forwards;
}