/* ============================================================
   VARIABLES GLOBALES
   Paleta editorial cálida (papel + acento terracota) — deliberadamente
   distinta del cliché "navy + cian + monospace" de portafolio de dev.
   Modificar estas variables cambia el tema en todo el sitio.
============================================================ */
:root {
    /* ── Colores de fondo ── */
    --color-bg:           #f7f5f0;   /* Papel cálido */
    --color-bg-secondary: #efece3;   /* Fondo de secciones alternas */
    --color-bg-card:      #ffffff;   /* Fondo de cards y form inputs */
    --color-bg-dark:      #1c1a17;   /* Fondo oscuro (footer, overlay) */

    /* ── Color de acento (terracota, usado con moderación) ── */
    --color-accent:     #b5451e;
    --color-accent-dim: rgba(181, 69, 30, 0.08);

    /* ── Texto ── */
    --color-text:           #383430; /* Texto general */
    --color-text-secondary: #726c62; /* Texto secundario / labels */
    --color-text-heading:   #1c1a17; /* Títulos y encabezados */
    --color-text-on-dark:   #f7f5f0; /* Texto sobre fondo oscuro */

    /* ── Bordes y sombras ── */
    --color-border:  rgba(28, 26, 23, 0.1);
    --shadow-card:   0 4px 20px rgba(28, 26, 23, 0.08);
    --shadow-hover:  0 10px 28px rgba(28, 26, 23, 0.12);

    /* ── Tipografía: serif editorial para títulos, sans para el resto ── */
    --font-display: 'Fraunces', Georgia, serif;
    --font-main:    'Inter', system-ui, sans-serif;

    /* ── Escala de fuentes ── */
    --fs-xs:   0.75rem;   /*  12px */
    --fs-sm:   0.875rem;  /*  14px */
    --fs-base: 1rem;      /*  16px */
    --fs-lg:   1.125rem;  /*  18px */
    --fs-xl:   1.25rem;   /*  20px */
    --fs-2xl:  1.6rem;    /*  ~26px */
    --fs-3xl:  2.1rem;    /*  ~34px */
    --fs-4xl:  2.5rem;    /*  40px */
    --fs-5xl:  3.6rem;    /*  ~58px */

    /* ── Espaciado ── */
    --space-xs:  0.5rem;
    --space-sm:  1rem;
    --space-md:  1.5rem;
    --space-lg:  2rem;
    --space-xl:  3rem;
    --space-2xl: 5rem;

    /* ── Bordes redondeados — pequeños, sin pill excesivo ── */
    --radius-sm:   4px;
    --radius-md:   8px;
    --radius-lg:   14px;
    --radius-full: 9999px;

    /* ── Transiciones ── */
    --transition:      all 0.2s ease;
    --transition-slow: all 0.5s ease;

    /* ── Altura del navbar fijo ── */
    --navbar-height: 72px;
}


/* ============================================================
   RESET Y ESTILOS BASE
============================================================ */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
    scroll-padding-top: var(--navbar-height);
}

body {
    font-family: var(--font-main);
    background-color: var(--color-bg);
    color: var(--color-text);
    line-height: 1.6;
    overflow-x: hidden;
}

ul { list-style: none; }
img { max-width: 100%; height: auto; display: block; }
a { text-decoration: none; color: inherit; }
button { font-family: var(--font-main); }


/* ============================================================
   UTILITARIOS REUTILIZABLES
============================================================ */
.container {
    max-width: 1240px;
    margin: 0 auto;
    padding: 0 var(--space-lg);
}

.accent { color: var(--color-accent); }

.section { padding: var(--space-2xl) 0; }

.section:nth-child(even) {
    background-color: var(--color-bg-secondary);
}

.section-title {
    font-family: var(--font-display);
    font-weight: 600;
    font-size: var(--fs-3xl);
    color: var(--color-text-heading);
    text-align: center;
    margin-bottom: var(--space-xs);
    letter-spacing: -0.01em;
}

.section-subtitle {
    font-size: var(--fs-base);
    color: var(--color-text-secondary);
    text-align: center;
    margin-bottom: var(--space-2xl);
}


/* ============================================================
   BOTONES
============================================================ */
.btn {
    display: inline-flex;
    align-items: center;
    gap: var(--space-xs);
    padding: 0.8rem 1.75rem;
    border-radius: var(--radius-md);
    font-size: var(--fs-base);
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    border: 1.5px solid transparent;
}

.btn-primary {
    background-color: var(--color-text-heading);
    color: var(--color-bg);
}
.btn-primary:hover {
    background-color: var(--color-accent);
    transform: translateY(-2px);
}

.btn-outline {
    background-color: transparent;
    border-color: var(--color-border);
    color: var(--color-text-heading);
}
.btn-outline:hover {
    border-color: var(--color-text-heading);
    transform: translateY(-2px);
}

.btn-full { width: 100%; justify-content: center; }


/* ============================================================
   NAVBAR
============================================================ */
.navbar {
    position: fixed;
    top: 0; left: 0; right: 0;
    height: var(--navbar-height);
    z-index: 1000;
    transition: var(--transition);
}

.navbar.scrolled {
    background-color: rgba(247, 245, 240, 0.92);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--color-border);
}

.nav-container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 var(--space-lg);
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

/* Logo: solo texto, sin marca/ícono */
.nav-logo {
    font-family: var(--font-display);
    font-size: var(--fs-2xl);
    font-weight: 600;
    color: var(--color-text-heading);
    letter-spacing: -0.02em;
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: var(--space-xl);
}

.nav-link {
    font-size: var(--fs-sm);
    font-weight: 500;
    color: var(--color-text-secondary);
    transition: var(--transition);
    position: relative;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -4px; left: 0;
    width: 0;
    height: 2px;
    background-color: var(--color-accent);
    transition: var(--transition);
}

.nav-link:hover,
.nav-link.active {
    color: var(--color-text-heading);
}
.nav-link:hover::after,
.nav-link.active::after {
    width: 100%;
}

/* ── Hamburguesa (solo en móvil) ── */
.hamburger {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 4px;
}

.bar {
    display: block;
    width: 24px;
    height: 2px;
    background-color: var(--color-text-heading);
    transition: var(--transition);
}

.hamburger.open .bar:nth-child(1) { transform: rotate(45deg)  translate(5px, 5px); }
.hamburger.open .bar:nth-child(2) { opacity: 0; }
.hamburger.open .bar:nth-child(3) { transform: rotate(-45deg) translate(5px, -5px); }


/* ============================================================
   HERO
============================================================ */
.hero {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    position: relative;
    padding: var(--navbar-height) var(--space-lg) 0;
    text-align: center;
}

.hero-container { max-width: 760px; }

.hero-greeting {
    font-size: var(--fs-lg);
    color: var(--color-accent);
    font-weight: 500;
    margin-bottom: var(--space-sm);
}

.hero-name {
    font-family: var(--font-display);
    font-size: var(--fs-5xl);
    font-weight: 600;
    color: var(--color-text-heading);
    line-height: 1.05;
    margin-bottom: var(--space-sm);
    letter-spacing: -0.02em;
}

.hero-role {
    font-size: var(--fs-2xl);
    color: var(--color-text-secondary);
    font-weight: 400;
    margin-bottom: var(--space-md);
}

.hero-role-dynamic {
    color: var(--color-text-heading);
    font-weight: 600;
}

.hero-description {
    font-size: var(--fs-lg);
    color: var(--color-text-secondary);
    max-width: 560px;
    margin: 0 auto var(--space-xl);
    line-height: 1.75;
}

.hero-cta {
    display: flex;
    gap: var(--space-md);
    justify-content: center;
    flex-wrap: wrap;
    margin-bottom: var(--space-xl);
}

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

.social-link {
    font-size: var(--fs-xl);
    color: var(--color-text-secondary);
    transition: var(--transition);
}
.social-link:hover {
    color: var(--color-accent);
    transform: translateY(-3px);
}

.scroll-indicator {
    position: absolute;
    bottom: var(--space-xl);
    left: 50%;
    transform: translateX(-50%);
    color: var(--color-text-secondary);
    font-size: var(--fs-xl);
    animation: bounce 2s infinite;
}
@keyframes bounce {
    0%, 100% { transform: translateX(-50%) translateY(0); }
    50%       { transform: translateX(-50%) translateY(8px); }
}


/* ============================================================
   SOBRE MÍ
============================================================ */
.about-content {
    display: grid;
    grid-template-columns: 1fr 1.5fr;
    gap: var(--space-2xl);
    align-items: center;
}

.about-content.about-no-photo {
    grid-template-columns: 1fr;
    max-width: 720px;
    margin: 0 auto;
}

.about-description {
    color: var(--color-text-secondary);
    font-size: var(--fs-lg);
    line-height: 1.8;
    margin-bottom: var(--space-md);
}

.about-stats {
    display: flex;
    gap: var(--space-md);
    margin: var(--space-xl) 0;
    flex-wrap: wrap;
}

.stat-card {
    background-color: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: var(--space-md) var(--space-lg);
    text-align: center;
    flex: 1;
    min-width: 100px;
}

.stat-number {
    display: block;
    font-family: var(--font-display);
    font-size: var(--fs-3xl);
    font-weight: 600;
    color: var(--color-text-heading);
}
.stat-number.stat-text { font-size: var(--fs-lg); }

.stat-label {
    font-size: var(--fs-xs);
    color: var(--color-text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.04em;
}


/* ============================================================
   SKILLS — lista tipográfica agrupada, sin logos de colores
============================================================ */
.skills-group { margin-bottom: var(--space-xl); }

.skills-group-title {
    font-size: var(--fs-sm);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    color: var(--color-text-secondary);
    margin-bottom: var(--space-md);
}

.skills-row {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-sm);
}

.skill-chip {
    background-color: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-full);
    padding: 0.5rem 1.1rem;
    font-size: var(--fs-sm);
    font-weight: 500;
    color: var(--color-text);
    transition: var(--transition);
}
.skill-chip:hover {
    border-color: var(--color-accent);
    color: var(--color-accent);
}


/* ============================================================
   PROYECTOS
============================================================ */
.projects-intro {
    text-align: left;
    color: var(--color-text-secondary);
    font-size: var(--fs-base);
    max-width: 720px;
    margin: 0 auto var(--space-xl);
    line-height: 1.8;
    border-left: 2px solid var(--color-accent);
    padding-left: var(--space-md);
}

.project-filters {
    display: flex;
    gap: var(--space-sm);
    justify-content: center;
    flex-wrap: wrap;
    margin-bottom: var(--space-xl);
}

.filter-btn {
    padding: 0.4rem 1.2rem;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-full);
    background: var(--color-bg-card);
    color: var(--color-text-secondary);
    font-size: var(--fs-sm);
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
}
.filter-btn:hover,
.filter-btn.active {
    border-color: var(--color-text-heading);
    color: var(--color-text-heading);
    background-color: var(--color-bg-card);
}

.projects-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-lg);
}

.project-card {
    background-color: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    overflow: hidden;
    transition: var(--transition);
}
.project-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-hover);
}

/* Panel de vista previa: tipografía + color de marca del proyecto,
   en vez de una captura de pantalla que se desactualiza. */
.project-preview {
    position: relative;
    overflow: hidden;
    height: 220px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--project-fg, #fff);
    background-color: var(--project-color, #1c1a17);
}

.project-preview-mark {
    font-family: var(--font-display);
    font-size: 4.5rem;
    font-weight: 600;
    letter-spacing: -0.02em;
    opacity: 0.92;
}

.project-links {
    position: absolute;
    inset: 0;
    background: rgba(0, 0, 0, 0.45);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-lg);
    opacity: 0;
    transition: var(--transition);
}
.project-card:hover .project-links { opacity: 1; }

.project-link {
    width: 44px; height: 44px;
    border: 1.5px solid rgba(255, 255, 255, 0.8);
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    font-size: var(--fs-lg);
    transition: var(--transition);
}
.project-link:hover {
    background-color: #fff;
    color: var(--color-text-heading);
}

.project-info { padding: var(--space-lg); }

.project-title {
    font-family: var(--font-display);
    font-size: var(--fs-xl);
    font-weight: 600;
    color: var(--color-text-heading);
    margin-bottom: var(--space-sm);
}

.project-description {
    font-size: var(--fs-sm);
    color: var(--color-text-secondary);
    line-height: 1.7;
    margin-bottom: var(--space-md);
}

.project-tags {
    display: flex;
    gap: var(--space-xs);
    flex-wrap: wrap;
}

.tag {
    font-size: var(--fs-xs);
    font-weight: 500;
    color: var(--color-text-secondary);
    background-color: var(--color-bg-secondary);
    padding: 3px 10px;
    border-radius: var(--radius-full);
}


/* ============================================================
   CONTACTO
============================================================ */
.contact-content {
    display: grid;
    grid-template-columns: 1fr 1.5fr;
    gap: var(--space-2xl);
    align-items: start;
}

.contact-item {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    margin-bottom: var(--space-xl);
}

.contact-icon {
    font-size: var(--fs-xl);
    color: var(--color-accent);
    width: 20px;
    flex-shrink: 0;
}

.contact-icon.available {
    color: #4d8c5a;
    font-size: 0.65rem;
}

.contact-item h4 {
    font-size: var(--fs-sm);
    color: var(--color-text-secondary);
    font-weight: 500;
    margin-bottom: 2px;
}

.contact-item a { transition: var(--transition); }
.contact-item a:hover { color: var(--color-accent); }

.contact-socials {
    display: flex;
    gap: var(--space-md);
    margin-top: var(--space-xl);
}

/* ── Formulario ── */
.contact-form {
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: var(--space-xs);
}

.form-group label {
    font-size: var(--fs-sm);
    color: var(--color-text-secondary);
    font-weight: 500;
}

.form-group input,
.form-group textarea {
    background-color: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: 0.75rem 1rem;
    color: var(--color-text);
    font-family: var(--font-main);
    font-size: var(--fs-base);
    transition: var(--transition);
    resize: vertical;
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--color-accent);
    box-shadow: 0 0 0 3px var(--color-accent-dim);
}

.form-group input::placeholder,
.form-group textarea::placeholder {
    color: var(--color-text-secondary);
    opacity: 0.6;
}

.form-error {
    font-size: var(--fs-xs);
    color: #b3392f;
    min-height: 16px;
}

.form-success {
    text-align: center;
    color: #2f6b3f;
    font-size: var(--fs-base);
    padding: var(--space-sm);
    border: 1px solid #2f6b3f;
    border-radius: var(--radius-md);
    background-color: rgba(47, 107, 63, 0.08);
}
.form-send-error {
    color: #b3392f;
    border-color: #b3392f;
    background-color: rgba(179, 57, 47, 0.08);
}


/* ============================================================
   FOOTER
============================================================ */
.footer {
    background-color: var(--color-bg-dark);
    padding: var(--space-xl) 0;
    text-align: center;
}

.footer-text {
    color: var(--color-text-on-dark);
    font-size: var(--fs-sm);
    margin-bottom: var(--space-xs);
    opacity: 0.85;
}

.footer-year {
    color: var(--color-text-on-dark);
    font-size: var(--fs-xs);
    opacity: 0.55;
}


/* ============================================================
   BOTÓN VOLVER ARRIBA
============================================================ */
.back-to-top {
    position: fixed;
    bottom: var(--space-xl);
    right: var(--space-xl);
    width: 44px; height: 44px;
    background-color: var(--color-text-heading);
    color: var(--color-bg);
    border: none;
    border-radius: var(--radius-full);
    font-size: var(--fs-base);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
    opacity: 0;
    pointer-events: none;
    transform: translateY(10px);
}
.back-to-top.visible {
    opacity: 1;
    pointer-events: auto;
    transform: translateY(0);
}
.back-to-top:hover {
    background-color: var(--color-accent);
    transform: translateY(-3px);
}


/* ============================================================
   ANIMACIÓN DE ENTRADA AL SCROLL
============================================================ */
.reveal {
    opacity: 0;
    transform: translateY(24px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}
.reveal.visible {
    opacity: 1;
    transform: translateY(0);
}


/* ============================================================
   RESPONSIVE — PANTALLAS GRANDES (≤ 1280px)
============================================================ */
@media (max-width: 1280px) {
    .container { padding: 0 var(--space-xl); }
}

/* ============================================================
   RESPONSIVE — LAPTOP / TABLET GRANDE (≤ 1024px)
============================================================ */
@media (max-width: 1024px) {
    .project-preview { height: 190px; }
}

/* ============================================================
   RESPONSIVE — TABLET (≤ 900px)
============================================================ */
@media (max-width: 900px) {
    .about-content {
        grid-template-columns: 1fr;
        text-align: center;
    }
    .about-stats  { justify-content: center; }

    .contact-content { grid-template-columns: 1fr; }
    .contact-socials  { justify-content: center; }
}

/* ============================================================
   RESPONSIVE — TABLET PEQUEÑA / MÓVIL GRANDE (≤ 768px)
============================================================ */
@media (max-width: 768px) {
    :root {
        --fs-5xl:   2.6rem;
        --fs-3xl:   1.75rem;
        --space-2xl: 3.5rem;
    }

    .container        { padding: 0 var(--space-md); }
    .section-title    { font-size: var(--fs-2xl); }
    .section-subtitle { margin-bottom: var(--space-xl); }

    .hamburger { display: flex; }
    .nav-menu {
        position: fixed;
        top: var(--navbar-height);
        left: 0; right: 0;
        background-color: rgba(247, 245, 240, 0.98);
        backdrop-filter: blur(10px);
        flex-direction: column;
        align-items: center;
        padding: var(--space-xl) var(--space-lg);
        gap: var(--space-xl);
        border-bottom: 1px solid var(--color-border);
        transform: translateY(-110%);
        transition: var(--transition);
        z-index: 999;
    }
    .nav-menu.open { transform: translateY(0); }

    .hero-cta { flex-direction: column; align-items: center; }
    .hero-cta .btn { width: 100%; max-width: 280px; justify-content: center; }

    .projects-grid { grid-template-columns: repeat(2, 1fr); }
    .project-preview { height: 150px; }
    .project-preview-mark { font-size: 3rem; }

    .back-to-top { bottom: var(--space-md); right: var(--space-md); }
}

/* ============================================================
   RESPONSIVE — MÓVIL (≤ 600px)
============================================================ */
@media (max-width: 600px) {
    :root {
        --fs-5xl:   2.2rem;
        --fs-3xl:   1.6rem;
        --space-2xl: 3rem;
        --space-xl:  2rem;
    }

    .container { padding: 0 var(--space-sm); }

    .nav-logo { font-size: var(--fs-xl); }

    .hero-name        { font-size: 2.1rem; line-height: 1.15; }
    .hero-role        { font-size: var(--fs-xl); }
    .hero-description { font-size: var(--fs-base); }

    .about-stats { flex-direction: column; }
    .stat-card   { padding: var(--space-sm) var(--space-md); }

    .projects-grid { grid-template-columns: 1fr; }
    .project-preview { height: 170px; }
    .project-filters { gap: var(--space-xs); }
    .filter-btn { padding: 0.35rem 0.9rem; font-size: var(--fs-xs); }

    .contact-item { gap: var(--space-sm); }

    .back-to-top { width: 38px; height: 38px; font-size: var(--fs-sm); }
}

/* ============================================================
   RESPONSIVE — MÓVIL PEQUEÑO (≤ 390px)
============================================================ */
@media (max-width: 390px) {
    :root {
        --fs-5xl:   1.9rem;
        --fs-3xl:   1.4rem;
        --space-2xl: 2.5rem;
    }

    .container { padding: 0 0.75rem; }
    .hero-name  { font-size: 1.8rem; }
    .hero-role  { font-size: var(--fs-lg); }
}