/* =========================================================================
   Quipus Code — Landing page
   Dark theme default (brand) + Light mode toggle
   ========================================================================= */

/* ----------------------------------------------------------- Tipografía */
@font-face { font-family: "Figtree"; font-style: normal; font-weight: 400; font-display: swap;
             src: url("../fonts/figtree-400-latin.woff2") format("woff2"); }
@font-face { font-family: "Figtree"; font-style: normal; font-weight: 500; font-display: swap;
             src: url("../fonts/figtree-500-latin.woff2") format("woff2"); }
@font-face { font-family: "Figtree"; font-style: normal; font-weight: 600; font-display: swap;
             src: url("../fonts/figtree-600-latin.woff2") format("woff2"); }
@font-face { font-family: "Figtree"; font-style: normal; font-weight: 700; font-display: swap;
             src: url("../fonts/figtree-700-latin.woff2") format("woff2"); }
@font-face { font-family: "Figtree"; font-style: normal; font-weight: 800; font-display: swap;
             src: url("../fonts/figtree-800-latin.woff2") format("woff2"); }

/* ----------------------------------------------------------------- Tokens (dark default) */
:root {
    --bg: #081a33;
    --bg-alt: #0b1e3a;
    --bg-card: rgba(255,255,255,.06);
    --bg-hero: radial-gradient(900px 480px at 82% -10%, rgba(74,122,179,.3), transparent 62%),
               radial-gradient(700px 420px at 6% 108%, rgba(35,84,140,.35), transparent 60%),
               linear-gradient(135deg, #081a33 0%, #0f2747 50%, #0b1e3a 100%);
    --bg-contacto: linear-gradient(135deg, #0f2747 0%, #1a3a5c 100%);

    --text: #c8d6e5;
    --text-secondary: #8fb3da;
    --text-muted: #5a7da0;
    --text-heading: #ffffff;
    --text-on-dark: #ffffff;

    --border: rgba(255,255,255,.10);
    --border-hover: rgba(255,255,255,.20);

    --accent: #4a8fd4;
    --accent-light: #6aa8e6;
    --accent-bg: rgba(74,143,212,.10);
    --accent-glow: rgba(74,143,212,.20);

    --wa: #25d366;
    --wa-hover: #1da851;

    --card-shadow: 0 4px 16px rgba(0,0,0,.25);
    --card-shadow-hover: 0 12px 32px rgba(0,0,0,.35);

    --code-bg: #0a1628;
    --code-kw: #c084fc;
    --code-cls: #67e8f9;
    --code-fn: #fbbf24;
    --code-str: #86efac;
    --code-var: #fb923c;
    --code-text: #cbd5e1;

    --transf-antes-bg: rgba(239,68,68,.08);
    --transf-antes-border: rgba(239,68,68,.18);
    --transf-antes-icon: #f87171;
    --transf-despues-bg: rgba(34,197,94,.08);
    --transf-despues-border: rgba(34,197,94,.18);
    --transf-despues-icon: #4ade80;

    --radio: 16px;
    --radio-sm: 10px;
    --trans: .3s cubic-bezier(.4, 0, .2, 1);
    --ancho: 1140px;
    --fuente: "Figtree", ui-sans-serif, system-ui, -apple-system, "Segoe UI", Arial, sans-serif;
}

/* ----------------------------------------------------------------- Light */
[data-theme="light"] {
    --bg: #ffffff;
    --bg-alt: #f5f7fb;
    --bg-card: #ffffff;
    --bg-hero: linear-gradient(160deg, #f8fafc 0%, #edf2f7 100%);
    --bg-contacto: linear-gradient(135deg, #0f2747 0%, #162d50 100%);

    --text: #334155;
    --text-secondary: #475569;
    --text-muted: #94a3b8;
    --text-heading: #0f2747;
    --text-on-dark: #ffffff;

    --border: #e2e8f0;
    --border-hover: #cbd5e1;

    --accent: #23548c;
    --accent-light: #2d6aad;
    --accent-bg: rgba(35,84,140,.06);
    --accent-glow: rgba(35,84,140,.10);

    --card-shadow: 0 2px 8px rgba(15,39,71,.06);
    --card-shadow-hover: 0 8px 24px rgba(15,39,71,.10);

    --transf-antes-bg: #fef2f2;
    --transf-antes-border: #fecaca;
    --transf-antes-icon: #ef4444;
    --transf-despues-bg: #f0fdf4;
    --transf-despues-border: #bbf7d0;
    --transf-despues-icon: #22c55e;
}

/* ----------------------------------------------------------------- Reset */
*, *::before, *::after { box-sizing: border-box; }
[hidden] { display: none !important; }
html { scroll-behavior: smooth; }

body {
    margin: 0;
    font-family: var(--fuente);
    color: var(--text);
    background: var(--bg);
    line-height: 1.7;
    -webkit-font-smoothing: antialiased;
    transition: background .4s ease, color .4s ease;
}

h1, h2, h3, h4 { font-family: var(--fuente); font-weight: 700; letter-spacing: -.02em; margin: 0; color: var(--text-heading); }
em { font-style: normal; }
img { max-width: 100%; display: block; }
a { color: var(--accent); text-decoration: none; transition: color var(--trans); }
a:hover { color: var(--accent-light); }
a:focus-visible, button:focus-visible { outline: 3px solid var(--accent); outline-offset: 2px; }

.solo-lectores {
    position: absolute; width: 1px; height: 1px; overflow: hidden;
    clip: rect(0 0 0 0); white-space: nowrap;
}

.contenedor { max-width: var(--ancho); margin: 0 auto; padding: 0 1.5rem; }

/* ---------------------------------------------------------------- Botones */
.btn {
    display: inline-flex; align-items: center; gap: .5rem;
    border: 1px solid transparent;
    border-radius: 12px;
    padding: .875rem 1.75rem;
    font-family: var(--fuente); font-weight: 600; font-size: 1rem;
    text-decoration: none; cursor: pointer;
    transition: transform var(--trans), box-shadow var(--trans), background var(--trans), color var(--trans), border-color var(--trans);
}
.btn:hover { transform: translateY(-2px); }
.btn:active { transform: scale(.97); }

.btn-primario {
    background: var(--accent); color: #fff;
    box-shadow: 0 8px 24px var(--accent-glow);
}
.btn-primario:hover { background: var(--accent-light); color: #fff; box-shadow: 0 12px 32px var(--accent-glow); }

.btn-fantasma {
    background: rgba(255,255,255,.1); border-color: rgba(255,255,255,.15); color: #fff;
}
[data-theme="light"] .btn-fantasma { background: transparent; border-color: var(--border); color: var(--text-heading); }
.btn-fantasma:hover { background: var(--accent-bg); border-color: var(--accent); color: var(--accent); }

.btn-wa {
    background: var(--wa); color: #fff; border-color: transparent;
    box-shadow: 0 8px 24px rgba(37,211,102,.25);
}
.btn-wa:hover { background: var(--wa-hover); color: #fff; box-shadow: 0 12px 32px rgba(37,211,102,.35); }
[data-theme="light"] .cabecera .btn-wa {
    background: rgba(255,255,255,.08); color: #fff;
    border: 1px solid rgba(255,255,255,.35); box-shadow: none;
}
[data-theme="light"] .cabecera .btn-wa:hover {
    background: rgba(255,255,255,.18);
    border-color: rgba(255,255,255,.6); box-shadow: none;
}

.btn-azul { background: var(--accent); color: #fff; border-color: var(--accent); }
.btn-azul:hover { background: var(--accent-light); border-color: var(--accent-light); }

.btn-sm { padding: .55rem 1rem; font-size: .875rem; border-radius: 10px; }
.btn-lg { padding: 1.125rem 2.5rem; font-size: 1.0625rem; }

/* ---------------------------------------------------------------- Cabecera */
.cabecera {
    position: fixed; top: 0; left: 0; right: 0; z-index: 100;
    background: rgba(10,21,38,.95);
    backdrop-filter: blur(16px) saturate(140%);
    -webkit-backdrop-filter: blur(16px) saturate(140%);
    border-bottom: 1px solid rgba(255,255,255,.06);
    transition: background var(--trans), box-shadow var(--trans), border-color var(--trans);
}
[data-theme="light"] .cabecera {
    background: linear-gradient(to right, #2d1a6e 0%, #161345 40%, #0e1530 70%, #0c1225 100%);
    border-bottom-color: rgba(255,255,255,.06);
}
.cabecera--fija { box-shadow: 0 4px 20px rgba(0,0,0,.30); }
[data-theme="light"] .cabecera--fija { box-shadow: 0 4px 20px rgba(0,0,0,.30); }

.cabecera__fila {
    display: flex; align-items: center; gap: 1.5rem;
    height: 64px;
}

.marca {
    display: flex; align-items: center; gap: .5rem;
    font-family: var(--fuente); font-weight: 700; font-size: 1.15rem;
    color: var(--text-heading); text-decoration: none;
}
.cabecera .marca { color: #fff; }
.marca em { font-style: normal; color: var(--accent); }

.marca__glifo {
    display: flex; align-items: center; justify-content: center;
    width: 36px; height: 36px;
    background: var(--accent);
    border-radius: 10px;
    color: #fff; font-size: .8rem; font-weight: 800;
}
.marca__glifo--imagen { background: none; }
.marca__glifo--imagen img { width: 36px; height: 36px; object-fit: contain; }

.nav {
    display: flex; align-items: center; gap: .25rem;
    margin-left: auto;
}
.nav a {
    position: relative;
    padding: .5rem .75rem;
    color: rgba(255,255,255,.65); font-weight: 500; font-size: .925rem;
    text-decoration: none; border-radius: 8px;
    transition: color var(--trans), background var(--trans);
}
[data-theme="light"] .nav a { color: rgba(255,255,255,.65); }
.nav a:hover, .nav a.activo { color: #fff; }
[data-theme="light"] .nav a:hover, [data-theme="light"] .nav a.activo { color: #fff; }
.nav a::after {
    content: ""; position: absolute; bottom: 2px; left: .75rem; right: .75rem;
    height: 2px; border-radius: 2px;
    background: var(--accent);
    transform: scaleX(0); transition: transform var(--trans);
}
.nav a.activo::after { transform: scaleX(1); }

.cabecera__acciones { display: flex; align-items: center; gap: .75rem; margin-left: .5rem; }

.menu-btn {
    display: none;
    background: none; border: none; padding: .4rem; cursor: pointer;
    color: rgba(255,255,255,.7);
}
[data-theme="light"] .menu-btn { color: var(--text-secondary); }

/* Theme toggle */
.tema-btn {
    display: flex; align-items: center; justify-content: center;
    width: 40px; height: 40px; border-radius: 10px;
    background: transparent; border: 1px solid rgba(255,255,255,.12);
    cursor: pointer; color: rgba(255,255,255,.65);
    transition: all var(--trans);
}
[data-theme="light"] .tema-btn { border-color: rgba(255,255,255,.15); color: rgba(255,255,255,.7); }
.tema-btn:hover { background: var(--accent-bg); color: var(--accent); border-color: var(--accent); }
.tema-icono--sol { display: none; }
[data-theme="light"] .tema-icono--sol { display: block; }
[data-theme="light"] .tema-icono--luna { display: none; }

.progreso {
    position: absolute; bottom: -1px; left: 0; height: 2px;
    width: 100%; transform-origin: left;
    transform: scaleX(0);
    background: linear-gradient(90deg, var(--accent), var(--accent-light));
}

/* ================================================================== HERO */
.hero {
    position: relative; overflow: hidden;
    padding: 10rem 0 6rem;
    background: var(--bg-hero);
}
.hero::before {
    content: ""; position: absolute; inset: 0; pointer-events: none;
    background-image:
        linear-gradient(rgba(255,255,255,.04) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255,255,255,.04) 1px, transparent 1px);
    background-size: 60px 60px;
    mask-image: radial-gradient(ellipse 70% 60% at 50% 40%, #000 20%, transparent 70%);
    -webkit-mask-image: radial-gradient(ellipse 70% 60% at 50% 40%, #000 20%, transparent 70%);
}
[data-theme="light"] .hero::before {
    background-image:
        linear-gradient(rgba(15,39,71,.04) 1px, transparent 1px),
        linear-gradient(90deg, rgba(15,39,71,.04) 1px, transparent 1px);
}

.hero__grid {
    position: relative; z-index: 1;
    display: grid; grid-template-columns: 1fr 1fr;
    gap: 4rem; align-items: center;
}

.hero__texto h1 {
    font-size: clamp(2.5rem, 5.5vw, 4.5rem);
    line-height: 1.05;
    margin-bottom: 1.5rem;
}
.hero__sub {
    font-size: 1.125rem; color: var(--text-secondary);
    max-width: 520px; margin-bottom: 2rem; line-height: 1.65;
}
.hero__acciones { display: flex; flex-wrap: wrap; gap: 1rem; margin-bottom: 2rem; }
.hero__pills { display: flex; flex-wrap: wrap; gap: .5rem; }
.pill {
    display: inline-block;
    background: rgba(255,255,255,.06); border: 1px solid rgba(255,255,255,.12);
    border-radius: 999px; padding: .35rem .9rem;
    font-size: .8rem; color: var(--text-muted); font-weight: 500;
}
[data-theme="light"] .pill { background: var(--accent-bg); border-color: rgba(35,84,140,.12); color: var(--accent); }

/* ------------------------------------------ Hero animation */
.hero__anim { position: relative; min-height: 380px; }

/* Code background */
.anim-code-bg {
    position: absolute; top: 0; left: 0; right: 40%; bottom: 0;
    display: flex; align-items: center; justify-content: center;
    opacity: .85;
    transition: opacity 1s ease;
}
[data-theme="light"] .anim-code-bg { opacity: 1; }
[data-theme="light"] .anim-code {
    background: #0f172a;
    box-shadow: 0 25px 60px rgba(0,0,0,.35);
    border-color: rgba(255,255,255,.10);
}
.anim-code {
    font-family: "Cascadia Code", "Fira Code", "JetBrains Mono", "Consolas", monospace;
    font-size: .75rem; line-height: 1.7;
    color: var(--code-text);
    background: var(--code-bg);
    border-radius: var(--radio);
    padding: 1.5rem;
    border: 1px solid rgba(255,255,255,.10);
    box-shadow: 0 20px 60px rgba(0,0,0,.30);
    white-space: pre; overflow: hidden;
    max-width: 360px;
    transform: perspective(800px) rotateY(-6deg) rotateX(2deg);
}
.c-kw { color: var(--code-kw); }
.c-cls { color: var(--code-cls); }
.c-fn { color: var(--code-fn); }
.c-str { color: var(--code-str); }
.c-var { color: var(--code-var); }

.anim-sistema {
    position: absolute; top: 0; right: 0; bottom: 0; left: 30%;
    display: flex; align-items: center; justify-content: center;
    z-index: 2;
    transition: opacity .8s ease .3s, transform .8s ease .3s;
}

.anim-pantalla {
    width: 320px;
    background: rgba(255,255,255,.06);
    border: 1px solid rgba(255,255,255,.15);
    border-radius: var(--radio); overflow: hidden;
    box-shadow: 0 25px 50px rgba(0,0,0,.40), 0 0 80px var(--accent-glow);
}
[data-theme="light"] .anim-pantalla {
    background: #ffffff;
    border-color: #e2e8f0;
    box-shadow: 0 25px 60px rgba(0,0,0,.18), 0 0 0 1px rgba(0,0,0,.05);
}
.anim-barra {
    display: flex; gap: 6px; padding: 12px 16px;
    background: rgba(255,255,255,.04); border-bottom: 1px solid rgba(255,255,255,.08);
}
[data-theme="light"] .anim-barra { background: #f8fafc; border-bottom-color: #e2e8f0; }
[data-theme="light"] .anim-item { color: #1e293b; }
.anim-barra i {
    width: 10px; height: 10px; border-radius: 50%;
}
.anim-barra i:first-child { background: #ef4444; }
.anim-barra i:nth-child(2) { background: #eab308; }
.anim-barra i:nth-child(3) { background: #22c55e; }

.anim-cuerpo { padding: 1.25rem; display: flex; flex-direction: column; gap: .75rem; }
.anim-item {
    display: flex; align-items: center; gap: .65rem;
    font-size: .95rem; color: var(--text); font-weight: 600;
    opacity: 0; transform: translateX(-12px);
    transition: opacity .5s ease, transform .5s ease;
}
.anim-item svg { color: var(--wa); flex-shrink: 0; }

.hero__anim.fase-2 .anim-item { opacity: 1; transform: translateX(0); }
.hero__anim.fase-2 .anim-item:nth-child(1) { transition-delay: .6s; }
.hero__anim.fase-2 .anim-item:nth-child(2) { transition-delay: .8s; }
.hero__anim.fase-2 .anim-item:nth-child(3) { transition-delay: 1s; }
.hero__anim.fase-2 .anim-item:nth-child(4) { transition-delay: 1.2s; }
.hero__anim.fase-2 .anim-item:nth-child(5) { transition-delay: 1.4s; }

/* Typing cursor animation */
@keyframes parpadeo { 0%, 100% { opacity: 1; } 50% { opacity: 0; } }
.anim-code::after {
    content: "▊"; color: var(--accent-light);
    animation: parpadeo 1s step-end infinite;
}

/* Float animation for code bg */
@keyframes flotar {
    0%, 100% { transform: perspective(800px) rotateY(-6deg) rotateX(2deg) translateY(0); }
    50% { transform: perspective(800px) rotateY(-6deg) rotateX(2deg) translateY(-8px); }
}
.motion .anim-code { animation: flotar 6s ease-in-out infinite; }

/* ============================================================== Secciones */
.seccion { padding: 6rem 0; position: relative; }

.seccion--alt {
    background: var(--bg-alt);
    border-top: 1px solid var(--border);
    border-bottom: 1px solid var(--border);
}

/* Background glow + diagonal stripes for alt sections */
.seccion--alt::before {
    content: ""; position: absolute; inset: 0; pointer-events: none;
    background:
        radial-gradient(600px 300px at 85% -10%, rgba(74,122,179,.12), transparent 60%),
        repeating-linear-gradient(
            -45deg,
            transparent,
            transparent 40px,
            rgba(255,255,255,.018) 40px,
            rgba(255,255,255,.018) 41px
        );
}
[data-theme="light"] .seccion--alt::before {
    background: repeating-linear-gradient(
        -45deg,
        transparent,
        transparent 40px,
        rgba(0,0,0,.018) 40px,
        rgba(0,0,0,.018) 41px
    );
}

/* Section illustration layout */
.seccion__visual {
    display: grid; grid-template-columns: 1fr 1fr; gap: 3rem;
    align-items: center; margin-bottom: 3rem;
}
.seccion__visual--reverse { direction: rtl; }
.seccion__visual > * { direction: ltr; }
.seccion__visual-text h2 {
    font-size: clamp(1.75rem, 3.5vw, 2.75rem);
    line-height: 1.12; margin-bottom: 1rem;
}
.seccion__visual-text p {
    color: var(--text-secondary); font-size: 1.0625rem; line-height: 1.6; margin: 0;
}
.seccion__ilustracion {
    display: flex; align-items: center; justify-content: center;
}
.seccion__ilustracion svg { width: 100%; max-width: 380px; height: auto; }

.seccion__enc {
    text-align: center; max-width: 680px; margin: 0 auto 3.5rem;
}
.seccion__enc h2 {
    font-size: clamp(1.75rem, 3.5vw, 2.75rem);
    line-height: 1.12;
    margin-bottom: 1rem;
}
.seccion__enc p {
    color: var(--text-secondary); font-size: 1.0625rem; line-height: 1.6;
}

/* ============================================================== Problema */
.problema__grid {
    display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1.25rem; margin-bottom: 3rem;
}
.problema__card {
    background: var(--bg-card); border: 1px solid var(--border);
    border-radius: var(--radio); padding: 1.75rem;
    transition: transform var(--trans), border-color var(--trans);
}
.problema__card:hover {
    transform: translateY(-4px);
    border-color: var(--border-hover);
}
.problema__icono {
    color: var(--accent); margin-bottom: 1rem;
}
.problema__card h3 { font-size: 1.1rem; margin-bottom: .5rem; }
.problema__card p { color: var(--text-secondary); font-size: .9rem; line-height: 1.55; margin: 0; }

.problema__cierre {
    text-align: center; font-size: 1.25rem; font-weight: 700;
    margin: 0;
}

/* ======================================================= Transformación */
.transf__grid {
    display: flex; align-items: stretch; justify-content: center;
    gap: 2rem; margin-bottom: 2.5rem;
}
.transf__col {
    flex: 1; max-width: 380px;
    border-radius: var(--radio); padding: 2rem;
    transition: transform var(--trans);
}
.transf__col:hover { transform: translateY(-4px); }
.transf__antes {
    background: var(--transf-antes-bg);
    border: 1px solid var(--transf-antes-border);
}
.transf__despues {
    background: var(--transf-despues-bg);
    border: 1px solid var(--transf-despues-border);
}
.transf__header {
    display: flex; align-items: center; gap: .75rem;
    margin-bottom: 1.25rem;
}
.transf__antes .transf__header svg { color: var(--transf-antes-icon); }
.transf__despues .transf__header svg { color: var(--transf-despues-icon); }
.transf__label {
    font-size: .95rem; font-weight: 700; text-transform: uppercase; letter-spacing: .08em;
    margin: 0;
}
.transf__antes .transf__label { color: var(--transf-antes-icon); }
.transf__despues .transf__label { color: var(--transf-despues-icon); }
.transf__col ul { list-style: none; margin: 0; padding: 0; }
.transf__col li {
    display: flex; align-items: center; gap: .5rem;
    padding: .5rem 0; font-size: .95rem;
    border-bottom: 1px solid rgba(255,255,255,.06);
    color: var(--text);
}
[data-theme="light"] .transf__col li { border-bottom-color: rgba(0,0,0,.06); }
.transf__col li:last-child { border-bottom: none; }
.transf__col li svg { flex-shrink: 0; }
.transf__antes li svg { color: var(--transf-antes-icon); }
.transf__despues li svg { color: var(--transf-despues-icon); }

.transf__flecha {
    display: flex; align-items: center; color: var(--accent);
}

.transf__flujo-svg {
    width: 100%; max-width: 700px; margin: 0 auto 2rem; display: block; opacity: .35;
}
.transf__frase {
    text-align: center; font-size: 1.35rem; font-weight: 700; color: #fff;
    margin: 0;
    padding: 2.5rem 2rem;
    background: linear-gradient(135deg, #0f2747 0%, #1a3a5c 40%, #23548c 70%, #2d6aad 100%);
    border-radius: var(--radio);
    position: relative;
    overflow: hidden;
}
.transf__frase::before {
    content: ""; position: absolute; inset: 0; pointer-events: none;
    background-image:
        linear-gradient(rgba(255,255,255,.06) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255,255,255,.06) 1px, transparent 1px);
    background-size: 40px 40px;
    mask-image: radial-gradient(ellipse 80% 80% at 50% 50%, #000 20%, transparent 80%);
    -webkit-mask-image: radial-gradient(ellipse 80% 80% at 50% 50%, #000 20%, transparent 80%);
}

/* Proyectos grid pattern */
#proyectos {
    position: relative;
}
#proyectos::after {
    content: ""; position: absolute; inset: 0; pointer-events: none;
    background-image:
        linear-gradient(rgba(255,255,255,.035) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255,255,255,.035) 1px, transparent 1px);
    background-size: 60px 60px;
    mask-image: radial-gradient(ellipse 80% 70% at 50% 40%, #000 10%, transparent 70%);
    -webkit-mask-image: radial-gradient(ellipse 80% 70% at 50% 40%, #000 10%, transparent 70%);
}
[data-theme="light"] #proyectos::after {
    background-image:
        linear-gradient(rgba(15,39,71,.04) 1px, transparent 1px),
        linear-gradient(90deg, rgba(15,39,71,.04) 1px, transparent 1px);
}
#proyectos .contenedor { position: relative; z-index: 1; }

/* =========================================================== Proyectos */
.filtros {
    display: flex; flex-wrap: wrap; gap: .5rem;
    justify-content: center; margin-bottom: 2.5rem;
}
.filtro {
    background: var(--bg-card); border: 1px solid var(--border);
    color: var(--text-secondary); border-radius: 10px;
    padding: .5rem 1.15rem; font-family: var(--fuente); font-weight: 500; font-size: .9rem;
    cursor: pointer; transition: all var(--trans);
}
.filtro:hover { border-color: var(--accent); color: var(--accent); background: var(--accent-bg); }
.filtro[aria-pressed="true"] { background: var(--accent); border-color: var(--accent); color: #fff; }

.rejilla-proyectos {
    display: grid; grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 1.5rem;
}

.proyecto {
    background: var(--bg-card); border: 1px solid var(--border);
    border-radius: var(--radio); overflow: hidden;
    transition: transform var(--trans), border-color var(--trans);
}
.proyecto:hover {
    transform: translateY(-6px) scale(1.01);
    border-color: var(--border-hover);
}

.proyecto__media {
    position: relative; overflow: hidden;
    aspect-ratio: 16/10;
    background: rgba(255,255,255,.03);
    border-bottom: 1px solid var(--border);
}
[data-theme="light"] .proyecto__media { background: var(--bg-alt); }
.proyecto__portada {
    width: 100%; height: 100%; object-fit: contain;
    transition: transform .5s ease;
}
.proyecto:hover .proyecto__portada { transform: scale(1.03); }
.proyecto__vacio {
    display: flex; align-items: center; justify-content: center;
    height: 100%; color: var(--text-muted); font-size: .9rem;
}

.proyecto__cuerpo { padding: 1.25rem 1.5rem; }
.proyecto__anio { font-size: .8rem; color: var(--text-muted); margin: 0 0 .25rem; font-weight: 500; }
.proyecto h3 { font-size: 1.1rem; margin-bottom: .75rem; }

.proyecto__tecnica { border-top: 1px solid var(--border); padding-top: .75rem; margin-top: .5rem; }
.proyecto__stack { font-size: .75rem; color: var(--text-muted); margin: 0 0 .4rem; font-weight: 500; }
.chips { display: flex; flex-wrap: wrap; gap: .35rem; }
.chip {
    display: inline-block; padding: .2rem .55rem;
    background: rgba(255,255,255,.06); border: 1px solid rgba(255,255,255,.08);
    border-radius: 6px; font-size: .75rem; color: var(--text); font-weight: 500;
}
[data-theme="light"] .chip { background: var(--accent-bg); border-color: rgba(35,84,140,.12); color: var(--accent); }

.proyecto__pie {
    display: flex; align-items: center; gap: .75rem;
    padding: 0 1.5rem 1.25rem;
}
.proyecto__fotos {
    display: inline-flex; align-items: center; gap: .35rem;
    background: none; border: 1px solid var(--border); border-radius: 8px;
    padding: .4rem .65rem; cursor: pointer;
    color: var(--text-secondary); font-family: var(--fuente); font-size: .8rem;
    transition: all var(--trans);
}
.proyecto__fotos:hover { background: var(--accent-bg); color: var(--accent); border-color: var(--accent); }
.proyecto__fotos-n {
    display: inline-flex; align-items: center; justify-content: center;
    min-width: 20px; height: 20px; border-radius: 999px;
    background: var(--accent); color: #fff; font-size: .7rem; font-weight: 700;
}

.proyecto__wa {
    display: inline-flex; align-items: center; justify-content: center;
    width: 38px; height: 38px; border-radius: 10px;
    background: var(--wa); color: #fff;
    transition: all var(--trans);
    box-shadow: 0 4px 12px rgba(37,211,102,.25);
    margin-left: auto;
}
.proyecto__wa:hover { background: var(--wa-hover); transform: translateY(-2px); box-shadow: 0 8px 20px rgba(37,211,102,.35); }

.paginacion { display: flex; gap: .5rem; justify-content: center; margin-top: 2rem; }
.cargando, .vacio { text-align: center; color: var(--text-muted); grid-column: 1 / -1; }

/* ========================================================== Crecimiento */
.crec__track {
    display: flex; align-items: center; justify-content: center;
    gap: 0; margin-bottom: 2.5rem;
}
.crec__step {
    display: flex; flex-direction: column; align-items: center; gap: .75rem;
    min-width: 100px;
}
.crec__dot {
    width: 20px; height: 20px; border-radius: 50%;
    background: rgba(255,255,255,.08); border: 2px solid var(--border);
    transition: all var(--trans);
}
[data-theme="light"] .crec__dot { background: var(--bg-alt); }
.crec__step span { font-size: .85rem; font-weight: 600; color: var(--text-muted); }
.crec__line {
    flex: 1; height: 2px; min-width: 40px; max-width: 100px;
    background: var(--border);
    margin-top: -18px;
}
.crec__track.activo .crec__dot { background: var(--accent); border-color: var(--accent-light); box-shadow: 0 0 12px var(--accent-glow); }
.crec__track.activo .crec__line { background: var(--accent); }
.crec__track.activo .crec__step span { color: var(--text-heading); }

.crec__msg {
    text-align: center; font-size: 1.1rem; font-weight: 600; color: var(--text-heading);
    margin: 0;
}

/* ========================================================== Habilidades */
.habilidades {
    background: var(--bg-contacto); color: #fff;
    padding: 4rem 0;
}
.habilidades h2 {
    font-size: clamp(1.75rem, 3.2vw, 2.5rem); color: #fff;
    margin-bottom: .5rem; line-height: 1.15; text-align: center;
}
.habilidades__sub {
    text-align: center; color: rgba(255,255,255,.65);
    font-size: 1.0625rem; margin: 0 0 2rem;
}
.habilidades__wrap {
    position: relative; overflow: hidden;
    margin: 0 -2rem 2rem; padding: 1rem 0;
    mask-image: linear-gradient(90deg, transparent, #000 8%, #000 92%, transparent);
    -webkit-mask-image: linear-gradient(90deg, transparent, #000 8%, #000 92%, transparent);
}
.habilidades__track {
    display: flex; gap: 1rem;
    width: max-content;
    animation: habilidades-scroll 40s linear infinite;
}
.habilidades__track:hover { animation-play-state: paused; }
@keyframes habilidades-scroll { to { transform: translateX(-50%); } }

.habilidades__card {
    display: flex; flex-direction: column; align-items: center; justify-content: center;
    gap: .6rem; padding: .9rem 1.4rem;
    border: 1px solid rgba(255,255,255,.1); border-radius: .75rem;
    color: rgba(255,255,255,.75); font-size: .8125rem; font-weight: 500;
    white-space: nowrap; transition: border-color .3s, color .3s, transform .3s;
    flex-shrink: 0;
}
.habilidades__card:hover {
    border-color: rgba(255,255,255,.35); color: #fff;
    transform: translateY(-3px);
}
.habilidades__card svg { flex-shrink: 0; opacity: .6; transition: opacity .3s; }
.habilidades__card:hover svg { opacity: 1; }

.habilidades__msg {
    text-align: center; font-size: 1rem; font-weight: 500;
    color: rgba(255,255,255,.55); margin: 0;
}

/* =========================================================== Servicios */
/* Servicios layout: imagen izquierda + slider vertical derecha */
.servicios__layout {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2.5rem;
    align-items: center;
    margin-top: 2rem;
}
.servicios__ilustracion {
    display: flex; align-items: center; justify-content: center;
}
.servicios__ilustracion img {
    width: 100%; max-width: 420px; height: auto;
}
@media (max-width: 768px) {
    .servicios__layout { grid-template-columns: 1fr; }
    .servicios__ilustracion { display: none; }
}

.servicios__slider-wrap {
    position: relative;
    overflow: hidden;
}
.servicios__track {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    overflow-y: auto;
    max-height: 420px;
    scroll-snap-type: y mandatory;
    scroll-behavior: smooth;
    -ms-overflow-style: none;
    scrollbar-width: none;
    padding: 0.25rem 0;
}
.servicios__track::-webkit-scrollbar { display: none; }

.servicio {
    flex: 0 0 auto;
    scroll-snap-align: start;
    background: linear-gradient(135deg, #0f2747 0%, #162d50 100%);
    border: none;
    border-radius: 0 var(--radio) var(--radio) 0;
    padding: 1.1rem 1.25rem 1.1rem 1.5rem;
    transition: transform var(--trans), box-shadow var(--trans), border-color var(--trans);
    cursor: pointer;
    position: relative;
    overflow: hidden;
    display: flex;
    align-items: center;
    gap: 1.1rem;
    border-left: 4px solid transparent;
}
.servicio::before {
    content: "";
    position: absolute;
    top: 0; right: 0;
    width: 0; height: 0;
    border-style: solid;
    border-width: 0 32px 32px 0;
    border-color: transparent var(--accent) transparent transparent;
    opacity: 0;
    transition: opacity var(--trans);
}
.servicio::after {
    content: "";
    position: absolute; inset: 0; pointer-events: none;
    background-image:
        linear-gradient(rgba(255,255,255,.02) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255,255,255,.02) 1px, transparent 1px);
    background-size: 24px 24px;
    opacity: .5;
}
.servicio:hover {
    transform: translateX(6px);
    box-shadow: 0 4px 20px rgba(0,0,0,.3);
    border-left-color: var(--accent);
}
.servicio:hover::before {
    opacity: .8;
}
[data-theme="light"] .servicio {
    background: linear-gradient(135deg, #0f2747 0%, #162d50 100%);
}
.servicio__icono {
    width: 52px; height: 52px; min-width: 52px;
    display: flex; align-items: center; justify-content: center;
    color: #6aa8e6;
    position: relative;
}
.servicio__icono svg {
    width: 44px; height: 44px;
}
.servicio__texto {
    flex: 1; min-width: 0;
}

.servicio h3 { font-size: .9rem; margin-bottom: .2rem; color: #fff; }
.servicio p { color: rgba(255,255,255,.6); font-size: .75rem; line-height: 1.4; margin: 0; }

.servicios__nav {
    display: flex; justify-content: center; gap: .75rem; margin-top: .75rem;
}
.servicios__btn {
    width: 38px; height: 38px; border-radius: 50%;
    background: var(--bg-card); border: 1px solid var(--border);
    color: var(--text-heading); cursor: pointer;
    display: flex; align-items: center; justify-content: center;
    transition: all var(--trans);
}
.servicios__btn:hover { background: var(--accent); color: #fff; border-color: var(--accent); }
.servicios__dots {
    display: flex; align-items: center; gap: .4rem;
}
.servicios__dot {
    width: 8px; height: 8px; border-radius: 50%;
    background: var(--border); border: none; cursor: pointer;
    transition: all var(--trans); padding: 0;
}
.servicios__dot.activo { background: var(--accent); height: 22px; border-radius: 5px; }

/* ========================================================== Diferencial */
.dif__grid {
    display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 1.5rem;
}
.dif__card {
    background: var(--bg-card); border: 1px solid var(--border);
    border-radius: var(--radio); padding: 2.5rem 2rem;
    text-align: center;
    transition: transform var(--trans), border-color var(--trans);
}
.dif__card:hover { transform: translateY(-4px); border-color: var(--accent); }
.dif__icono {
    color: var(--accent);
    margin: 0 auto 1.5rem;
}
.dif__card h3 { font-size: 1.1rem; margin-bottom: .5rem; }
.dif__card p { color: var(--text-secondary); font-size: .9rem; margin: 0; }

/* ============================================================= Contacto */
.contacto {
    text-align: center;
    background: var(--bg-contacto);
    border-top: 1px solid var(--border);
    color: var(--text-on-dark);
}
.contacto::before {
    content: ""; position: absolute; inset: 0; pointer-events: none;
    background-image:
        linear-gradient(rgba(255,255,255,.05) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255,255,255,.05) 1px, transparent 1px);
    background-size: 60px 60px;
    mask-image: radial-gradient(circle at 50% 45%, #000 20%, transparent 75%);
    -webkit-mask-image: radial-gradient(circle at 50% 45%, #000 20%, transparent 75%);
}
.contacto .contenedor { position: relative; z-index: 1; }
.contacto__svg-wrap { margin-bottom: 2rem; }
.contacto__escudo-svg { width: 120px; margin: 0 auto; display: block; opacity: .5; }
.contacto h2 {
    font-size: clamp(1.75rem, 3.2vw, 2.5rem); color: #fff;
    margin-bottom: 1rem; line-height: 1.15;
}
.contacto p { color: rgba(255,255,255,.75); font-size: 1.0625rem; margin: 0 0 2rem; }
.contacto__nota { font-size: .875rem; color: rgba(255,255,255,.5); margin-top: 1rem !important; }

.contacto__rubros-wrap {
    position: relative; overflow: hidden;
    margin: 0 -2rem 2.5rem; padding: 1rem 0;
    mask-image: linear-gradient(90deg, transparent, #000 8%, #000 92%, transparent);
    -webkit-mask-image: linear-gradient(90deg, transparent, #000 8%, #000 92%, transparent);
}
.contacto__rubros {
    display: flex; gap: 1rem;
    width: max-content;
    animation: rubros-scroll 35s linear infinite;
}
.contacto__rubros:hover { animation-play-state: paused; }
@keyframes rubros-scroll { to { transform: translateX(-50%); } }

.contacto__rubro {
    display: flex; flex-direction: column; align-items: center; justify-content: center;
    gap: .6rem; padding: .9rem 1.4rem;
    border: 1px solid rgba(255,255,255,.1); border-radius: .75rem;
    color: rgba(255,255,255,.75); font-size: .8125rem; font-weight: 500;
    white-space: nowrap; transition: border-color .3s, color .3s, transform .3s;
    flex-shrink: 0;
}
.contacto__rubro:hover {
    border-color: rgba(255,255,255,.35); color: #fff;
    transform: translateY(-3px);
}
.contacto__rubro svg { flex-shrink: 0; opacity: .6; transition: opacity .3s; }
.contacto__rubro:hover svg { opacity: 1; }

.contacto .btn-wa {
    background: #fff; color: #0f2747;
    box-shadow: 0 14px 30px rgba(0,0,0,.25);
}
.contacto .btn-wa:hover {
    background: #f0f4ff; color: #0f2747;
    box-shadow: 0 18px 38px rgba(0,0,0,.30);
}
.contacto .btn-wa svg { color: var(--wa); }

/* ================================================================== Pie */
.pie {
    background: #0a1526; color: rgba(255,255,255,.72);
    padding: 3rem 0 1.6rem; font-size: .9rem;
}
[data-theme="light"] .pie {
    background: #0a1526; color: rgba(255,255,255,.72);
}
.pie__grid {
    display: grid; grid-template-columns: 1.4fr 1fr 1fr;
    gap: 2rem;
}
.pie h4 { color: #fff; font-size: .95rem; margin: 0 0 .8rem; }
.pie a { color: rgba(255,255,255,.72); display: block; padding: .2rem 0; }
.pie a:hover { color: var(--accent-light); }
.pie__legal {
    border-top: 1px solid rgba(255,255,255,.12); margin-top: 2.2rem; padding-top: 1.2rem;
    display: flex; justify-content: center; gap: 1rem 1.6rem; flex-wrap: wrap;
    font-size: .8rem; color: rgba(255,255,255,.5);
}
.pie__legal span:empty { display: none; }
.marca--claro { color: #fff; }

/* ========================================================== FAB WhatsApp */
.fab-wa-wrap {
    position: fixed; bottom: 1.5rem; right: 1.5rem; z-index: 90;
    display: flex; flex-direction: column; align-items: flex-end; gap: .75rem;
}
.fab-wa-msg {
    background: var(--bg-card); color: var(--text); border: 1px solid var(--border); border-radius: 14px;
    padding: 1rem 1.25rem; box-shadow: 0 12px 30px rgba(0,0,0,.25);
    font-size: .9rem; line-height: 1.45;
    opacity: 1; transform: translateY(0);
    transition: opacity .4s ease, transform .4s ease;
}
[data-theme="light"] .fab-wa-msg { background: #fff; box-shadow: 0 12px 30px rgba(0,0,0,.10); }
.fab-wa-msg.oculto { opacity: 0; transform: translateY(8px); pointer-events: none; }
.fab-wa-msg p { margin: 0 0 .5rem; font-weight: 600; }
.fab-wa-msg a {
    color: var(--wa); font-weight: 700; text-decoration: none;
}
.fab-wa-msg a:hover { text-decoration: underline; }

.fab-wa {
    width: 56px; height: 56px; border-radius: 50%;
    background: var(--wa); color: #fff; border: none; cursor: pointer;
    display: flex; align-items: center; justify-content: center;
    box-shadow: 0 8px 24px rgba(37,211,102,.35);
    transition: transform var(--trans), box-shadow var(--trans), background var(--trans);
}
.fab-wa:hover { transform: scale(1.08); background: var(--wa-hover); box-shadow: 0 12px 30px rgba(37,211,102,.45); }

.fab-wa-wrap.replegado .fab-wa { transform: scale(.85); opacity: .5; }
.fab-wa-wrap.replegado .fab-wa-msg { opacity: 0; pointer-events: none; }

/* ============================================================== Modal */
.modal {
    position: fixed; inset: 0; z-index: 200;
    background: rgba(6,14,26,.85); backdrop-filter: blur(8px);
    display: flex; align-items: center; justify-content: center;
    padding: 2rem;
}
[data-theme="light"] .modal { background: rgba(0,0,0,.5); }
.modal__panel {
    position: relative; max-width: 900px; width: 100%;
    background: var(--bg-card); border: 1px solid var(--border);
    border-radius: var(--radio); padding: 1.5rem;
    max-height: 90vh; overflow-y: auto;
    box-shadow: 0 25px 50px rgba(0,0,0,.30);
}
[data-theme="light"] .modal__panel { background: #fff; }
.modal__cerrar {
    position: absolute; top: 1rem; right: 1rem;
    background: none; border: none; color: var(--text-muted);
    font-size: 1.5rem; cursor: pointer; padding: .25rem .5rem;
    border-radius: 6px; transition: color var(--trans);
}
.modal__cerrar:hover { color: var(--text-heading); }
.modal__descripcion { color: var(--text-secondary); margin: 1rem 0 0; font-size: .95rem; line-height: 1.6; }

.visor { position: relative; border-radius: 12px; overflow: hidden; background: rgba(255,255,255,.03); }
[data-theme="light"] .visor { background: var(--bg-alt); }
.visor__grande { width: 100%; display: block; }
.visor__tira { display: flex; gap: .5rem; margin-top: .75rem; overflow-x: auto; padding: .25rem 0; }
.visor__mini {
    flex-shrink: 0; width: 72px; height: 48px; border-radius: 8px;
    overflow: hidden; border: 2px solid transparent;
    cursor: pointer; background: rgba(255,255,255,.03);
    transition: border-color var(--trans);
}
[data-theme="light"] .visor__mini { background: var(--bg-alt); }
.visor__mini img { width: 100%; height: 100%; object-fit: cover; }
.visor__mini[aria-current="true"] { border-color: var(--accent); }
.visor__flecha {
    position: absolute; top: 50%; transform: translateY(-50%);
    background: rgba(0,0,0,.4); backdrop-filter: blur(6px);
    border: 1px solid rgba(255,255,255,.15); border-radius: 50%;
    width: 40px; height: 40px; display: flex; align-items: center; justify-content: center;
    color: #fff; cursor: pointer; transition: background var(--trans);
}
.visor__flecha:hover { background: rgba(0,0,0,.6); }
.visor__flecha--izq { left: .75rem; }
.visor__flecha--der { right: .75rem; }

/* ============================================================== Arriba */
.arriba {
    position: fixed; bottom: 1.5rem; left: 1.5rem; z-index: 90;
    width: 44px; height: 44px; border-radius: 50%;
    background: var(--bg-card); border: 1px solid var(--border);
    color: var(--text-heading); cursor: pointer;
    display: flex; align-items: center; justify-content: center;
    opacity: 0; transform: translateY(12px);
    transition: opacity var(--trans), transform var(--trans), background var(--trans);
}
.arriba.visible { opacity: 1; transform: translateY(0); }
.arriba:hover { background: var(--accent-bg); color: var(--accent); }

/* ========================================================== Reveal anim */
.motion .revela {
    opacity: 0; transform: translateY(20px);
    transition: opacity .6s ease var(--retardo, 0ms), transform .6s ease var(--retardo, 0ms);
}
.motion .revela.dentro { opacity: 1; transform: none; }

.motion .titulo-palabra {
    display: inline-block;
    opacity: 0; transform: translateY(18px);
    transition: opacity .5s ease var(--retardo, 0ms), transform .5s ease var(--retardo, 0ms);
}
.motion .titulo-palabra.dentro { opacity: 1; transform: none; }

.motion .hero__anim .anim-sistema { opacity: 0; transform: scale(.85); }
.motion .hero__anim.fase-2 .anim-sistema { opacity: 1; transform: scale(1); }
.motion .hero__anim.fase-2 .anim-code-bg { opacity: .85; }
[data-theme="light"] .motion .hero__anim.fase-2 .anim-code-bg { opacity: 1; }

/* ========================================================== Responsive */
@media (max-width: 900px) {
    .seccion__visual { grid-template-columns: 1fr; gap: 2rem; }
    .seccion__visual--reverse { direction: ltr; }
    .seccion__ilustracion svg { max-width: 280px; }

    .hero { padding: 7rem 0 4rem; }
    .hero__grid { grid-template-columns: 1fr; gap: 2.5rem; }
    .hero__anim { min-height: 320px; }

    .menu-btn { display: block; margin-left: auto; }
    .cabecera__wa { display: none; }
    .nav {
        position: absolute; top: 64px; left: 0; right: 0;
        flex-direction: column; padding: 1rem;
        background: rgba(10,21,38,.97); backdrop-filter: blur(16px);
        border-bottom: 1px solid rgba(255,255,255,.08);
        box-shadow: 0 12px 30px rgba(0,0,0,.30);
    }
    [data-theme="light"] .nav {
        background: #060E46;
        border-bottom-color: rgba(255,255,255,.06);
        box-shadow: 0 12px 30px rgba(0,0,0,.30);
    }
    .nav a { padding: .75rem 1rem; border-radius: 8px; width: 100%; }
    .nav a:hover { background: var(--accent-bg); }

    .transf__grid { flex-direction: column; align-items: center; }
    .transf__flecha { transform: rotate(90deg); }
    .transf__col { max-width: 100%; }

    .pie__grid { grid-template-columns: 1fr 1fr; }
    .seccion { padding: 4rem 0; }

    .crec__track { flex-wrap: wrap; }
}

@media (max-width: 600px) {
    .hero__texto h1 { font-size: 2.25rem; }
    .hero__acciones { flex-direction: column; }
    .hero__acciones .btn { width: 100%; justify-content: center; }
    .rejilla-proyectos { grid-template-columns: 1fr; }
    .problema__grid { grid-template-columns: 1fr; }
    .pie__grid { grid-template-columns: 1fr; }
    .anim-pantalla { width: 260px; }
    .anim-code { font-size: .65rem; max-width: 280px; padding: 1rem; }
}