/* ==========================================================================
   @mateodeveloper · Manual de marca v1.0
   Papel 60% · Tinta 30% · Cobalto 10%
   ========================================================================== */

:root {
    /* Principales */
    --papel: #E9E8E3;
    --tinta: #141413;
    --cobalto: #1F3FE0;

    /* Secundarios y de apoyo */
    --noche: #121211;
    --hueso: #ECEBE5;
    --piedra: #6F6D66;
    --cobalto-claro: #7F97FF;
    --alerta: #D2402F;
    --blanco: #FFFFFF;

    /* Tokens de uso — modo claro (papel) */
    color-scheme: light;
    --bg: var(--papel);
    --fg: var(--tinta);
    --muted: var(--piedra);
    --accent: var(--cobalto);          /* la palabra que importa */
    --fill: var(--cobalto);            /* botones y cierre en cobalto */
    --on-fill: var(--blanco);
    --surface: var(--blanco);          /* burbujas, ventanas, inputs */
    --surface-2: var(--hueso);
    --night-bg: var(--noche);
    --night-fg: var(--hueso);
    --night-accent: var(--cobalto-claro);
    --topbar-bg: rgba(233, 232, 227, 0.88);
    --soft-line: rgba(20, 20, 19, 0.15);
    --fg-30: rgba(20, 20, 19, 0.3);
    --shadow-color: rgba(20, 20, 19, 0.45);

    /* Tipografías */
    --f-titular: "Archivo", "Arial Black", Impact, sans-serif;
    --f-acento: "Instrument Serif", Georgia, "Times New Roman", serif;
    --f-texto: "Instrument Sans", system-ui, -apple-system, "Segoe UI", sans-serif;
    --f-mano: "Caveat", "Segoe Print", cursive;
    --f-mono: ui-monospace, "SFMono-Regular", Menlo, Consolas, monospace;

    /* Medidas */
    --max: 1200px;
    --gutter: clamp(1rem, 5vw, 4rem);
    --section-y: clamp(4.5rem, 9vw, 8rem);
    --radius: 16px;
    --line: 1.5px solid var(--fg);
    --shadow-long: 0 30px 60px -24px var(--shadow-color);
    --topbar-h: 4.25rem;
}

/* Modo oscuro — noche, hueso y cobalto claro como acento */
:root[data-theme="dark"] {
    color-scheme: dark;
    --bg: var(--noche);
    --fg: var(--hueso);
    --muted: #A3A199;
    --accent: var(--cobalto-claro);
    --fill: var(--cobalto);
    --on-fill: var(--blanco);
    --surface: #1D1D1B;
    --surface-2: #272725;
    --night-bg: #1B1B19;
    --night-fg: var(--hueso);
    --night-accent: var(--cobalto-claro);
    --topbar-bg: rgba(18, 18, 17, 0.88);
    --soft-line: rgba(236, 235, 229, 0.15);
    --fg-30: rgba(236, 235, 229, 0.3);
    --shadow-color: rgba(0, 0, 0, 0.7);
}

:root[data-theme="dark"] .code-window,
:root[data-theme="dark"] .bubble {
    border: 1px solid rgba(236, 235, 229, 0.1);
}

body,
.section--night,
.topbar,
.btn,
.bubble,
.browser {
    transition: background-color 0.3s ease, color 0.3s ease, border-color 0.3s ease, transform 0.3s ease;
}

/* ---------- Base ---------- */

*,
*::before,
*::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    scroll-padding-top: calc(var(--topbar-h) + 1rem);
    scrollbar-width: thin;
    scrollbar-color: var(--fg) var(--bg);
    -webkit-text-size-adjust: 100%;
}

html,
body {
    overflow-x: hidden;
}

body {
    background-color: var(--bg);
    color: var(--fg);
    font-family: var(--f-texto);
    font-size: 1.0625rem;
    font-weight: 400;
    line-height: 1.55;
    -webkit-font-smoothing: antialiased;
}

img,
svg {
    display: block;
    max-width: 100%;
}

a {
    color: inherit;
    text-decoration: none;
}

ul,
ol {
    list-style: none;
}

button,
input,
textarea {
    font: inherit;
    color: inherit;
}

::selection {
    background: var(--fill);
    color: var(--on-fill);
}

:focus-visible {
    outline: 2px solid var(--accent);
    outline-offset: 3px;
}

::-webkit-scrollbar {
    width: 12px;
}

::-webkit-scrollbar-track {
    background-color: var(--bg);
}

::-webkit-scrollbar-thumb {
    background: var(--fg);
    border-radius: 1rem;
    border: 3px solid var(--bg);
}

::-webkit-scrollbar-thumb:hover {
    background: var(--fill);
}

.inner {
    width: 100%;
    max-width: calc(var(--max) + var(--gutter) * 2);
    margin: 0 auto;
    padding: 0 var(--gutter);
}

/* ---------- Tipografía de marca ---------- */

/* Etiqueta: Instrument Sans 600, mayúsculas, +6% */
.label {
    font-family: var(--f-texto);
    font-size: 0.8125rem;
    font-weight: 600;
    letter-spacing: 0.07em;
    text-transform: uppercase;
    line-height: 1.3;
}

/* Fórmula del titular: Archivo 900 en mayúsculas + remate en serif itálica */
.headline {
    font-family: var(--f-titular);
    font-weight: 900;
    text-transform: uppercase;
    letter-spacing: -0.035em;
    line-height: 0.9;
    font-size: clamp(2.4rem, 6.2vw, 5.4rem);
    text-align: left;
    text-wrap: balance;
}

.headline .accent {
    display: block;
    font-family: var(--f-acento);
    font-style: italic;
    font-weight: 400;
    text-transform: none;
    letter-spacing: -0.01em;
    line-height: 1;
    font-size: 1.28em;
    color: var(--accent);
    margin-top: 0.06em;
}

.lead {
    font-size: clamp(1.1rem, 1.6vw, 1.3rem);
    font-weight: 500;
    line-height: 1.45;
    max-width: 36rem;
}

/* Nota a mano: Caveat 600, levemente rotada, con flecha */
.hand-note {
    font-family: var(--f-mano);
    font-weight: 600;
    font-size: clamp(1.5rem, 2.4vw, 2.1rem);
    line-height: 1.05;
    transform: rotate(-4deg);
    pointer-events: none;
    white-space: nowrap;
}

.hand-arrow {
    width: 3.4rem;
    height: auto;
    stroke: currentColor;
    stroke-width: 3;
    stroke-linecap: round;
    stroke-linejoin: round;
}

/* ---------- Botones ---------- */

.btn-group {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.55rem;
    min-height: 3.25rem;
    padding: 0 1.6rem;
    border-radius: 999px;
    border: var(--line);
    font-family: var(--f-texto);
    font-size: 0.875rem;
    font-weight: 600;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    line-height: 1;
    white-space: nowrap;
    cursor: pointer;
    transition: background-color 0.2s ease, color 0.2s ease, border-color 0.2s ease, transform 0.2s ease;
}

.btn:hover {
    transform: translateY(-2px);
}

.btn:active {
    transform: translateY(0);
}

.btn i {
    font-size: 0.75em;
}

.btn-sm {
    min-height: 2.6rem;
    padding: 0 1.15rem;
    font-size: 0.75rem;
}

.btn-cobalt {
    background: var(--fill);
    border-color: var(--fill);
    color: var(--on-fill);
}

.btn-cobalt:hover {
    background: var(--fg);
    border-color: var(--fg);
}

.btn-ink {
    background: var(--fg);
    color: var(--bg);
}

.btn-ink:hover {
    background: var(--fill);
    border-color: var(--fill);
    color: var(--on-fill);
}

.btn-outline {
    background: transparent;
    color: var(--fg);
}

.btn-outline:hover {
    background: var(--fg);
    color: var(--bg);
}

.btn:disabled {
    cursor: not-allowed;
    opacity: 0.6;
    transform: none;
}

/* ---------- Barra superior ---------- */

.topbar {
    position: fixed;
    inset: 0 0 auto 0;
    z-index: 1000;
    background: var(--topbar-bg);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-bottom: 1.5px solid transparent;
    transition: border-color 0.25s ease;
}

.topbar.scrolled {
    border-bottom-color: var(--fg);
}

.topbar-inner {
    display: flex;
    align-items: center;
    gap: 2rem;
    height: var(--topbar-h);
}

.handle {
    font-size: 0.875rem;
    white-space: nowrap;
}

.topbar nav {
    margin-left: auto;
}

.nav-links {
    display: flex;
    gap: 1.6rem;
}

.nav-links a {
    position: relative;
    font-size: 0.9375rem;
    font-weight: 500;
    white-space: nowrap;
    padding: 0.25rem 0;
}

.nav-links a::after {
    content: "";
    position: absolute;
    left: 0;
    bottom: -2px;
    width: 100%;
    height: 2px;
    background: var(--fill);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 0.25s ease;
}

.nav-links a:hover::after {
    transform: scaleX(1);
}

.menu-toggle {
    display: none;
    width: 2.75rem;
    height: 2.75rem;
    border: var(--line);
    border-radius: 50%;
    background: transparent;
    cursor: pointer;
    font-size: 1.1rem;
}

/* ---------- Secciones ---------- */

.section {
    position: relative;
    padding: var(--section-y) 0;
}

.section-bar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: 1rem;
    border-top: var(--line);
    margin-bottom: clamp(2rem, 4vw, 3.5rem);
}

.section-head {
    position: relative;
    display: flex;
    flex-wrap: wrap;
    align-items: flex-end;
    justify-content: space-between;
    gap: 1.5rem 3rem;
    margin-bottom: clamp(2.5rem, 5vw, 4.5rem);
}

.section-intro {
    max-width: 24rem;
    font-size: 1.125rem;
    font-weight: 500;
    line-height: 1.45;
}

/* ---------- 01 · Portada ---------- */

.hero {
    min-height: 100vh;
    min-height: 100svh;
    display: flex;
    align-items: center;
    padding-top: calc(var(--topbar-h) + 3rem);
    padding-bottom: 2.5rem;
}

.hero-grid {
    display: grid;
    grid-template-columns: minmax(0, 1.35fr) minmax(0, 0.85fr);
    align-items: center;
    gap: clamp(2.5rem, 6vw, 6rem);
}

.hero-text {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    gap: 1.75rem;
}

.hero-kicker {
    color: var(--muted);
}

.headline--hero {
    font-size: clamp(2rem, 4.6vw, 4rem);
}

.headline--hero .accent {
    min-height: 1.05em;
}

.typewrite > .wrap {
    border-right: 0.05em solid currentColor;
    padding-right: 0.04em;
}

.socials {
    display: flex;
    gap: 0.75rem;
}

.socials a {
    display: grid;
    place-items: center;
    width: 2.9rem;
    height: 2.9rem;
    border: var(--line);
    border-radius: 50%;
    transition: background-color 0.2s ease, color 0.2s ease, border-color 0.2s ease;
}

.socials svg {
    width: 1.1rem;
    height: 1.1rem;
}

.socials a:hover {
    background: var(--fill);
    border-color: var(--fill);
    color: var(--on-fill);
}

.hero-visual {
    position: relative;
    justify-self: center;
    width: min(100%, 22rem);
    margin-bottom: 2rem;
}

.photo-frame {
    transform: rotate(-3deg);
    border-radius: var(--radius);
    border: var(--line);
    background: var(--surface);
    padding: 0.6rem;
    box-shadow: var(--shadow-long);
}

.photo-frame img {
    width: 100%;
    height: auto;
    aspect-ratio: 1 / 1;
    object-fit: cover;
    object-position: center;
    border-radius: calc(var(--radius) - 6px);
    cursor: pointer;
    user-select: none;
}

/* Sello: píldora negra con check cobalto, rotada -4° */
.stamp {
    position: absolute;
    left: -1.5rem;
    bottom: -1.1rem;
    display: inline-flex;
    align-items: center;
    gap: 0.6rem;
    padding: 0.5rem 1.1rem 0.5rem 0.5rem;
    border-radius: 999px;
    background: var(--fg);
    color: var(--bg);
    font-size: 0.75rem;
    font-weight: 600;
    letter-spacing: 0.07em;
    text-transform: uppercase;
    white-space: nowrap;
    transform: rotate(-4deg);
    box-shadow: 0 12px 24px -12px rgba(20, 20, 19, 0.6);
}

.stamp-check {
    display: grid;
    place-items: center;
    width: 1.6rem;
    height: 1.6rem;
    border-radius: 50%;
    background: var(--fill);
    color: var(--on-fill);
    font-size: 0.7rem;
}

.hand-note--hero {
    position: absolute;
    top: -1.5rem;
    left: -6.5rem;
    display: flex;
    flex-direction: column;
    align-items: flex-start;
}

.hand-note--hero .hand-arrow {
    margin-left: 2.4rem;
    margin-top: 0.15rem;
    transform: scaleX(-1) rotate(-20deg);
}

/* Easter egg: burbuja de marca (cobalto) */
.egg-bubble {
    position: absolute;
    top: calc(100% + 0.75rem);
    left: 50%;
    width: max-content;
    max-width: min(80vw, 18rem);
    transform: translate(-50%, 0.5rem) scale(0.95);
    background-color: var(--fill);
    color: var(--on-fill);
    padding: 0.7rem 1.1rem;
    border-radius: 18px 18px 18px 4px;
    font-size: 0.9375rem;
    font-weight: 500;
    opacity: 0;
    pointer-events: none;
    transition: 0.3s ease;
    z-index: 10;
}

.egg-bubble.show {
    opacity: 1;
    transform: translate(-50%, 0) scale(1);
}

@keyframes egg-wiggle {
    0% { transform: rotate(0deg) scale(1); }
    20% { transform: rotate(-6deg) scale(1.03); }
    40% { transform: rotate(5deg) scale(1.03); }
    60% { transform: rotate(-4deg) scale(1.01); }
    80% { transform: rotate(3deg) scale(1.01); }
    100% { transform: rotate(0deg) scale(1); }
}

.egg-wiggle {
    animation: egg-wiggle 0.6s ease-in-out;
}

.hero-foot {
    display: flex;
    justify-content: space-between;
    align-items: flex-end;
    gap: 2rem;
    margin-top: clamp(3rem, 6vw, 5rem);
    padding-top: 1rem;
    border-top: var(--line);
}

.hero-foot p {
    max-width: 34rem;
    font-size: 1rem;
    font-weight: 500;
}

.hero-foot strong {
    font-weight: 600;
    color: var(--accent);
}

.hero-foot a {
    white-space: nowrap;
}

.hero-foot a i {
    margin-left: 0.3rem;
}

/* ---------- 02 · Servicios ---------- */

.pillars {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: clamp(1.5rem, 3vw, 3rem);
}

.pillar {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    padding-top: 1.25rem;
    border-top: var(--line);
}

.pillar-num {
    font-family: var(--f-acento);
    font-style: italic;
    font-size: 3.5rem;
    line-height: 0.9;
    color: var(--accent);
}

.pillar h3 {
    font-family: var(--f-titular);
    font-weight: 900;
    font-size: clamp(1.4rem, 2.2vw, 1.75rem);
    text-transform: uppercase;
    letter-spacing: -0.03em;
    line-height: 0.95;
    text-wrap: balance;
}

.chips {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-top: auto;
    padding-top: 0.5rem;
}

.chips li {
    padding: 0.35rem 0.8rem;
    border: var(--line);
    border-radius: 999px;
    font-size: 0.6875rem;
    font-weight: 600;
    letter-spacing: 0.07em;
    text-transform: uppercase;
}

/* ---------- 03 · Experiencia ---------- */

.xp-layout {
    display: grid;
    grid-template-columns: minmax(0, 1.3fr) minmax(0, 0.9fr);
    align-items: start;
    gap: clamp(2.5rem, 6vw, 6rem);
}

.xp-item {
    position: relative;
    display: grid;
    grid-template-columns: 9rem minmax(0, 1fr);
    gap: 1.5rem;
    padding: 1.75rem 0;
    border-top: var(--line);
}

.xp-item:last-child {
    border-bottom: var(--line);
}

.xp-meta {
    display: flex;
    flex-direction: column;
    gap: 0.4rem;
}

.xp-years {
    font-family: var(--f-acento);
    font-style: italic;
    font-size: 2.75rem;
    line-height: 0.95;
    color: var(--accent);
}

.xp-item h3 {
    font-family: var(--f-titular);
    font-weight: 800;
    font-size: clamp(1.25rem, 1.9vw, 1.5rem);
    letter-spacing: -0.02em;
    line-height: 1.1;
    margin-bottom: 0.75rem;
}

.hand-note--xp {
    margin-top: 0.4rem;
    font-size: 1.45rem;
    white-space: normal;
}

.hand-note--xp .hand-arrow {
    width: 2.2rem;
    margin: 0 0 0.2rem 1.5rem;
}

/* Bloque de código: oscuro, mono */
.code-window {
    position: relative;
    background: var(--night-bg);
    color: var(--night-fg);
    border-radius: var(--radius);
    box-shadow: var(--shadow-long);
    transform: rotate(2deg);
    margin-top: 1rem;
}

.window-bar {
    display: flex;
    align-items: center;
    gap: 0.4rem;
    padding: 0.75rem 1rem;
    border-bottom: 1px solid rgba(236, 235, 229, 0.14);
}

.window-bar .dot {
    width: 0.6rem;
    height: 0.6rem;
    border-radius: 50%;
    border: 1.5px solid currentColor;
    opacity: 0.55;
    flex-shrink: 0;
}

.window-title {
    margin-left: 0.6rem;
    font-family: var(--f-mono);
    font-size: 0.75rem;
    opacity: 0.6;
}

.code-window pre {
    padding: 1.4rem 1.4rem 1.2rem;
    white-space: pre-wrap;
    overflow-wrap: anywhere;
    font-family: var(--f-mono);
    font-size: clamp(0.8rem, 1.1vw, 0.92rem);
    line-height: 1.75;
}

.code-window code {
    font-family: inherit;
}

.code-window .c { color: #9C9A92; font-style: italic; }
.code-window .k { color: var(--night-accent); }
.code-window .s { color: #B9C6FF; }

.code-window figcaption {
    padding: 0 1.4rem 1.1rem;
    color: #9C9A92;
    font-size: 0.6875rem;
}

/* ---------- 04 · Proyectos ---------- */

.hand-note--projects {
    position: absolute;
    right: 8%;
    bottom: -3.25rem;
    display: flex;
    align-items: flex-end;
    gap: 0.25rem;
}

.hand-note--projects .hand-arrow {
    transform: translateY(1.5rem);
}

.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(min(100%, 19rem), 1fr));
    gap: clamp(2rem, 3vw, 2.75rem);
}

.project-card {
    display: flex;
    flex-direction: column;
    gap: 0.9rem;
}

/* Ventana de navegador para capturas */
.browser {
    border: var(--line);
    border-radius: var(--radius);
    background: var(--surface);
    overflow: hidden;
    box-shadow: var(--shadow-long);
    margin-bottom: 0.6rem;
    transition: transform 0.35s ease;
}

.project-card:hover .browser {
    transform: rotate(-1.5deg) translateY(-6px);
}

.browser .window-bar {
    background: var(--surface-2);
    border-bottom: var(--line);
    color: var(--fg);
    padding: 0.6rem 0.8rem;
}

.browser-url {
    flex: 1;
    min-width: 0;
    margin-left: 0.5rem;
    padding: 0.3rem 0.8rem;
    border-radius: 999px;
    background: var(--bg);
    font-size: 0.75rem;
    font-weight: 500;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.project-slider {
    position: relative;
    width: 100%;
    aspect-ratio: 16 / 10;
    overflow: hidden;
}

.slider-track {
    display: flex;
    height: 100%;
    transition: transform 0.5s ease-in-out;
}

.slider-track img {
    flex: 0 0 100%;
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: top;
}

.slider-dots {
    position: absolute;
    bottom: 0.7rem;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    align-items: center;
    gap: 0.35rem;
    padding: 0.35rem 0.5rem;
    border-radius: 999px;
    background: var(--topbar-bg);
    z-index: 2;
}

.slider-dot {
    width: 7px;
    height: 7px;
    padding: 0;
    border: none;
    border-radius: 50%;
    background-color: var(--fg-30);
    cursor: pointer;
    transition: 0.2s ease;
}

.slider-dot.active {
    width: 18px;
    border-radius: 4px;
    background: var(--fill);
}

.project-tags {
    color: var(--muted);
}

.project-card h3 {
    font-family: var(--f-titular);
    font-weight: 900;
    font-size: clamp(1.6rem, 2.4vw, 2rem);
    text-transform: uppercase;
    letter-spacing: -0.035em;
    line-height: 0.95;
}

.project-card > p:not(.label) {
    font-size: 1rem;
}

.project-card .btn-group {
    margin-top: auto;
    padding-top: 0.5rem;
}

/* ---------- 05 · Habilidades (slide noche) ---------- */

.section--night {
    background: var(--night-bg);
    color: var(--night-fg);
}

.section--night .section-bar {
    border-top-color: rgba(236, 235, 229, 0.35);
}

.section--night .headline .accent {
    color: var(--night-accent);
}

.skills-list {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(min(100%, 15rem), 1fr));
    column-gap: clamp(1.5rem, 3vw, 3rem);
}

.skill {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1.15rem 0;
    border-top: 1px solid rgba(236, 235, 229, 0.2);
    font-size: 1.125rem;
    font-weight: 600;
}

.skill-num {
    font-family: var(--f-acento);
    font-style: italic;
    font-weight: 400;
    font-size: 1.9rem;
    line-height: 1;
    color: var(--night-accent);
    min-width: 2.2rem;
}

.skill i {
    width: 1.6rem;
    font-size: 1.35rem;
    text-align: center;
    transition: color 0.2s ease, transform 0.2s ease;
}

.skill:hover i {
    color: var(--night-accent);
    transform: translateY(-2px);
}

/* ---------- 06 · Reseñas (burbujas de chat) ---------- */

.reviews-grid {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: clamp(1.5rem, 2.5vw, 2rem);
    align-items: start;
}

.review {
    display: flex;
    flex-direction: column;
    gap: 1.1rem;
}

.bubble {
    position: relative;
    background: var(--surface);
    border-radius: 22px 22px 22px 6px;
    padding: 1.4rem 1.4rem 1.5rem;
    box-shadow: 0 18px 36px -24px rgba(20, 20, 19, 0.45);
    transition: transform 0.3s ease;
}

.review:hover .bubble {
    transform: translateY(-4px) rotate(-1deg);
}

.bubble p {
    font-size: 0.98rem;
    line-height: 1.5;
}

.review-stars {
    display: flex;
    gap: 0.2rem;
    margin-bottom: 0.75rem;
    color: var(--accent);
    font-size: 0.8rem;
}

.review-author {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding-left: 0.25rem;
}

.review-avatar {
    width: 2.9rem;
    height: 2.9rem;
    border-radius: 50%;
    object-fit: cover;
    object-position: top;
    border: var(--line);
    background: var(--surface);
    flex-shrink: 0;
}

.review-author strong {
    display: block;
    font-family: var(--f-titular);
    font-weight: 800;
    font-size: 1rem;
    letter-spacing: -0.01em;
    line-height: 1.2;
}

.review-author strong + span {
    display: block;
    font-size: 0.875rem;
    color: var(--muted);
}

/* ---------- 07 · Cierre en cobalto ---------- */

.section--cobalt {
    background: var(--fill);
    color: var(--on-fill);
}

.section--cobalt .section-bar {
    border-top-color: rgba(255, 255, 255, 0.55);
}

/* Sobre cobalto, todo en blanco */
.section--cobalt .headline .accent {
    color: var(--on-fill);
}

.section--cobalt ::selection {
    background: var(--on-fill);
    color: var(--fill);
}

.section--cobalt :focus-visible {
    outline-color: var(--on-fill);
}

.contact-grid {
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    gap: clamp(2.5rem, 6vw, 6rem);
    align-items: start;
}

.contact-copy {
    display: flex;
    flex-direction: column;
    gap: 1.75rem;
}

.contact-form {
    display: flex;
    flex-direction: column;
    align-items: stretch;
    gap: 1.25rem;
}

.field {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.input {
    position: relative;
}

.input i {
    position: absolute;
    top: 50%;
    left: 1.1rem;
    transform: translateY(-50%);
    color: var(--muted);
    pointer-events: none;
}

.contact-form .input-field,
.contact-form textarea {
    width: 100%;
    border: 2px solid transparent;
    border-radius: 14px;
    background: var(--surface);
    color: var(--fg);
    font-size: 1.0625rem;
    outline: none;
    transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.contact-form .input-field {
    padding: 1rem 1.2rem 1rem 2.9rem;
}

.contact-form textarea {
    padding: 1rem 1.2rem;
    resize: vertical;
    min-height: 9rem;
}

.contact-form .input-field::placeholder,
.contact-form textarea::placeholder {
    color: var(--muted);
}

.contact-form .input-field:focus,
.contact-form textarea:focus {
    border-color: var(--fg);
    box-shadow: 0 0 0 4px rgba(20, 20, 19, 0.25);
}

.contact-form .input-field:focus + i,
.input:focus-within i {
    color: var(--fg);
}

.contact-form .btn {
    align-self: flex-start;
    border-color: var(--fg);
}

.contact-form .btn-ink:hover {
    background: var(--on-fill);
    border-color: var(--on-fill);
    color: var(--tinta);
}

.form-status {
    min-height: 1.5rem;
    font-weight: 500;
}

/* ---------- Pie con firma ---------- */

.footer {
    padding: 3.5rem 0 2rem;
}

.footer-inner {
    display: flex;
    justify-content: space-between;
    align-items: flex-end;
    flex-wrap: wrap;
    gap: 2rem;
    padding-bottom: 2rem;
}

.footer-links {
    display: flex;
    flex-wrap: wrap;
    gap: 0.6rem 1.5rem;
}

.footer-links a {
    font-size: 0.9375rem;
    font-weight: 500;
}

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

/* Firma principal: Instrument Serif itálica, "developer" en cobalto */
.signature {
    font-family: var(--f-acento);
    font-style: italic;
    font-size: clamp(2.2rem, 4.5vw, 3.4rem);
    line-height: 1;
    letter-spacing: -0.01em;
    text-transform: lowercase;
    margin-left: auto;
}

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

.copyright {
    padding-top: 1rem;
    border-top: var(--line);
    color: var(--muted);
    font-size: 0.6875rem;
}

/* ---------- Animaciones de aparición ---------- */

.reveal {
    opacity: 0;
    transform: translateY(32px);
    transition: opacity 0.7s ease, transform 0.7s ease;
}

.reveal.active {
    opacity: 1;
    transform: none;
}

.stagger > .reveal:nth-child(2) { transition-delay: 0.1s; }
.stagger > .reveal:nth-child(3) { transition-delay: 0.2s; }
.stagger > .reveal:nth-child(4) { transition-delay: 0.3s; }
.stagger > .reveal:nth-child(5) { transition-delay: 0.4s; }
.stagger > .reveal:nth-child(6) { transition-delay: 0.5s; }
.stagger > .reveal:nth-child(7) { transition-delay: 0.6s; }

@media (prefers-reduced-motion: reduce) {
    html {
        scroll-behavior: auto;
    }

    .reveal {
        transition: none;
        opacity: 1;
        transform: none;
    }

    .egg-wiggle {
        animation: none;
    }
}

/* ---------- Responsive ---------- */

@media (max-width: 1180px) {
    .topbar-inner {
        gap: 1.25rem;
    }

    .nav-links {
        gap: 1.1rem;
    }

    .nav-links a {
        font-size: 0.875rem;
    }

    .reviews-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
}

@media (max-width: 1000px) {
    .menu-toggle {
        display: grid;
        place-items: center;
    }

    .topbar nav {
        margin-left: auto;
    }

    .nav-links {
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        display: none;
        flex-direction: column;
        gap: 0;
        padding: 0.5rem var(--gutter) 1rem;
        background: var(--bg);
        border-bottom: var(--line);
    }

    .nav-links.active {
        display: flex;
    }

    .nav-links li {
        border-top: 1px solid var(--soft-line);
    }

    .nav-links a {
        display: block;
        padding: 0.9rem 0;
        font-size: 1rem;
    }

    .nav-links a::after {
        display: none;
    }

    .topbar.menu-open {
        background: var(--bg);
        border-bottom-color: var(--fg);
    }
}

@media (max-width: 900px) {
    .hero {
        min-height: auto;
    }

    .hero-grid,
    .xp-layout,
    .contact-grid {
        grid-template-columns: minmax(0, 1fr);
    }

    .headline--hero {
        font-size: clamp(1.75rem, 8vw, 4rem);
    }

    .hero-visual {
        order: -1;
        width: min(72%, 18rem);
        margin: 1rem auto 1.5rem;
    }

    .hand-note--hero {
        left: auto;
        right: -2.5rem;
        top: -2.25rem;
    }

    .hand-note--hero .hand-arrow {
        margin-left: 0;
        transform: rotate(-30deg);
    }

    .pillars {
        grid-template-columns: minmax(0, 1fr);
    }

    .pillar {
        display: grid;
        grid-template-columns: 4.5rem minmax(0, 1fr);
        column-gap: 1rem;
    }

    .pillar > *:not(.pillar-num) {
        grid-column: 2;
    }

    .pillar-num {
        grid-row: 1 / span 3;
    }

    .code-window {
        transform: rotate(-2deg);
        margin: 0 0.5rem;
    }

    .hand-note--projects {
        position: static;
        align-self: flex-end;
        margin-left: auto;
    }

    .hand-note--projects .hand-arrow {
        transform: rotate(10deg) translateY(0.75rem);
    }
}

@media (max-width: 600px) {
    body {
        font-size: 1rem;
    }

    .topbar-cta {
        display: none;
    }

    .hero-foot {
        flex-direction: column;
        align-items: flex-start;
        gap: 1rem;
    }

    .stamp {
        left: -0.75rem;
        font-size: 0.65rem;
    }

    .hand-note--hero {
        right: -1rem;
        top: -2.75rem;
        font-size: 1.4rem;
    }

    .xp-item {
        grid-template-columns: minmax(0, 1fr);
        gap: 1rem;
    }

    .xp-meta {
        flex-direction: row;
        flex-wrap: wrap;
        align-items: baseline;
        gap: 0.75rem;
    }

    .hand-note--xp {
        margin: 0 0 0 auto;
        font-size: 1.25rem;
    }

    .hand-note--xp .hand-arrow {
        display: none;
    }

    .pillar {
        grid-template-columns: 3.25rem minmax(0, 1fr);
    }

    .pillar-num {
        font-size: 2.75rem;
    }

    .btn-group .btn:not(.btn-sm) {
        flex: 1 1 auto;
    }

    .contact-form .btn {
        align-self: stretch;
    }

    .footer-inner {
        flex-direction: column;
        align-items: flex-start;
    }

    .signature {
        margin-left: 0;
    }

    .reviews-grid {
        grid-template-columns: minmax(0, 1fr);
    }
}

/* ==========================================================================
   Modo oscuro (toggle) y embudo a WhatsApp
   ========================================================================== */

.topbar-actions {
    display: flex;
    align-items: center;
    gap: 0.6rem;
}

.theme-toggle {
    display: grid;
    place-items: center;
    width: 2.75rem;
    height: 2.75rem;
    border: var(--line);
    border-radius: 50%;
    background: transparent;
    cursor: pointer;
    font-size: 1rem;
    transition: background-color 0.2s ease, color 0.2s ease;
}

.theme-toggle:hover {
    background: var(--fg);
    color: var(--bg);
}

.theme-toggle .fa-sun,
:root[data-theme="dark"] .theme-toggle .fa-moon {
    display: none;
}

:root[data-theme="dark"] .theme-toggle .fa-sun {
    display: inline-block;
}

.btn .fa-whatsapp {
    font-size: 1.25em;
}

/* Nota debajo de los botones */
.cta-note {
    margin-top: -0.75rem;
    font-size: 0.9375rem;
    font-weight: 500;
    color: var(--muted);
}

.cta-note i {
    color: var(--accent);
    margin-right: 0.3rem;
}

/* Link de consulta en cada pilar */
.pillar-cta {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    align-self: flex-start;
    font-size: 0.8125rem;
    font-weight: 600;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    color: var(--accent);
    border-bottom: 2px solid currentColor;
    padding-bottom: 0.15rem;
    transition: gap 0.2s ease;
}

.pillar-cta:hover {
    gap: 0.8rem;
}

/* Banda de llamado a la acción entre secciones */
.cta-band {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    gap: 1.5rem 2rem;
    margin-top: clamp(3rem, 6vw, 4.5rem);
    padding: clamp(1.5rem, 3vw, 2rem) clamp(1.5rem, 3vw, 2.25rem);
    border: var(--line);
    border-radius: var(--radius);
}

.cta-band p {
    font-family: var(--f-titular);
    font-weight: 900;
    text-transform: uppercase;
    letter-spacing: -0.03em;
    line-height: 0.95;
    font-size: clamp(1.5rem, 3vw, 2.2rem);
}

.cta-band p em {
    font-family: var(--f-acento);
    font-weight: 400;
    font-style: italic;
    text-transform: none;
    letter-spacing: 0;
    color: var(--accent);
    font-size: 1.2em;
}

.section--night .cta-band {
    border-color: rgba(236, 235, 229, 0.35);
}

.section--night .cta-band p em {
    color: var(--night-accent);
}

.section--night .btn-outline {
    color: var(--night-fg);
    border-color: var(--night-fg);
}

.section--night .btn-outline:hover {
    background: var(--night-fg);
    color: var(--night-bg);
}

/* Cierre: botón blanco sobre cobalto */
.btn-light {
    background: var(--blanco);
    border-color: var(--blanco);
    color: var(--tinta);
}

.btn-light:hover {
    background: var(--tinta);
    border-color: var(--tinta);
    color: var(--blanco);
}

.btn-lg {
    min-height: 3.75rem;
    padding: 0 2rem;
    font-size: 0.9375rem;
}

.contact-copy .contact-alt {
    font-size: 0.9375rem;
    font-weight: 500;
    opacity: 0.85;
}

.contact-copy .contact-alt a {
    border-bottom: 1px solid currentColor;
}

.form-title {
    font-family: var(--f-titular);
    font-weight: 800;
    font-size: 1.25rem;
    letter-spacing: -0.01em;
}

.form-hint {
    margin-top: -0.75rem;
    font-size: 0.9375rem;
    opacity: 0.85;
}

/* Botón flotante de WhatsApp */
.wa-float {
    position: fixed;
    right: clamp(1rem, 3vw, 2rem);
    bottom: clamp(1rem, 3vw, 2rem);
    z-index: 900;
    display: inline-flex;
    align-items: center;
    gap: 0.6rem;
    min-height: 3.5rem;
    padding: 0 1.4rem 0 1.15rem;
    border-radius: 999px;
    background: var(--fill);
    color: var(--on-fill);
    font-size: 0.875rem;
    font-weight: 600;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    box-shadow: 0 16px 32px -12px rgba(20, 20, 19, 0.55);
    opacity: 0;
    visibility: hidden;
    transform: translateY(1rem) scale(0.95);
    transition: opacity 0.3s ease, transform 0.3s ease, visibility 0.3s, background-color 0.2s ease;
}

.wa-float i {
    font-size: 1.5rem;
}

.wa-float.visible {
    opacity: 1;
    visibility: visible;
    transform: none;
}

.wa-float:hover {
    background: var(--fg);
    color: var(--bg);
}

@media (max-width: 1000px) {
    .topbar-actions {
        margin-left: 0;
    }
}

@media (max-width: 600px) {
    .topbar-cta {
        display: inline-flex;
        width: 2.75rem;
        min-height: 2.75rem;
        padding: 0;
    }

    .topbar-cta span {
        display: none;
    }

    .topbar-cta .fa-whatsapp {
        font-size: 1.35rem;
    }

    .handle {
        font-size: 0.75rem;
    }

    .topbar-inner {
        gap: 0.75rem;
    }

    .wa-float {
        padding: 0;
        width: 3.5rem;
        justify-content: center;
    }

    .wa-float span {
        display: none;
    }

    .cta-band .btn,
    .btn-lg {
        flex: 1 1 100%;
        padding: 0 1.25rem;
        white-space: normal;
        text-align: center;
    }
}

@media (prefers-reduced-motion: reduce) {
    .wa-float {
        transition: opacity 0.2s ease, visibility 0.2s;
    }
}