:root {
    --black: #07090d;
    --panel: #0d1118;
    --white: #f4f7fb;
    --gray: #a0a8b5;
    --line: rgba(255,255,255,.12);
    --blue: #1778ff;
    --cyan: #00d7ff;
    --orange: #ff7139;
    --green: #00d38a;
}

* {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    margin: 0;
    background: var(--black);
    color: var(--white);
    font-family: Arial, Helvetica, sans-serif;
    overflow-x: hidden;
}

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

.delta-header {
    position: fixed;
    z-index: 1000;
    top: 0;
    left: 0;
    width: 100%;
    height: 92px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 5vw;
    border-bottom: 1px solid rgba(255,255,255,.08);
    background: rgba(7,9,13,.72);
    backdrop-filter: blur(18px);
}

.delta-brand {
    display: flex;
    align-items: center;
    gap: 12px;
}

.delta-brand-mark {
    font-size: 30px;
    color: var(--cyan);
}

.delta-brand strong,
.delta-brand small {
    display: block;
}

.delta-brand strong {
    letter-spacing: .18em;
}

.delta-brand small {
    margin-top: 2px;
    color: var(--gray);
    font-size: 9px;
    letter-spacing: .35em;
}

.delta-nav {
    display: flex;
    align-items: center;
    gap: 30px;
    font-size: 13px;
}

.delta-nav a {
    color: #d4d8df;
}

.delta-nav-contact {
    padding: 12px 19px;
    border: 1px solid rgba(255,255,255,.25);
    border-radius: 100px;
}

.delta-menu-toggle {
    display: none;
}

.delta-hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding: 150px 8vw 80px;
    overflow: hidden;
    background:
        radial-gradient(circle at 75% 40%, rgba(23,120,255,.20), transparent 30%),
        radial-gradient(circle at 85% 70%, rgba(0,215,255,.10), transparent 23%),
        var(--black);
}

.delta-grid {
    position: absolute;
    inset: 0;
    opacity: .15;
    background-image:
        linear-gradient(rgba(255,255,255,.08) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255,255,255,.08) 1px, transparent 1px);
    background-size: 70px 70px;
    mask-image: linear-gradient(to right, transparent 5%, black, transparent);
}

.delta-orbit {
    position: absolute;
    border: 1px solid rgba(0,215,255,.25);
    border-radius: 50%;
}

.orbit-a {
    width: 700px;
    height: 700px;
    right: -230px;
    top: 15%;
}

.orbit-b {
    width: 440px;
    height: 440px;
    right: -40px;
    top: 32%;
}

.delta-hero-content {
    position: relative;
    z-index: 2;
    max-width: 1050px;
}

.delta-eyebrow,
.delta-kicker {
    color: var(--cyan);
    font-size: 12px;
    font-weight: 700;
    letter-spacing: .28em;
}

.delta-hero h1 {
    margin: 25px 0;
    font-size: clamp(4.5rem, 11vw, 11rem);
    line-height: .79;
    letter-spacing: -.07em;
    font-weight: 800;
}

.delta-hero h1 span {
    color: transparent;
    -webkit-text-stroke: 1px rgba(255,255,255,.55);
}

.delta-hero-sub {
    max-width: 620px;
    color: #bac1cb;
    font-size: clamp(1.05rem, 2vw, 1.4rem);
    line-height: 1.5;
}

.delta-hero-actions {
    display: flex;
    gap: 14px;
    margin-top: 42px;
}

.delta-button {
    display: inline-flex;
    padding: 17px 25px;
    border: 1px solid rgba(255,255,255,.2);
    border-radius: 100px;
    font-size: 13px;
    transition: .25s ease;
}

.delta-button:hover {
    transform: translateY(-3px);
}

.delta-button-primary {
    color: #00131b;
    background: var(--cyan);
    border-color: var(--cyan);
    font-weight: 700;
}

.delta-scroll {
    position: absolute;
    right: 5vw;
    bottom: 50px;
    display: flex;
    align-items: center;
    gap: 15px;
    transform: rotate(90deg);
    transform-origin: right bottom;
    color: var(--gray);
    font-size: 9px;
    letter-spacing: .25em;
}

.delta-scroll i {
    display: block;
    width: 70px;
    height: 1px;
    background: var(--cyan);
}

.delta-stats {
    display: grid;
    grid-template-columns: repeat(4,1fr);
    border-top: 1px solid var(--line);
    border-bottom: 1px solid var(--line);
}

.delta-stat {
    padding: 60px 4vw;
    border-right: 1px solid var(--line);
}

.delta-stat:last-child {
    border-right: 0;
}

.delta-stat strong {
    font-size: clamp(3.5rem,6vw,6rem);
    letter-spacing: -.06em;
}

.delta-stat > span {
    color: var(--cyan);
    font-size: 1.4rem;
}

.delta-stat p {
    margin: 12px 0 0;
    color: var(--gray);
}

.delta-section {
    padding: 130px 8vw;
}

.delta-intro-grid {
    display: grid;
    grid-template-columns: 1.2fr .8fr;
    gap: 10vw;
    align-items: end;
}

.delta-intro h2,
.delta-section-heading h2,
.delta-tech h2 {
    margin: 20px 0 0;
    font-size: clamp(3rem,7vw,7rem);
    line-height: .95;
    letter-spacing: -.06em;
}

.delta-intro h2 em,
.delta-tech h2 em {
    color: var(--cyan);
    font-style: normal;
}

.delta-intro-text {
    color: #bbc2cc;
    font-size: 18px;
    line-height: 1.8;
}

.delta-section-heading {
    margin-bottom: 75px;
}

.delta-services {
    display: grid;
    grid-template-columns: repeat(3,1fr);
    border-top: 1px solid var(--line);
}

.delta-service {
    min-height: 320px;
    padding: 45px 35px;
    border-right: 1px solid var(--line);
    border-bottom: 1px solid var(--line);
    transition: .3s ease;
}

.delta-service:hover {
    background: #101722;
    transform: translateY(-6px);
}

.delta-service span {
    color: var(--cyan);
    font-size: 11px;
}

.delta-service h3 {
    margin: 70px 0 15px;
    font-size: 30px;
}

.delta-service p {
    color: var(--gray);
    line-height: 1.6;
}

.delta-projects {
    padding: 130px 8vw;
}

.delta-project {
    position: relative;
    min-height: 480px;
    margin-bottom: 28px;
    padding: 60px;
    display: grid;
    grid-template-columns: 70px 1fr auto;
    gap: 50px;
    align-items: end;
    overflow: hidden;
    border-radius: 28px;
}

.delta-project::before {
    content: "";
    position: absolute;
    width: 650px;
    height: 650px;
    border: 1px solid rgba(255,255,255,.15);
    border-radius: 50%;
    right: -170px;
    top: -220px;
}

.delta-project-blue {
    background: linear-gradient(135deg,#072e77,#0d73d8);
}

.delta-project-orange {
    background: linear-gradient(135deg,#6b1e08,#ef5d24);
}

.delta-project-green {
    background: linear-gradient(135deg,#053e31,#00976e);
}

.delta-project-number {
    align-self: start;
    font-size: 12px;
}

.delta-project h3 {
    margin: 10px 0;
    font-size: clamp(3rem,7vw,7rem);
    letter-spacing: -.06em;
}

.delta-project-description {
    max-width: 600px;
    line-height: 1.6;
}

.delta-project > strong {
    position: relative;
    z-index: 2;
    font-size: clamp(4rem,8vw,8rem);
    line-height: .7;
    text-align: right;
}

.delta-project > strong small {
    font-size: 14px;
    letter-spacing: .15em;
}

.delta-tech {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 6vw;
    align-items: center;
}

.delta-tech-copy > p:last-child {
    max-width: 600px;
    margin-top: 40px;
    color: var(--gray);
    font-size: 18px;
    line-height: 1.7;
}

.delta-tech-visual {
    min-height: 620px;
    display: grid;
    place-items: center;
}

.delta-radar {
    position: relative;
    width: min(460px,80vw);
    aspect-ratio: 1;
    border: 1px solid rgba(0,215,255,.35);
    border-radius: 50%;
}

.delta-radar span {
    position: absolute;
    border: 1px solid rgba(0,215,255,.22);
    border-radius: 50%;
    inset: 12%;
}

.delta-radar span:nth-child(2) {
    inset: 28%;
}

.delta-radar span:nth-child(3) {
    inset: 44%;
}

.delta-radar i {
    position: absolute;
    left: 50%;
    top: 50%;
    width: 48%;
    height: 1px;
    background: linear-gradient(90deg,var(--cyan),transparent);
    transform-origin: left center;
    animation: radar 5s linear infinite;
}

@keyframes radar {
    to { transform: rotate(360deg); }
}

.delta-contact {
    padding: 150px 8vw;
    background:
        radial-gradient(circle at 90% 50%,rgba(0,215,255,.15),transparent 25%),
        #0b1017;
}

.delta-contact h2 {
    margin: 25px 0 70px;
    max-width: 1200px;
    font-size: clamp(3rem,7vw,7rem);
    letter-spacing: -.06em;
    line-height: .95;
}

.delta-contact-link {
    display: flex;
    justify-content: space-between;
    padding: 25px 0;
    border-bottom: 1px solid rgba(255,255,255,.25);
    font-size: clamp(1.2rem,3vw,2.5rem);
}

.delta-contact-link span {
    color: var(--cyan);
}

.delta-footer {
    padding: 35px 8vw;
    display: flex;
    justify-content: space-between;
    gap: 30px;
    border-top: 1px solid var(--line);
    color: var(--gray);
    font-size: 11px;
    letter-spacing: .12em;
}

.reveal {
    opacity: 0;
    transform: translateY(45px);
    transition:
        opacity .8s ease,
        transform .8s cubic-bezier(.2,.7,.2,1);
}

.reveal.delta-visible {
    opacity: 1;
    transform: translateY(0);
}

@media (max-width: 900px) {

    .delta-header {
        height: 75px;
    }

    .delta-nav {
        position: fixed;
        inset: 75px 0 auto 0;
        padding: 35px 6vw;
        display: none;
        flex-direction: column;
        align-items: flex-start;
        background: #090d13;
    }

    .delta-nav.delta-open {
        display: flex;
    }

    .delta-menu-toggle {
        display: block;
        width: 35px;
        border: 0;
        background: transparent;
    }

    .delta-menu-toggle span {
        display: block;
        height: 1px;
        background: white;
        margin: 8px 0;
    }

    .delta-hero {
        padding: 130px 6vw 70px;
    }

    .delta-scroll {
        display: none;
    }

    .delta-stats {
        grid-template-columns: 1fr 1fr;
    }

    .delta-stat:nth-child(2) {
        border-right: 0;
    }

    .delta-intro-grid,
    .delta-tech {
        grid-template-columns: 1fr;
    }

    .delta-services {
        grid-template-columns: 1fr;
    }

    .delta-service {
        min-height: auto;
        border-right: 0;
    }

    .delta-service h3 {
        margin-top: 35px;
    }

    .delta-project {
        min-height: 520px;
        padding: 35px;
        grid-template-columns: 1fr;
        gap: 20px;
        align-content: end;
    }

    .delta-project > strong {
        text-align: left;
    }

    .delta-footer {
        flex-direction: column;
    }
}

@media (max-width: 520px) {

    .delta-hero h1 {
        font-size: 4rem;
    }

    .delta-hero-actions {
        flex-direction: column;
    }

    .delta-button {
        justify-content: center;
    }

    .delta-stats {
        grid-template-columns: 1fr;
    }

    .delta-stat {
        border-right: 0;
    }

    .delta-section,
    .delta-projects,
    .delta-contact {
        padding-left: 6vw;
        padding-right: 6vw;
    }
}


/* =========================================================
   DELTA · WHATSAPP FLOTANTE
   ========================================================= */

.delta-wa-float {
    position: fixed;

    right: 24px;
    bottom: calc(24px + env(safe-area-inset-bottom));

    width: 54px;
    height: 54px;

    display: flex;
    align-items: center;
    justify-content: flex-end;

    overflow: hidden;

    background: rgba(14,14,14,.94);
    color: #fff;

    border:
        1px solid rgba(255,255,255,.18);

    border-radius: 999px;

    box-shadow:
        0 12px 35px rgba(0,0,0,.28);

    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);

    z-index: 9998;

    text-decoration: none;

    transition:
        width .32s cubic-bezier(.2,.7,.2,1),
        background .25s ease,
        border-color .25s ease,
        transform .25s ease;
}


.delta-wa-float:hover {
    width: 220px;

    background: rgba(18,18,18,.98);

    border-color:
        rgba(255,255,255,.35);

    transform: translateY(-2px);
}


.delta-wa-icon {
    flex: 0 0 54px;

    width: 54px;
    height: 54px;

    display: flex;
    align-items: center;
    justify-content: center;
}


.delta-wa-icon svg {
    width: 22px;
    height: 22px;

    display: block;
}


.delta-wa-label {
    white-space: nowrap;

    opacity: 0;
    transform: translateX(10px);

    padding-left: 18px;

    font-size: 8px;
    font-weight: 700;

    letter-spacing: .15em;

    transition:
        opacity .2s ease .04s,
        transform .25s ease .04s;
}


.delta-wa-float:hover
.delta-wa-label {
    opacity: 1;
    transform: translateX(0);
}


.delta-wa-float:focus-visible {
    outline:
        2px solid rgba(255,255,255,.85);

    outline-offset: 4px;
}


@media(max-width:700px) {

    .delta-wa-float {
        right: 16px;
        bottom:
            calc(18px + env(safe-area-inset-bottom));

        width: 50px;
        height: 50px;
    }


    .delta-wa-icon {
        flex-basis: 50px;

        width: 50px;
        height: 50px;
    }


    .delta-wa-icon svg {
        width: 21px;
        height: 21px;
    }


    .delta-wa-float:hover {
        width: 50px;

        transform: none;
    }


    .delta-wa-label {
        display: none;
    }

}


/* Delta · enlace SEO interno */
.delta-service-link {
    display: inline-block;
    margin-top: 18px;
    padding-bottom: 4px;

    border-bottom: 1px solid currentColor;

    color: inherit;
    text-decoration: none;

    font-size: 8px;
    font-weight: 700;
    letter-spacing: .14em;

    opacity: .62;

    transition:
        opacity .2s ease,
        transform .2s ease;
}

.delta-service-link:hover {
    opacity: 1;
    transform: translateX(2px);
}