/* ========================================
   1. VARIABLES Y CONFIGURACIÓN GENERAL
======================================== */

:root {
    --navy: #101e30;
    --navy-light: #1b2d42;
    --gold: #d6b778;
    --white: #ffffff;
    --background: #f5f6f7;
    --text: #253243;
    --muted: #687584;
    --border: #dfe4e9;
    --container: 1180px;
}

* {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    scroll-padding-top: 95px;
}

body {
    margin: 0;
    font-family: Arial, Helvetica, sans-serif;
    color: var(--text);
    background: var(--background);
    line-height: 1.6;
}

a {
    color: inherit;
}

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

button,
a {
    -webkit-tap-highlight-color: transparent;
}

button:focus-visible,
a:focus-visible,
input:focus-visible,
select:focus-visible,
textarea:focus-visible {
    outline: 3px solid var(--gold);
    outline-offset: 4px;
}

::selection {
    background: var(--gold);
    color: var(--navy);
}


/* ========================================
   2. ENCABEZADO Y NAVEGACIÓN
======================================== */

.header {
    position: sticky;
    top: 0;
    z-index: 100;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 24px;
    padding: 16px max(5%, calc((100% - var(--container)) / 2));
    background: rgba(255, 255, 255, 0.97);
    border-bottom: 1px solid var(--border);
    backdrop-filter: blur(12px);
}

.brand {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    text-decoration: none;
    flex-shrink: 0;
}

.brand-icon {
    display: grid;
    place-items: center;
    width: 44px;
    height: 44px;
    background: var(--navy);
    border-radius: 4px;
}

.brand-icon svg {
    width: 32px;
    fill: none;
    stroke: var(--gold);
    stroke-width: 2;
    stroke-linecap: square;
    stroke-linejoin: miter;
}

.brand-text {
    display: flex;
    flex-direction: column;
    line-height: 1.2;
}

.brand-text strong {
    font-size: 21px;
    letter-spacing: 2px;
    color: var(--navy);
}

.brand-text small {
    margin-top: 4px;
    font-size: 9px;
    letter-spacing: 1px;
    color: var(--muted);
}

.nav {
    display: flex;
    align-items: center;
    gap: 30px;
}

.nav a {
    font-size: 13px;
    font-weight: 600;
    text-decoration: none;
    transition: color 0.2s ease;
}

.nav a:hover {
    color: #a27d38;
}

.nav .nav-cta {
    padding: 11px 17px;
    color: var(--white);
    background: var(--navy);
    border-radius: 4px;
}

.nav .nav-cta:hover {
    color: var(--gold);
}

.menu-toggle {
    display: none;
    border: 1px solid var(--border);
    background: var(--white);
    border-radius: 4px;
    padding: 9px;
    cursor: pointer;
}

.menu-toggle span {
    display: block;
    width: 22px;
    height: 2px;
    margin: 4px 0;
    background: var(--navy);
}


/* ========================================
   3. PORTADA PRINCIPAL
======================================== */

.hero {
    position: relative;
    display: grid;
    grid-template-columns: 1.05fr 0.95fr;
    align-items: center;
    gap: 50px;
    max-width: var(--container);
    min-height: 600px;
    margin: 0 auto;
    padding: 85px 36px 100px;
}

.hero-content {
    position: relative;
    z-index: 2;
}

.eyebrow {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 11px;
    font-weight: 700;
    letter-spacing: 1.6px;
}

.status-dot {
    width: 8px;
    height: 8px;
    background: #a88a4b;
    border-radius: 50%;
}

.hero h1 {
    margin: 25px 0 22px;
    max-width: 660px;
    color: var(--navy);
    font-size: clamp(38px, 4.5vw, 60px);
    line-height: 1.1;
    letter-spacing: -2.2px;
    font-weight: 700;
}

.hero h1 span {
    color: #9b793b;
}

.hero-description {
    max-width: 510px;
    margin: 0;
    color: var(--muted);
    font-size: 16px;
    line-height: 1.9;
}

.hero-actions {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 12px;
    margin-top: 32px;
}

.button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 18px;
    min-height: 48px;
    padding: 13px 19px;
    border: 1px solid transparent;
    border-radius: 4px;
    font-size: 13px;
    font-weight: 700;
    text-decoration: none;
    cursor: pointer;
    transition:
        background 0.2s ease,
        color 0.2s ease,
        border-color 0.2s ease,
        transform 0.2s ease;
}

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

.button-primary {
    background: var(--navy);
    color: var(--white);
}

.button-primary:hover {
    background: #243d59;
}

.button-secondary {
    background: transparent;
    color: var(--navy);
    border-color: #cdd4dc;
}

.button-secondary:hover {
    border-color: var(--navy);
}

.hero-note {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-top: 48px;
    color: var(--muted);
    font-size: 9px;
    letter-spacing: 1.2px;
    font-weight: 700;
}

.note-line {
    width: 30px;
    height: 1px;
    background: var(--gold);
}

.hero-index {
    position: absolute;
    left: 36px;
    bottom: 24px;
    color: #87919c;
    font-size: 10px;
    letter-spacing: 1.3px;
}


/* ========================================
   4. ILUSTRACIÓN TÉCNICA
======================================== */

.hero-visual {
    position: relative;
    min-width: 0;
    overflow: hidden;
    padding: 18px;
    color: #d6b778;
    background: var(--navy);
    border-radius: 5px;
    box-shadow: 0 25px 55px rgba(16, 30, 48, 0.13);
}

.visual-top,
.visual-bottom {
    display: flex;
    justify-content: space-between;
    gap: 12px;
    color: #aab8c8;
    font-size: 9px;
    letter-spacing: 1px;
}

.technical-drawing {
    display: block;
    width: 100%;
    height: auto;
    margin: 12px 0;
}

.visual-bottom {
    padding-top: 15px;
    border-top: 1px solid #344458;
}

.visual-stamp {
    position: absolute;
    right: 25px;
    bottom: 60px;
    display: flex;
    flex-direction: column;
    padding: 9px 12px;
    color: var(--gold);
    background: var(--navy-light);
    border: 1px solid #45566a;
    font-size: 8px;
    letter-spacing: 1px;
}

.visual-stamp strong {
    font-size: 18px;
}


/* ========================================
   5. FRANJA DE ESPECIALIDADES
======================================== */

.trust-strip {
    display: flex;
    justify-content: center;
    align-items: center;
    flex-wrap: wrap;
    gap: 20px;
    padding: 22px 5%;
    color: #e9edf2;
    background: var(--navy);
    font-size: 10px;
    font-weight: 700;
    letter-spacing: 1.3px;
    text-align: center;
}

.strip-separator {
    color: var(--gold);
}


/* ========================================
   6. SECCIONES GENERALES
======================================== */

.section {
    max-width: var(--container);
    margin: 0 auto;
    padding: 105px 36px;
}

.section-heading {
    display: flex;
    justify-content: space-between;
    align-items: end;
    gap: 40px;
    margin-bottom: 48px;
}

.section-eyebrow {
    color: #9b793b;
}

.section-heading h2,
.about-content h2,
.contact-content h2 {
    margin: 18px 0 0;
    color: var(--navy);
    font-size: clamp(32px, 4vw, 46px);
    line-height: 1.15;
    letter-spacing: -1.4px;
}

.section-heading > p {
    max-width: 400px;
    margin: 0 0 4px;
    color: var(--muted);
    font-size: 14px;
    line-height: 1.9;
}


/* ========================================
   7. TARJETAS DE SERVICIOS
======================================== */

.services-grid {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 16px;
}

.service-card {
    position: relative;
    display: flex;
    flex-direction: column;
    min-height: 300px;
    padding: 25px 22px;
    background: var(--white);
    border: 1px solid var(--border);
    border-radius: 4px;
    transition:
        transform 0.2s ease,
        border-color 0.2s ease,
        box-shadow 0.2s ease;
}

.service-card:hover {
    transform: translateY(-5px);
    border-color: #c4ad7c;
    box-shadow: 0 15px 35px rgba(16, 30, 48, 0.06);
}

.service-number {
    color: #9b793b;
    font-size: 11px;
    letter-spacing: 1px;
    font-weight: 700;
}

.service-icon {
    display: grid;
    place-items: center;
    width: 46px;
    height: 46px;
    margin-top: 25px;
    color: var(--gold);
    background: var(--navy);
    border-radius: 4px;
    font-size: 25px;
}

.service-card h3 {
    margin: 22px 0 10px;
    color: var(--navy);
    font-size: 17px;
    line-height: 1.4;
}

.service-card p {
    margin: 0 0 24px;
    color: var(--muted);
    font-size: 12px;
    line-height: 1.8;
}

.text-link {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    margin-top: auto;
    color: var(--navy);
    font-size: 11px;
    font-weight: 700;
    text-decoration: none;
}

.text-link span {
    color: #9b793b;
    font-size: 15px;
}


/* ========================================
   8. FILOSOFÍA DE LA CONSULTORA
======================================== */

.about-section {
    position: relative;
    display: grid;
    grid-template-columns: 0.75fr 1.4fr 0.7fr;
    align-items: center;
    gap: 45px;
    overflow: hidden;
    padding: 80px max(5%, calc((100% - var(--container)) / 2));
    color: var(--white);
    background: var(--navy);
}

.about-mark {
    position: relative;
    display: flex;
    justify-content: center;
    align-items: center;
    width: 180px;
    height: 180px;
    border: 1px solid #46566a;
    transform: rotate(-8deg);
}

.about-mark::before,
.about-mark::after {
    position: absolute;
    content: "";
    background: #46566a;
}

.about-mark::before {
    width: 1px;
    height: 100%;
}

.about-mark::after {
    width: 100%;
    height: 1px;
}

.about-mark span {
    position: absolute;
    color: var(--gold);
    font-size: 48px;
    font-weight: 700;
}

.about-mark span:first-child {
    transform: translate(-18px, -8px);
}

.about-mark span:last-child {
    transform: translate(18px, 12px);
}

.about-content .eyebrow {
    color: var(--gold);
}

.about-content h2 {
    color: var(--white);
}

.about-content p {
    max-width: 550px;
    margin: 22px 0 28px;
    color: #c1cbd6;
    font-size: 14px;
    line-height: 1.9;
}

.button-light {
    color: var(--navy);
    background: var(--gold);
}

.button-light:hover {
    background: #e6cc95;
}

.about-side-note {
    display: flex;
    flex-direction: column;
    gap: 14px;
    padding-left: 25px;
    border-left: 1px solid #46566a;
}

.about-side-note span {
    margin-bottom: 8px;
    color: var(--gold);
    font-size: 10px;
    letter-spacing: 1.5px;
}

.about-side-note strong {
    color: #e5eaf0;
    font-size: 13px;
    font-weight: 500;
}


/* ========================================
   9. METODOLOGÍA
======================================== */

.capabilities-section {
    padding-top: 100px;
    padding-bottom: 110px;
}

.process-grid {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    border-top: 1px solid var(--border);
}

.process-item {
    padding: 25px 22px 0 0;
}

.process-item + .process-item {
    padding-left: 22px;
    border-left: 1px solid var(--border);
}

.process-item > span {
    color: #9b793b;
    font-size: 12px;
    font-weight: 700;
}

.process-item h3 {
    margin: 20px 0 8px;
    color: var(--navy);
    font-size: 18px;
}

.process-item p {
    margin: 0;
    color: var(--muted);
    font-size: 13px;
    line-height: 1.8;
}


/* ========================================
   10. CONTACTO
======================================== */

.contact-section {
    display: grid;
    grid-template-columns: 1fr 0.85fr;
    gap: 80px;
    padding: 90px max(5%, calc((100% - var(--container)) / 2));
    color: var(--white);
    background: var(--navy);
}

.contact-content .eyebrow {
    color: var(--gold);
}

.contact-content h2 {
    color: var(--white);
    font-size: clamp(36px, 4vw, 52px);
}

.contact-content > p {
    max-width: 430px;
    margin-top: 22px;
    color: #c1cbd6;
    font-size: 14px;
    line-height: 1.9;
}

.contact-form {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.contact-form label {
    margin-top: 8px;
    color: #e1e7ed;
    font-size: 12px;
    font-weight: 600;
}

.contact-form input,
.contact-form select,
.contact-form textarea {
    width: 100%;
    padding: 13px 14px;
    color: var(--white);
    background: #1b2d42;
    border: 1px solid #3c4e62;
    border-radius: 4px;
    font-size: 13px;
}

.contact-form input::placeholder,
.contact-form textarea::placeholder {
    color: #9eacbc;
}

.contact-form select {
    color-scheme: dark;
}

.contact-form textarea {
    resize: vertical;
}

.form-button {
    align-self: flex-start;
    margin-top: 12px;
    background: var(--gold);
    color: var(--navy);
}

.form-button:hover {
    background: #e6cc95;
}

.form-note {
    margin: 4px 0 0;
    color: #aab8c8;
    font-size: 11px;
    line-height: 1.7;
}


/* ========================================
   11. PIE DE PÁGINA
======================================== */

.footer {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 24px;
    padding: 28px max(5%, calc((100% - var(--container)) / 2));
    background: #0b1522;
}

.footer .brand-text strong {
    color: var(--white);
}

.footer .brand-text small {
    color: #aab8c8;
}

.footer-brand .brand-icon {
    border: 1px solid #45566a;
}

.footer > p {
    color: #aab8c8;
    font-size: 11px;
}

.back-to-top {
    color: var(--gold);
    font-size: 10px;
    letter-spacing: 1px;
    font-weight: 700;
    text-decoration: none;
}

.copyright {
    width: 100%;
    padding-top: 20px;
    border-top: 1px solid #29394b;
    color: #8291a2;
    font-size: 10px;
}


/* ========================================
   12. TABLETS
======================================== */

@media (max-width: 1000px) {
    .hero {
        gap: 28px;
        padding-right: 28px;
        padding-left: 28px;
    }

    .hero h1 {
        font-size: clamp(36px, 5vw, 48px);
    }

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

    .service-card {
        min-height: 280px;
    }

    .about-section {
        grid-template-columns: 0.5fr 1.5fr;
        gap: 35px;
    }

    .about-mark {
        width: 130px;
        height: 130px;
    }

    .about-side-note {
        grid-column: 2;
        flex-direction: row;
        flex-wrap: wrap;
        padding: 20px 0 0;
        border-left: none;
        border-top: 1px solid #46566a;
    }

    .about-side-note span {
        width: 100%;
    }

    .contact-section {
        gap: 40px;
    }

    .footer {
        column-gap: 18px;
    }
}


/* ========================================
   13. CELULARES
======================================== */

@media (max-width: 700px) {
    html {
        scroll-padding-top: 80px;
    }

    .header {
        padding: 12px 20px;
    }

    .brand-icon {
        width: 40px;
        height: 40px;
    }

    .brand-text strong {
        font-size: 18px;
    }

    .brand-text small {
        font-size: 8px;
    }

    .menu-toggle {
        display: block;
    }

    .nav {
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        display: none;
        flex-direction: column;
        align-items: stretch;
        gap: 0;
        padding: 10px 20px 20px;
        background: var(--white);
        border-bottom: 1px solid var(--border);
    }

    .nav.open {
        display: flex;
    }

    .nav a {
        padding: 13px 5px;
    }

    .nav .nav-cta {
        margin-top: 8px;
        padding: 12px 15px;
        text-align: center;
    }

    .hero {
        grid-template-columns: 1fr;
        gap: 35px;
        min-height: auto;
        padding: 65px 22px 80px;
    }

    .hero h1 {
        margin-top: 22px;
        font-size: clamp(38px, 10vw, 52px);
        letter-spacing: -1.7px;
    }

    .hero-description {
        font-size: 14px;
    }

    .hero-note {
        margin-top: 32px;
        font-size: 8px;
    }

    .hero-visual {
        padding: 12px;
    }

    .visual-top,
    .visual-bottom {
        font-size: 8px;
    }

    .hero-index {
        left: 22px;
        bottom: 20px;
    }

    .trust-strip {
        gap: 10px 13px;
        padding: 20px 15px;
        font-size: 8px;
    }

    .section {
        padding: 75px 22px;
    }

    .section-heading {
        align-items: flex-start;
        flex-direction: column;
        gap: 18px;
        margin-bottom: 32px;
    }

    .section-heading h2,
    .about-content h2 {
        font-size: 36px;
    }

    .section-heading > p {
        font-size: 13px;
    }

    .services-grid {
        grid-template-columns: 1fr;
        gap: 13px;
    }

    .service-card {
        min-height: auto;
        padding: 24px;
    }

    .service-icon {
        margin-top: 18px;
    }

    .service-card h3 {
        margin-top: 17px;
    }

    .service-card p {
        margin-bottom: 22px;
    }

    .about-section {
        grid-template-columns: 1fr;
        gap: 32px;
        padding: 65px 22px;
    }

    .about-mark {
        width: 100px;
        height: 100px;
    }

    .about-mark span {
        font-size: 34px;
    }

    .about-side-note {
        grid-column: auto;
        gap: 12px 20px;
    }

    .process-grid {
        grid-template-columns: 1fr 1fr;
        row-gap: 28px;
    }

    .process-item {
        padding: 20px 15px 0 0;
    }

    .process-item + .process-item {
        padding-left: 15px;
    }

    .process-item:nth-child(3) {
        padding-left: 0;
        border-left: none;
    }

    .process-item h3 {
        font-size: 16px;
    }

    .process-item p {
        font-size: 12px;
    }

    .contact-section {
        grid-template-columns: 1fr;
        gap: 35px;
        padding: 70px 22px;
    }

    .contact-content h2 {
        font-size: 40px;
    }

    .footer {
        align-items: flex-start;
        flex-direction: column;
        gap: 16px;
        padding: 28px 22px;
    }

    .footer > p {
        margin: 0;
    }

    .copyright {
        margin-top: 8px;
    }
}


/* ========================================
   14. ACCESIBILIDAD
======================================== */

@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        scroll-behavior: auto !important;
        transition-duration: 0.01ms !important;
        animation-duration: 0.01ms !important;
    }
}
/* Logo de FlowSM Ingeniería */
.brand-logo {
    display: block;
    width: 100%;
    height: 100%;
    object-fit: contain;
}

/* Imagen principal de portada */
.hero-image {
    display: block;
    width: 100%;
    height: 100%;
    object-fit: cover;
}