/* ===================================
   LUDKAM - Modern Industrial Website
   Desarrolladora Ludkam S.A. de C.V.
   =================================== */

/* ===================================
   Variables CSS
   =================================== */

:root {
    /* Colores Principales */
    --color-primary: #0A4D68;
    --color-primary-dark: #083A4F;
    --color-primary-light: #0B6589;
    --color-secondary: #088395;
    --color-accent: #05BFDB;

    /* Colores Neutros */
    --color-dark: #1A1A1A;
    --color-gray-dark: #333333;
    --color-gray: #4A4A4A;
    --color-gray-medium: #6B6B6B;
    --color-gray-light: #AFAFAF;
    --color-gray-lighter: #E5E5E5;
    --color-gray-lightest: #F5F5F5;
    --color-white: #FFFFFF;
    --color-bg: #FAFAFA;

    /* Tipografía */
    --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-size-base: 16px;

    /* Pesos de Fuente */
    --font-weight-light: 300;
    --font-weight-normal: 400;
    --font-weight-medium: 500;
    --font-weight-semibold: 600;
    --font-weight-bold: 700;
    --font-weight-extrabold: 800;

    /* Espaciado */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    --spacing-xxl: 4rem;
    --spacing-xxxl: 6rem;

    /* Otros */
    --border-radius-sm: 6px;
    --border-radius: 12px;
    --border-radius-lg: 16px;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-fast: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.04), 0 1px 4px rgba(0, 0, 0, 0.04);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.07), 0 2px 4px rgba(0, 0, 0, 0.05);
    --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.1), 0 4px 6px rgba(0, 0, 0, 0.05);
    --shadow-xl: 0 20px 25px rgba(0, 0, 0, 0.1), 0 10px 10px rgba(0, 0, 0, 0.04);
    --container-width: 1280px;
    --container-width-narrow: 1024px;
}

/* ===================================
   Reset y Base
   =================================== */

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

html {
    font-size: var(--font-size-base);
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-primary);
    font-weight: var(--font-weight-normal);
    line-height: 1.6;
    color: var(--color-gray-dark);
    background-color: var(--color-white);
    overflow-x: hidden;
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

a {
    color: inherit;
    text-decoration: none;
    transition: var(--transition);
}

ul {
    list-style: none;
}

button {
    font-family: inherit;
    cursor: pointer;
}

/* ===================================
   Layout Utilities
   =================================== */

.container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
}

.container--narrow {
    max-width: var(--container-width-narrow);
}

.lead {
    font-size: 1.25rem;
    font-weight: var(--font-weight-normal);
    line-height: 1.7;
    color: var(--color-gray);
}

.highlight {
    color: var(--color-accent);
    font-weight: var(--font-weight-extrabold);
}

/* ===================================
   Buttons
   =================================== */

.btn {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: 0.875rem 1.75rem;
    font-size: 1rem;
    font-weight: var(--font-weight-semibold);
    text-align: center;
    border: 2px solid transparent;
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: var(--transition);
    white-space: nowrap;
}

.btn--primary {
    background-color: var(--color-primary);
    color: var(--color-white);
    border-color: var(--color-primary);
}

.btn--primary:hover {
    background-color: var(--color-primary-dark);
    border-color: var(--color-primary-dark);
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

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

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

.btn--outline:hover {
    background-color: var(--color-primary);
    color: var(--color-white);
    transform: translateY(-2px);
}

.btn--white {
    background-color: var(--color-white);
    color: var(--color-primary);
    border-color: var(--color-white);
}

.btn--white:hover {
    background-color: transparent;
    color: var(--color-white);
    border-color: var(--color-white);
}

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

.btn--outline-white:hover {
    background-color: var(--color-white);
    color: var(--color-primary);
}

.btn--large {
    padding: 1.125rem 2.25rem;
    font-size: 1.0625rem;
}

.btn--small {
    padding: 0.625rem 1.25rem;
    font-size: 0.875rem;
}

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

/* ===================================
   Header / Navigation
   =================================== */

.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background-color: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    box-shadow: var(--shadow-sm);
    z-index: 1000;
    transition: var(--transition);
}

.header__content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    /*padding: 1rem 0;*/
}

/* Logo */
.logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.logo__icon svg {
    display: block;
}

.logo__text {
    display: flex;
    flex-direction: column;
    gap: 0.125rem;
}

.logo__name {
    font-size: 1.375rem;
    font-weight: var(--font-weight-extrabold);
    color: var(--color-primary);
    letter-spacing: 0.5px;
    line-height: 1;
}

.logo__tagline {
    font-size: 0.6875rem;
    font-weight: var(--font-weight-medium);
    color: var(--color-gray-medium);
    letter-spacing: 0.5px;
    text-transform: uppercase;
    line-height: 1;
}

/* Header Logo Responsivo */
.header__logo-img {
    height: 120px;
    width: auto;
    max-width: 100%;
    display: block;
    transition: var(--transition);
}

/* Navigation */
.nav__list {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.nav__link {
    font-size: 0.9375rem;
    font-weight: var(--font-weight-medium);
    color: var(--color-gray-dark);
    position: relative;
    padding: 0.625rem 1rem;
    border-radius: var(--border-radius-sm);
    transition: var(--transition);
}

.nav__link:hover {
    color: var(--color-primary);
    background-color: var(--color-gray-lightest);
}

.nav__link.active {
    color: var(--color-primary);
    font-weight: var(--font-weight-semibold);
}

.nav__link--cta {
    background-color: var(--color-primary);
    color: var(--color-white);
    padding: 0.625rem 1.5rem;
}

.nav__link--cta:hover {
    background-color: var(--color-primary-dark);
}

.nav__toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    padding: 0.5rem;
}

.nav__toggle span {
    width: 25px;
    height: 3px;
    background-color: var(--color-primary);
    border-radius: 2px;
    transition: var(--transition);
}

/* ===================================
   Hero Section
   =================================== */

.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding-top: 80px;
    overflow: hidden;
}

.hero--home {
    min-height: calc(100vh - 60px);
    padding-top: 120px;
    padding-bottom: var(--spacing-xxxl);
}

.hero__background {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-secondary) 100%);
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    z-index: -1;
}

/* Hero con imagen de fondo */
.hero--with-image .hero__background {
    background-size: cover;
    background-position: center;
}

.hero--with-image .hero__overlay {
    background: linear-gradient(135deg, rgba(10, 77, 104, 0.95) 25%, rgba(8, 131, 149, 0.15) 100%);
}

.hero__overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: radial-gradient(circle at 30% 50%, rgba(5, 191, 219, 0.15) 0%, transparent 50%);
}

.hero__pattern {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image:
        repeating-linear-gradient(
            90deg,
            transparent,
            transparent 50px,
            rgba(255, 255, 255, 0.03) 50px,
            rgba(255, 255, 255, 0.03) 51px
        ),
        repeating-linear-gradient(
            0deg,
            transparent,
            transparent 50px,
            rgba(255, 255, 255, 0.03) 50px,
            rgba(255, 255, 255, 0.03) 51px
        );
}

.hero__content {
    position: relative;
    z-index: 2;
    max-width: 900px;
    color: var(--color-white);
    animation: fadeInUp 1s ease;
}

.hero__badge {
    display: inline-block;
    background-color: rgba(255, 255, 255, 0.15);
    backdrop-filter: blur(10px);
    color: var(--color-white);
    padding: 0.5rem 1.25rem;
    border-radius: 50px;
    font-size: 0.875rem;
    font-weight: var(--font-weight-semibold);
    margin-bottom: var(--spacing-md);
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.hero__title {
    font-size: 3.75rem;
    font-weight: var(--font-weight-extrabold);
    line-height: 1.15;
    margin-bottom: var(--spacing-md);
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.hero__subtitle {
    font-size: 1.25rem;
    font-weight: var(--font-weight-normal);
    line-height: 1.7;
    margin-bottom: var(--spacing-xl);
    opacity: 0.95;
    max-width: 700px;
}

.hero__buttons {
    display: flex;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-xxl);
    flex-wrap: wrap;
}

.hero__stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-xl);
    max-width: 700px;
}

.stat {
    text-align: left;
}

.stat__number {
    font-size: 3rem;
    font-weight: var(--font-weight-extrabold);
    line-height: 1;
    margin-bottom: var(--spacing-xs);
    color: var(--color-accent);
}

.stat__label {
    font-size: 0.9375rem;
    font-weight: var(--font-weight-medium);
    opacity: 0.9;
}

/* ===================================
   Sections
   =================================== */

.section {
    padding: var(--spacing-xxxl) 0;
}

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

.section__header {
    text-align: center;
    margin-bottom: var(--spacing-xxl);
}

.section__label {
    display: inline-block;
    font-size: 0.875rem;
    font-weight: var(--font-weight-semibold);
    color: var(--color-accent);
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: var(--spacing-sm);
}

.section__title {
    font-size: 2.75rem;
    font-weight: var(--font-weight-extrabold);
    color: var(--color-primary);
    line-height: 1.2;
    margin-bottom: var(--spacing-md);
}

.section__subtitle {
    font-size: 1.125rem;
    color: var(--color-gray);
    max-width: 700px;
    margin: 0 auto;
}

.section__cta {
    text-align: center;
    margin-top: var(--spacing-xl);
}

/* ===================================
   Services Preview
   =================================== */

.services__grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-lg);
}

.service__card {
    background-color: var(--color-white);
    padding: var(--spacing-xl);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-md);
    transition: var(--transition);
    border: 1px solid transparent;
}

.service__card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
    border-color: var(--color-accent);
}

.service__icon {
    width: 72px;
    height: 72px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-secondary) 100%);
    border-radius: var(--border-radius);
    margin-bottom: var(--spacing-md);
}

.service__icon svg {
    stroke: var(--color-white);
}

.service__card h3 {
    font-size: 1.375rem;
    font-weight: var(--font-weight-bold);
    color: var(--color-primary);
    margin-bottom: var(--spacing-sm);
}

.service__card p {
    color: var(--color-gray);
    margin-bottom: var(--spacing-md);
    line-height: 1.7;
}

.service__link {
    color: var(--color-accent);
    font-weight: var(--font-weight-semibold);
    display: inline-flex;
    align-items: center;
    gap: 0.25rem;
}

.service__link:hover {
    gap: 0.5rem;
}

/* ===================================
   Featured Projects
   =================================== */

.featured-projects {
    background-color: var(--color-white);
}

.projects__grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: var(--spacing-lg);
}

.project__featured {
    background-color: var(--color-white);
    border-radius: var(--border-radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-md);
    transition: var(--transition);
}

.project__featured:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
}

.project__image {
    position: relative;
    height: 250px;
    background: linear-gradient(135deg, var(--color-primary-light) 0%, var(--color-secondary) 100%);
    overflow: hidden;
}

.project__overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image:
        repeating-linear-gradient(
            45deg,
            transparent,
            transparent 35px,
            rgba(255, 255, 255, 0.05) 35px,
            rgba(255, 255, 255, 0.05) 70px
        );
}

.project__content {
    padding: var(--spacing-lg);
}

.project__tag {
    display: inline-block;
    background-color: var(--color-accent);
    color: var(--color-white);
    padding: 0.375rem 0.875rem;
    border-radius: 50px;
    font-size: 0.75rem;
    font-weight: var(--font-weight-semibold);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: var(--spacing-sm);
}

.project__content h3 {
    font-size: 1.375rem;
    font-weight: var(--font-weight-bold);
    color: var(--color-primary);
    margin-bottom: var(--spacing-sm);
    line-height: 1.3;
}

.project__content > p {
    color: var(--color-gray);
    margin-bottom: var(--spacing-md);
    line-height: 1.6;
}

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

.project__highlights li {
    font-size: 0.9375rem;
    color: var(--color-gray-medium);
    padding-left: 1.5rem;
    position: relative;
}

.project__highlights li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--color-accent);
    font-weight: var(--font-weight-bold);
}

/* ===================================
   Why Us Section
   =================================== */

.why-us__content {
    display: grid;
    grid-template-columns: 1.2fr 1fr;
    gap: var(--spacing-xxl);
    align-items: center;
}

.why-us__text .section__title {
    text-align: left;
    margin-bottom: var(--spacing-md);
}

.why-us__text .lead {
    margin-bottom: var(--spacing-lg);
}

.features__list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-xl);
}

.feature__item {
    display: flex;
    gap: var(--spacing-md);
    align-items: flex-start;
}

.feature__icon {
    width: 40px;
    height: 40px;
    flex-shrink: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: var(--color-accent);
    color: var(--color-white);
    border-radius: var(--border-radius);
    font-size: 1.25rem;
    font-weight: var(--font-weight-bold);
}

.feature__content h4 {
    font-size: 1.125rem;
    font-weight: var(--font-weight-semibold);
    color: var(--color-primary);
    margin-bottom: 0.25rem;
}

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

.why-us__image {
    position: relative;
}

.image__placeholder {
    border-radius: var(--border-radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-lg);
}

/* ===================================
   CTA Section
   =================================== */

.cta-section {
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-secondary) 100%);
    background-size: cover;
    background-position: center center;
    background-repeat: no-repeat;
    color: var(--color-white);
    position: relative;
    overflow: hidden;
}

.cta-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image:
        repeating-linear-gradient(
            45deg,
            transparent,
            transparent 35px,
            rgba(255, 255, 255, 0.03) 35px,
            rgba(255, 255, 255, 0.03) 70px
        );
}

.cta__content {
    position: relative;
    z-index: 1;
    text-align: center;
    max-width: 800px;
    margin: 0 auto;
}

.cta__content h2 {
    font-size: 2.5rem;
    font-weight: var(--font-weight-extrabold);
    margin-bottom: var(--spacing-md);
    line-height: 1.2;
}

.cta__content p {
    font-size: 1.25rem;
    margin-bottom: var(--spacing-xl);
    opacity: 0.95;
}

.cta__buttons {
    display: flex;
    gap: var(--spacing-md);
    justify-content: center;
    flex-wrap: wrap;
}

/* Clases de utilidad para posición de background */
.bg-position-top {
    background-position: center top !important;
}

.bg-position-bottom {
    background-position: center bottom !important;
}

.bg-position-left {
    background-position: left center !important;
}

.bg-position-right {
    background-position: right center !important;
}

.bg-position-center {
    background-position: center center !important;
}

.bg-position-top-left {
    background-position: left top !important;
}

.bg-position-top-right {
    background-position: right top !important;
}

.bg-position-bottom-left {
    background-position: left bottom !important;
}

.bg-position-bottom-right {
    background-position: right bottom !important;
}

/* ===================================
   Footer
   =================================== */

.footer {
    background-color: var(--color-dark);
    color: var(--color-gray-light);
    padding: var(--spacing-xxl) 0 var(--spacing-lg);
}

.footer__content {
    display: grid;
    grid-template-columns: 2fr repeat(3, 1fr);
    gap: var(--spacing-xxl);
    margin-bottom: var(--spacing-xl);
}

.footer__section h4 {
    color: var(--color-white);
    font-weight: var(--font-weight-semibold);
    margin-bottom: var(--spacing-md);
}

.footer__section--main p {
    margin-bottom: var(--spacing-sm);
    line-height: 1.7;
}

.footer__company {
    font-weight: var(--font-weight-semibold);
    color: var(--color-white);
}

.footer__links li {
    margin-bottom: var(--spacing-xs);
}

.footer__links a {
    transition: var(--transition-fast);
}

.footer__links a:hover {
    color: var(--color-accent);
    padding-left: 5px;
}

.footer__contact {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.footer__contact li {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-sm);
}

.footer__contact svg {
    flex-shrink: 0;
    margin-top: 2px;
}

.footer__bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding-top: var(--spacing-md);
    text-align: center;
    font-size: 0.9375rem;
}

/* Footer Logo */
.footer__logo {
    margin-bottom: var(--spacing-md);
}

.footer__logo-img {
    height: 80px;
    width: auto;
    max-width: 100%;
    display: block;
}

/* Invertir color del logo para fondo oscuro */
.logo-inverted {
    filter: invert(1) brightness(1.2);
}

/* ===================================
   Animations
   =================================== */

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

.fade-in {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}

/* ===================================
   Responsive Design
   =================================== */

@media (max-width: 1024px) {
    .why-us__content,
    .footer__content {
        grid-template-columns: 1fr;
    }

    .hero__stats {
        grid-template-columns: repeat(3, 1fr);
        gap: var(--spacing-md);
    }
}

@media (max-width: 768px) {
    :root {
        --spacing-xxxl: 4rem;
        --spacing-xxl: 3rem;
        --spacing-xl: 2rem;
    }

    .container {
        padding: 0 var(--spacing-md);
    }

    /* Navigation Mobile */
    .nav__list {
        position: fixed;
        top: 70px;
        left: 0;
        width: 100%;
        background-color: var(--color-white);
        flex-direction: column;
        padding: var(--spacing-md);
        box-shadow: var(--shadow-lg);
        transform: translateX(-100%);
        transition: transform 0.3s ease;
        gap: 0;
    }

    .nav__list.active {
        transform: translateX(0);
    }

    .nav__item {
        width: 100%;
    }

    .nav__link {
        display: block;
        width: 100%;
        padding: var(--spacing-sm);
    }

    .nav__toggle {
        display: flex;
    }

    .nav__toggle.active span:nth-child(1) {
        transform: rotate(45deg) translate(8px, 8px);
    }

    .nav__toggle.active span:nth-child(2) {
        opacity: 0;
    }

    .nav__toggle.active span:nth-child(3) {
        transform: rotate(-45deg) translate(7px, -7px);
    }

    /* Logo Responsivo */
    .header__logo-img {
        height: 65px;
    }

    .footer__logo-img {
        height: 60px;
    }

    /* Hero */
    .hero__title {
        font-size: 2.5rem;
    }

    .hero__subtitle {
        font-size: 1.125rem;
    }

    .hero__buttons {
        flex-direction: column;
    }

    .hero__stats {
        grid-template-columns: 1fr;
        gap: var(--spacing-md);
    }

    .stat__number {
        font-size: 2.5rem;
    }

    /* Sections */
    .section__title {
        font-size: 2rem;
    }

    .services__grid,
    .projects__grid {
        grid-template-columns: 1fr;
    }

    .footer__content {
        grid-template-columns: 1fr;
        gap: var(--spacing-lg);
    }
}

@media (max-width: 480px) {
    /* Logo Responsivo */
    .header__logo-img {
        height: 50px;
    }

    .footer__logo-img {
        height: 50px;
    }

    .hero__title {
        font-size: 2rem;
    }

    .section__title {
        font-size: 1.75rem;
    }

    .cta__content h2 {
        font-size: 2rem;
    }

    .btn--large {
        padding: 1rem 1.75rem;
    }
}