/* ===== VARIABLES ===== */
:root {
    --color-bg-dark: #0a1628;
    --color-bg-navy: #0f2847;
    --color-primary: #e8762d;
    --color-primary-light: #f5a623;
    --color-gradient: linear-gradient(135deg, #e8762d 0%, #f5a623 100%);
    --color-white: #ffffff;
    --color-light: #f5f7fa;
    --color-gray-100: #e8ecf1;
    --color-gray-200: #c9d1db;
    --color-gray-400: #8896a7;
    --color-gray-600: #4a5568;
    --color-gray-800: #1a202c;
    --color-text: #1a1a2e;
    --color-text-light: #cbd5e1;
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --container-max: 1140px;
    --radius: 12px;
    --radius-sm: 8px;
    --shadow: 0 4px 6px -1px rgba(0,0,0,.07), 0 2px 4px -2px rgba(0,0,0,.05);
    --shadow-lg: 0 20px 40px -12px rgba(0,0,0,.12);
    --shadow-xl: 0 25px 50px -12px rgba(0,0,0,.15);
    --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
    scroll-behavior: smooth;
    scroll-padding-top: 80px;
}

body {
    font-family: var(--font-family);
    color: var(--color-text);
    line-height: 1.6;
    background: var(--color-white);
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
}

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

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

ul { list-style: none; }

.container {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 24px;
}

/* ===== NAVBAR ===== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: 16px 0;
    transition: var(--transition);
    background: transparent;
}

.navbar--scrolled {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    box-shadow: 0 1px 3px rgba(0,0,0,.08);
    padding: 10px 0;
}

.navbar__inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.navbar__logo-img {
    height: 44px;
    width: auto;
    border-radius: 6px;
    transition: var(--transition);
}

.navbar--scrolled .navbar__logo-img {
    height: 38px;
}

.navbar__links {
    display: flex;
    gap: 32px;
}

.navbar__links a {
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--color-white);
    position: relative;
    padding: 4px 0;
}

.navbar--scrolled .navbar__links a {
    color: var(--color-gray-600);
}

.navbar__links a:hover {
    color: var(--color-primary);
}

.navbar__links a::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--color-gradient);
    transition: var(--transition);
    border-radius: 1px;
}

.navbar__links a:hover::after {
    width: 100%;
}

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

.lang-toggle {
    background: rgba(255,255,255,.15);
    border: 1px solid rgba(255,255,255,.25);
    color: var(--color-white);
    padding: 6px 14px;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    font-family: var(--font-family);
    letter-spacing: 0.5px;
}

.navbar--scrolled .lang-toggle {
    background: var(--color-light);
    border-color: var(--color-gray-200);
    color: var(--color-gray-600);
}

.lang-toggle:hover {
    background: var(--color-primary);
    border-color: var(--color-primary);
    color: white;
}

.navbar__hamburger {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 4px;
}

.navbar__hamburger span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--color-white);
    transition: var(--transition);
    border-radius: 1px;
}

.navbar--scrolled .navbar__hamburger span {
    background: var(--color-gray-800);
}

.navbar__hamburger.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
}

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

.navbar__hamburger.active span:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -5px);
}

/* ===== HERO ===== */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    background: var(--color-bg-dark);
}

.hero__bg {
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, var(--color-bg-dark) 0%, var(--color-bg-navy) 50%, #0d2240 100%);
}

.hero__particles {
    position: absolute;
    inset: 0;
    overflow: hidden;
}

.hero__particle {
    position: absolute;
    width: 3px;
    height: 3px;
    background: rgba(232, 118, 45, 0.3);
    border-radius: 50%;
    animation: float-particle linear infinite;
}

@keyframes float-particle {
    0% {
        transform: translateY(100vh) rotate(0deg);
        opacity: 0;
    }
    10% { opacity: 1; }
    90% { opacity: 1; }
    100% {
        transform: translateY(-10vh) rotate(720deg);
        opacity: 0;
    }
}

.hero__content {
    position: relative;
    z-index: 2;
    text-align: center;
    padding: 120px 24px 80px;
    max-width: 800px;
}

.hero__logo {
    width: 100%;
    max-width: 900px;
    margin: 0 auto 32px;
    border-radius: 8px;
    filter: drop-shadow(0 4px 20px rgba(0,0,0,.3));
}

.hero__subtitle {
    font-size: 1.15rem;
    color: var(--color-text-light);
    margin-bottom: 40px;
    line-height: 1.7;
    font-weight: 300;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.hero__cta {
    display: flex;
    gap: 16px;
    justify-content: center;
    flex-wrap: wrap;
}

.hero__scroll {
    position: absolute;
    bottom: 32px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 2;
    animation: bounce 2s ease-in-out infinite;
}

.hero__scroll a {
    color: var(--color-gray-400);
}

.hero__scroll a:hover {
    color: var(--color-primary);
}

@keyframes bounce {
    0%, 100% { transform: translateX(-50%) translateY(0); }
    50% { transform: translateX(-50%) translateY(8px); }
}

/* ===== BUTTONS ===== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 14px 32px;
    border-radius: var(--radius-sm);
    font-size: 0.95rem;
    font-weight: 600;
    font-family: var(--font-family);
    cursor: pointer;
    transition: var(--transition);
    border: 2px solid transparent;
}

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

.btn--primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(232, 118, 45, 0.35);
}

.btn--outline {
    background: transparent;
    color: var(--color-white);
    border-color: rgba(255,255,255,.3);
}

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

.btn--full {
    width: 100%;
}

/* ===== SECTIONS ===== */
.section {
    padding: 100px 0;
}

.section__title {
    font-size: 2.2rem;
    font-weight: 700;
    text-align: center;
    margin-bottom: 16px;
    color: var(--color-text);
    letter-spacing: -0.02em;
}

.section__title--left {
    text-align: left;
}

.section__subtitle {
    text-align: center;
    color: var(--color-gray-600);
    font-size: 1.1rem;
    max-width: 600px;
    margin: 0 auto 60px;
    line-height: 1.7;
}

/* ===== PROBLEMS ===== */
.problems {
    background: var(--color-light);
}

.problems__grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.problem-card {
    background: var(--color-white);
    border-radius: var(--radius);
    padding: 32px 28px;
    transition: var(--transition);
    border: 1px solid var(--color-gray-100);
}

.problem-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
    border-color: transparent;
}

.problem-card__icon {
    width: 48px;
    height: 48px;
    border-radius: 12px;
    background: linear-gradient(135deg, rgba(232, 118, 45, 0.1) 0%, rgba(245, 166, 35, 0.1) 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 20px;
}

.problem-card__icon svg {
    width: 24px;
    height: 24px;
    stroke: var(--color-primary);
}

.problem-card h3 {
    font-size: 1.05rem;
    font-weight: 600;
    margin-bottom: 10px;
    color: var(--color-text);
}

.problem-card p {
    font-size: 0.9rem;
    color: var(--color-gray-600);
    line-height: 1.6;
    font-style: italic;
}

/* ===== SERVICES ===== */
.services__grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.service-card {
    background: var(--color-white);
    border-radius: var(--radius);
    padding: 36px 28px;
    transition: var(--transition);
    border: 1px solid var(--color-gray-100);
    position: relative;
    overflow: hidden;
}

.service-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--color-gradient);
    transform: scaleX(0);
    transition: var(--transition);
    transform-origin: left;
}

.service-card:hover::before {
    transform: scaleX(1);
}

.service-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
    border-color: transparent;
}

.service-card__icon {
    width: 56px;
    height: 56px;
    border-radius: 14px;
    background: linear-gradient(135deg, var(--color-bg-dark) 0%, var(--color-bg-navy) 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 24px;
}

.service-card__icon svg {
    width: 28px;
    height: 28px;
    stroke: var(--color-primary-light);
}

.service-card h3 {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 12px;
    color: var(--color-text);
}

.service-card p {
    font-size: 0.9rem;
    color: var(--color-gray-600);
    line-height: 1.7;
}

/* ===== ABOUT ===== */
.about {
    background: var(--color-light);
}

.about__inner {
    display: grid;
    grid-template-columns: 1fr 1.4fr;
    gap: 60px;
    align-items: center;
}

.about__image {
    position: relative;
}

.about__image img {
    border-radius: var(--radius);
    box-shadow: var(--shadow-xl);
    width: 100%;
    aspect-ratio: 1;
    object-fit: cover;
}

.about__image::after {
    content: '';
    position: absolute;
    bottom: -12px;
    right: -12px;
    width: 120px;
    height: 120px;
    border: 3px solid var(--color-primary);
    border-radius: var(--radius);
    z-index: -1;
    opacity: 0.5;
}

.about__name {
    font-size: 1.4rem;
    font-weight: 700;
    margin-bottom: 4px;
    color: var(--color-text);
}

.about__role {
    font-size: 1rem;
    color: var(--color-primary);
    font-weight: 500;
    margin-bottom: 24px;
}

.about__text {
    font-size: 0.95rem;
    color: var(--color-gray-600);
    line-height: 1.8;
    margin-bottom: 16px;
}

.about__certs {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-top: 24px;
}

.cert-badge {
    display: inline-block;
    padding: 6px 16px;
    background: linear-gradient(135deg, rgba(232, 118, 45, 0.08) 0%, rgba(245, 166, 35, 0.08) 100%);
    color: var(--color-primary);
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 600;
    border: 1px solid rgba(232, 118, 45, 0.2);
}

/* ===== TECH STACK ===== */
.tech__grid {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 16px;
    max-width: 900px;
    margin: 0 auto;
}

.tech-badge {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 12px 22px;
    background: var(--color-white);
    border: 1px solid var(--color-gray-100);
    border-radius: 40px;
    transition: var(--transition);
    cursor: default;
}

.tech-badge:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-lg);
    border-color: transparent;
}

.tech-badge svg {
    width: 22px;
    height: 22px;
    flex-shrink: 0;
    stroke: var(--color-primary);
}

.tech-badge span {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--color-gray-800);
    white-space: nowrap;
}

/* ===== CONTACT ===== */
.contact {
    background: var(--color-light);
}

.contact__inner {
    display: grid;
    grid-template-columns: 1.2fr 1fr;
    gap: 48px;
    align-items: start;
}

.contact__form {
    background: var(--color-white);
    padding: 40px;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
}

.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--color-gray-800);
    margin-bottom: 6px;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 12px 16px;
    border: 1.5px solid var(--color-gray-200);
    border-radius: var(--radius-sm);
    font-size: 0.95rem;
    font-family: var(--font-family);
    color: var(--color-text);
    transition: var(--transition);
    background: var(--color-white);
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(232, 118, 45, 0.1);
}

.form-group textarea {
    resize: vertical;
    min-height: 120px;
}

.form-status {
    margin-top: 16px;
    padding: 0;
    font-size: 0.9rem;
    font-weight: 500;
    text-align: center;
    border-radius: var(--radius-sm);
    transition: var(--transition);
}

.form-status.success {
    padding: 12px;
    background: rgba(16, 185, 129, 0.1);
    color: #059669;
}

.form-status.error {
    padding: 12px;
    background: rgba(239, 68, 68, 0.1);
    color: #dc2626;
}

.contact__info {
    display: flex;
    flex-direction: column;
    gap: 28px;
    padding-top: 20px;
}

.contact__info-item {
    display: flex;
    align-items: flex-start;
    gap: 16px;
}

.contact__info-item svg {
    width: 24px;
    height: 24px;
    flex-shrink: 0;
    stroke: var(--color-primary);
    margin-top: 2px;
}

.contact__info-item strong {
    display: block;
    font-size: 0.85rem;
    color: var(--color-gray-800);
    margin-bottom: 2px;
}

.contact__info-item a,
.contact__info-item span {
    font-size: 0.9rem;
    color: var(--color-gray-600);
}

.contact__info-item a:hover {
    color: var(--color-primary);
}

.contact__socials {
    display: flex;
    gap: 14px;
    margin-top: 12px;
}

.social-link {
    width: 44px;
    height: 44px;
    border-radius: 50%;
    background: var(--color-white);
    display: flex;
    align-items: center;
    justify-content: center;
    border: 1px solid var(--color-gray-200);
    transition: var(--transition);
}

.social-link svg {
    width: 20px;
    height: 20px;
    fill: var(--color-gray-600);
    transition: var(--transition);
}

.social-link:hover {
    background: var(--color-primary);
    border-color: var(--color-primary);
    transform: translateY(-2px);
}

.social-link:hover svg {
    fill: var(--color-white);
}

/* ===== FOOTER ===== */
.footer {
    background: var(--color-bg-dark);
    padding: 40px 0;
}

.footer__inner {
    text-align: center;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
}

.footer__logo {
    height: 36px;
    border-radius: 4px;
    opacity: 0.8;
}

.footer__text {
    font-size: 0.85rem;
    color: var(--color-gray-400);
}

.footer__location {
    font-size: 0.8rem;
    color: var(--color-gray-400);
    opacity: 0.7;
}

/* ===== WHATSAPP BUTTON ===== */
.whatsapp-btn {
    position: fixed;
    bottom: 28px;
    right: 28px;
    width: 60px;
    height: 60px;
    background: #25d366;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 4px 16px rgba(37, 211, 102, 0.4);
    z-index: 999;
    transition: var(--transition);
    animation: pulse-wa 2s ease-in-out infinite;
}

.whatsapp-btn svg {
    width: 32px;
    height: 32px;
}

.whatsapp-btn:hover {
    transform: scale(1.1);
    box-shadow: 0 6px 24px rgba(37, 211, 102, 0.5);
}

@keyframes pulse-wa {
    0%, 100% { box-shadow: 0 4px 16px rgba(37, 211, 102, 0.4); }
    50% { box-shadow: 0 4px 24px rgba(37, 211, 102, 0.6); }
}

/* ===== ANIMATIONS ===== */
.animate-fade-up {
    opacity: 0;
    transform: translateY(30px);
    animation: fadeUp 0.8s ease forwards;
}

.delay-1 { animation-delay: 0.2s; }
.delay-2 { animation-delay: 0.4s; }

@keyframes fadeUp {
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.animate-on-scroll {
    opacity: 0;
    transform: translateY(24px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.animate-on-scroll.visible {
    opacity: 1;
    transform: translateY(0);
}

/* ===== RESPONSIVE ===== */
@media (max-width: 1024px) {
    .problems__grid,
    .services__grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .about__inner,
    .contact__inner {
        grid-template-columns: 1fr;
        gap: 40px;
    }

    .about__image {
        max-width: 360px;
        margin: 0 auto;
    }

    .about__content .section__title {
        text-align: center;
    }

    .about__name,
    .about__role {
        text-align: center;
    }

    .about__certs {
        justify-content: center;
    }
}

@media (max-width: 768px) {
    .navbar__links {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: rgba(255,255,255,.98);
        backdrop-filter: blur(20px);
        flex-direction: column;
        padding: 20px 24px;
        gap: 0;
        box-shadow: var(--shadow);
    }

    .navbar__links.active {
        display: flex;
    }

    .navbar__links a {
        color: var(--color-gray-800) !important;
        padding: 12px 0;
        border-bottom: 1px solid var(--color-gray-100);
        display: block;
    }

    .navbar__links li:last-child a {
        border-bottom: none;
    }

    .navbar__hamburger {
        display: flex;
    }

    .hero__logo {
        max-width: 95%;
        width: 600px;
    }

    .hero__subtitle {
        font-size: 1rem;
    }

    .hero__cta {
        flex-direction: column;
        align-items: center;
    }

    .section {
        padding: 70px 0;
    }

    .section__title {
        font-size: 1.8rem;
    }

    .section__subtitle {
        font-size: 1rem;
        margin-bottom: 40px;
    }

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

    .contact__form {
        padding: 28px;
    }

    .btn {
        padding: 12px 28px;
    }
}

@media (max-width: 480px) {
    .hero__logo {
        max-width: 95%;
        width: 480px;
    }

    .section__title {
        font-size: 1.5rem;
    }

    .tech__grid {
        gap: 16px;
    }

    .tech-item {
        min-width: 80px;
        padding: 16px;
    }

    .tech-item svg {
        width: 40px;
        height: 40px;
    }

    .whatsapp-btn {
        bottom: 20px;
        right: 20px;
        width: 54px;
        height: 54px;
    }
}