/* ============================
   CULTURETECH — STYLESHEET
   Style : sobre, institutionnel
   Palette : navy, gris, blanc
   Police : Inter (sans-serif)
   ============================ */

/* ---------- VARIABLES ---------- */
:root {
    --c-navy: #1B2A4A;
    --c-navy-light: #2D4068;
    --c-blue: #3B6BA5;
    --c-blue-light: #5B8BC5;
    --c-accent: #3B6BA5;
    --c-dark: #1E2330;
    --c-text: #3A3F4B;
    --c-text-light: #6B7280;
    --c-text-muted: #9CA3AF;
    --c-white: #FFFFFF;
    --c-bg: #F8F9FB;
    --c-bg-alt: #F1F3F7;
    --c-border: #E2E5EA;
    --c-border-light: #EDF0F4;

    --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;

    --radius: 8px;
    --radius-sm: 6px;
    --radius-lg: 12px;

    --shadow-sm: 0 1px 3px rgba(27, 42, 74, 0.06);
    --shadow-md: 0 4px 16px rgba(27, 42, 74, 0.08);
    --shadow-lg: 0 12px 40px rgba(27, 42, 74, 0.12);

    --transition: 0.3s ease;
    --max-width: 1200px;
}

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

html {
    scroll-behavior: smooth;
    scroll-padding-top: 72px;
}

body {
    font-family: var(--font);
    color: var(--c-text);
    background: var(--c-bg);
    line-height: 1.7;
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    overflow-x: hidden;
}

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

ul {
    list-style: none;
}

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

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

.section {
    padding: 96px 0;
}

.section--alt {
    background: var(--c-bg-alt);
}

.section__head {
    text-align: center;
    max-width: 640px;
    margin: 0 auto 56px;
}

.section__tag {
    display: inline-block;
    font-size: 0.78rem;
    font-weight: 600;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--c-blue);
    margin-bottom: 12px;
}

.section__title {
    font-size: clamp(1.6rem, 3.5vw, 2.4rem);
    font-weight: 600;
    line-height: 1.3;
    color: var(--c-navy);
    margin-bottom: 16px;
    letter-spacing: -0.02em;
}

.section__desc {
    font-size: 1.02rem;
    color: var(--c-text-light);
}

/* ---------- BUTTONS ---------- */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 13px 30px;
    border-radius: var(--radius-sm);
    font-family: var(--font);
    font-size: 0.92rem;
    font-weight: 500;
    cursor: pointer;
    border: none;
    transition: var(--transition);
    white-space: nowrap;
}

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

.btn--primary:hover {
    background: var(--c-navy-light);
    transform: translateY(-1px);
}

.btn--ghost {
    background: transparent;
    color: var(--c-white);
    border: 1px solid rgba(255, 255, 255, 0.4);
}

.btn--ghost:hover {
    background: rgba(255, 255, 255, 0.08);
    border-color: rgba(255, 255, 255, 0.6);
}

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

/* ---------- HEADER / NAV ---------- */
.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    background: transparent;
    transition: var(--transition);
}

.header.scrolled {
    background: rgba(27, 42, 74, 0.97);
    backdrop-filter: blur(10px);
    box-shadow: 0 1px 10px rgba(0, 0, 0, 0.1);
}

.nav {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 68px;
}

.nav__logo {
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--c-white);
    letter-spacing: -0.02em;
    transition: var(--transition);
}

.nav__logo:hover {
    opacity: 0.85;
}

.nav__logo-accent {
    color: var(--c-blue-light);
    font-weight: 400;
}

.nav__menu {
    display: flex;
    align-items: center;
    gap: 32px;
}

.nav__link {
    font-size: 0.88rem;
    font-weight: 400;
    color: rgba(255, 255, 255, 0.8);
    transition: var(--transition);
    position: relative;
}

.nav__link::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 1px;
    background: var(--c-blue-light);
    transition: var(--transition);
}

.nav__link:hover {
    color: var(--c-white);
}

.nav__link:hover::after {
    width: 100%;
}

.nav__link--cta {
    background: var(--c-white);
    color: var(--c-navy);
    padding: 7px 18px;
    border-radius: var(--radius-sm);
    font-weight: 500;
}

.nav__link--cta:hover {
    background: rgba(255, 255, 255, 0.9);
    color: var(--c-navy);
}

.nav__link--cta::after {
    display: none;
}

/* Burger */
.nav__burger {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
}

.nav__burger span {
    width: 24px;
    height: 2px;
    background: var(--c-white);
    border-radius: 1px;
    transition: var(--transition);
}

.nav__burger.active span:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
}

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

.nav__burger.active span:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
}

/* ---------- HERO ---------- */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    background: var(--c-navy);
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    inset: 0;
    background:
        radial-gradient(circle at 70% 20%, rgba(59, 107, 165, 0.15) 0%, transparent 50%),
        radial-gradient(circle at 30% 80%, rgba(45, 64, 104, 0.2) 0%, transparent 50%);
}

.hero::after {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(180deg, transparent 70%, rgba(27, 42, 74, 0.4) 100%);
}

.hero__content {
    position: relative;
    z-index: 2;
    padding-top: 68px;
    text-align: center;
    color: var(--c-white);
}

.hero__badge {
    display: inline-block;
    font-size: 0.8rem;
    font-weight: 500;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--c-blue-light);
    margin-bottom: 24px;
    padding: 6px 16px;
    border: 1px solid rgba(91, 139, 197, 0.3);
    border-radius: 20px;
    opacity: 0;
    animation: fadeUp 0.8s 0.2s forwards;
}

.hero__title {
    font-size: clamp(2rem, 5vw, 3.6rem);
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 24px;
    letter-spacing: -0.03em;
    opacity: 0;
    animation: fadeUp 0.8s 0.4s forwards;
}

.hero__title-accent {
    color: var(--c-blue-light);
    font-weight: 400;
}

.hero__subtitle {
    font-size: 1.1rem;
    max-width: 600px;
    margin: 0 auto 36px;
    color: rgba(255, 255, 255, 0.75);
    line-height: 1.8;
    font-weight: 300;
    opacity: 0;
    animation: fadeUp 0.8s 0.6s forwards;
}

.hero__actions {
    display: flex;
    gap: 16px;
    justify-content: center;
    flex-wrap: wrap;
    margin-bottom: 72px;
    opacity: 0;
    animation: fadeUp 0.8s 0.8s forwards;
}

.hero__stats {
    display: flex;
    gap: 56px;
    justify-content: center;
    flex-wrap: wrap;
    opacity: 0;
    animation: fadeUp 0.8s 1s forwards;
}

.hero__stat {
    text-align: center;
}

.hero__stat-num {
    display: block;
    font-size: 2.2rem;
    font-weight: 700;
    color: var(--c-white);
    letter-spacing: -0.02em;
}

.hero__stat-label {
    font-size: 0.82rem;
    color: rgba(255, 255, 255, 0.55);
    letter-spacing: 0.03em;
}

@keyframes fadeUp {
    from { opacity: 0; transform: translateY(24px); }
    to { opacity: 1; transform: translateY(0); }
}

/* ---------- SERVICES ---------- */
.services__grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
    gap: 24px;
}

.service-card {
    background: var(--c-white);
    border-radius: var(--radius);
    padding: 32px 28px;
    border: 1px solid var(--c-border);
    transition: var(--transition);
    position: relative;
}

.service-card:hover {
    border-color: var(--c-blue);
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
}

.service-card__icon {
    font-size: 0.85rem;
    font-weight: 700;
    color: var(--c-blue);
    letter-spacing: 0.05em;
    margin-bottom: 16px;
    padding-bottom: 12px;
    border-bottom: 2px solid var(--c-border-light);
    display: inline-block;
}

.service-card__title {
    font-size: 1.15rem;
    font-weight: 600;
    color: var(--c-navy);
    margin-bottom: 10px;
    letter-spacing: -0.01em;
}

.service-card__text {
    font-size: 0.92rem;
    color: var(--c-text-light);
    margin-bottom: 18px;
    line-height: 1.65;
}

.service-card__list {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.service-card__list li {
    font-size: 0.88rem;
    color: var(--c-text);
    padding-left: 16px;
    position: relative;
}

.service-card__list li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 10px;
    width: 6px;
    height: 1px;
    background: var(--c-blue);
}

/* ---------- ABOUT ---------- */
.about__container {
    display: grid;
    grid-template-columns: 1fr 1.2fr;
    gap: 56px;
    align-items: center;
}

.about__visual {
    position: relative;
}

.about__visual-frame {
    background: var(--c-navy);
    border-radius: var(--radius-lg);
    padding: 36px;
    aspect-ratio: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow-lg);
    position: relative;
    overflow: hidden;
}

.about__visual-frame::before {
    content: '';
    position: absolute;
    inset: 0;
    background: radial-gradient(circle at 30% 30%, rgba(59, 107, 165, 0.15) 0%, transparent 60%);
}

.about__visual-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
    width: 100%;
    position: relative;
    z-index: 1;
}

.about__visual-item {
    background: rgba(255, 255, 255, 0.06);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius);
    aspect-ratio: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.82rem;
    font-weight: 500;
    color: rgba(255, 255, 255, 0.7);
    letter-spacing: 0.02em;
    transition: var(--transition);
}

.about__visual-item:hover {
    background: rgba(255, 255, 255, 0.12);
    color: var(--c-white);
}

.about__visual-badge {
    position: absolute;
    bottom: -16px;
    right: -16px;
    background: var(--c-white);
    color: var(--c-navy);
    border: 1px solid var(--c-border);
    border-radius: var(--radius);
    padding: 18px 24px;
    text-align: center;
    box-shadow: var(--shadow-md);
}

.about__visual-badge-num {
    display: block;
    font-size: 1.8rem;
    font-weight: 700;
    letter-spacing: -0.02em;
}

.about__visual-badge-text {
    font-size: 0.78rem;
    font-weight: 400;
    color: var(--c-text-light);
    line-height: 1.4;
}

.about__text {
    margin-bottom: 18px;
    color: var(--c-text-light);
    font-size: 0.98rem;
    line-height: 1.75;
}

.about__text strong {
    color: var(--c-navy);
    font-weight: 600;
}

.about__values {
    display: flex;
    flex-direction: column;
    gap: 18px;
    margin-top: 28px;
}

.about__value {
    display: flex;
    gap: 14px;
    align-items: flex-start;
}

.about__value-marker {
    flex-shrink: 0;
    width: 32px;
    height: 32px;
    border-radius: var(--radius-sm);
    background: var(--c-bg-alt);
    border: 1px solid var(--c-border);
    position: relative;
}

.about__value-marker::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--c-blue);
}

.about__value h4 {
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--c-navy);
    margin-bottom: 3px;
}

.about__value p {
    font-size: 0.88rem;
    color: var(--c-text-light);
}

/* ---------- PROJECTS ---------- */
.projects__grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(440px, 1fr));
    gap: 28px;
}

.project-card {
    background: var(--c-white);
    border-radius: var(--radius);
    overflow: hidden;
    border: 1px solid var(--c-border);
    transition: var(--transition);
}

.project-card:hover {
    border-color: var(--c-blue);
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
}

.project-card__img {
    height: 180px;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
}

.project-card__img--1 { background: var(--c-navy); }
.project-card__img--2 { background: var(--c-navy-light); }
.project-card__img--3 { background: #2A3550; }
.project-card__img--4 { background: var(--c-blue); }

.project-card__img::before {
    content: '';
    position: absolute;
    inset: 0;
    background: radial-gradient(circle at center, rgba(255,255,255,0.04) 0%, transparent 70%);
}

.project-card__label {
    font-size: 0.9rem;
    font-weight: 500;
    color: rgba(255, 255, 255, 0.5);
    letter-spacing: 0.08em;
    text-transform: uppercase;
    z-index: 1;
}

.project-card__body {
    padding: 24px;
}

.project-card__tag {
    display: inline-block;
    font-size: 0.72rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--c-blue);
    background: rgba(59, 107, 165, 0.07);
    padding: 3px 10px;
    border-radius: 4px;
    margin-bottom: 10px;
}

.project-card__title {
    font-size: 1.15rem;
    font-weight: 600;
    color: var(--c-navy);
    margin-bottom: 8px;
    letter-spacing: -0.01em;
}

.project-card__text {
    font-size: 0.92rem;
    color: var(--c-text-light);
    margin-bottom: 14px;
    line-height: 1.65;
}

.project-card__meta {
    display: flex;
    gap: 20px;
    font-size: 0.8rem;
    color: var(--c-text-muted);
    flex-wrap: wrap;
}

.project-card__meta span:first-child {
    font-weight: 500;
    color: var(--c-text-light);
}

/* ---------- TESTIMONIALS ---------- */
.testimonials__grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 24px;
}

.testimonial {
    background: var(--c-white);
    border-radius: var(--radius);
    padding: 32px 28px;
    border: 1px solid var(--c-border);
    transition: var(--transition);
}

.testimonial:hover {
    border-color: var(--c-blue);
    box-shadow: var(--shadow-md);
}

.testimonial__text {
    font-size: 0.95rem;
    color: var(--c-text);
    font-style: italic;
    margin-bottom: 20px;
    line-height: 1.75;
}

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

.testimonial__avatar {
    width: 42px;
    height: 42px;
    border-radius: 50%;
    background: var(--c-navy);
    color: var(--c-white);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.78rem;
    font-weight: 600;
    flex-shrink: 0;
    letter-spacing: 0.02em;
}

.testimonial__author strong {
    display: block;
    font-size: 0.92rem;
    color: var(--c-navy);
    font-weight: 600;
}

.testimonial__author span {
    font-size: 0.8rem;
    color: var(--c-text-light);
}

/* ---------- CONTACT ---------- */
.contact__container {
    display: grid;
    grid-template-columns: 1fr 1.1fr;
    gap: 48px;
    align-items: start;
}

.contact__desc {
    color: var(--c-text-light);
    margin-bottom: 28px;
    font-size: 0.98rem;
}

.contact__details {
    display: flex;
    flex-direction: column;
    gap: 18px;
    margin-bottom: 28px;
}

.contact__details li {
    display: flex;
    gap: 14px;
    align-items: flex-start;
}

.contact__icon {
    flex-shrink: 0;
    width: 38px;
    height: 38px;
    border-radius: var(--radius-sm);
    background: var(--c-bg-alt);
    border: 1px solid var(--c-border);
    position: relative;
}

.contact__icon::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--c-blue);
}

.contact__details strong {
    display: block;
    font-size: 0.82rem;
    color: var(--c-navy);
    margin-bottom: 2px;
    font-weight: 600;
}

.contact__details a:hover {
    color: var(--c-blue);
}

.contact__socials {
    display: flex;
    gap: 10px;
}

.contact__socials a {
    width: 40px;
    height: 40px;
    border-radius: var(--radius-sm);
    background: var(--c-bg-alt);
    border: 1px solid var(--c-border);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.82rem;
    font-weight: 600;
    color: var(--c-navy);
    transition: var(--transition);
}

.contact__socials a:hover {
    background: var(--c-navy);
    color: var(--c-white);
    border-color: var(--c-navy);
}

/* Form */
.contact__form {
    background: var(--c-white);
    border-radius: var(--radius);
    padding: 36px;
    border: 1px solid var(--c-border);
    box-shadow: var(--shadow-sm);
}

.form-group {
    margin-bottom: 18px;
}

.form-group label {
    display: block;
    font-size: 0.82rem;
    font-weight: 600;
    color: var(--c-navy);
    margin-bottom: 6px;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 11px 14px;
    border: 1px solid var(--c-border);
    border-radius: var(--radius-sm);
    font-family: var(--font);
    font-size: 0.92rem;
    color: var(--c-text);
    background: var(--c-bg);
    transition: var(--transition);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--c-blue);
    background: var(--c-white);
    box-shadow: 0 0 0 3px rgba(59, 107, 165, 0.08);
}

.form-group textarea {
    resize: vertical;
    min-height: 110px;
}

.form-error {
    display: block;
    font-size: 0.78rem;
    color: #C53030;
    margin-top: 4px;
    min-height: 1em;
}

.form-success {
    margin-top: 14px;
    padding: 14px;
    background: rgba(59, 107, 165, 0.06);
    border: 1px solid rgba(59, 107, 165, 0.2);
    border-radius: var(--radius-sm);
    color: var(--c-navy);
    font-size: 0.88rem;
    text-align: center;
}

/* ---------- FOOTER ---------- */
.footer {
    background: var(--c-navy);
    color: rgba(255, 255, 255, 0.65);
    padding: 56px 0 0;
}

.footer__container {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 36px;
    padding-bottom: 40px;
}

.footer__brand .nav__logo {
    margin-bottom: 14px;
}

.footer__tagline {
    font-size: 0.88rem;
    max-width: 260px;
    color: rgba(255, 255, 255, 0.5);
}

.footer__links h4 {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--c-white);
    margin-bottom: 14px;
}

.footer__links a {
    display: block;
    font-size: 0.86rem;
    color: rgba(255, 255, 255, 0.55);
    margin-bottom: 8px;
    transition: var(--transition);
}

.footer__links a:hover {
    color: var(--c-blue-light);
}

.footer__bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.08);
    padding: 20px 0;
}

.footer__bottom .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.8rem;
    color: rgba(255, 255, 255, 0.4);
}

/* ---------- REVEAL ANIMATION ---------- */
[data-reveal] {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

[data-reveal].revealed {
    opacity: 1;
    transform: translateY(0);
}

/* ---------- RESPONSIVE ---------- */
@media (max-width: 968px) {
    .about__container,
    .contact__container {
        grid-template-columns: 1fr;
        gap: 36px;
    }

    .about__visual {
        max-width: 380px;
        margin: 0 auto;
    }

    .footer__container {
        grid-template-columns: 1fr 1fr;
    }
}

@media (max-width: 768px) {
    .nav__menu {
        position: fixed;
        top: 0;
        right: -100%;
        width: 260px;
        height: 100vh;
        background: var(--c-navy);
        flex-direction: column;
        justify-content: center;
        gap: 24px;
        padding: 40px;
        transition: right 0.4s ease;
        box-shadow: -8px 0 30px rgba(0, 0, 0, 0.2);
    }

    .nav__menu.active {
        right: 0;
    }

    .nav__burger {
        display: flex;
        z-index: 1001;
    }

    .section {
        padding: 56px 0;
    }

    .hero__stats {
        gap: 32px;
    }

    .hero__stat-num {
        font-size: 1.7rem;
    }

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

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

    .footer__bottom .container {
        flex-direction: column;
        gap: 6px;
        text-align: center;
    }

    .contact__form {
        padding: 24px 20px;
    }
}

@media (max-width: 480px) {
    .hero__actions {
        flex-direction: column;
    }

    .btn {
        width: 100%;
    }

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

    .about__visual-badge {
        right: 0;
        bottom: -10px;
    }
}