/* ── VARIABLES ── */
:root {
    --color-black:      #0a0a0a;
    --color-dark:       #111111;
    --color-dark-alt:   #1a1a1a;
    --color-border:     #2a2a2a;
    --color-muted:      #555555;
    --color-text:       #cccccc;
    --color-light:      #eeeeee;
    --color-white:      #ffffff;
    --color-accent:     #e8e0d0;

    --font-sans:   'Inter', system-ui, -apple-system, sans-serif;
    --font-serif:  'Playfair Display', Georgia, serif;

    --text-xs:   0.75rem;
    --text-sm:   0.875rem;
    --text-base: 1rem;
    --text-lg:   1.125rem;
    --text-xl:   1.25rem;
    --text-2xl:  1.5rem;
    --text-3xl:  2rem;
    --text-4xl:  2.75rem;
    --text-5xl:  3.75rem;
    --text-6xl:  5rem;

    --space-1:  0.25rem;
    --space-2:  0.5rem;
    --space-3:  0.75rem;
    --space-4:  1rem;
    --space-6:  1.5rem;
    --space-8:  2rem;
    --space-12: 3rem;
    --space-16: 4rem;
    --space-24: 6rem;
    --space-32: 8rem;

    --container-max: 1280px;
    --container-narrow: 860px;
    --nav-height: 70px;

    --ease:         cubic-bezier(0.25, 0.1, 0.25, 1);
    --ease-in-out:  cubic-bezier(0.4, 0, 0.2, 1);
    --duration-fast: 150ms;
    --duration-base: 250ms;
    --duration-slow: 400ms;
}

/* ── RESET ── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { font-size: 16px; scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body { background-color: var(--color-dark); color: var(--color-text); font-family: var(--font-sans); line-height: 1.6; min-height: 100vh; overflow-x: hidden; }
img, video { display: block; max-width: 100%; height: auto; }
a { color: inherit; text-decoration: none; }
ul, ol { list-style: none; }
button, input, textarea, select { font: inherit; color: inherit; }
button { cursor: pointer; background: none; border: none; }

/* ── TYPOGRAPHY ── */
h1, h2, h3, h4, h5, h6 { font-family: var(--font-serif); font-weight: 400; line-height: 1.15; color: var(--color-light); letter-spacing: -0.01em; }
h1 { font-size: clamp(var(--text-4xl), 6vw, var(--text-6xl)); }
h2 { font-size: clamp(var(--text-3xl), 4vw, var(--text-5xl)); }
h3 { font-size: clamp(var(--text-2xl), 3vw, var(--text-3xl)); }
h4 { font-size: var(--text-xl); }
p { max-width: 68ch; line-height: 1.75; }

.label { font-size: var(--text-xs); letter-spacing: 0.12em; text-transform: uppercase; color: var(--color-muted); font-weight: 500; }

.container { width: 100%; max-width: var(--container-max); margin-inline: auto; padding-inline: var(--space-6); }
.container--narrow { max-width: var(--container-narrow); }
@media (min-width: 768px) { .container { padding-inline: var(--space-12); } }

/* ── NAV ── */
.nav { position: fixed; top: 0; left: 0; right: 0; height: var(--nav-height); z-index: 100; display: flex; align-items: center; padding-inline: var(--space-6); transition: background-color var(--duration-slow) var(--ease); }
.nav--scrolled { background-color: rgba(10,10,10,0.92); backdrop-filter: blur(12px); border-bottom: 1px solid var(--color-border); }
.nav__inner { display: flex; align-items: center; justify-content: space-between; width: 100%; max-width: var(--container-max); margin-inline: auto; }
.nav__logo { font-family: var(--font-serif); font-size: var(--text-lg); color: var(--color-light); letter-spacing: 0.02em; }
.nav__logo span { color: var(--color-muted); font-size: var(--text-xs); font-family: var(--font-sans); display: block; letter-spacing: 0.08em; text-transform: uppercase; }
.nav__links { display: flex; gap: var(--space-8); align-items: center; }
.nav__link { font-size: var(--text-sm); letter-spacing: 0.06em; text-transform: uppercase; color: var(--color-muted); transition: color var(--duration-fast) var(--ease); position: relative; }
.nav__link::after { content: ''; position: absolute; bottom: -4px; left: 0; width: 0; height: 1px; background: var(--color-accent); transition: width var(--duration-base) var(--ease); }
.nav__link:hover, .nav__link--active { color: var(--color-light); }
.nav__link:hover::after, .nav__link--active::after { width: 100%; }
.nav__lang { display: flex; gap: var(--space-3); margin-left: var(--space-8); padding-left: var(--space-8); border-left: 1px solid var(--color-border); }
.nav__lang a { font-size: var(--text-xs); letter-spacing: 0.1em; text-transform: uppercase; color: var(--color-muted); transition: color var(--duration-fast) var(--ease); }
.nav__lang a.active, .nav__lang a:hover { color: var(--color-light); }
.nav__burger { display: none; flex-direction: column; justify-content: center; gap: 5px; width: 32px; height: 32px; z-index: 102; position: relative; flex-shrink: 0; }
.nav__burger span { display: block; width: 24px; height: 2px; background: var(--color-light); transition: transform var(--duration-base) var(--ease), opacity var(--duration-base) var(--ease); transform-origin: center; }
@media (max-width: 767px) {
    .nav__burger { display: flex; }
    .nav__links { position: fixed; inset: 0; background: var(--color-black); flex-direction: column; align-items: center; justify-content: center; gap: var(--space-8); opacity: 0; pointer-events: none; transition: opacity var(--duration-slow) var(--ease); z-index: 101; display: flex; }
    .nav--open .nav__links { opacity: 1; pointer-events: auto; }
    .nav--open .nav__burger span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
    .nav--open .nav__burger span:nth-child(2) { opacity: 0; transform: scaleX(0); }
    .nav--open .nav__burger span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }
    .nav__links .nav__link { font-size: var(--text-2xl); letter-spacing: 0.04em; }
    .nav__lang { margin-left: 0; padding-left: 0; border-left: none; gap: var(--space-6); }
    .nav__lang a { font-size: var(--text-sm); }
}

/* ── FOOTER ── */
.footer { padding-block: var(--space-16) var(--space-12); border-top: 1px solid var(--color-border); margin-top: var(--space-32); }
.footer__inner { display: flex; flex-direction: column; gap: var(--space-6); align-items: center; text-align: center; }
@media (min-width: 768px) { .footer__inner { flex-direction: row; justify-content: space-between; text-align: left; } }
.footer__name { font-family: var(--font-serif); font-size: var(--text-lg); color: var(--color-light); }
.footer__meta { font-size: var(--text-sm); color: var(--color-muted); }
.footer__links { display: flex; gap: var(--space-6); }
.footer__links a { font-size: var(--text-sm); color: var(--color-muted); letter-spacing: 0.04em; transition: color var(--duration-fast) var(--ease); }
.footer__links a:hover { color: var(--color-light); }

/* ── BUTTONS ── */
.btn { display: inline-flex; align-items: center; gap: var(--space-3); padding: var(--space-3) var(--space-8); font-size: var(--text-sm); letter-spacing: 0.08em; text-transform: uppercase; border: 1px solid currentColor; transition: background-color var(--duration-base) var(--ease), color var(--duration-base) var(--ease); cursor: pointer; }
.btn--light { color: var(--color-light); border-color: var(--color-light); }
.btn--light:hover { background-color: var(--color-light); color: var(--color-dark); }
.btn--ghost { color: var(--color-muted); border-color: var(--color-border); }
.btn--ghost:hover { color: var(--color-light); border-color: var(--color-muted); }

/* ── PROJECT CARDS ── */
.project-card { position: relative; display: block; overflow: hidden; aspect-ratio: 4/3; background-color: var(--color-dark-alt); }
.project-card__img { width: 100%; height: 100%; object-fit: cover; transition: transform var(--duration-slow) var(--ease-in-out), opacity var(--duration-slow) var(--ease); }
.project-card:hover .project-card__img { transform: scale(1.04); opacity: 0.7; }
.project-card__overlay { position: absolute; inset: 0; display: flex; flex-direction: column; justify-content: flex-end; padding: var(--space-6); background: linear-gradient(to top, rgba(0,0,0,0.75) 0%, transparent 60%); opacity: 0; transition: opacity var(--duration-base) var(--ease); }
.project-card:hover .project-card__overlay { opacity: 1; }
.project-card__category { font-size: var(--text-xs); letter-spacing: 0.1em; text-transform: uppercase; color: var(--color-accent); margin-bottom: var(--space-2); }
.project-card__title { font-family: var(--font-serif); font-size: var(--text-xl); color: var(--color-white); font-weight: 400; }

/* ── HERO ── */
.hero { min-height: 100svh; display: flex; flex-direction: column; justify-content: flex-end; padding-bottom: var(--space-24); padding-inline: var(--space-6); position: relative; overflow: hidden; }
.hero__bg { position: absolute; inset: 0; background-color: var(--color-black); overflow: hidden; }
.hero__bg img, .hero__bg video { position: absolute; inset: 0; width: 100%; height: 100%; }
.hero__bg-blur { object-fit: cover; object-position: center; filter: blur(40px) brightness(0.55); transform: scale(1.15); opacity: 0.65; }
.hero__bg-main { object-fit: contain; object-position: center bottom; opacity: 0.85; transform: scale(1.3); transform-origin: center bottom; }
.hero__content { position: relative; z-index: 1; max-width: var(--container-max); margin-inline: auto; width: 100%; }
.hero__label { margin-bottom: var(--space-4); }
.hero__title { color: var(--color-white); margin-bottom: var(--space-6); }
.hero__subtitle { font-size: var(--text-lg); color: var(--color-text); margin-bottom: var(--space-12); max-width: 48ch; }
.hero__scroll { position: absolute; bottom: var(--space-8); left: 50%; transform: translateX(-50%); display: flex; flex-direction: column; align-items: center; gap: var(--space-2); color: var(--color-muted); font-size: var(--text-xs); letter-spacing: 0.1em; text-transform: uppercase; z-index: 1; }
.hero__scroll-line { width: 1px; height: 40px; background: linear-gradient(to bottom, var(--color-muted), transparent); animation: scrollLine 1.8s ease-in-out infinite; }
@keyframes scrollLine { 0% { transform: scaleY(0); transform-origin: top; } 50% { transform: scaleY(1); transform-origin: top; } 51% { transform: scaleY(1); transform-origin: bottom; } 100% { transform: scaleY(0); transform-origin: bottom; } }

/* ── SECTIONS / GRILLE ── */
.section { padding-block: var(--space-24); }
.section__header { display: flex; align-items: baseline; justify-content: space-between; flex-wrap: wrap; margin-bottom: var(--space-12); gap: var(--space-4); }
.projects-grid { display: grid; grid-template-columns: repeat(1, 1fr); gap: var(--space-4); }
@media (min-width: 640px) { .projects-grid { grid-template-columns: repeat(2, 1fr); } }
@media (min-width: 1024px) { .projects-grid { grid-template-columns: repeat(3, 1fr); } }
.projects-grid--featured { grid-template-columns: 1fr; }
@media (min-width: 768px) { .projects-grid--featured { grid-template-columns: repeat(2, 1fr); } .projects-grid--featured .project-card:first-child { grid-column: span 2; aspect-ratio: 16/7; } }

/* ── FILTRES ── */
.filter-bar { display: flex; gap: var(--space-4); flex-wrap: wrap; margin-bottom: var(--space-12); }
.filter-bar__btn { font-size: var(--text-xs); letter-spacing: 0.1em; text-transform: uppercase; color: var(--color-muted); padding: var(--space-2) var(--space-4); border: 1px solid transparent; transition: all var(--duration-fast) var(--ease); }
.filter-bar__btn:hover, .filter-bar__btn--active { color: var(--color-light); border-color: var(--color-border); }

/* ── SERVICES ── */
.services-grid { display: grid; gap: var(--space-4); grid-template-columns: 1fr; }
@media (min-width: 640px) { .services-grid { grid-template-columns: repeat(2, 1fr); } }
@media (min-width: 1024px) { .services-grid { grid-template-columns: repeat(3, 1fr); } }
.service-card { border: 1px solid var(--color-border); padding: var(--space-8); display: flex; flex-direction: column; gap: var(--space-4); transition: border-color var(--duration-base) var(--ease); }
.service-card:hover { border-color: var(--color-muted); }
.service-card__header { display: flex; flex-direction: column; gap: var(--space-4); }
.service-card__prices { display: flex; gap: var(--space-6); flex-wrap: wrap; align-items: flex-end; }
.service-price { display: flex; flex-direction: column; }
.service-price__amount { font-family: var(--font-serif); font-size: var(--text-2xl); color: var(--color-light); line-height: 1.1; }
.service-price--featured .service-price__amount { color: var(--color-accent); }
.service-price__label { font-size: var(--text-xs); letter-spacing: 0.08em; text-transform: uppercase; color: var(--color-muted); margin-top: var(--space-1); }
.service-card__desc { color: var(--color-text); font-size: var(--text-sm); line-height: 1.75; flex-grow: 1; }
.service-card__includes { display: flex; flex-direction: column; gap: var(--space-2); padding-top: var(--space-4); border-top: 1px solid var(--color-border); margin-top: auto; }
.service-card__includes li { font-size: var(--text-xs); color: var(--color-muted); padding-left: var(--space-4); position: relative; }
.service-card__includes li::before { content: '—'; position: absolute; left: 0; color: var(--color-border); }
.options-grid { display: grid; grid-template-columns: 1fr; }
@media (min-width: 768px) { .options-grid { grid-template-columns: repeat(2, 1fr); column-gap: var(--space-16); } }
.option-item { display: flex; flex-direction: column; gap: var(--space-1); padding: var(--space-5) 0; border-bottom: 1px solid var(--color-border); }
.option-item__row { display: flex; justify-content: space-between; align-items: baseline; gap: var(--space-4); }
.option-item__name { font-size: var(--text-sm); color: var(--color-light); }
.option-item__price { font-family: var(--font-serif); font-size: var(--text-base); color: var(--color-accent); white-space: nowrap; }
.option-item__desc { font-size: var(--text-xs); color: var(--color-muted); }

/* ── CONTACT ── */
.contact-section { padding-block: var(--space-32); }
.contact-grid { display: grid; gap: var(--space-16); }
@media (min-width: 768px) { .contact-grid { grid-template-columns: 1fr 1fr; align-items: start; } }
.contact-intro h2 { margin-bottom: var(--space-6); }
.contact-intro p { color: var(--color-text); margin-bottom: var(--space-4); }
.contact-form { display: flex; flex-direction: column; gap: var(--space-6); }
.form-group { display: flex; flex-direction: column; gap: var(--space-2); }
.form-group label { font-size: var(--text-xs); letter-spacing: 0.1em; text-transform: uppercase; color: var(--color-muted); }
.form-group input, .form-group textarea { background: transparent; border: none; border-bottom: 1px solid var(--color-border); padding: var(--space-3) 0; color: var(--color-light); font-size: var(--text-base); transition: border-color var(--duration-fast) var(--ease); outline: none; }
.form-group input:focus, .form-group textarea:focus { border-bottom-color: var(--color-accent); }
.form-group textarea { resize: vertical; min-height: 120px; }
.form-success { padding: var(--space-4); border: 1px solid var(--color-border); color: var(--color-accent); font-size: var(--text-sm); }

/* ── SCROLL TRACE ── */
.scroll-trace { position: fixed; top: var(--nav-height); width: 60px; height: calc(100vh - var(--nav-height)); pointer-events: none; z-index: 50; overflow: visible; color: var(--color-light); }
.scroll-trace--right { right: 24px; }
.scroll-trace--left { left: 24px; transform: scaleX(-1); }
.scroll-trace__path { fill: none; stroke: currentColor; stroke-linecap: round; stroke-dasharray: var(--scroll-trace-length, 0); stroke-dashoffset: calc(var(--scroll-trace-length, 0) * (1 - var(--scroll-trace-progress, 0))); opacity: 0.35; vector-effect: non-scaling-stroke; transition: stroke-dashoffset 120ms linear; }
@media (max-width: 767px) { .scroll-trace { display: none; } }

/* ── SCROLL TO TOP ── */
.scroll-top { position: fixed; bottom: 24px; right: 24px; width: 44px; height: 44px; border-radius: 50%; border: 1px solid var(--color-border); background: rgba(10, 10, 10, 0.7); backdrop-filter: blur(8px); -webkit-backdrop-filter: blur(8px); color: var(--color-text); display: flex; align-items: center; justify-content: center; cursor: pointer; opacity: 0; pointer-events: none; transform: translateY(8px); transition: opacity var(--duration-base) var(--ease), transform var(--duration-base) var(--ease), border-color var(--duration-base) var(--ease), color var(--duration-base) var(--ease); z-index: 90; padding: 0; }
.scroll-top--visible { opacity: 1; pointer-events: auto; transform: translateY(0); }
.scroll-top:hover { border-color: var(--color-light); color: var(--color-light); }
.scroll-top svg { width: 16px; height: 16px; display: block; }
@media (max-width: 767px) { .scroll-top { width: 40px; height: 40px; bottom: 16px; right: 16px; } }

/* ── RESPONSIVE MOBILE ── */
@media (max-width: 639px) {
    .section { padding-block: var(--space-16); }
    .section__header { margin-bottom: var(--space-8); }
    .footer { margin-top: var(--space-16); padding-block: var(--space-12) var(--space-8); }
    .hero { padding-bottom: var(--space-16); }
    .hero__subtitle { font-size: var(--text-base); margin-bottom: var(--space-8); }
    .contact-section { padding-block: var(--space-16); }
    .contact-grid { gap: var(--space-8); }
    .services-grid { gap: var(--space-3); }
}