:root {
    --ink: #14171c;
    --ink-2: #20262f;
    --steel: #2b333e;
    --steel-line: #3a4452;
    --concrete: #eceef1;
    --concrete-2: #f5f6f8;
    --paper: #ffffff;
    --amber: #f4a300;
    --amber-deep: #d98e00;
    --slate: #5d6b7c;
    --line: #d8dce1;
    --txt: #1c2129;
    --txt-soft: #56606d;
    --txt-on-dark: #c7ced7;
    --r: 4px;
    --shell: 1180px;
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }

body {
    margin: 0;
    font-family: "IBM Plex Sans", system-ui, sans-serif;
    color: var(--txt);
    background: var(--paper);
    line-height: 1.6;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
}

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

a { color: inherit; }

h1, h2, h3 { font-family: "Archivo", system-ui, sans-serif; margin: 0; line-height: 1.05; }

.sd-shell {
    width: 100%;
    max-width: var(--shell);
    margin: 0 auto;
    padding: 0 20px;
}

/* Demo bar */
.sd-demobar {
    background: var(--ink);
    color: #e7eaee;
    font-family: "IBM Plex Mono", monospace;
    font-size: 11px;
    letter-spacing: 0.04em;
    display: flex;
    flex-wrap: wrap;
    gap: 6px 16px;
    align-items: center;
    justify-content: space-between;
    padding: 8px 20px;
}
.sd-demobar a { color: var(--amber); text-decoration: none; }
.sd-demobar a:hover { text-decoration: underline; }
.sd-demobar span { color: #8f99a6; }

/* Eyebrow */
.sd-eyebrow {
    font-family: "IBM Plex Mono", monospace;
    font-size: 12px;
    letter-spacing: 0.16em;
    text-transform: uppercase;
    color: var(--slate);
    margin: 0 0 14px;
}
.sd-eyebrow-light { color: var(--amber); }

/* Buttons */
.sd-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-family: "Archivo", sans-serif;
    font-weight: 700;
    font-size: 15px;
    letter-spacing: 0.01em;
    padding: 13px 22px;
    border-radius: var(--r);
    text-decoration: none;
    border: 1.5px solid transparent;
    transition: transform .15s ease, background .15s ease, color .15s ease, border-color .15s ease;
    cursor: pointer;
}
.sd-btn-amber { background: var(--amber); color: var(--ink); }
.sd-btn-amber:hover { background: var(--amber-deep); transform: translateY(-2px); }
.sd-btn-ghost { background: transparent; color: #fff; border-color: rgba(255,255,255,.5); }
.sd-btn-ghost:hover { border-color: #fff; transform: translateY(-2px); }

/* Header */
.sd-header {
    position: sticky;
    top: 0;
    z-index: 40;
    background: rgba(20,23,28,.92);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--steel-line);
}
.sd-header-inner {
    display: flex;
    align-items: center;
    gap: 16px;
    min-height: 64px;
}
.sd-brand {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    text-decoration: none;
    color: #fff;
    margin-right: auto;
}
.sd-brand-mark {
    width: 16px;
    height: 16px;
    background: var(--amber);
    transform: rotate(45deg);
    flex: 0 0 auto;
}
.sd-brand-word {
    font-family: "Archivo", sans-serif;
    font-weight: 800;
    letter-spacing: 0.18em;
    font-size: 19px;
    color: #fff;
}
.sd-nav { display: none; gap: 26px; }
.sd-nav a {
    color: var(--txt-on-dark);
    text-decoration: none;
    font-size: 14px;
    font-weight: 500;
    letter-spacing: 0.02em;
    transition: color .15s ease;
}
.sd-nav a:hover { color: #fff; }
.sd-header-cta { display: none; padding: 9px 16px; font-size: 13px; }

/* Hero */
.sd-hero {
    position: relative;
    color: #fff;
    isolation: isolate;
    display: flex;
    align-items: flex-end;
    min-height: 600px;
    padding: 120px 0 96px;
}
.sd-hero-img {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    z-index: -2;
}
.sd-hero-veil {
    position: absolute;
    inset: 0;
    z-index: -1;
    background:
        linear-gradient(180deg, rgba(20,23,28,.78) 0%, rgba(20,23,28,.55) 40%, rgba(20,23,28,.88) 100%),
        linear-gradient(90deg, rgba(20,23,28,.85) 0%, rgba(20,23,28,.2) 70%);
}
.sd-hero-inner { position: relative; }
.sd-hero-title {
    font-weight: 800;
    font-size: clamp(2.1rem, 7vw, 4.1rem);
    letter-spacing: -0.01em;
    margin-bottom: 22px;
    text-wrap: balance;
}
.sd-hero-lede {
    max-width: 540px;
    font-size: clamp(1rem, 2.4vw, 1.15rem);
    color: #e5e9ee;
    margin: 0 0 30px;
}
.sd-hero-actions { display: flex; flex-wrap: wrap; gap: 12px; }
.sd-hero-spec {
    position: absolute;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(20,23,28,.55);
    border-top: 1px solid var(--steel-line);
    backdrop-filter: blur(4px);
    display: flex;
    flex-wrap: wrap;
    gap: 6px 28px;
    justify-content: center;
    padding: 12px 20px;
    font-family: "IBM Plex Mono", monospace;
    font-size: 12px;
    letter-spacing: 0.08em;
    color: #cdd4dc;
}

/* Stats */
.sd-stats { background: var(--ink); color: #fff; }
.sd-stats-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1px;
    background: var(--steel-line);
    border-left: 0;
}
.sd-stat {
    background: var(--ink);
    padding: 30px 18px;
    text-align: center;
}
.sd-stat-num {
    display: block;
    font-family: "Archivo", sans-serif;
    font-weight: 800;
    font-size: clamp(1.9rem, 6vw, 2.7rem);
    letter-spacing: -0.01em;
    color: var(--amber);
}
.sd-stat-num small { font-size: .5em; color: #fff; font-weight: 600; }
.sd-stat-label {
    display: block;
    margin-top: 8px;
    font-size: 13px;
    letter-spacing: 0.03em;
    color: var(--txt-on-dark);
}

/* Sections */
.sd-section { padding: clamp(56px, 9vw, 104px) 0; }
.sd-section-soft { background: var(--concrete-2); }
.sd-head { max-width: 680px; margin-bottom: 44px; }
.sd-h2 {
    font-weight: 700;
    font-size: clamp(1.6rem, 4.4vw, 2.5rem);
    letter-spacing: -0.01em;
    color: var(--ink);
}
.sd-feature-dark .sd-h2 { color: #fff; }
.sd-intro { margin: 16px 0 0; font-size: 1.06rem; color: var(--txt-soft); }

/* Procédés */
.sd-proc-grid {
    list-style: none;
    margin: 0;
    padding: 0;
    display: grid;
    grid-template-columns: 1fr;
    gap: 14px;
}
.sd-proc {
    background: var(--paper);
    border: 1px solid var(--line);
    border-radius: var(--r);
    padding: 24px 22px;
    transition: transform .18s ease, box-shadow .18s ease, border-color .18s ease;
}
.sd-proc:hover {
    transform: translateY(-4px);
    box-shadow: 0 14px 30px rgba(20,23,28,.1);
    border-color: var(--amber);
}
.sd-proc-code {
    display: inline-block;
    font-family: "IBM Plex Mono", monospace;
    font-size: 12px;
    font-weight: 600;
    letter-spacing: 0.1em;
    color: var(--amber-deep);
    background: #fdf3dd;
    padding: 3px 9px;
    border-radius: 3px;
    margin-bottom: 14px;
}
.sd-proc h3 { font-size: 1.18rem; font-weight: 700; color: var(--ink); margin-bottom: 8px; }
.sd-proc p { margin: 0; color: var(--txt-soft); font-size: .96rem; }

/* Feature rows */
.sd-feature { padding: clamp(48px, 8vw, 96px) 0; }
.sd-feature-dark { background: var(--steel); color: var(--txt-on-dark); }
.sd-feature-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 30px;
    align-items: center;
}
.sd-feature-media {
    margin: 0;
    border-radius: var(--r);
    overflow: hidden;
    border: 1px solid var(--line);
}
.sd-feature-dark .sd-feature-media { border-color: var(--steel-line); }
.sd-feature-media img { width: 100%; aspect-ratio: 3 / 2; object-fit: cover; }
.sd-feature-text p { color: inherit; }
.sd-feature:not(.sd-feature-dark) .sd-feature-text p { color: var(--txt-soft); }
.sd-feature-text .sd-h2 { margin-bottom: 16px; }
.sd-ticks { list-style: none; margin: 22px 0 0; padding: 0; display: grid; gap: 12px; }
.sd-ticks li { position: relative; padding-left: 30px; font-size: .98rem; }
.sd-ticks li::before {
    content: "";
    position: absolute;
    left: 0;
    top: 4px;
    width: 16px;
    height: 16px;
    background: var(--amber);
    clip-path: polygon(14% 48%, 40% 74%, 88% 14%, 100% 28%, 40% 100%, 2% 60%);
}

/* Secteurs */
.sd-sect-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 16px;
}
.sd-sect {
    background: var(--paper);
    border: 1px solid var(--line);
    border-radius: var(--r);
    padding: 26px 24px;
}
.sd-sect-tag {
    font-family: "IBM Plex Mono", monospace;
    font-size: 13px;
    font-weight: 600;
    color: var(--slate);
}
.sd-sect h3 { font-size: 1.3rem; font-weight: 700; color: var(--ink); margin: 10px 0 8px; }
.sd-sect p { margin: 0; color: var(--txt-soft); }

/* Équipe */
.sd-team-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 22px;
}
.sd-member {
    margin: 0;
    background: var(--paper);
    border: 1px solid var(--line);
    border-radius: var(--r);
    overflow: hidden;
}
.sd-member img { width: 100%; aspect-ratio: 1 / 1; object-fit: cover; }
.sd-member figcaption { padding: 18px 20px; }
.sd-member-name { display: block; font-family: "Archivo", sans-serif; font-weight: 700; font-size: 1.12rem; color: var(--ink); }
.sd-member-role {
    display: block;
    margin-top: 4px;
    font-family: "IBM Plex Mono", monospace;
    font-size: 12px;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    color: var(--slate);
}

/* Contact */
.sd-contact { background: var(--ink); color: #fff; padding: clamp(56px, 9vw, 104px) 0; }
.sd-contact-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 40px;
}
.sd-contact-lead p { color: var(--txt-on-dark); margin: 16px 0 26px; max-width: 520px; }
.sd-contact-lead .sd-h2 { color: #fff; }
.sd-contact-info { list-style: none; margin: 0; padding: 0; display: grid; gap: 22px; }
.sd-contact-info li { border-top: 1px solid var(--steel-line); padding-top: 16px; }
.sd-info-label {
    display: block;
    font-family: "IBM Plex Mono", monospace;
    font-size: 11px;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    color: var(--slate);
    margin-bottom: 6px;
}
.sd-contact-info a { color: var(--amber); text-decoration: none; word-break: break-word; }
.sd-contact-info a:hover { text-decoration: underline; }
.sd-contact-info span { color: #e5e9ee; }

/* Footer */
.sd-footer { background: #0e1115; color: var(--txt-on-dark); padding: 56px 0 0; }
.sd-footer-inner {
    display: grid;
    grid-template-columns: 1fr;
    gap: 34px;
    padding-bottom: 40px;
}
.sd-footer-brand .sd-brand-word { display: block; margin-bottom: 12px; }
.sd-footer-brand p { margin: 0; font-size: .92rem; max-width: 360px; }
.sd-footer-cols { display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px; }
.sd-footer-cols p { margin: 0; font-size: .92rem; line-height: 1.7; }
.sd-footer-cols a { color: var(--amber); text-decoration: none; }
.sd-footer-cols a:hover { text-decoration: underline; }
.sd-footer-base {
    border-top: 1px solid var(--steel-line);
    padding: 18px 20px;
    display: flex;
    flex-wrap: wrap;
    gap: 6px 18px;
    justify-content: space-between;
    font-family: "IBM Plex Mono", monospace;
    font-size: 11px;
    letter-spacing: 0.05em;
    color: #6c7682;
    max-width: var(--shell);
    margin: 0 auto;
}

/* Focus */
a:focus-visible, .sd-btn:focus-visible {
    outline: 3px solid var(--amber);
    outline-offset: 3px;
    border-radius: 2px;
}

/* Small tablet */
@media (min-width: 620px) {
    .sd-shell { padding: 0 32px; }
    .sd-header-cta { display: inline-flex; }
    .sd-proc-grid { grid-template-columns: repeat(2, 1fr); }
    .sd-team-grid { grid-template-columns: repeat(2, 1fr); }
    .sd-footer-inner { grid-template-columns: 1.2fr 1fr; }
}

/* Tablet */
@media (min-width: 768px) {
    .sd-stats-grid { grid-template-columns: repeat(4, 1fr); }
    .sd-sect-grid { grid-template-columns: repeat(3, 1fr); }
    .sd-team-grid { grid-template-columns: repeat(3, 1fr); }
}

/* Desktop */
@media (min-width: 900px) {
    .sd-nav { display: flex; }
    .sd-stats-grid { grid-template-columns: repeat(4, 1fr); }
    .sd-hero { min-height: 660px; padding: 150px 0 110px; }
    .sd-proc-grid { grid-template-columns: repeat(3, 1fr); }
    .sd-feature-grid { grid-template-columns: 1fr 1fr; gap: 56px; }
    .sd-feature-reverse .sd-feature-media { order: 2; }
    .sd-contact-grid { grid-template-columns: 1.1fr .9fr; gap: 64px; align-items: start; }
    .sd-contact-info { grid-template-columns: repeat(2, 1fr); gap: 28px 40px; }
}

@media (prefers-reduced-motion: reduce) {
    * { scroll-behavior: auto !important; transition: none !important; }
}