/* =========================================================
   Escarpo — Feuille de style principale
   Site statique, sans dépendance externe (pas de CDN, pas de
   police tierce). Polices système, SVG inline pour les
   éléments graphiques.
   ========================================================= */

/* ---- Design tokens ------------------------------------- */
:root {
    /* Couleurs — palette "terroir" : papier chaud, vert profond, argile */
    --color-bg: #f7f4ee;
    --color-bg-alt: #efe8d8;
    --color-surface: #ffffff;
    --color-text: #2a251e;
    --color-text-soft: #5c5346;
    --color-text-muted: #8a8071;
    --color-green: #2f4a3c;
    --color-green-dark: #1e3129;
    --color-green-light: #4f6f5c;
    --color-clay: #a15c38;
    --color-clay-dark: #7e4527;
    --color-border: #ddd3ba;
    --color-border-strong: #c7b997;

    /* Typographie — piles de polices système, aucun fichier à charger */
    --font-serif: Georgia, 'Iowan Old Style', 'Palatino Linotype', Palatino, 'Book Antiqua', serif;
    --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;

    /* Échelle typographique fluide */
    --fs-sm: clamp(0.85rem, 0.82rem + 0.15vw, 0.95rem);
    --fs-base: clamp(1rem, 0.96rem + 0.2vw, 1.125rem);
    --fs-lg: clamp(1.15rem, 1.05rem + 0.4vw, 1.4rem);
    --fs-xl: clamp(1.5rem, 1.3rem + 0.8vw, 2rem);
    --fs-2xl: clamp(1.9rem, 1.5rem + 1.6vw, 2.75rem);
    --fs-3xl: clamp(2.3rem, 1.7rem + 2.6vw, 3.75rem);

    /* Espacements */
    --space-section: clamp(3.5rem, 3rem + 2vw, 6.5rem);
    --radius: 6px;
    --radius-lg: 14px;
    --container-w: 1140px;
    --shadow-soft: 0 1px 2px rgba(42, 37, 30, 0.06), 0 8px 24px -12px rgba(42, 37, 30, 0.12);
}

/* ---- Reset ------------------------------------------------ */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body, h1, h2, h3, h4, p, figure, blockquote, dl, dd, ul, ol { margin: 0; }
ul, ol { padding: 0; list-style: none; }
img, svg { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
button { font: inherit; color: inherit; background: none; border: none; cursor: pointer; }
input, textarea, select { font: inherit; color: inherit; }

body {
    font-family: var(--font-sans);
    font-size: var(--fs-base);
    line-height: 1.65;
    color: var(--color-text);
    background: var(--color-bg);
    -webkit-font-smoothing: antialiased;
}

@media (prefers-reduced-motion: reduce) {
    html { scroll-behavior: auto; }
    *, *::before, *::after { animation-duration: 0.01ms !important; transition-duration: 0.01ms !important; }
}

h1, h2, h3, h4 {
    font-family: var(--font-serif);
    font-weight: 700;
    line-height: 1.2;
    color: var(--color-green-dark);
    text-wrap: balance;
}
h1 { font-size: var(--fs-3xl); }
h2 { font-size: var(--fs-2xl); }
h3 { font-size: var(--fs-xl); }
h4 { font-size: var(--fs-lg); font-family: var(--font-sans); font-weight: 700; }

p { color: var(--color-text-soft); }
p + p { margin-top: 1em; }

.lede {
    font-size: var(--fs-lg);
    color: var(--color-text-soft);
    max-width: 46em;
}

/* ---- Layout utilities -------------------------------------- */
.container {
    width: 100%;
    max-width: var(--container-w);
    margin-inline: auto;
    padding-inline: clamp(1.25rem, 4vw, 2.5rem);
}
.section { padding-block: var(--space-section); }
.section-alt { background: var(--color-bg-alt); }
.section-dark {
    background: var(--color-green-dark);
    color: #e7e2d3;
}
.section-dark h2, .section-dark h3 { color: #f4f0e4; }
.section-dark p { color: #cfc8b3; }

.section-head {
    max-width: 42em;
    margin-bottom: clamp(2rem, 1.5rem + 2vw, 3.5rem);
}
.section-head.center { margin-inline: auto; text-align: center; }

.eyebrow {
    display: inline-flex;
    align-items: center;
    gap: 0.5em;
    font-size: var(--fs-sm);
    font-weight: 700;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--color-clay-dark);
    margin-bottom: 0.9em;
}
.eyebrow::before {
    content: "";
    width: 1.4em;
    height: 2px;
    background: var(--color-clay);
    display: inline-block;
}

.grid {
    display: grid;
    gap: clamp(1.25rem, 1rem + 1vw, 2rem);
}
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }
@media (max-width: 900px) {
    .grid-3, .grid-4 { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 640px) {
    .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
}

/* ---- Buttons ------------------------------------------------ */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.6em;
    padding: 0.85em 1.6em;
    border-radius: var(--radius);
    font-weight: 700;
    font-size: var(--fs-sm);
    letter-spacing: 0.02em;
    border: 1.5px solid transparent;
    transition: transform 0.15s ease, background-color 0.15s ease, border-color 0.15s ease, color 0.15s ease;
    white-space: nowrap;
}
.btn-primary {
    background: var(--color-green);
    color: #fff;
}
.btn-primary:hover { background: var(--color-green-dark); }
.btn-secondary {
    background: transparent;
    color: var(--color-green-dark);
    border-color: var(--color-border-strong);
}
.btn-secondary:hover { border-color: var(--color-green); background: var(--color-surface); }
.section-dark .btn-secondary { color: #f4f0e4; border-color: #4f6f5c; }
.section-dark .btn-secondary:hover { background: rgba(255,255,255,0.06); }
.btn-row { display: flex; flex-wrap: wrap; gap: 0.9rem; align-items: center; }

/* ---- Header / Nav -------------------------------------------- */
.site-header {
    position: sticky;
    top: 0;
    z-index: 100;
    /* Fond opaque plutôt qu'un flou (backdrop-filter) : un filtre sur cet
       élément créerait un "containing block" qui casserait le
       positionnement fixe du panneau de menu mobile qu'il contient. */
    background: var(--color-bg);
    border-bottom: 1px solid var(--color-border);
}
.site-header .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding-block: 1rem;
}
.brand {
    display: flex;
    align-items: center;
    gap: 0.6em;
    font-family: var(--font-serif);
    font-weight: 700;
    font-size: 1.35rem;
    color: var(--color-green-dark);
}
.brand-mark { color: var(--color-clay); flex-shrink: 0; }

.nav-toggle {
    display: none;
    flex-direction: column;
    justify-content: center;
    gap: 5px;
    width: 42px;
    height: 42px;
    border: 1px solid var(--color-border-strong);
    border-radius: var(--radius);
}
.nav-toggle span {
    display: block;
    width: 20px;
    height: 2px;
    margin-inline: auto;
    background: var(--color-green-dark);
    transition: transform 0.2s ease, opacity 0.2s ease;
}
.nav-toggle[aria-expanded="true"] span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

.main-nav ul {
    display: flex;
    align-items: center;
    gap: clamp(0.9rem, 1vw, 1.9rem);
    font-size: var(--fs-sm);
    font-weight: 600;
}
.main-nav a:not(.btn) {
    color: var(--color-text-soft);
    padding: 0.4em 0.1em;
    border-bottom: 2px solid transparent;
    transition: color 0.15s ease, border-color 0.15s ease;
}
.main-nav a:not(.btn):hover, .main-nav a:not(.btn)[aria-current="page"] {
    color: var(--color-green-dark);
    border-color: var(--color-clay);
}
.main-nav .btn { margin-left: 0.4rem; }

@media (max-width: 860px) {
    .nav-toggle { display: flex; }
    .main-nav {
        position: fixed;
        inset: 65px 0 0 0;
        background: var(--color-bg);
        transform: translateY(-8px);
        opacity: 0;
        visibility: hidden;
        transition: opacity 0.2s ease, transform 0.2s ease, visibility 0.2s;
        overflow-y: auto;
        padding: 1.5rem 0 3rem;
    }
    .main-nav.is-open {
        opacity: 1;
        visibility: visible;
        transform: translateY(0);
    }
    .main-nav ul {
        flex-direction: column;
        align-items: stretch;
        gap: 0;
    }
    .main-nav li { border-bottom: 1px solid var(--color-border); }
    .main-nav a {
        display: block;
        padding: 1.1rem clamp(1.25rem, 4vw, 2.5rem);
        border-bottom: none;
        font-size: var(--fs-base);
    }
    .main-nav .btn { margin: 1.25rem clamp(1.25rem, 4vw, 2.5rem) 0; justify-content: center; }
}

/* ---- Hero ------------------------------------------------- */
.hero {
    position: relative;
    overflow: hidden;
    padding-block: clamp(3.5rem, 3rem + 3vw, 7rem);
    background: linear-gradient(180deg, var(--color-bg) 0%, var(--color-bg-alt) 100%);
    border-bottom: 1px solid var(--color-border);
}
.hero-contours {
    position: absolute;
    inset: 0;
    z-index: 0;
    opacity: 0.5;
    pointer-events: none;
}
.hero .container { position: relative; z-index: 1; }
.hero-inner { max-width: 40em; }
.hero-small { padding-block: clamp(2.75rem, 2.4rem + 2vw, 4.5rem); }
.hero-small h1 { font-size: var(--fs-2xl); }

/* ---- Cards --------------------------------------------------- */
.card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: clamp(1.5rem, 1.3rem + 1vw, 2.1rem);
}
.card-number {
    font-family: var(--font-serif);
    font-size: 1.5rem;
    color: var(--color-clay);
    margin-bottom: 0.6em;
}
.card h3, .card h4 { margin-bottom: 0.5em; }
.card p { font-size: var(--fs-sm); }

.feature-chip {
    display: flex;
    gap: 1rem;
    align-items: flex-start;
    padding: 1.1rem 1.2rem;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
}
.feature-chip .icon {
    flex-shrink: 0;
    width: 2.4em;
    height: 2.4em;
    display: grid;
    place-items: center;
    background: var(--color-green-dark);
    color: #f4f0e4;
    border-radius: 50%;
}
.feature-chip h4 { font-size: var(--fs-base); margin-bottom: 0.2em; }
.feature-chip p { font-size: var(--fs-sm); margin: 0; }

/* ---- Steps / timeline ------------------------------------- */
.steps { counter-reset: step; display: flex; flex-direction: column; gap: 1.75rem; }
.step {
    counter-increment: step;
    display: grid;
    grid-template-columns: auto 1fr;
    gap: 1.25rem;
    padding-bottom: 1.75rem;
    border-bottom: 1px solid var(--color-border);
}
.step:last-child { border-bottom: none; padding-bottom: 0; }
.step::before {
    content: counter(step, decimal-leading-zero);
    font-family: var(--font-serif);
    font-size: 1.4rem;
    color: var(--color-clay);
    line-height: 1;
}

/* ---- Quote --------------------------------------------------- */
.pull-quote {
    font-family: var(--font-serif);
    font-size: var(--fs-xl);
    line-height: 1.45;
    color: var(--color-green-dark);
    border-left: 3px solid var(--color-clay);
    padding-left: 1.25em;
    max-width: 34em;
}
.pull-quote cite {
    display: block;
    margin-top: 0.75em;
    font-family: var(--font-sans);
    font-style: normal;
    font-size: var(--fs-sm);
    font-weight: 700;
    color: var(--color-text-muted);
}

/* ---- FAQ (details/summary natif) ------------------------------ */
.faq-list { display: flex; flex-direction: column; gap: 0.75rem; max-width: 48em; }
.faq-item {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    padding: 0.25rem 1.25rem;
}
.faq-item summary {
    cursor: pointer;
    list-style: none;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    padding: 1.1rem 0;
    font-weight: 700;
    color: var(--color-green-dark);
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after {
    content: "+";
    font-family: var(--font-serif);
    font-size: 1.4rem;
    color: var(--color-clay);
    flex-shrink: 0;
    transition: transform 0.2s ease;
}
.faq-item[open] summary::after { transform: rotate(45deg); }
.faq-item p { padding-bottom: 1.1rem; font-size: var(--fs-sm); }

/* ---- Forms --------------------------------------------------- */
.form-grid { display: grid; gap: 1.1rem; }
.form-field { display: flex; flex-direction: column; gap: 0.4rem; }
.form-field label { font-size: var(--fs-sm); font-weight: 700; color: var(--color-green-dark); }
.form-field .hint { font-size: 0.8rem; color: var(--color-text-muted); font-weight: 400; }
.form-field input, .form-field select, .form-field textarea {
    padding: 0.75em 0.9em;
    border: 1.5px solid var(--color-border-strong);
    border-radius: var(--radius);
    background: var(--color-surface);
    font-size: var(--fs-base);
}
.form-field input:focus, .form-field select:focus, .form-field textarea:focus {
    outline: 2px solid var(--color-green-light);
    outline-offset: 1px;
    border-color: var(--color-green);
}
.form-row-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 1.1rem; }
@media (max-width: 560px) { .form-row-2 { grid-template-columns: 1fr; } }
.form-note { font-size: var(--fs-sm); color: var(--color-text-muted); margin-top: 1rem; }

/* ---- Contact info list ----------------------------------------- */
.contact-list { display: flex; flex-direction: column; gap: 1.5rem; }
.contact-list dt { font-size: var(--fs-sm); font-weight: 700; text-transform: uppercase; letter-spacing: 0.04em; color: var(--color-clay-dark); }
.contact-list dd { margin: 0.3em 0 0; font-size: var(--fs-lg); font-family: var(--font-serif); color: var(--color-green-dark); }

/* ---- CTA banner ------------------------------------------------ */
.cta-banner {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    gap: 1.5rem;
    background: var(--color-green-dark);
    color: #f4f0e4;
    border-radius: var(--radius-lg);
    padding: clamp(1.75rem, 1.4rem + 1.5vw, 2.75rem);
}
.cta-banner h3 { color: #f4f0e4; margin-bottom: 0.3em; }
.cta-banner p { color: #cfc8b3; margin: 0; }

/* ---- Footer ------------------------------------------------- */
.site-footer {
    background: var(--color-green-dark);
    color: #cfc8b3;
    padding-block: clamp(3rem, 2.5rem + 2vw, 4.5rem) 2rem;
}
.footer-grid {
    display: grid;
    grid-template-columns: 1.4fr 1fr 1fr;
    gap: 2.5rem;
    padding-bottom: 2.5rem;
    border-bottom: 1px solid rgba(255,255,255,0.12);
}
@media (max-width: 700px) {
    .footer-grid { grid-template-columns: 1fr; gap: 2rem; }
}
.footer-grid h4 { color: #f4f0e4; font-size: var(--fs-sm); text-transform: uppercase; letter-spacing: 0.06em; margin-bottom: 1em; }
.footer-brand .brand { color: #f4f0e4; margin-bottom: 0.9em; }
.footer-brand p { color: #a99f88; font-size: var(--fs-sm); max-width: 26em; }
.footer-nav ul, .footer-legal ul { display: flex; flex-direction: column; gap: 0.6em; }
.footer-nav a, .footer-legal a { font-size: var(--fs-sm); color: #cfc8b3; }
.footer-nav a:hover, .footer-legal a:hover { color: #f4f0e4; }
.footer-bottom {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    gap: 1rem;
    padding-top: 1.5rem;
    font-size: 0.8rem;
    color: #8a8071;
}

/* ---- Misc utilities --------------------------------------------- */
.text-center { text-align: center; }
.mt-lg { margin-top: var(--space-section); }
.visually-hidden {
    position: absolute;
    width: 1px; height: 1px;
    padding: 0; margin: -1px;
    overflow: hidden;
    clip: rect(0,0,0,0);
    white-space: nowrap;
    border: 0;
}
.skip-link {
    position: absolute;
    left: 1rem; top: -6rem;
    background: var(--color-green-dark);
    color: #fff;
    padding: 0.75em 1.2em;
    border-radius: var(--radius);
    white-space: nowrap;
    z-index: 200;
    transition: top 0.2s ease;
}
.skip-link:focus { top: 1rem; }