/* ============================================
   Groupe Pylône — CSS commun
   Sert principalement les pages qui n'embarquent
   pas leur propre style inline (ex: bornes-VE).
   Les pages index/telecom/photovoltaique gardent
   leur CSS inline complet en plus.
   ============================================ */

:root {
    --brand-blue-900: #0B2A4A;
    --brand-blue-800: #143E6E;
    --brand-blue-700: #1F5B9C;
    --brand-blue-500: #2ea3f2;
    --brand-blue-300: #7AB2E0;
    --brand-green-700: #08a37d;
    --brand-green-500: #0acfa0;
    --brand-green-400: #3fdfb5;
    --night: #0a1828;
    --paper: #f8fafc;
    --ink: #0f172a;
    --muted: #64748b;
    --bg: #ffffff;
    --fg: #0f172a;

    --r-pill: 999px;
    --d-fast: 180ms;
    --d-base: 280ms;
    --d-slow: 600ms;
    --ease-out: cubic-bezier(0.22, 1, 0.36, 1);
    --ease-spring: cubic-bezier(0.34, 1.56, 0.64, 1);
    --ease-inout: cubic-bezier(0.65, 0, 0.35, 1);

    --font-body: 'Inter', sans-serif;
    --font-display: 'Plus Jakarta Sans', sans-serif;
    --font-mono: 'JetBrains Mono', monospace;
    --glow-green: 0 8px 32px rgba(10, 207, 160, .42);
    --glow-blue: 0 8px 32px rgba(46, 163, 242, .42);
}

* { box-sizing: border-box; }
body {
    margin: 0;
    font-family: var(--font-body);
    font-size: 16px;
    line-height: 1.6;
    color: var(--fg);
    background: var(--bg);
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
}
a { text-decoration: none; color: inherit; }

/* ===== NAV (utilisée par TOUTES les pages via includes/nav.php) ===== */
.nav {
    position: fixed;
    top: 0; left: 0; right: 0;
    z-index: 100;
    padding: 18px clamp(16px, 4vw, 48px);
    transition: all var(--d-base) var(--ease-out);
}
.nav.scrolled {
    background: rgba(11, 42, 74, 0.92);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    padding: 10px clamp(16px, 4vw, 48px);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.18);
}
.nav-inner {
    max-width: 1280px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 24px;
}
.brand { display: inline-flex; align-items: center; }
.brand img {
    height: 30px;
    width: auto;
    transition: height var(--d-base) var(--ease-out);
    display: block;
}
.nav.scrolled .brand img { height: 22px; }
.nav-links {
    display: flex;
    gap: 28px;
    align-items: center;
}
.nav-links a {
    font-size: 14px;
    font-weight: 600;
    color: white;
    transition: color var(--d-fast) var(--ease-out);
    position: relative;
    font-family: var(--font-display);
}
.nav-links a:hover,
.nav-links a.is-active { color: var(--brand-green-400); }
.nav-links a::after {
    content: "";
    position: absolute;
    bottom: -4px; left: 0; right: 0;
    height: 2px;
    background: var(--brand-green-500);
    transform: scaleX(0);
    transform-origin: right;
    transition: transform var(--d-base) var(--ease-out);
}
.nav-links a:hover::after,
.nav-links a.is-active::after { transform: scaleX(1); transform-origin: left; }
.nav-links a.btn::after { display: none; }

/* ===== BOUTONS ===== */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 14px 28px;
    border-radius: var(--r-pill);
    font-family: var(--font-body);
    font-weight: 600;
    font-size: 15px;
    transition: all var(--d-base) var(--ease-out);
    position: relative;
    overflow: hidden;
    white-space: nowrap;
    cursor: pointer;
    border: 0;
}
.btn-primary {
    background: var(--brand-green-500);
    color: white;
    box-shadow: 0 4px 20px rgba(10, 207, 160, 0.3);
}
.btn-primary:hover {
    transform: translateY(-2px);
    background: var(--brand-green-700);
    box-shadow: var(--glow-green);
}
.btn-primary::after {
    content: "→";
    transition: transform var(--d-base) var(--ease-out);
}
.btn-blue {
    background: var(--brand-blue-700);
    color: white;
    box-shadow: 0 4px 20px rgba(31, 91, 156, 0.3);
}
.btn-blue:hover {
    transform: translateY(-2px);
    background: var(--brand-blue-800);
}
.btn-on-dark {
    background: transparent;
    color: white;
    border: 1px solid rgba(255, 255, 255, 0.32);
}
.btn-on-dark:hover {
    background: rgba(255, 255, 255, 0.16);
    border-color: var(--brand-green-500);
}

/* ===== FOOTER (utilisé par bornes-VE via includes/footer.php) ===== */
.site-footer {
    background: var(--brand-blue-900);
    color: rgba(255, 255, 255, 0.78);
    padding: 80px clamp(16px, 4vw, 48px) 32px;
    font-family: var(--font-body);
}
.footer-inner {
    max-width: 1280px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 48px;
}
.footer-brand img { height: 48px; width: auto; margin-bottom: 16px; }
.footer-brand p { font-size: 14px; line-height: 1.6; max-width: 320px; }
.footer-col h4 {
    font-family: var(--font-display);
    font-weight: 700;
    font-size: 13px;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: white;
    margin: 0 0 16px;
}
.footer-col ul {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
    flex-direction: column;
    gap: 10px;
}
.footer-col a {
    color: rgba(255, 255, 255, 0.72);
    font-size: 14px;
    transition: color .2s var(--ease-out);
}
.footer-col a:hover { color: var(--brand-green-500); }
.footer-bottom {
    max-width: 1280px;
    margin: 64px auto 0;
    padding-top: 24px;
    border-top: 1px solid rgba(255, 255, 255, 0.08);
    display: flex;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 16px;
    font-size: 13px;
    color: rgba(255, 255, 255, 0.54);
}
.footer-bottom a { color: rgba(255, 255, 255, 0.72); }
.footer-bottom a:hover { color: var(--brand-green-500); }

/* ===== BURGER (mobile) ===== */
.nav-toggle {
    display: none;
    width: 44px;
    height: 44px;
    border: 0;
    background: transparent;
    cursor: pointer;
    padding: 10px;
    position: relative;
    z-index: 200;
    flex-direction: column;
    justify-content: space-between;
    align-items: stretch;
}
.nav-toggle span {
    display: block;
    width: 100%;
    height: 2px;
    background: #fff;
    border-radius: 2px;
    transition: transform var(--d-base) var(--ease-out),
                opacity var(--d-fast) var(--ease-out);
    transform-origin: center;
}
.nav.is-open .nav-toggle span:nth-child(1) {
    transform: translateY(10px) rotate(45deg);
}
.nav.is-open .nav-toggle span:nth-child(2) {
    opacity: 0;
    transform: scaleX(0);
}
.nav.is-open .nav-toggle span:nth-child(3) {
    transform: translateY(-10px) rotate(-45deg);
}

@media (max-width: 900px) {
    .footer-inner { grid-template-columns: 1fr 1fr; }
    .footer-brand { grid-column: 1 / -1; }

    /* Affichage du burger */
    .nav-toggle { display: flex; }

    /* Menu en overlay plein écran */
    .nav-links {
        position: fixed;
        inset: 0;
        background: rgba(11, 42, 74, 0.98);
        backdrop-filter: blur(20px);
        -webkit-backdrop-filter: blur(20px);
        flex-direction: column;
        justify-content: center;
        align-items: center;
        gap: 28px;
        padding: 80px 24px 40px;
        transform: translateX(100%);
        transition: transform var(--d-base) var(--ease-out),
                    opacity var(--d-base) var(--ease-out);
        z-index: 150;
        opacity: 0;
        pointer-events: none;
    }
    .nav.is-open .nav-links {
        transform: translateX(0);
        opacity: 1;
        pointer-events: auto;
    }
    .nav-links a {
        display: inline-flex;
        font-size: 22px;
        font-weight: 700;
        color: #fff;
        padding: 4px 0;
    }
    .nav-links a::after { display: none; }
    .nav-links a.btn {
        margin-top: 16px;
        padding: 16px 32px;
        font-size: 16px;
    }
}
@media (max-width: 600px) {
    .footer-inner { grid-template-columns: 1fr; }
}