/* ================= VARIABLES ================= */
:root {
    --bg:         #0D1B2A;
    --bg-card:    #132336;
    --text:       #F0EDE8;
    --text-muted: #9AABBB;
    --accent:     #C9A96E;
    --border:     rgba(201, 169, 110, 0.25);
    --font:       'Inter', sans-serif;
    --radius:     6px;
    --transition: 0.35s ease;
}

.light-mode {
    --bg:         #F4F1EC;
    --bg-card:    #FFFFFF;
    --text:       #0D1B2A;
    --text-muted: #4A5E72;
    --accent:     #9A7A3E;
    --border:     rgba(154, 122, 62, 0.25);
}

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

html { scroll-behavior: smooth; }

body {
    background: var(--bg);
    color: var(--text);
    font-family: var(--font);
    min-height: 100vh;
    padding: 24px 32px;
    transition: background var(--transition), color var(--transition);
    line-height: 1.6;
}

/* ================= NAVBAR ================= */
.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    max-width: 1200px;
    margin: 0 auto 20px auto;
    padding-bottom: 20px;
    border-bottom: 1px solid var(--border);
    flex-wrap: wrap;
    gap: 12px;
}

.brand {
    font-size: 1.6rem;
    font-weight: 900;
    letter-spacing: 3px;
    color: var(--text);
    text-transform: uppercase;
}

.main-nav ul {
    list-style: none;
    display: flex;
    gap: 36px;
}

.main-nav ul li a {
    text-decoration: none;
    color: var(--text-muted);
    font-size: 0.9rem;
    font-weight: 500;
    letter-spacing: 1px;
    text-transform: uppercase;
    transition: color var(--transition);
}

.main-nav ul li a:hover,
.active-link {
    color: var(--accent) !important;
    font-weight: 700 !important;
}

.header-utils {
    display: flex;
    gap: 10px;
    align-items: center;
}

.util-select,
.util-button {
    padding: 7px 14px;
    border: 1px solid var(--border);
    background: transparent;
    color: var(--text-muted);
    border-radius: var(--radius);
    font-family: var(--font);
    font-size: 0.8rem;
    letter-spacing: 1px;
    cursor: pointer;
    transition: all var(--transition);
}

.util-select:hover,
.util-button:hover {
    border-color: var(--accent);
    color: var(--accent);
}

.hamburger {
    display: none;
    font-size: 1.6rem;
    cursor: pointer;
    color: var(--text);
    background: transparent;
    border: 1px solid var(--border);
    padding: 4px 10px;
    border-radius: var(--radius);
}

/* ================= HERO ================= */
.hero-section {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 78vh;
    text-align: center;
}

.hero-section .content {
    max-width: 820px;
}

.subtitle {
    font-size: 0.8rem;
    font-weight: 700;
    color: var(--accent);
    letter-spacing: 4px;
    text-transform: uppercase;
    margin-bottom: 24px;
}

h1 {
    font-size: 3.8rem;
    font-weight: 900;
    line-height: 1.1;
    margin-bottom: 24px;
    color: var(--text);
    letter-spacing: -1px;
}

.description {
    font-size: 1.1rem;
    line-height: 1.8;
    color: var(--text-muted);
    margin-bottom: 44px;
    max-width: 640px;
    margin-left: auto;
    margin-right: auto;
}

/* ================= BUTTONS ================= */
.buttons {
    display: flex;
    justify-content: center;
    gap: 16px;
    flex-wrap: wrap;
}

.button {
    padding: 14px 32px;
    text-decoration: none;
    font-weight: 700;
    font-size: 0.9rem;
    letter-spacing: 1.5px;
    text-transform: uppercase;
    border-radius: var(--radius);
    transition: all var(--transition);
    display: inline-block;
    cursor: pointer;
    border: none;
}

.button.filled {
    background: var(--accent);
    color: var(--bg);
    border: 2px solid var(--accent);
}

.button.filled:hover {
    background: transparent;
    color: var(--accent);
}

.button.outline {
    background: transparent;
    border: 2px solid var(--border);
    color: var(--text-muted);
}

.button.outline:hover {
    border-color: var(--accent);
    color: var(--accent);
}

/* ================= PAGE CONTAINER ================= */
.page-container,
.case-studies-container,
.construction-section {
    max-width: 860px;
    margin: 60px auto;
    padding: 0 16px;
}

.construction-section {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-height: 60vh;
    text-align: center;
    gap: 16px;
}

.construction-section h1 { font-size: 2.8rem; }

.construction-section p {
    color: var(--text-muted);
    max-width: 560px;
    font-size: 1.05rem;
}

/* ================= PAGE INTRO ================= */
.page-intro {
    text-align: center;
    margin-bottom: 60px;
    padding-bottom: 40px;
    border-bottom: 1px solid var(--border);
}

.page-title {
    font-size: 3rem;
    font-weight: 900;
    letter-spacing: -1px;
    margin-bottom: 16px;
}

.page-subtitle {
    color: var(--text-muted);
    font-size: 1.05rem;
    max-width: 600px;
    margin: 0 auto;
}

/* ================= CARDS ================= */
.content-card,
.case-study-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 36px;
    margin-bottom: 28px;
    transition: border-color var(--transition);
}

.content-card:hover,
.case-study-card:hover { border-color: var(--accent); }

.content-card h2,
.case-study-card h2 {
    font-size: 1.4rem;
    font-weight: 700;
    margin-bottom: 16px;
    color: var(--text);
}

.content-card h3,
.case-study-card h3 {
    font-size: 1rem;
    font-weight: 700;
    color: var(--text);
    margin-bottom: 6px;
}

.content-card p,
.case-study-card p,
.case-study-card .description {
    color: var(--text-muted);
    font-size: 0.97rem;
    line-height: 1.7;
}

.content-card ul {
    margin-top: 12px;
    padding-left: 20px;
}

.content-card ul li {
    color: var(--text-muted);
    font-size: 0.93rem;
    margin-bottom: 6px;
}

/* ================= SERVICES ================= */
.services {
    max-width: 860px;
    margin: 60px auto;
    padding: 0 16px;
}

.services > .subtitle { margin-bottom: 48px; }

.service-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 36px;
    margin-bottom: 24px;
    transition: border-color var(--transition);
}

.service-card:hover { border-color: var(--accent); }

.service-card h3 {
    font-size: 1.15rem;
    font-weight: 700;
    margin-bottom: 12px;
    color: var(--text);
}

.service-card p {
    color: var(--text-muted);
    font-size: 0.97rem;
    line-height: 1.7;
    margin-bottom: 14px;
}

.service-card ul { padding-left: 20px; }

.service-card ul li {
    color: var(--text-muted);
    font-size: 0.92rem;
    margin-bottom: 6px;
}

/* ================= TAGS ================= */
.tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 16px;
}

.tag {
    background: transparent;
    border: 1px solid var(--border);
    color: var(--accent);
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 0.78rem;
    letter-spacing: 0.5px;
    font-weight: 600;
}

/* ================= FOOTER ================= */
footer {
    margin-top: 80px;
    padding-top: 28px;
    border-top: 1px solid var(--border);
    text-align: center;
}

.footer-content {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 16px;
    flex-wrap: wrap;
    color: var(--text-muted);
    font-size: 0.82rem;
    letter-spacing: 0.5px;
}

.footer-link {
    color: var(--text-muted);
    text-decoration: none;
    transition: color var(--transition);
}

.footer-link:hover { color: var(--accent); }

/* ================= MOBILE ================= */
@media (max-width: 768px) {
    body { padding: 16px; }

    .navbar {
        flex-wrap: wrap;
        align-items: center;
    }

    .hamburger { display: block; }

    /* Menu s'ouvre en dessous — prend toute la largeur */
    .main-nav {
        display: none;
        width: 100%;
        order: 4; /* toujours en dessous de tout */
        border-top: 1px solid var(--border);
        padding-top: 20px;
        margin-top: 12px;
    }

    .main-nav.active { display: block; }

    .main-nav ul {
        flex-direction: column;
        align-items: center;
        gap: 20px;
    }

    .main-nav ul li a {
        font-size: 1rem;
    }

    /* Brand à gauche, hamburger + utils à droite */
    .brand { order: 1; }
    .hamburger { order: 2; margin-left: auto; }
    .header-utils { order: 3; }

    h1 { font-size: 2.2rem; }
    .page-title { font-size: 1.8rem; }

    .buttons { flex-direction: column; align-items: stretch; }
    .button { width: 100%; text-align: center; }

    .content-card, .case-study-card, .service-card { padding: 20px; }

    .construction-section h1 { font-size: 2rem; }
}