/* ========================================
   Portfolio E5 - Valentin ACBARD
   Style : Sobre & Pro (Bleu nuit / Blanc)
   ======================================== */

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --bleu-nuit: #0f1e3d;
    --bleu-nuit-clair: #1a2f5c;
    --bleu-accent: #2c5eb8;
    --bleu-hover: #3b74d9;
    --blanc: #ffffff;
    --gris-fond: #f5f7fa;
    --gris-bord: #dde3ec;
    --gris-texte: #4a5568;
    --gris-clair: #6b7280;
    --shadow-sm: 0 2px 4px rgba(15, 30, 61, 0.06);
    --shadow-md: 0 4px 12px rgba(15, 30, 61, 0.08);
    --shadow-lg: 0 8px 24px rgba(15, 30, 61, 0.12);
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: #2d3748;
    background: var(--blanc);
}

.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 24px;
}

/* ========== NAVBAR ========== */
.navbar {
    background: var(--bleu-nuit);
    color: var(--blanc);
    padding: 18px 0;
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: var(--shadow-md);
}

.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 20px;
    font-weight: 700;
    color: var(--blanc);
    text-decoration: none;
    letter-spacing: 1.5px;
}

.nav-links {
    list-style: none;
    display: flex;
    gap: 8px;
}

.nav-links a {
    color: rgba(255, 255, 255, 0.8);
    text-decoration: none;
    padding: 8px 16px;
    border-radius: 6px;
    transition: all 0.2s;
    font-size: 15px;
    font-weight: 500;
}

.nav-links a:hover {
    background: rgba(255, 255, 255, 0.1);
    color: var(--blanc);
}

.nav-links a.active {
    background: var(--bleu-accent);
    color: var(--blanc);
}

/* ========== HERO ========== */
.hero {
    background: linear-gradient(135deg, var(--bleu-nuit) 0%, var(--bleu-nuit-clair) 100%);
    color: var(--blanc);
    padding: 80px 0 60px;
    text-align: center;
}

.hero h1 {
    font-size: 42px;
    font-weight: 700;
    margin-bottom: 12px;
    letter-spacing: -0.5px;
}

.subtitle {
    font-size: 18px;
    opacity: 0.85;
    margin-bottom: 32px;
}

.hero-info {
    display: inline-block;
    background: rgba(255, 255, 255, 0.08);
    padding: 20px 32px;
    border-radius: 8px;
    border: 1px solid rgba(255, 255, 255, 0.15);
    text-align: left;
}

.hero-info div {
    padding: 4px 0;
    font-size: 15px;
}

.hero-info strong {
    font-size: 17px;
    color: var(--blanc);
}

/* ========== PAGE HEADER (pages internes) ========== */
.page-header {
    background: linear-gradient(135deg, var(--bleu-nuit) 0%, var(--bleu-nuit-clair) 100%);
    color: var(--blanc);
    padding: 50px 0 40px;
}

.page-header h1 {
    font-size: 32px;
    font-weight: 700;
    margin-bottom: 8px;
}

.page-header .subtitle {
    margin-bottom: 0;
    font-size: 17px;
}

/* ========== SECTIONS ========== */
.section {
    padding: 60px 0;
}

.section-alt {
    background: var(--gris-fond);
}

.section h2 {
    font-size: 28px;
    color: var(--bleu-nuit);
    margin-bottom: 32px;
    font-weight: 700;
    position: relative;
    padding-bottom: 12px;
}

.section h2::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 60px;
    height: 3px;
    background: var(--bleu-accent);
    border-radius: 2px;
}

/* ========== CARDS PRÉSENTATION ========== */
.card {
    background: var(--blanc);
    padding: 32px;
    border-radius: 10px;
    border: 1px solid var(--gris-bord);
    box-shadow: var(--shadow-sm);
}

.card p {
    margin-bottom: 14px;
    color: var(--gris-texte);
    font-size: 16px;
}

.card p:last-child {
    margin-bottom: 0;
}

/* ========== NAV CARDS (accueil) ========== */
.nav-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 24px;
}

.nav-card {
    background: var(--blanc);
    padding: 32px 28px;
    border-radius: 10px;
    border: 1px solid var(--gris-bord);
    text-decoration: none;
    color: inherit;
    transition: all 0.25s;
    position: relative;
    overflow: hidden;
}

.nav-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
    border-color: var(--bleu-accent);
}

.nav-card-number {
    font-size: 14px;
    font-weight: 700;
    color: var(--bleu-accent);
    letter-spacing: 2px;
    margin-bottom: 12px;
}

.nav-card h3 {
    font-size: 19px;
    color: var(--bleu-nuit);
    margin-bottom: 12px;
    font-weight: 600;
}

.nav-card p {
    color: var(--gris-texte);
    font-size: 14px;
    margin-bottom: 18px;
    line-height: 1.5;
}

.nav-card-link {
    color: var(--bleu-accent);
    font-weight: 600;
    font-size: 14px;
}

/* ========== RÉALISATIONS ========== */
.realisation {
    background: var(--blanc);
    padding: 28px 32px;
    border-radius: 10px;
    border: 1px solid var(--gris-bord);
    box-shadow: var(--shadow-sm);
    margin-bottom: 24px;
    transition: box-shadow 0.2s;
}

.realisation:hover {
    box-shadow: var(--shadow-md);
}

.realisation-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: 16px;
    margin-bottom: 16px;
    padding-bottom: 16px;
    border-bottom: 1px solid var(--gris-bord);
    flex-wrap: wrap;
}

.realisation h2 {
    font-size: 20px;
    color: var(--bleu-nuit);
    margin-bottom: 6px;
    font-weight: 600;
}

.realisation h2::after {
    display: none;
}

.period {
    font-size: 13px;
    color: var(--gris-clair);
    font-weight: 500;
}

.competences {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    justify-content: flex-end;
}

.badge {
    display: inline-block;
    background: #e7efff;
    color: var(--bleu-accent);
    padding: 4px 10px;
    border-radius: 4px;
    font-size: 12px;
    font-weight: 600;
}

.description {
    color: var(--gris-texte);
    margin-bottom: 18px;
    font-size: 15px;
}

/* ========== DOCUMENTS ========== */
.documents h4 {
    font-size: 14px;
    color: var(--bleu-nuit);
    margin-bottom: 10px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.doc-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.doc-link {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 16px;
    background: var(--gris-fond);
    border: 1px solid var(--gris-bord);
    border-left: 3px solid var(--bleu-accent);
    border-radius: 6px;
    text-decoration: none;
    color: var(--bleu-nuit);
    font-size: 14px;
    font-weight: 500;
    transition: all 0.2s;
}

.doc-link:hover {
    background: #e7efff;
    border-left-color: var(--bleu-hover);
    border-color: var(--bleu-accent);
    transform: translateX(4px);
}

.doc-icon {
    font-size: 18px;
    flex-shrink: 0;
}

/* ========== FOOTER ========== */
footer {
    background: var(--bleu-nuit);
    color: rgba(255, 255, 255, 0.7);
    padding: 24px 0;
    text-align: center;
    margin-top: 40px;
}

footer p {
    font-size: 14px;
}

/* ========== RESPONSIVE ========== */
@media (max-width: 768px) {
    .nav-container {
        flex-direction: column;
        gap: 12px;
    }

    .nav-links {
        flex-wrap: wrap;
        justify-content: center;
    }

    .hero h1 {
        font-size: 30px;
    }

    .page-header h1 {
        font-size: 24px;
    }

    .realisation-header {
        flex-direction: column;
    }

    .competences {
        justify-content: flex-start;
    }

    .realisation {
        padding: 20px 18px;
    }
}