:root {
    --bg-main: #181A18;
    --bg-secondary: #111311;
    --text-main: #ffffff;
    --text-secondary: rgba(255,255,255,0.62);
    --text-muted: rgba(255,255,255,0.45);
    --border-color: rgba(255,255,255,0.08);
    --border-strong: rgba(255,255,255,0.12);
    --card-bg: rgba(255,255,255,0.04);
    --card-bg-soft: rgba(255,255,255,0.03);
    --card-bg-hover: rgba(255,255,255,0.06);
    --header-bg: rgba(10,10,14,0.65);
    --button-bg: rgba(255,255,255,0.05);
    --button-border: rgba(255,255,255,0.12);
    --button-text: #ffffff;
    --overlay-bg: rgba(0,0,0,0.72);
    --modal-shadow: 0 20px 60px rgba(0,0,0,0.35);
}

body.light {
    --bg-main: #ffffff;
    --bg-secondary: #f3f4f6;
    --text-main: #111111;
    --text-secondary: rgba(0,0,0,0.68);
    --text-muted: rgba(0,0,0,0.45);
    --border-color: rgba(0,0,0,0.08);
    --border-strong: rgba(0,0,0,0.12);
    --card-bg: rgba(0,0,0,0.03);
    --card-bg-soft: rgba(0,0,0,0.025);
    --card-bg-hover: rgba(0,0,0,0.06);
    --header-bg: rgba(255,255,255,0.75);
    --button-bg: rgba(0,0,0,0.04);
    --button-border: rgba(0,0,0,0.12);
    --button-text: #111111;
    --overlay-bg: rgba(255,255,255,0.55);
    --modal-shadow: 0 20px 60px rgba(0,0,0,0.12);
}

*{
    box-sizing: border-box;
}

body{
    margin: 0;
    padding-top: 70px;
    font-family: Arial, Helvetica, sans-serif;
    color: var(--text-main);
    background:
            radial-gradient(circle at top center, rgba(120, 120, 120, 0.08), transparent 35%),
            linear-gradient(90deg, var(--bg-main) 0%, var(--bg-secondary) 50%, var(--bg-main) 100%);
    transition: background 0.35s ease, color 0.35s ease;
}

/* HEADER */
.main_header{
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 60px;
    background: var(--header-bg);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border-color);
    z-index: 1000;
}

.header_container{
    width: min(1200px, 92%);
    margin: 0 auto;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 18px;
}

.header_logo{
    font-weight: 600;
    font-size: 0.95rem;
    letter-spacing: 0.08em;
    color: var(--text-main);
    text-decoration: none;
}

.header_nav{
    display: flex;
    gap: 26px;
}

.header_nav a{
    font-size: 0.82rem;
    text-decoration: none;
    color: rgba(255,255,255,0.55);
    letter-spacing: 0.08em;
    text-transform: uppercase;
    transition: 0.2s ease;
}

body.light .header_nav a{
    color: rgba(0,0,0,0.55);
}

.header_nav a:hover{
    color: var(--text-main);
}

.header_actions{
    display: flex;
    align-items: center;
}

.theme_toggle{
    width: 34px;
    height: 34px;
    border-radius: 8px;
    border: 1px solid var(--button-border);
    background: var(--button-bg);
    color: var(--button-text);
    cursor: pointer;
    transition: 0.2s ease;
}

.theme_toggle:hover{
    background: var(--card-bg-hover);
    border-color: var(--border-strong);
}

/* PAGE */
.veille-page{
    width: min(1200px, 92%);
    margin: 0 auto;
    padding: 70px 0 90px;
}

.veille-page-header{
    max-width: 780px;
    margin-bottom: 48px;
}

.veille-kicker{
    margin: 0 0 12px 0;
    font-size: 0.78rem;
    text-transform: uppercase;
    letter-spacing: 0.22em;
    color: var(--text-muted);
}

.veille-page-header h1{
    margin: 0 0 16px 0;
    font-size: clamp(2rem, 4vw, 3.4rem);
    line-height: 1.05;
}

.veille-page-intro{
    margin: 0 0 18px 0;
    max-width: 700px;
    color: var(--text-secondary);
    line-height: 1.7;
}

.veille-back-link{
    color: color-mix(in srgb, var(--text-main) 82%, transparent);
    text-decoration: none;
    border-bottom: 1px solid color-mix(in srgb, var(--text-main) 25%, transparent);
    padding-bottom: 3px;
}

.veille-back-link:hover{
    color: var(--text-main);
    border-color: color-mix(in srgb, var(--text-main) 60%, transparent);
}

/* LIBRARY */
.veille-library{
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 22px;
}

.veille-library-card{
    border: 1px solid var(--border-color);
    background: var(--card-bg);
    border-radius: 18px;
    padding: 22px;
    cursor: pointer;
    transition: 0.2s ease;
}

.veille-library-card:hover{
    background: var(--card-bg-hover);
    border-color: color-mix(in srgb, var(--border-strong) 140%, transparent);
    transform: translateY(-3px);
}

.veille-card-top{
    display: flex;
    align-items: flex-start;
    gap: 16px;
    margin-bottom: 14px;
}

.veille-card-image{
    width: 64px;
    height: 64px;
    object-fit: cover;
    border-radius: 12px;
    flex-shrink: 0;
    border: 1px solid var(--border-color);
    background: var(--card-bg);
}

.veille-card-heading{
    min-width: 0;
    flex: 1;
}

.veille-card-meta{
    display: flex;
    justify-content: space-between;
    gap: 12px;
    margin-bottom: 8px;
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--text-muted);
}

.veille-card-heading h2{
    margin: 0;
    font-size: 1.2rem;
    line-height: 1.35;
    color: var(--text-main);
}

.veille-library-card p{
    margin: 0;
    color: var(--text-secondary);
    line-height: 1.65;
}

/* MODAL */
.veille-modal{
    position: fixed;
    inset: 0;
    display: none;
    z-index: 999;
}

.veille-modal.active{
    display: block;
}

.veille-modal-overlay{
    position: absolute;
    inset: 0;
    background: var(--overlay-bg);
    backdrop-filter: blur(4px);
}

.veille-modal-content{
    position: relative;
    z-index: 2;
    width: min(900px, 92%);
    margin: 50px auto;
    background: linear-gradient(90deg, var(--bg-main) 0%, var(--bg-secondary) 50%, var(--bg-main) 100%);
    border: 1px solid var(--border-strong);
    border-radius: 20px;
    overflow: hidden;
    box-shadow: var(--modal-shadow);
}

.veille-modal-close{
    position: absolute;
    top: 14px;
    right: 14px;
    width: 42px;
    height: 42px;
    border: 1px solid var(--button-border);
    border-radius: 12px;
    background: var(--button-bg);
    color: var(--button-text);
    font-size: 1.6rem;
    cursor: pointer;
    z-index: 3;
}

.veille-modal-close:hover{
    background: var(--card-bg-hover);
}

.veille-modal-image{
    display: block;
    width: 100%;
    height: 280px;
    object-fit: cover;
    background: var(--card-bg);
    border-bottom: 1px solid var(--border-color);
}

.veille-modal-body{
    padding: 28px;
}

.veille-modal-meta{
    display: flex;
    justify-content: space-between;
    gap: 12px;
    margin-bottom: 14px;
    font-size: 0.78rem;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--text-muted);
}

.veille-modal-body h2{
    margin: 0 0 16px 0;
    font-size: 2rem;
    line-height: 1.2;
}

.veille-modal-body p{
    margin: 0 0 24px 0;
    color: color-mix(in srgb, var(--text-main) 68%, transparent);
    line-height: 1.8;
    font-size: 1rem;
}

.veille-modal-link{
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 12px 18px;
    border: 1px solid var(--button-border);
    border-radius: 10px;
    color: var(--button-text);
    text-decoration: none;
    background: var(--button-bg);
    transition: 0.2s ease;
}

.veille-modal-link:hover{
    background: var(--card-bg-hover);
    border-color: var(--border-strong);
}

@media (max-width: 900px){
    .veille-library{
        grid-template-columns: 1fr;
    }

    .veille-modal-image{
        height: 220px;
    }

    .veille-modal-body h2{
        font-size: 1.55rem;
    }
}

@media (max-width: 800px){
    .header_nav{
        display: none;
    }
}

@media (max-width: 640px){
    .veille-page{
        width: 92%;
        padding: 50px 0 70px;
    }

    .veille-library-card{
        padding: 18px;
    }

    .veille-card-top{
        gap: 12px;
    }

    .veille-card-image{
        width: 54px;
        height: 54px;
    }

    .veille-card-heading h2{
        font-size: 1rem;
    }

    .veille-modal-content{
        margin: 24px auto;
    }

    .veille-modal-image{
        height: 180px;
    }

    .veille-modal-body{
        padding: 20px;
    }
}