/* ============================================================
   VARIABLES & RESET
   ============================================================ */
:root {
    --accent:       #9b8ea8;
    --text-primary: #1a1a2e;
    --transition:   0.55s cubic-bezier(0.4, 0, 0.2, 1);
    --bubble-hue:   0deg;
}

[data-theme="green"] { --bubble-hue: 90deg;  }
[data-theme="tech"]  { --bubble-hue: 200deg; }

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

html, body {
    height: 100%;
    font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
    background: #ffffff;
    overflow: hidden;
}


/* ============================================================
   FONDS PLEINE PAGE
   ============================================================ */
.page-bg {
    position: fixed;
    inset: 0;
    z-index: 0;
    opacity: 0;
    transition: opacity var(--transition);
    background-size: cover;
    background-position: center;
}

.page-bg::after {
    content: '';
    position: absolute;
    inset: 0;
}

.page-bg-green {
    background-image: url('../images/espaces-verts-bg.jpg');
}
.page-bg-green::after {
    background: linear-gradient(135deg,
        rgba(5,  35, 18, 0.72) 0%,
        rgba(20, 90, 50, 0.45) 50%,
        rgba(60, 160, 90, 0.20) 100%
    );
}

.page-bg-tech {
    background-image: url('../images/tech-bg.jpg');
}
.page-bg-tech::after {
    background: linear-gradient(135deg,
        rgba(3,  18, 55, 0.75) 0%,
        rgba(15, 70, 160, 0.45) 50%,
        rgba(60, 130, 255, 0.20) 100%
    );
}

[data-theme="green"] .page-bg-green { opacity: 1; }
[data-theme="tech"]  .page-bg-tech  { opacity: 1; }


/* ============================================================
   BULLES CHROMA RGB
   ============================================================ */
.bubbles-container {
    position: fixed;
    inset: 0;
    pointer-events: none;
    z-index: 1;
    overflow: hidden;
    filter: hue-rotate(var(--bubble-hue));
    transition: filter var(--transition);
}

.bubble {
    position: absolute;
    bottom: -140px;
    border-radius: 50%;
    opacity: 0;
    animation: floatUp var(--dur, 13s) ease-in var(--delay, 0s) infinite;

    background:
        radial-gradient(
            circle at 33% 28%,
            rgba(255, 255, 255, 0.88) 0%,
            rgba(255, 255, 255, 0.28) 25%,
            transparent 55%
        ),
        radial-gradient(
            circle at 65% 65%,
            rgba(180, 120, 255, 0.48) 0%,
            rgba(80,  180, 255, 0.32) 30%,
            rgba(255, 100, 180, 0.18) 60%,
            transparent 80%
        ),
        conic-gradient(
            from 0deg,
            rgba(255,  80, 120, 0.22),
            rgba(255, 180,  60, 0.18),
            rgba( 80, 220, 120, 0.22),
            rgba( 60, 160, 255, 0.22),
            rgba(180,  80, 255, 0.22),
            rgba(255,  80, 120, 0.22)
        );

    box-shadow:
        inset 0 0 12px rgba(255, 255, 255, 0.55),
        inset 2px 2px 6px  rgba(255, 255, 255, 0.75),
        0 4px 20px rgba(160, 120, 255, 0.12);
}

@keyframes floatUp {
    0%   { transform: translateY(0) translateX(0) scale(0.4) rotate(0deg);   opacity: 0; }
    8%   { opacity: 0.60; }
    50%  { transform: translateY(-50vh) translateX(var(--drift, 30px)) scale(1) rotate(180deg); opacity: 0.45; }
    92%  { opacity: 0.25; }
    100% { transform: translateY(-105vh) translateX(calc(var(--drift, 30px) * 0.5)) scale(0.7) rotate(360deg); opacity: 0; }
}


/* ============================================================
   LAYOUT
   ============================================================ */
.main-container {
    position: relative;
    z-index: 2;
    display: flex;
    flex-direction: column;
    align-items: center;
    height: 100vh;
}


/* ============================================================
   HEADER
   ============================================================ */
.site-header {
    padding: 2rem 0 1.5rem;
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.55rem;
}

.logo-icon {
    font-size: 1.4rem;
    color: var(--accent);
    line-height: 1;
    transition: color var(--transition);
}

[data-theme="green"] .logo-icon { color: #4ade80; }
[data-theme="tech"]  .logo-icon { color: #60a5fa; }

.logo-text {
    font-size: 1.35rem;
    font-weight: 700;
    letter-spacing: -0.02em;
    color: var(--text-primary);
    transition: color var(--transition), text-shadow var(--transition);
}

[data-theme] .logo-text {
    color: #ffffff;
    text-shadow: 0 0 20px rgba(255, 255, 255, 0.35);
}

.logo-text::after {
    content: '';
    display: block;
    height: 2px;
    background: var(--accent);
    border-radius: 2px;
    margin-top: 2px;
    transition: background var(--transition);
}

[data-theme="green"] .logo-text::after { background: #4ade80; }
[data-theme="tech"]  .logo-text::after { background: #60a5fa; }


/* ============================================================
   CARDS WRAPPER
   ============================================================ */
.cards-wrapper {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 3.5rem;
}


/* ============================================================
   CARDS
   ============================================================ */
.card {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.85rem;
    text-decoration: none;
    cursor: pointer;
}

.card-box {
    width: 120px;
    height: 120px;
    border-radius: 28px;
    background: rgba(255, 255, 255, 0.55);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 2.5px solid rgba(160, 150, 185, 0.45);
    box-shadow:
        0 6px 20px rgba(0, 0, 0, 0.10),
        0 1px 4px  rgba(0, 0, 0, 0.06);
    display: flex;
    align-items: center;
    justify-content: center;
    transition:
        transform var(--transition),
        box-shadow var(--transition),
        border-color var(--transition),
        background var(--transition),
        opacity var(--transition);
}

.card-green .card-box {
    background: rgba(200, 240, 210, 0.75);
    border-color: rgba(100, 190, 120, 0.55);
}

.card-tech .card-box {
    background: rgba(15, 50, 150, 0.62);
    border-color: rgba(60, 120, 220, 0.55);
}

.card-logo {
    width: 92px;
    height: 92px;
    object-fit: contain;
    transition: transform var(--transition);
}

.card-green .card-logo {
    filter: drop-shadow(0 2px 6px rgba(0, 0, 0, 0.55));
}

.card:hover .card-logo {
    transform: scale(1.08);
}

.card-green:hover .card-box,
.card-tech:hover  .card-box {
    transform: translateY(-10px) scale(1.08);
    box-shadow:
        0 24px 70px rgba(0, 0, 0, 0.55);
    border-color: rgba(255, 255, 255, 0.90);
}

.card-green:hover .card-box { background: #ffffff; }
.card-tech:hover  .card-box { background: #0b1628; }

/* Carte non survolée — s'efface (plus transparente que l'état par défaut) */
[data-theme="green"] .card-tech  .card-box,
[data-theme="tech"]  .card-green .card-box { opacity: 0.28; }




/* ============================================================
   RESPONSIVE
   ============================================================ */
@media (max-width: 480px) {
    .cards-wrapper { gap: 2rem; }

    .card-box {
        width: 100px;
        height: 100px;
        border-radius: 22px;
    }

    .card-box svg { width: 42px; height: 42px; }
}