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

body {
    font-family: Arial, sans-serif;
    min-height: 100vh;
    position: relative;
    overflow-x: hidden;
}

/* ── Layer stacking ── */
.background-layer, .logo-layer, .decoration-layer {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-size: cover;
    background-position: right bottom;
    background-repeat: no-repeat;
}

.background-layer { z-index: -3; }
.decoration-layer { z-index: -2; }
.logo-layer       { z-index: -1; }

/* ── Content ── */
.content {
    padding: 2rem;
    color: white;
    max-width: 1200px;
    margin: 0 auto;
    position: relative;
    z-index: 1;
}

/* Default (desktop): show text title, hide logo */
.title-text {
    display: block;
    font-size: 3rem;
    margin-bottom: 1rem;
}

.title-logo {
    display: none;
    height: 2.5rem;
    width: auto;
    margin-bottom: 1rem;
}

/* ── Footer ── */
.site-footer {
    position: fixed;
    bottom: 0;
    left: 0;
    width: 100%;
    padding: 0.8rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    color: rgba(255, 255, 255, 0.5);
    font-size: 0.75rem;
    z-index: 1;
}

.site-footer a {
    color: rgba(255, 255, 255, 0.5);
    text-decoration: none;
}

.site-footer a:hover {
    color: rgba(255, 255, 255, 0.8);
    text-decoration: underline;
}

/* ── Projects Section ── */
.projects-section {
    margin-top: 2.5rem;
    margin-bottom: 3rem;
    max-width: 480px;
}

.projects-section h3 {
    font-size: 1.1rem;
    font-weight: 500;
    color: rgba(255, 255, 255, 0.7);
    margin-bottom: 0.4rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
}

.projects-hint {
    font-size: 0.75rem;
    color: rgba(255, 255, 255, 0.4);
    margin-bottom: 1rem;
}

.projects-grid {
    display: flex;
    flex-wrap: wrap;
    gap: 0.6rem;
}

.project-badge {
    position: relative;
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 2rem;
    padding: 0.5rem 1rem;
    cursor: pointer;
    font-family: inherit;
    font-size: 0.85rem;
    color: rgba(255, 255, 255, 0.85);
    transition: all 0.2s ease;
}

.project-badge:hover,
.project-badge:focus {
    background: rgba(255, 255, 255, 0.2);
    border-color: rgba(255, 255, 255, 0.4);
    outline: none;
}

.project-name {
    font-family: 'Courier New', monospace;
    font-weight: 600;
}

.project-tooltip {
    position: absolute;
    bottom: calc(100% + 0.5rem);
    left: 50%;
    transform: translateX(-50%);
    width: max-content;
    max-width: 280px;
    padding: 0.75rem 1rem;
    background: rgba(20, 20, 30, 0.95);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 0.5rem;
    font-family: Arial, sans-serif;
    font-size: 0.8rem;
    font-weight: 400;
    line-height: 1.4;
    color: rgba(255, 255, 255, 0.9);
    text-align: center;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.2s ease, visibility 0.2s ease;
    pointer-events: none;
    z-index: 100;
}

.project-tooltip::after {
    content: '';
    position: absolute;
    top: 100%;
    left: 50%;
    transform: translateX(-50%);
    border: 6px solid transparent;
    border-top-color: rgba(20, 20, 30, 0.95);
}

.project-badge:hover .project-tooltip,
.project-badge:focus .project-tooltip {
    opacity: 1;
    visibility: visible;
}

/* ── Default: Desktop (>1024px) ── */
.background-layer {
    background-image: url(../images/background.f5aafd5167bf1e54dedb.svg);
}
.logo-layer {
    background-image: url(../images/logo.cf796dc6f72854f02579.svg);
}
.decoration-layer {
    background-image: url(../images/decoration.ad74b1a1416a657ef494.svg);
}

/* ── Tablet (768px – 1024px) ── */
@media (max-width: 1024px) {
    .background-layer {
        background-image: url(../images/background.a77e78ac8852e32556ea.svg);
    }
    .logo-layer {
        background-image: url(../images/logo.ac66a61fda994acdd7d2.svg);
    }
    .decoration-layer {
        background-image: url(../images/decoration.a198f2e25c4c577b8b6c.svg);
    }

    .title-text {
        display: none;
    }

    .title-logo {
        display: block;
        height: 2.5rem;
    }

    .content {
        padding: 1.5rem;
        max-width: 900px;
    }

    h2 {
        font-size: 1.3rem;
    }

    .projects-section {
        margin-top: 2rem;
    }

    .projects-section h3 {
        font-size: 1rem;
    }

    .project-badge {
        padding: 0.4rem 0.8rem;
        font-size: 0.8rem;
    }

    .project-tooltip {
        max-width: 240px;
        font-size: 0.75rem;
    }
}

/* Tablet portrait: use portrait assets */
@media (max-width: 1024px) and (orientation: portrait) {
    .background-layer {
        background-image: url(../images/background.faefb04ff42a75961aa0.svg);
    }
    .logo-layer {
        display: none;
    }
    .decoration-layer {
        background-image: url(../images/decoration.426b9e51316d7a5b7130.svg);
    }
}

/* ── Mobile (<768px) ── */
@media (max-width: 767px) {
    .background-layer {
        background-image: url(../images/background.d2a3d09e656e9723f889.svg);
    }
    .logo-layer {
        display: none;
    }
    .decoration-layer {
        background-image: url(../images/decoration.a0134b55483e41ac8081.svg);
    }

    .title-logo {
        height: 2rem;
    }

    .content {
        padding: 1rem;
        max-width: 100%;
    }

    h2 {
        font-size: 1.1rem;
        margin-bottom: 1.5rem;
    }

    .site-footer {
        padding: 0.6rem 1rem;
        font-size: 0.65rem;
    }

    .projects-section {
        margin-top: 1.5rem;
        margin-bottom: 4rem;
    }

    .projects-section h3 {
        font-size: 0.9rem;
    }

    .projects-grid {
        gap: 0.5rem;
    }

    .project-badge {
        padding: 0.35rem 0.7rem;
        font-size: 0.75rem;
    }

    .project-tooltip {
        max-width: 200px;
        font-size: 0.7rem;
        padding: 0.6rem 0.8rem;
    }
}