:root {
    --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}
[data-theme="light"], :root:not([data-theme="dark"]) {
    --bg: #FAF8F5;
    --surface: #FFFFFF;
    --surface-2: #F2EFE9;
    --border: #E8E2D9;
    --primary: #C5A8D6;
    --secondary: #A8C8D6;
    --accent: #D6A8B8;
    --text-1: #2C2825;
    --text-2: #6B6460;
    --text-3: #A09890;
}
* { margin: 0; padding: 0; box-sizing: border-box; }
html {
    scroll-snap-type: y mandatory;
    overflow-y: scroll;
    height: 100%;
}
body {
    height: 100%;
    background-color: var(--bg);
    color: var(--text-1);
    font-family: "Tiny5", sans-serif;
    font-size: 1.5rem;
    line-height: 1.2;
}
body::before {
    content: '';
    position: fixed;
    inset: 0;
    background: url('../pic/sakura.gif') no-repeat center center;
    background-size: cover;
    z-index: -1;
}
@supports (-webkit-touch-callout: none) {
    body::before {
        position: absolute;
        min-height: 100dvh;
    }
}
.Header {
    position: fixed;
    top: 0; left: 0;
    width: 100%;
    z-index: 100;
    background: transparent;
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    display: flex;
    align-items: center;
    padding: 1.25rem 0;
}
.hdr-burger {
    display: flex;
    flex-direction: column;
    gap: 7px;
    cursor: pointer;
    padding: 4px;
    margin-left: 1.5rem;
}
.hdr-burger span {
    display: block;
    width: 36px;
    height: 3px;
    background: var(--text-1);
}
.snap-section {
    scroll-snap-align: start;
    height: 100dvh;
    display: flex;
    flex-direction: column;
    padding: 5rem 2rem 1.5rem;
    overflow: hidden;
}
.snap-section > .section-label {
    font-size: 5rem;
    color: var(--secondary);
    margin-bottom: 1rem;
    flex-shrink: 0;
}
#s-title {
    align-items: center;
    justify-content: center;
    padding: 0;
}
.site-title {
    font-size: 15rem;
    color: var(--text-1);
    text-align: center;
}
#s-title p {
    font-size: clamp(1.5rem, 6vw, 4rem);
    text-align: center;
}
.section-content {
    flex: 1;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    gap: 1rem;
    min-height: 0;
}
.grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(12rem, 1fr));
    gap: 1rem;
}
.card {
    border: 0.3rem solid var(--border);
    padding: 1rem;
    border-radius: 0;
    background-color: var(--surface);
    transition: border-color var(--transition);
}
.card:hover { border-color: var(--secondary); }
ul { list-style: none; padding-left: 0.3125rem; }
li { display: flex; gap: 0.625rem; margin-bottom: 0.5rem; }
a { color: var(--secondary); text-decoration: none; }
h2 { color: var(--text-1); margin-bottom: 0.5rem; }
h3 { color: var(--text-2); }
h4 { color: var(--text-2); }
p { color: var(--text-3); }

/* ── PROJECTS ── */
#s-downloads { overflow: hidden; }
.projects-container {
    flex: 1;
    display: flex;
    flex-direction: column;
    min-height: 0;
}
.proj-card {
    display: none;
    flex-direction: column;
    flex: 1;
    min-height: 0;
    border: 0.3rem solid var(--border);
    background-size: cover;
    background-position: center;
    position: relative;
    transition: border-color var(--transition);
}
.proj-card::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(to top, rgba(0,0,0,0.4) 40%, transparent 100%);
    z-index: 0;
}
.proj-card.active { display: flex; }
.proj-card:hover { border-color: var(--secondary); }
.proj-body {
    position: relative;
    z-index: 1;
    margin-top: auto;
    padding: 1rem;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}
.proj-body h2 { font-size: 2rem; margin-bottom: 0; color: #fff; }
.proj-body p  { font-size: 1.2rem; color: rgba(255,255,255,0.7); }
.proj-tags { display: flex; flex-wrap: wrap; gap: 0.4rem; }
.tag {
    border: 0.2rem solid rgba(255,255,255,0.4);
    padding: 0.1rem 0.5rem;
    color: rgba(255,255,255,0.8);
    font-size: 1rem;
}
.proj-links { margin-top: 0.25rem; display: flex; gap: 1rem; }
.proj-links a { color: var(--secondary); font-size: 1.2rem; }
.proj-links a:hover { color: var(--primary); }
.proj-controls {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 2rem;
    padding: 0.75rem 0 0;
    flex-shrink: 0;
}
.proj-controls button {
    background: var(--surface);
    border: 0.3rem solid var(--border);
    color: var(--text-1);
    font-family: "Tiny5", sans-serif;
    font-size: 1.5rem;
    padding: 0.2rem 1rem;
    cursor: pointer;
    transition: border-color var(--transition);
}
.proj-controls button:hover { border-color: var(--secondary); }
#proj-counter { color: var(--text-1); font-size: 1.2rem; }

/* ── MOBILE ── */
@media (max-width: 768px) {
    .site-title { font-size: clamp(2rem, 10vw, 6rem); }
    .snap-section > .section-label { font-size: clamp(1.8rem, 7vw, 3rem); }
    .snap-section { padding: 4rem 1rem 1rem; }
    #s-about {
        overflow-y: auto;
        -webkit-overflow-scrolling: touch;
        height: auto;
        min-height: 100dvh;
    }
    #s-about .section-content {
        overflow: visible;
        min-height: unset;
        flex: unset;
    }
}
/* ── OVERLAY ── */
#nav-overlay {
    position: fixed;
    inset: 0;
    z-index: 99;
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    background: rgba(0,0,0,0.3);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    pointer-events: none;
    transition: opacity var(--transition);
}
#nav-overlay.open {
    opacity: 1;
    pointer-events: all;
}
.nav-menu {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 2rem;
}
.nav-menu a {
    font-family: "Tiny5", sans-serif;
    font-size: 4rem;
    color: var(--text-1);
    text-decoration: none;
    transition: color var(--transition);
}
.nav-menu a:hover { color: var(--secondary); }

/* бургер → крестик */
.hdr-burger.active span:nth-child(1) {
    transform: translateY(10px) rotate(45deg);
}
.hdr-burger.active span:nth-child(2) {
    opacity: 0;
}
.hdr-burger.active span:nth-child(3) {
    transform: translateY(-10px) rotate(-45deg);
}
.hdr-burger span {
    transition: transform var(--transition), opacity var(--transition);
    transform-origin: center;
}