/* About page. Tokens, fonts, bar and the reveal system live in nerdicate.css; .hero and .label in site.css. */

.about-hero h1 { max-width: 15ch; }
.about-hero .hello { margin-top: 30px; color: var(--gold); font-size: clamp(1.2rem, 2vw, 1.7rem); }
.about-hero .lede { max-width: 56ch; margin-top: 16px; }
.about-hero .lede.soft { color: #98a6c6; font-size: clamp(1rem, 1.3vw, 1.2rem); }

.about {
    display: grid;
    gap: clamp(72px, 12svh, 140px);
    max-width: 1500px;
    margin: 0 auto;
    padding: 0 var(--gutter) clamp(70px, 12svh, 130px);
}

.about h2 { max-width: 16ch; font-size: clamp(2.1rem, 4.8vw, 4.6rem); }
.about .label { margin-bottom: 36px; }
.about .label.small { margin: clamp(48px, 8svh, 80px) 0 20px; }
.about .label.center { justify-content: center; }
.about .label.center::after { display: none; }

.txt { max-width: 60ch; margin-top: 1.1em; color: #c4cee6; font-size: clamp(1.02rem, 1.3vw, 1.2rem); line-height: 1.75; }
.txt.lead { margin-top: 22px; font-size: clamp(1.15rem, 1.8vw, 1.5rem); font-weight: 300; color: #d3dbef; }
h2 + .txt { margin-top: 28px; }

.curiosity { margin: 1.1em 0; color: var(--gold); font-size: clamp(1.5rem, 2.6vw, 2.4rem); font-weight: 300; letter-spacing: -.02em; line-height: 1.2; }

/* the one idea */
.idea {
    padding: clamp(28px, 5vw, 72px);
    border: 1px solid rgba(143, 156, 186, .18);
    border-left: 3px solid var(--gold);
    background: linear-gradient(110deg, rgba(47, 107, 255, .12), rgba(245, 184, 92, .06) 65%, transparent);
}

.idea p { max-width: 32em; font-size: clamp(1.45rem, 3vw, 2.7rem); font-weight: 300; line-height: 1.28; letter-spacing: -.025em; }

.idea em {
    font-style: normal;
    font-weight: 500;
    background: linear-gradient(100deg, var(--blue), #bfe0ff 45%, var(--gold));
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}

.split { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: clamp(32px, 5vw, 88px); align-items: start; }
.split.wide { margin-top: clamp(40px, 7svh, 72px); }
.split.wide .txt { margin-top: 0; }

/* behind every equation... */
.stack { display: grid; gap: 14px; }

.stack li {
    padding: clamp(20px, 2.4vw, 30px) clamp(22px, 2.8vw, 34px);
    border: 1px solid rgba(255, 255, 255, .08);
    border-left: 2px solid var(--c);
    background: rgba(6, 10, 22, .6);
    backdrop-filter: blur(6px);
}

.stack small { display: block; margin-bottom: 10px; color: var(--mute); font: 400 11px/1.4 var(--mono); letter-spacing: .24em; text-transform: uppercase; }
.stack strong { display: block; font-size: clamp(1.25rem, 2.1vw, 1.8rem); font-weight: 400; line-height: 1.25; letter-spacing: -.02em; }

/* mathematics, physics, computer science, AI */
.tiles4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px; margin-top: clamp(32px, 6svh, 56px); }

.tiles4 li {
    position: relative;
    display: grid;
    gap: 10px;
    align-content: start;
    padding: 28px 24px 32px;
    overflow: hidden;
    border: 1px solid rgba(255, 255, 255, .08);
    background: rgba(6, 10, 22, .6);
    transition: border-color .5s var(--ease), box-shadow .5s var(--ease), transform .5s var(--ease);
}

.tiles4 li::before { content: ""; position: absolute; inset: 0 0 auto; height: 2px; background: var(--c); box-shadow: 0 0 22px var(--c); }
.tiles4 li:hover { border-color: var(--c); box-shadow: 0 0 44px -14px var(--c); transform: translateY(-4px); }
.tiles4 .mark { color: var(--c); font: 300 2.6rem/1 var(--mono); }
.tiles4 strong { margin-top: 8px; font-size: clamp(1.2rem, 1.7vw, 1.55rem); font-weight: 500; letter-spacing: -.02em; line-height: 1.15; }
.tiles4 li span:last-child { color: #aab6d3; line-height: 1.5; }

.goal { margin-top: clamp(36px, 6svh, 60px); color: var(--gold); font-size: clamp(1.3rem, 2.2vw, 2rem); font-weight: 300; letter-spacing: -.02em; }

.chips { display: flex; flex-wrap: wrap; gap: 10px; }

.chips a {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 11px 20px;
    border: 1px solid rgba(143, 156, 186, .3);
    border-radius: 99px;
    color: #c4cee6;
    transition: border-color .3s, color .3s, box-shadow .3s;
}

.chips i { width: 8px; height: 8px; border-radius: 50%; background: var(--c); box-shadow: 0 0 10px var(--c); }
.chips a:hover { border-color: var(--c); color: #fff; box-shadow: 0 0 28px -8px var(--c); }

/* principles */
.principles { display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px; margin: clamp(32px, 6svh, 56px) 0; padding: 0; list-style: none; }

.principles li { display: grid; gap: 16px; align-content: start; padding: 26px 24px 30px; border-top: 1px solid var(--c); background: linear-gradient(to bottom, rgba(255, 255, 255, .04), transparent); }
.principles b { color: transparent; font: 300 3.2rem/1 var(--sans); letter-spacing: -.04em; -webkit-text-stroke: 1px var(--c); }
.principles span { font-size: clamp(1.05rem, 1.5vw, 1.3rem); line-height: 1.35; }

/* closing block */
.keep {
    padding: clamp(36px, 7vw, 100px) clamp(22px, 5vw, 80px);
    border: 1px solid rgba(245, 184, 92, .28);
    background:
        radial-gradient(70% 90% at 50% 0%, rgba(245, 184, 92, .12), transparent 70%),
        radial-gradient(60% 80% at 50% 100%, rgba(47, 107, 255, .14), transparent 70%),
        rgba(4, 8, 18, .7);
    text-align: center;
}

.keep h2 { margin: 0 auto; max-width: none; }
.keep .txt { margin-right: auto; margin-left: auto; }
.keep .welcome { margin-top: clamp(32px, 6svh, 56px); font-size: clamp(1.6rem, 3vw, 2.6rem); font-weight: 500; letter-spacing: -.02em; }
.keep .motto { margin-top: 14px; color: var(--gold); font: 400 12px/1.6 var(--mono); letter-spacing: .24em; text-transform: uppercase; }
.keep .actions { display: flex; flex-wrap: wrap; justify-content: center; gap: 14px; margin-top: clamp(28px, 5svh, 48px); }
.keep .cta { margin-top: 0; }
.keep .cta.ghost { color: var(--ink); border-color: rgba(143, 156, 186, .45); background: transparent; }
.keep .cta.ghost:hover { border-color: var(--gold); color: #fff; }
.keep .mail { margin-top: 32px; color: #aab6d3; }
.keep .mail a { color: var(--gold); border-bottom: 1px solid rgba(245, 184, 92, .5); overflow-wrap: anywhere; }
.keep .mail a:hover { border-bottom-color: var(--gold); }

@media (max-width: 1000px) {
    .split { grid-template-columns: 1fr; }
    .tiles4, .principles { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 560px) {
    .tiles4, .principles { grid-template-columns: 1fr; }
    .about .label { margin-bottom: 26px; }
}