/* simulai.tech - dark-mode / burnt-orange / z-pattern */

:root {
    --bg: #141210;
    --bg-deep: #0E0C0A;
    --surface: #1E1A18;
    --primary: #D4844A;      /* burnt orange */
    --secondary: #E8A44A;    /* ember amber */
    --accent: #B85A3A;       /* rust red */
    --text: #E8D8C4;         /* warm off-white */
    --text-muted: #8A7A68;   /* muted tan */
    --rule: rgba(212, 132, 74, 0.18);
    --glow: rgba(212, 132, 74, 0.08);
    --glow-hover: rgba(212, 132, 74, 0.15);

    --f-display: "Space Mono", ui-monospace, Menlo, monospace;
    --f-body: "Space Grotesk", Inter, system-ui, sans-serif;
    --f-code: "Fira Code", "Space Mono", ui-monospace, monospace;

    --ease: cubic-bezier(0.23, 1, 0.32, 1);
}

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

html, body {
    background: var(--bg);
    color: var(--text);
    font-family: var(--f-body);
    font-size: 16px;
    line-height: 1.75;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    overflow-x: hidden;
}

body {
    min-height: 100vh;
    position: relative;
}

/* -------- ambient backdrop -------- */
.lamp-glow {
    position: fixed;
    inset: 0;
    pointer-events: none;
    z-index: 0;
    background:
        radial-gradient(ellipse 60% 40% at 85% 10%, rgba(212,132,74,0.09), transparent 70%),
        radial-gradient(ellipse 50% 35% at 10% 90%, rgba(184,90,58,0.06), transparent 70%),
        radial-gradient(ellipse 70% 50% at 50% 50%, rgba(232,164,74,0.02), transparent 80%);
}

.grain {
    position: fixed;
    inset: 0;
    pointer-events: none;
    z-index: 1;
    opacity: 0.035;
    background-image:
        repeating-radial-gradient(circle at 0 0, rgba(232,216,196,0.3) 0 1px, transparent 1px 3px),
        repeating-radial-gradient(circle at 50% 50%, rgba(212,132,74,0.3) 0 1px, transparent 1px 4px);
    mix-blend-mode: overlay;
}

/* -------- terminal prompt -------- */
.terminal-prompt {
    position: fixed;
    top: 24px;
    left: 32px;
    font-family: var(--f-code);
    font-size: 13px;
    color: var(--primary);
    letter-spacing: 0.04em;
    z-index: 100;
    text-shadow: 0 0 12px rgba(212,132,74,0.4);
    transition: opacity 0.2s linear;
}
.terminal-prompt .tp-arrow { margin-right: 0.4em; color: var(--secondary); }
.terminal-prompt .tp-text { color: var(--text); }
.tp-cursor {
    display: inline-block;
    width: 0.5em;
    color: var(--primary);
    animation: blink 1s steps(2, end) infinite;
}
@keyframes blink { 0%, 50% { opacity: 1; } 50.01%, 100% { opacity: 0; } }

/* -------- stack -------- */
.stack {
    position: relative;
    z-index: 2;
    display: block;
}

/* -------- section base -------- */
.section {
    position: relative;
    min-height: 100vh;
    padding: 14vh 0 10vh;
    display: grid;
    align-items: center;
}

.section--left {
    grid-template-columns: minmax(0, 55fr) minmax(0, 45fr);
    padding-left: 8%;
    padding-right: 4%;
}
.section--right {
    grid-template-columns: minmax(0, 45fr) minmax(0, 55fr);
    padding-left: 4%;
    padding-right: 8%;
}

.chapter {
    position: absolute;
    top: 6vh;
    left: 8%;
    font-family: var(--f-code);
    font-size: 11px;
    letter-spacing: 0.3em;
    color: var(--text-muted);
    text-transform: uppercase;
}
.chapter--right {
    left: auto;
    right: 8%;
}

.content {
    max-width: 55vw;
    padding-right: 4vw;
}
.content--right {
    max-width: 55vw;
    padding-left: 4vw;
    text-align: right;
    justify-self: end;
}

.kicker {
    font-family: var(--f-code);
    font-size: 12px;
    color: var(--text-muted);
    letter-spacing: 0.12em;
    margin-bottom: 1.5rem;
    text-transform: lowercase;
}
.kicker .gt { color: var(--primary); opacity: 0.6; margin-right: 0.4em; }
.kicker--right { text-align: right; }

.h1 {
    font-family: var(--f-display);
    font-weight: 700;
    font-size: clamp(2.4rem, 5.5vw, 4.4rem);
    line-height: 1.05;
    letter-spacing: 0.04em;
    color: var(--text);
    margin-bottom: 1.4rem;
    display: inline-block;
    text-shadow: 0 0 24px rgba(212,132,74,0.12);
}
.h1 .amber { color: var(--primary); }

.h2 {
    font-family: var(--f-display);
    font-weight: 700;
    font-size: clamp(1.8rem, 3.5vw, 2.8rem);
    line-height: 1.15;
    letter-spacing: 0.03em;
    color: var(--text);
    margin-bottom: 1.2rem;
    display: inline-block;
}

.lede {
    font-family: var(--f-body);
    font-size: clamp(1.1rem, 1.5vw, 1.35rem);
    line-height: 1.55;
    color: var(--text);
    margin-bottom: 1.6rem;
    font-weight: 500;
}

.body {
    font-family: var(--f-body);
    font-size: 1rem;
    color: var(--text);
    margin-bottom: 1.2rem;
    max-width: 42em;
}
.content--right .body { margin-left: auto; }

.margin-note {
    font-family: var(--f-body);
    font-style: italic;
    font-size: 12px;
    color: var(--text-muted);
    margin-top: 2rem;
    letter-spacing: 0.02em;
}
.margin-note--right { text-align: right; }

/* -------- list -------- */
.list {
    list-style: none;
    margin: 1.5rem 0;
    font-family: var(--f-body);
    font-size: 0.98rem;
}
.list--right {
    text-align: right;
}
.list li {
    padding: 0.35rem 0;
    border-bottom: 1px dashed var(--rule);
    color: var(--text);
}
.list .bullet {
    font-family: var(--f-code);
    color: var(--primary);
    margin-right: 0.8em;
    font-size: 12px;
    letter-spacing: 0.05em;
}
.list--right .bullet { margin-right: 0; margin-left: 0.8em; float: right; }

/* -------- projects -------- */
.projects {
    display: grid;
    gap: 1rem;
    margin: 1.5rem 0;
}
.project {
    position: relative;
    padding: 1.2rem 1.4rem;
    background: var(--surface);
    border-left: 2px solid var(--primary);
    transition: transform 0.3s var(--ease), box-shadow 0.3s var(--ease), border-color 0.3s var(--ease);
    box-shadow: 0 0 40px var(--glow);
    overflow: hidden;
}
.project::after {
    content: "";
    position: absolute;
    top: 0; right: 0;
    width: 14px; height: 14px;
    background: linear-gradient(225deg, transparent 50%, var(--primary) 50%);
    opacity: 0.4;
}
.project:hover {
    border-left-color: var(--secondary);
    box-shadow: 0 0 60px var(--glow-hover);
}
.project__id {
    font-family: var(--f-code);
    font-size: 11px;
    color: var(--text-muted);
    letter-spacing: 0.12em;
    margin-bottom: 0.4rem;
}
.project__title {
    font-family: var(--f-display);
    font-weight: 700;
    font-size: 1.3rem;
    color: var(--primary);
    margin-bottom: 0.35rem;
    letter-spacing: 0.02em;
}
.project__meta {
    font-family: var(--f-code);
    font-size: 11px;
    color: var(--text-muted);
    margin-bottom: 0.6rem;
    letter-spacing: 0.04em;
}
.project__body {
    font-size: 0.95rem;
    color: var(--text);
}

/* -------- code fragments -------- */
.code-frag {
    position: absolute;
    background: var(--bg-deep);
    border: 1px solid var(--rule);
    padding: 1rem 1.2rem;
    font-family: var(--f-code);
    font-size: 12.5px;
    line-height: 1.7;
    color: var(--text);
    box-shadow: 0 0 40px var(--glow);
    transition: transform 0.3s var(--ease), box-shadow 0.3s var(--ease);
    backdrop-filter: blur(2px);
    mix-blend-mode: screen;
    border-radius: 2px;
    white-space: pre;
    overflow: hidden;
}
.code-frag:hover {
    box-shadow: 0 0 60px var(--glow-hover);
}
.code-frag code { font-family: inherit; }
.c-com { color: var(--text-muted); }
.c-key { color: var(--primary); }
.c-fn  { color: var(--secondary); }
.c-num { color: var(--accent); }
.c-op  { color: var(--text); opacity: 0.7; }

.code-frag--a { top: 12%; right: 4%; max-width: 360px; transform: rotate(-1.5deg); }
.code-frag--b { bottom: 14%; left: 4%; max-width: 320px; transform: rotate(2deg); }
.code-frag--c { top: 8%; right: 6%; max-width: 360px; transform: rotate(1deg); }
.code-frag--d { bottom: 10%; right: 8%; max-width: 320px; transform: rotate(-1deg); }

/* -------- collage -------- */
.collage {
    position: relative;
    height: 70vh;
    min-height: 500px;
    overflow: visible;
}

/* books */
.book {
    position: absolute;
    width: 40px;
    height: 200px;
    background: linear-gradient(90deg, #1a1512 0%, #221815 35%, #1a1512 70%, #0f0b09 100%);
    border: 1px solid rgba(212,132,74,0.3);
    border-radius: 2px 2px 0 0;
    box-shadow:
        inset 0 0 2px rgba(212,132,74,0.15),
        2px 2px 8px rgba(0,0,0,0.6);
}
.book::before {
    content: "";
    position: absolute;
    top: 15px; bottom: 15px;
    left: 6px; right: 6px;
    border-top: 1px solid rgba(212,132,74,0.35);
    border-bottom: 1px solid rgba(212,132,74,0.35);
}
.book-spine {
    position: absolute;
    top: 50%; left: 50%;
    transform: translate(-50%, -50%) rotate(-90deg);
    white-space: nowrap;
    font-family: var(--f-display);
    font-size: 9px;
    letter-spacing: 0.18em;
    color: var(--primary);
    text-transform: uppercase;
}

.book--1 { top: 14%; right: 18%; transform: rotate(3deg); }
.book--2 { top: 18%; right: 28%; transform: rotate(-1deg); height: 180px; }
.book--3 { top: 22%; right: 38%; transform: rotate(2deg); height: 190px; }
.book--4 { bottom: 8%; right: 12%; transform: rotate(-4deg); height: 180px; }
.book--5 { top: 10%; left: 10%; transform: rotate(-2deg); }
.book--6 { top: 14%; left: 20%; transform: rotate(1deg); height: 180px; }
.book--7 { bottom: 12%; left: 12%; transform: rotate(5deg); height: 190px; }

/* circuit svg */
.circuit {
    position: absolute;
    opacity: 0.65;
    mix-blend-mode: screen;
}
.circuit--a { bottom: 14%; right: 10%; width: 240px; }
.circuit--b { bottom: 12%; right: 16%; width: 260px; }
.circuit--c { top: 16%; left: 14%; width: 200px; }

/* waveform */
.waveform {
    position: absolute;
    top: 18%;
    left: 6%;
    width: 340px;
    opacity: 0.7;
    mix-blend-mode: screen;
}
.waveform svg { width: 100%; height: auto; display: block; }

/* scan-page */
.scan-page {
    position: absolute;
    top: 14%;
    left: 32%;
    width: 160px;
    padding: 16px 12px;
    background: rgba(30,26,24,0.6);
    border: 1px solid var(--rule);
    transform: rotate(2deg);
    mix-blend-mode: screen;
}
.scan-page--sm {
    top: auto;
    bottom: 10%;
    left: 38%;
    width: 130px;
    padding: 10px 10px;
    transform: rotate(-3deg);
}
.scan-line {
    height: 2px;
    background: var(--text-muted);
    opacity: 0.45;
    margin-bottom: 10px;
}
.scan-line--short { width: 60%; }
.scan-page__margin {
    font-family: var(--f-code);
    font-size: 10px;
    color: var(--primary);
    position: absolute;
    top: 6px;
    right: 8px;
    letter-spacing: 0.1em;
}

.wireframe {
    position: absolute;
    top: 20%;
    left: 16%;
    width: 280px;
    opacity: 0.7;
    mix-blend-mode: screen;
}

.corner-fold {
    position: absolute;
    top: 8%;
    right: 3%;
    width: 30px;
    height: 30px;
    background: linear-gradient(225deg, transparent 50%, var(--accent) 50%);
    opacity: 0.45;
}

/* -------- quote -------- */
.pull {
    position: relative;
    margin: 2rem 0 1rem;
    padding: 1.2rem 1.6rem;
    border-left: 2px solid var(--primary);
    font-family: var(--f-display);
    font-size: 1rem;
    color: var(--text);
    line-height: 1.5;
    background: linear-gradient(90deg, rgba(212,132,74,0.04), transparent);
    font-style: normal;
    letter-spacing: 0.02em;
}
.content--right .pull {
    border-left: none;
    border-right: 2px solid var(--primary);
    text-align: right;
    background: linear-gradient(270deg, rgba(212,132,74,0.04), transparent);
}
.pull .quote-mark {
    color: var(--primary);
    font-size: 1.8em;
    line-height: 0;
    margin-right: 0.2em;
    vertical-align: -0.3em;
}

/* -------- kv list -------- */
.kv {
    display: grid;
    grid-template-columns: 70px 1fr;
    gap: 0.7rem 1.4rem;
    font-family: var(--f-code);
    font-size: 13px;
    margin: 1.5rem 0 2rem;
    border-top: 1px dashed var(--rule);
    border-bottom: 1px dashed var(--rule);
    padding: 1rem 0;
}
.kv dt {
    color: var(--primary);
    letter-spacing: 0.1em;
    text-transform: uppercase;
    font-size: 11px;
    padding-top: 2px;
}
.kv dd {
    color: var(--text);
    transition: transform 0.3s var(--ease), color 0.3s var(--ease);
}
.kv dd:hover { color: var(--secondary); }

.outro {
    font-family: var(--f-code);
    font-size: 13px;
    color: var(--text-muted);
    margin-top: 2rem;
    letter-spacing: 0.04em;
}
.outro .gt { color: var(--primary); margin-right: 0.4em; }

/* -------- diagonal connectors -------- */
.connector {
    display: block;
    width: 100%;
    height: 160px;
    position: relative;
    z-index: 1;
    overflow: visible;
    opacity: 0.45;
}
.connector path {
    stroke-dasharray: 1200;
    stroke-dashoffset: 1200;
    transition: stroke-dashoffset 0.6s linear;
}
.connector.in-view path {
    stroke-dashoffset: 0;
}
.connector-dot {
    opacity: 0;
    transition: opacity 0.2s linear;
    filter: drop-shadow(0 0 6px rgba(212,132,74,0.7));
}
.connector.in-view .connector-dot {
    animation: dot-travel 0.6s linear forwards;
    opacity: 1;
}
@keyframes dot-travel {
    0%   { opacity: 1; }
    100% { opacity: 0; }
}
.connector--r2l .connector-dot {
    animation-name: dot-travel-r2l;
}
.connector--l2r .connector-dot {
    animation-name: dot-travel-l2r;
}
@keyframes dot-travel-r2l {
    0%   { cx: 80;  cy: 20;  opacity: 1; }
    100% { cx: 920; cy: 180; opacity: 0; }
}
@keyframes dot-travel-l2r {
    0%   { cx: 920; cy: 20;  opacity: 1; }
    100% { cx: 80;  cy: 180; opacity: 0; }
}

/* -------- magnetic flag (JS attaches .magnetic-active) -------- */
.magnetic {
    transition: transform 0.3s var(--ease);
    will-change: transform;
}

/* -------- reduce on small screens -------- */
@media (max-width: 900px) {
    .section--left, .section--right {
        grid-template-columns: 1fr;
        padding-left: 6%;
        padding-right: 6%;
    }
    .content, .content--right {
        max-width: 100%;
        padding: 0;
        text-align: left;
    }
    .content--right .body { margin-left: 0; }
    .list--right { text-align: left; }
    .list--right .bullet { float: none; margin-right: 0.8em; margin-left: 0; }
    .chapter--right { right: 6%; }
    .chapter { left: 6%; }
    .collage { height: 60vh; margin-top: 2rem; }
    .pull, .content--right .pull {
        border-left: 2px solid var(--primary);
        border-right: none;
        text-align: left;
        background: linear-gradient(90deg, rgba(212,132,74,0.04), transparent);
    }
    .kv { grid-template-columns: 56px 1fr; }
    .code-frag { max-width: 85%; }
    .connector { height: 80px; }
    .terminal-prompt { top: 14px; left: 14px; font-size: 11px; }
    .book { width: 28px; height: 140px; }
    .book-spine { font-size: 7px; }
}

@media (max-width: 600px) {
    .h1 { font-size: 2rem; }
    .h2 { font-size: 1.5rem; }
    .collage { height: 50vh; }
    .waveform, .circuit { width: 80% !important; }
}