/* smitchandarana.com: a "live control room". Calm panels, hairline rules, mono labels, Phoenix navy/royal/cyan. Light and dark follow the system; the toggle overrides. */
:root {
  --bg: #f2f6fb; --bg2: #e8eff8; --panel: #ffffff; --ink: #0b1f3d; --muted: #4b5f7d; --line: #d3deec;
  --royal: #1e5aa6; --cyan: #0f86c0; --glow: rgba(30, 90, 166, .16); --led: #1b8a4e; --warn: #9a5b00;
  --display: "Syne", "Segoe UI", system-ui, sans-serif; --body: "DM Sans", "Segoe UI", system-ui, sans-serif;
  --mono: "JetBrains Mono", ui-monospace, "SF Mono", Menlo, Consolas, monospace;
  --maxw: 1120px;
}
@media (prefers-color-scheme: dark) { :root:not([data-theme="light"]) {
  --bg: #07090d; --bg2: #0b0f16; --panel: #0e131c; --ink: #e9f0fb; --muted: #94a5bf; --line: #1f2937;
  --royal: #4f8ad6; --cyan: #2bb0ed; --glow: rgba(43, 176, 237, .14); --led: #3ddc84; --warn: #f0b45a; color-scheme: dark; } }
:root[data-theme="dark"] {
  --bg: #07090d; --bg2: #0b0f16; --panel: #0e131c; --ink: #e9f0fb; --muted: #94a5bf; --line: #1f2937;
  --royal: #4f8ad6; --cyan: #2bb0ed; --glow: rgba(43, 176, 237, .14); --led: #3ddc84; --warn: #f0b45a; color-scheme: dark; }

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; background: var(--bg); color: var(--ink); font: 17px/1.6 var(--body); -webkit-font-smoothing: antialiased; }
a { color: var(--cyan); text-underline-offset: 3px; }
a:hover { color: var(--royal); }
:focus-visible { outline: 2px solid var(--cyan); outline-offset: 3px; border-radius: 4px; }
h1, h2, h3 { font-family: var(--display); letter-spacing: -.025em; line-height: 1.08; margin: 0; text-wrap: balance; }
p { margin: 0; }
.wrap { width: 100%; max-width: var(--maxw); margin-inline: auto; padding-inline: 20px; }
.mono { font-family: var(--mono); }
.label { font: 600 .72rem/1 var(--mono); letter-spacing: .16em; text-transform: uppercase; color: var(--cyan); }
.skip { position: absolute; left: -999px; top: 8px; background: var(--panel); padding: 8px 12px; border-radius: 8px; z-index: 50; }
.skip:focus { left: 8px; }

/* ── top bar ── */
.bar { position: sticky; top: 0; z-index: 20; background: color-mix(in srgb, var(--bg) 86%, transparent); backdrop-filter: blur(10px); border-bottom: 1px solid var(--line); }
.bar .wrap { display: flex; align-items: center; justify-content: space-between; gap: 16px; min-height: 58px; }
.brand { font: 700 1.05rem var(--display); color: var(--ink); text-decoration: none; letter-spacing: -.02em; }
.brand b { color: var(--cyan); }
.nav { display: flex; gap: 20px; align-items: center; font-size: .92rem; }
.nav a { color: var(--muted); text-decoration: none; }
.nav a:hover { color: var(--ink); }
.btn { display: inline-flex; align-items: center; gap: 8px; padding: 11px 20px; border-radius: 10px; font: 600 .95rem var(--body); text-decoration: none; border: 1px solid var(--line); color: var(--ink); background: var(--panel); cursor: pointer; transition: transform .2s, border-color .2s, box-shadow .2s; }
.btn:hover { border-color: var(--cyan); color: var(--ink); transform: translateY(-1px); }
.btn.primary { background: var(--royal); border-color: var(--royal); color: #fff; box-shadow: 0 8px 28px -10px var(--glow); }
.btn.primary:hover { color: #fff; border-color: var(--cyan); box-shadow: 0 10px 34px -8px var(--cyan); }
.theme { width: 38px; height: 38px; padding: 0; justify-content: center; }
@media (max-width: 720px) { .nav a.hide-s { display: none; } }

/* ── hero ── */
.hero { position: relative; overflow: hidden; border-bottom: 1px solid var(--line); background:
  radial-gradient(60% 70% at 78% 0%, var(--glow), transparent 70%),
  linear-gradient(var(--line) 1px, transparent 1px) 0 0 / 100% 56px,
  linear-gradient(90deg, var(--line) 1px, transparent 1px) 0 0 / 56px 100%, var(--bg); background-blend-mode: normal; }
.hero::after { content: ""; position: absolute; inset: 0; background: linear-gradient(to bottom, transparent 55%, var(--bg)); pointer-events: none; }
.hero .wrap { position: relative; z-index: 1; padding-block: clamp(44px, 8vw, 96px) clamp(36px, 6vw, 64px); display: grid; gap: 28px; }
.hero h1 { font-size: clamp(2.4rem, 6.2vw, 4.6rem); max-width: 17ch; }
.hero h1 em { font-style: normal; color: var(--cyan); }
.hero .sub { max-width: 60ch; color: var(--muted); font-size: clamp(1.05rem, 1.6vw, 1.2rem); }
.cta { display: flex; flex-wrap: wrap; gap: 12px; }
.status { display: flex; flex-wrap: wrap; gap: 10px 22px; align-items: center; font: 500 .78rem var(--mono); color: var(--muted); }
.led { display: inline-block; width: 8px; height: 8px; border-radius: 50%; background: var(--led); box-shadow: 0 0 0 0 var(--led); animation: pulse 2.4s infinite; vertical-align: 1px; margin-right: 8px; }
@keyframes pulse { 0% { box-shadow: 0 0 0 0 color-mix(in srgb, var(--led) 60%, transparent); } 70%, 100% { box-shadow: 0 0 0 9px transparent; } }

.hero-art { position: absolute; right: 24px; top: 70px; width: 330px; height: auto; display: none; }
.flowline { animation: dash 2.2s linear infinite; }
@keyframes dash { to { stroke-dashoffset: -20; } }
@media (min-width: 1120px) { .hero-art { display: block; } }
/* ── control room tiles ── */
.room { display: grid; grid-template-columns: repeat(auto-fit, minmax(210px, 1fr)); gap: 1px; background: var(--line); border: 1px solid var(--line); border-radius: 16px; overflow: hidden; margin-top: 8px; }
.tile { background: var(--panel); padding: 20px 22px; display: grid; gap: 6px; }
.tile .n { font: 700 clamp(2rem, 4vw, 2.8rem)/1 var(--display); letter-spacing: -.03em; font-variant-numeric: tabular-nums; }
.tile .t { font-size: .92rem; color: var(--ink); }
.tile .s { font: 500 .7rem var(--mono); color: var(--muted); letter-spacing: .04em; }
.source { font: 500 .72rem var(--mono); color: var(--muted); display: flex; flex-wrap: wrap; gap: 6px 16px; margin-top: 12px; }

/* ── sections ── */
section { padding-block: clamp(52px, 8vw, 96px); border-bottom: 1px solid var(--line); }
section:nth-of-type(even) { background: var(--bg2); }
.head { display: grid; gap: 14px; margin-bottom: 36px; max-width: 760px; }
.head h2 { font-size: clamp(1.8rem, 4vw, 2.9rem); }
.head p { color: var(--muted); }

/* ── workflow ── */
.flow { display: grid; grid-template-columns: 1.15fr 1fr; gap: 24px; align-items: start; }
@media (max-width: 860px) { .flow { grid-template-columns: 1fr; } }
.rail { display: grid; gap: 10px; counter-reset: step; position: relative; }
.node { all: unset; box-sizing: border-box; cursor: pointer; display: grid; grid-template-columns: 44px 1fr; gap: 14px; align-items: center; padding: 14px 16px; border: 1px solid var(--line); border-radius: 14px; background: var(--panel); transition: border-color .25s, transform .25s, box-shadow .25s; position: relative; }
.node:hover { border-color: var(--cyan); }
.node:focus-visible { outline: 2px solid var(--cyan); outline-offset: 2px; }
.node .ic { width: 44px; height: 44px; border-radius: 12px; display: grid; place-items: center; font: 700 .85rem var(--mono); color: var(--cyan); background: var(--bg2); border: 1px solid var(--line); }
.node strong { display: block; font: 700 1.05rem var(--display); letter-spacing: -.01em; }
.node span.d { color: var(--muted); font-size: .88rem; }
.node[aria-pressed="true"] { border-color: var(--cyan); box-shadow: 0 14px 40px -22px var(--cyan); transform: translateX(4px); }
.node[aria-pressed="true"] .ic { background: var(--royal); color: #fff; border-color: var(--royal); }
.node.human .ic { color: var(--warn); }
.node.human[aria-pressed="true"] .ic { background: var(--warn); color: #07090d; border-color: var(--warn); }
.term { background: #05070b; color: #cfe3ff; border: 1px solid #1f2937; border-radius: 16px; overflow: hidden; font: 500 .8rem/1.75 var(--mono); position: sticky; top: 76px; }
.term header { display: flex; justify-content: space-between; gap: 12px; padding: 10px 14px; border-bottom: 1px solid #1f2937; color: #8aa0c0; font-size: .7rem; letter-spacing: .08em; text-transform: uppercase; }
.term ol { list-style: none; margin: 0; padding: 14px; display: grid; gap: 2px; min-height: 236px; }
.term li { display: grid; grid-template-columns: 62px 74px 1fr; gap: 8px; opacity: .38; transition: opacity .4s; }
.term li.on { opacity: 1; }
.term li .tm { color: #61738f; }
.term li .rl { color: #2bb0ed; }
.term li.human .rl { color: #f0b45a; }
.term footer { padding: 10px 14px; border-top: 1px solid #1f2937; color: #8aa0c0; font-size: .72rem; }
@media (max-width: 480px) { .term li { grid-template-columns: 54px 1fr; } .term li .rl { display: none; } }
.rule { margin-top: 22px; padding: 14px 18px; border-left: 3px solid var(--warn); background: var(--panel); border-radius: 0 12px 12px 0; font-size: .95rem; max-width: 70ch; }

/* ── cards ── */
.grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 16px; }
.card { background: var(--panel); border: 1px solid var(--line); border-radius: 16px; padding: 24px; display: grid; gap: 10px; align-content: start; transition: border-color .25s, transform .25s; }
.card:hover { border-color: var(--cyan); transform: translateY(-2px); }
.card h3 { font-size: 1.25rem; }
.card p { color: var(--muted); font-size: .95rem; }
.card .meta { font: 500 .72rem var(--mono); color: var(--cyan); letter-spacing: .06em; text-transform: uppercase; }
.card a.more { font-size: .9rem; font-weight: 600; text-decoration: none; }

/* ── proof ── */
.proof { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 16px; }
.proof .p { border-top: 2px solid var(--royal); padding-top: 14px; display: grid; gap: 6px; }
.proof .big { font: 700 clamp(2.2rem, 5vw, 3.4rem)/1 var(--display); letter-spacing: -.035em; color: var(--ink); }
.proof .big small { font-size: .5em; color: var(--cyan); margin-left: 2px; }
.proof p { color: var(--muted); font-size: .95rem; }
.clients { margin-top: 28px; padding: 16px 20px; border: 1px solid var(--line); border-radius: 14px; background: var(--panel); max-width: 80ch; }

/* ── roi ── */
.roi { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; background: var(--panel); border: 1px solid var(--line); border-radius: 18px; padding: clamp(20px, 3vw, 32px); }
@media (max-width: 760px) { .roi { grid-template-columns: 1fr; } }
.roi form { display: grid; gap: 16px; }
.roi label { display: grid; gap: 6px; font-size: .9rem; color: var(--muted); }
.roi input[type=range] { width: 100%; accent-color: var(--royal); }
.roi .v { font: 600 1rem var(--mono); color: var(--ink); }
.roi input[type=number] { font: 600 1rem var(--mono); padding: 10px 12px; border: 1px solid var(--line); border-radius: 10px; background: var(--bg); color: var(--ink); width: 100%; }
.out { display: grid; gap: 14px; align-content: center; }
.out .num { font: 700 clamp(2.4rem, 6vw, 3.6rem)/1 var(--display); letter-spacing: -.035em; color: var(--cyan); font-variant-numeric: tabular-nums; }
.out .note { font-size: .82rem; color: var(--muted); }

/* ── timeline, chips, faq ── */
.tl { list-style: none; margin: 0; padding: 0; display: grid; gap: 0; border-left: 1px solid var(--line); margin-left: 6px; max-width: 760px; }
.tl li { position: relative; padding: 0 0 26px 26px; display: grid; gap: 2px; }
.tl li::before { content: ""; position: absolute; left: -5px; top: 8px; width: 9px; height: 9px; border-radius: 50%; background: var(--cyan); }
.tl .y { font: 600 .74rem var(--mono); color: var(--cyan); letter-spacing: .08em; }
.tl b { font: 700 1.05rem var(--display); }
.tl span.d { color: var(--muted); font-size: .92rem; }
.chips { display: flex; flex-wrap: wrap; gap: 8px; padding: 0; margin: 0; list-style: none; }
.chips li { font: 500 .8rem var(--mono); padding: 7px 12px; border: 1px solid var(--line); border-radius: 99px; background: var(--panel); }
.two { display: grid; grid-template-columns: 1fr 1fr; gap: 40px; }
@media (max-width: 860px) { .two { grid-template-columns: 1fr; } }
details { border-bottom: 1px solid var(--line); padding: 16px 0; max-width: 820px; }
summary { cursor: pointer; font: 700 1.1rem var(--display); letter-spacing: -.01em; list-style: none; display: flex; justify-content: space-between; gap: 16px; }
summary::after { content: "+"; color: var(--cyan); font: 500 1.4rem var(--mono); }
details[open] summary::after { content: "−"; }
details p { color: var(--muted); margin-top: 10px; max-width: 70ch; }

/* ── contact / footer ── */
.final { text-align: left; display: grid; gap: 22px; max-width: 760px; }
.final h2 { font-size: clamp(2rem, 5vw, 3.3rem); }
footer.site { padding-block: 40px 56px; color: var(--muted); font-size: .9rem; }
footer.site .wrap { display: grid; gap: 18px; }
footer.site .links { display: flex; flex-wrap: wrap; gap: 8px 22px; font-family: var(--mono); font-size: .8rem; }
.doc { max-width: 780px; display: grid; gap: 18px; }
.doc pre { background: #05070b; color: #cfe3ff; border-radius: 12px; padding: 16px; overflow-x: auto; font: 500 .82rem/1.7 var(--mono); border: 1px solid #1f2937; }
.doc table { width: 100%; border-collapse: collapse; font-size: .92rem; }
.doc th, .doc td { text-align: left; padding: 10px 12px; border-bottom: 1px solid var(--line); vertical-align: top; }
.doc th { font: 600 .72rem var(--mono); letter-spacing: .1em; text-transform: uppercase; color: var(--muted); }
.tw { overflow-x: auto; }

@media (prefers-reduced-motion: reduce) { * { animation: none !important; transition: none !important; scroll-behavior: auto !important; } }
@media print { .bar, .term { display: none; } }