/* This file is part of Stratagram: https://github.com/shinsterneck/stratagram
 * Copyright 2026 Shin Sterneck. Licensed under the Apache License, Version 2.0 (see LICENSE).
 * SPDX-License-Identifier: Apache-2.0 */

/* Stratagram's homepage: dark, blueprint-like, the screenshots in light
   window frames. No web fonts, no frameworks. */

:root {
    --bg: #070b16;
    --bg-2: #0c1222;
    --panel: #10182c;
    --panel-2: #151f37;
    --line: #22304f;
    --line-soft: #1a2541;
    --text: #e6ecf7;
    --muted: #93a2bf;
    --faint: #63728f;
    --accent: #38bdf8;
    --accent-2: #2dd4bf;
    --accent-3: #a78bfa;
    --warm: #fbbf24;
    --radius: 14px;
    --sans: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, "Noto Sans", Ubuntu, Cantarell, sans-serif;
    --mono: ui-monospace, "JetBrains Mono", "SFMono-Regular", Menlo, Consolas, "Liberation Mono", monospace;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
    margin: 0;
    background: var(--bg);
    color: var(--text);
    font: 16px/1.6 var(--sans);
    -webkit-font-smoothing: antialiased;
}

/* The blueprint grid behind everything, fading out downwards. */
body::before {
    content: "";
    position: fixed;
    inset: 0;
    z-index: -1;
    background-image:
        linear-gradient(var(--line-soft) 1px, transparent 1px),
        linear-gradient(90deg, var(--line-soft) 1px, transparent 1px);
    background-size: 40px 40px;
    mask-image: radial-gradient(ellipse 90% 60% at 50% 0%, #000 30%, transparent 80%);
    -webkit-mask-image: radial-gradient(ellipse 90% 60% at 50% 0%, #000 30%, transparent 80%);
    opacity: 0.55;
}

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

img { max-width: 100%; height: auto; display: block; }

code, pre, kbd { font-family: var(--mono); }
code { font-size: 0.9em; color: #c8e7ff; background: #0f1c33; padding: 0.1em 0.4em; border-radius: 5px; border: 1px solid var(--line-soft); }
kbd { font-size: 0.82em; padding: 0.1em 0.45em; border-radius: 5px; border: 1px solid var(--line); border-bottom-width: 2px; background: var(--panel); color: var(--text); }

.wrap { width: min(1180px, 100% - 32px); margin: 0 auto; }

/* top bar */

.top {
    position: sticky;
    top: 0;
    z-index: 10;
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    background: rgba(7, 11, 22, 0.78);
    border-bottom: 1px solid var(--line-soft);
}
.top .wrap { display: flex; align-items: center; gap: 24px; height: 62px; }
.brand { display: flex; align-items: center; gap: 10px; color: var(--text); font-weight: 700; letter-spacing: 0.01em; font-size: 18px; }
.brand:hover { text-decoration: none; }
.brand img { width: 30px; height: 30px; }
.tabs { display: flex; gap: 4px; padding: 4px; border-radius: 999px; background: var(--panel); border: 1px solid var(--line-soft); }
.tabs a {
    padding: 6px 16px;
    border-radius: 999px;
    color: var(--muted);
    font-size: 14px;
    font-weight: 600;
    white-space: nowrap;
}
.tabs a:hover { color: var(--text); text-decoration: none; }
.tabs a.on { background: linear-gradient(135deg, #0e3a5c, #134e4a); color: #fff; box-shadow: inset 0 0 0 1px #1f6b8f; }
.top .spacer { flex: 1; }
.top .links { display: flex; gap: 18px; font-size: 14px; }
.top .links a { color: var(--muted); }
.top .links a:hover { color: var(--text); }

/* hero */

.hero { padding: 84px 0 40px; text-align: center; }
.eyebrow {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font: 600 12px/1 var(--mono);
    letter-spacing: 0.14em;
    text-transform: uppercase;
    color: var(--accent-2);
    padding: 7px 12px;
    border: 1px solid #1d4f53;
    border-radius: 999px;
    background: rgba(45, 212, 191, 0.07);
}
.eyebrow .dot { width: 7px; height: 7px; border-radius: 50%; background: var(--accent-2); box-shadow: 0 0 10px var(--accent-2); }
.hero h1 {
    margin: 22px auto 16px;
    font-size: clamp(36px, 6vw, 66px);
    line-height: 1.05;
    letter-spacing: -0.025em;
    max-width: 15ch;
}
.grad { background: linear-gradient(100deg, var(--accent) 0%, var(--accent-2) 55%, var(--accent-3) 100%); -webkit-background-clip: text; background-clip: text; color: transparent; }
.hero p.lead { margin: 0 auto; max-width: 64ch; font-size: clamp(17px, 2vw, 20px); color: var(--muted); }
.cta { display: flex; flex-wrap: wrap; justify-content: center; gap: 12px; margin: 32px 0 8px; }
.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 12px 20px;
    border-radius: 10px;
    font-weight: 650;
    font-size: 15px;
    border: 1px solid var(--line);
    color: var(--text);
    background: var(--panel);
}
.btn:hover { text-decoration: none; border-color: #35507f; background: var(--panel-2); }
.btn.primary { background: linear-gradient(135deg, #0ea5e9, #14b8a6); border-color: transparent; color: #04121f; }
.btn.primary:hover { filter: brightness(1.08); }
.facts { display: flex; flex-wrap: wrap; justify-content: center; gap: 10px 26px; margin-top: 22px; color: var(--faint); font: 13px var(--mono); }
.facts span::before { content: "▸ "; color: var(--accent); }

/* A screenshot in a window frame. */
.window {
    margin: 48px auto 0;
    border-radius: var(--radius);
    background: var(--panel);
    border: 1px solid var(--line);
    box-shadow: 0 40px 120px -30px rgba(14, 165, 233, 0.35), 0 20px 60px -20px rgba(0, 0, 0, 0.8);
    overflow: hidden;
}
.window .bar { display: flex; align-items: center; gap: 7px; padding: 11px 14px; border-bottom: 1px solid var(--line); background: var(--panel-2); }
.window .bar i { width: 11px; height: 11px; border-radius: 50%; background: #334155; }
.window .bar i:nth-child(1) { background: #f87171; }
.window .bar i:nth-child(2) { background: #fbbf24; }
.window .bar i:nth-child(3) { background: #34d399; }
.window .bar span { margin-left: 10px; font: 12px var(--mono); color: var(--faint); }
.window a { display: block; background: #fff; }
.caption { margin: 12px 0 0; font-size: 13px; color: var(--faint); text-align: center; }

/* sections */

section { padding: 72px 0; }
.kicker { font: 600 12px/1 var(--mono); letter-spacing: 0.16em; text-transform: uppercase; color: var(--accent); }
h2 { margin: 12px 0 14px; font-size: clamp(28px, 3.6vw, 40px); line-height: 1.15; letter-spacing: -0.02em; }
h3 { margin: 0 0 8px; font-size: 19px; letter-spacing: -0.01em; }
.section-lead { max-width: 70ch; color: var(--muted); font-size: 17px; margin: 0; }
.center { text-align: center; }
.center .section-lead { margin: 0 auto; }

/* The three ideas behind it. */
.pillars { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; margin-top: 40px; }
.card {
    position: relative;
    padding: 26px;
    border-radius: var(--radius);
    background: linear-gradient(180deg, var(--panel), var(--bg-2));
    border: 1px solid var(--line-soft);
}
.card .icon {
    width: 42px;
    height: 42px;
    display: grid;
    place-items: center;
    border-radius: 10px;
    margin-bottom: 16px;
    font: 700 18px var(--mono);
    color: #04121f;
    background: linear-gradient(135deg, var(--accent), var(--accent-2));
}
.card:nth-child(2) .icon { background: linear-gradient(135deg, var(--accent-2), #4ade80); }
.card:nth-child(3) .icon { background: linear-gradient(135deg, var(--accent-3), var(--accent)); }
.card p { margin: 0; color: var(--muted); }

/* A feature: text beside its screenshot, every other one mirrored. */
.feature { display: grid; grid-template-columns: 5fr 7fr; gap: 48px; align-items: center; }
.feature + .feature { margin-top: 96px; }
.feature.flip { grid-template-columns: 7fr 5fr; }
.feature.flip .text { order: 2; }
.feature ul { list-style: none; padding: 0; margin: 18px 0 0; }
.feature li { position: relative; padding-left: 26px; margin: 10px 0; color: var(--muted); }
.feature li::before { content: ""; position: absolute; left: 4px; top: 0.6em; width: 9px; height: 9px; border-radius: 2px; border: 2px solid var(--accent-2); transform: rotate(45deg); }
.feature li b { color: var(--text); font-weight: 600; }
.shot {
    border-radius: 12px;
    overflow: hidden;
    border: 1px solid var(--line);
    background: #fff;
    box-shadow: 0 24px 70px -28px rgba(0, 0, 0, 0.9);
}
.shot a { display: block; }
.shot.dark { background: var(--panel); }
.pair { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
.pair.lean { grid-template-columns: 2fr 5fr; }
.pair figure { margin: 0; }
.pair figcaption { margin-top: 8px; font: 12px var(--mono); color: var(--faint); text-align: center; }
.stack { display: grid; gap: 18px; }
.stack figure { margin: 0; }
figure.shot figcaption { margin: 0; padding: 8px 10px; font: 12px var(--mono); color: var(--faint); text-align: center; background: var(--panel); border-top: 1px solid var(--line); }
.themes .switch { display: flex; justify-content: center; gap: 4px; width: max-content; margin: 0 auto 14px; padding: 4px; border-radius: 999px; background: var(--panel); border: 1px solid var(--line-soft); }
.themes .switch button { font: 600 13px var(--sans, inherit); padding: 6px 16px; border: 0; border-radius: 999px; background: none; color: var(--muted); cursor: pointer; }
.themes .switch button:hover { color: var(--text); }
.themes .switch button.on { background: linear-gradient(135deg, #0e3a5c, #134e4a); color: #fff; box-shadow: inset 0 0 0 1px #1f6b8f; }
.themes .shot { background: #0b1220; }
.tag { display: inline-block; font: 600 11px var(--mono); padding: 3px 8px; border-radius: 6px; margin: 0 4px 6px 0; color: #bfe7ff; background: #0f2440; border: 1px solid #1b3a63; }

/* A terminal. */
.term {
    border-radius: 12px;
    border: 1px solid var(--line);
    background: #050913;
    overflow: hidden;
    box-shadow: 0 24px 70px -28px rgba(0, 0, 0, 0.9);
}
.term .bar { padding: 9px 14px; border-bottom: 1px solid var(--line-soft); font: 12px var(--mono); color: var(--faint); background: #0a1020; }
.term pre { margin: 0; padding: 18px 20px; overflow-x: auto; font-size: 13.5px; line-height: 1.7; color: #cbd5e1; }
.term .c { color: #64748b; }
.term .p { color: var(--accent-2); }
.term .s { color: var(--warm); }

/* Where it runs. */
.runs { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; margin-top: 40px; }
.runs .card h3 { display: flex; align-items: center; gap: 10px; }
.runs .card .label { font: 600 11px var(--mono); color: var(--accent-2); letter-spacing: 0.1em; text-transform: uppercase; }

/* Steps of an installation. */
.steps { counter-reset: step; display: grid; gap: 18px; margin-top: 36px; }
.step { display: grid; grid-template-columns: 44px 1fr; gap: 18px; align-items: start; }
.step::before {
    counter-increment: step;
    content: counter(step);
    width: 44px;
    height: 44px;
    display: grid;
    place-items: center;
    border-radius: 12px;
    font: 700 16px var(--mono);
    color: var(--accent);
    border: 1px solid #1f4a6b;
    background: #0b1a2e;
}
.step h3 { margin-top: 9px; }
.step p { margin: 4px 0 10px; color: var(--muted); }

.divider { height: 1px; background: linear-gradient(90deg, transparent, var(--line), transparent); }

.note {
    margin-top: 26px;
    padding: 16px 18px;
    border-radius: 12px;
    border: 1px solid #3b3115;
    background: rgba(251, 191, 36, 0.06);
    color: #e8d9a8;
    font-size: 14px;
}

footer { padding: 48px 0 64px; color: var(--faint); font-size: 14px; border-top: 1px solid var(--line-soft); }
footer .wrap { display: flex; flex-wrap: wrap; gap: 12px 28px; align-items: center; }
footer .grow { flex: 1; }

/* Tabs: with script, one page at a time; without, both one after the other. */
.js .page { display: none; }
.js .page.on { display: block; }

/* narrow screens */

@media (max-width: 900px) {
    .pillars, .runs { grid-template-columns: 1fr; }
    .feature, .feature.flip { grid-template-columns: 1fr; gap: 26px; }
    .feature.flip .text { order: 0; }
    .feature + .feature { margin-top: 72px; }
    .top .links { display: none; }
}
@media (max-width: 560px) {
    .top .wrap { gap: 12px; }
    .brand span { display: none; }
    .tabs a { padding: 6px 12px; font-size: 13px; }
    .hero { padding-top: 56px; }
    .pair, .pair.lean { grid-template-columns: 1fr; }
    section { padding: 56px 0; }
}