/* =========================================================
   Bits & Bytes — Minimal Starter (with mobile drawer)
   - Modern, minimal, responsive
   - Light/Dark via prefers-color-scheme
   - Drawer patterns for mobile nav
   ========================================================= */

/* ---------- 1) Reset & base ---------- */
*, *::before, *::after { box-sizing: border-box; }
html, body { height: 100%; }
body {
  margin: 0;
  font-family: system-ui, -apple-system, Segoe UI, Roboto, Inter, "Helvetica Neue", Arial, "Apple Color Emoji", "Segoe UI Emoji";
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}
img, picture, svg, video { display: block; max-width: 100%; height: auto; }
a { color: inherit; text-decoration: none; }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; }

/* ---------- 2) Design tokens ---------- */
:root {
  --bg: #ffffff;
  --fg: #0b0b0c;
  --muted: #6b7280;
  --accent: #61adac;
  --card: #f4f4f5;
  --border: #e5e7eb;

  --radius: 14px;
  --shadow: 0 10px 25px rgba(0,0,0,.06);

  /* Fonts */
  --font-body: "Cantarell", system-ui, sans-serif;
  --font-heading: "Fira Code Retina", "Fira Code", monospace;

  /* Fluid type scale */
  --step--1: clamp(0.86rem, 0.83rem + 0.15vw, 0.94rem);
  --step-0:  clamp(1.00rem, 0.96rem + 0.30vw, 1.13rem);
  --step-1:  clamp(1.25rem, 1.13rem + 0.60vw, 1.50rem);
  --step-2:  clamp(1.56rem, 1.35rem + 1.05vw, 2.00rem);
  --step-3:  clamp(1.95rem, 1.61rem + 1.70vw, 2.66rem);
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #1e1e2e;
    --fg: #f4f4f5;
    --muted: #a1a1aa;
    --accent: #588887;
    --card: #141416;
    --border: #1f2937;
    --shadow: none;

  }
}

/* === Color utility classes (default = dark theme palette) === */
.tc01 { color: #c299ff; } /* lavender */
.tc02 { color: #89b4fa; } /* sky */
.tc03 { color: #ffa64d; } /* orange */
.tc04 { color: #99ff99; } /* green */
.tc05 { color: #f9e2af; } /* yellow */
.tc06 { color: #f38ba8; } /* pink */

/* === Light theme overrides === */
@media (prefers-color-scheme: light) {
  .tc01 { color: #6b21a8; } /* darker violet */
  .tc02 { color: #1d4ed8; } /* deep blue */
  .tc03 { color: #c2410c; } /* burnt orange */
  .tc04 { color: #15803d; } /* forest green */
  .tc05 { color: #92400e; } /* golden brown */
  .tc06 { color: #be123c; } /* crimson */
}

/* ---------- 3) Layout helpers ---------- */
body {
    background: var(--bg);
    color: var(--fg);
    font-family: var(--font-body);
    font-size: var(--step-0);
}
.container { width: min(1100px, 92vw); margin-inline: auto; }
.stack > * + * { margin-top: 1.2rem; }
.grid { display: grid; gap: 1rem; }
@media (min-width: 768px) {
  .grid-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .grid-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
.h2 { margin: 0; font-size: var(--step-2); }
.muted { color: var(--muted); }
.bullets { margin: 0; padding-left: 1rem; }

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
}

#features {
    text-align: center;
}

/* ---------- 4) Header & top nav ---------- */
header {
    position: sticky;
    top: 0;
    z-index: 30;
    backdrop-filter: saturate(180%) blur(12px);
    background: color-mix(in oklab, var(--card), transparent 20%);
    border-bottom: 1px solid var(--border);
}

.nav {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0.9rem 0;
}
.brand {
    display: inline-flex;
    align-items: center;
    gap: .6rem;
    font-weight: 700; letter-spacing: .2px; font-size: 1.5rem;
}
.brand-icon {
    width: 100px;
    height: 100px;
    border-radius: 8px;
    background: url("Media/logo_600x600.png") no-repeat center /contain;
}

/* Desktop links are hidden on small screens */
.nav-links { display: none; gap: .6rem; }
.cta {
    display: inline-flex;
    align-items: center;
    gap: .5rem;
    padding: .64rem .9rem;
    border-radius: calc(var(--radius) - 6px);
  border: 1px solid var(--border);
  background: color-mix(in oklab, var(--bg), var(--card) 30%);
  transition: transform .08s ease, background .2s ease;
  font-weight: 600;
}
.cta:hover { transform: translateY(-1px); }
.cta.primary {
  background: var(--accent); color: #fff;
  border-color: color-mix(in oklab, var(--accent), #000 15%);
}

/* Mobile hamburger button */
.menu-btn {
  appearance: none;
  border: 1px solid var(--border);
  background: color-mix(in oklab, var(--bg), var(--card) 30%);
  border-radius: 10px;
  padding: .5rem .7rem;
  display: inline-flex; gap: .5rem; align-items: center;
  font-weight: 600;
}
.menu-text { display: inline-block; }
.menu-icon {
  width: 22px; height: 2px; background: currentColor; position: relative; border-radius: 2px;
}
.menu-icon::before,
.menu-icon::after {
  content: ""; position: absolute; left: 0; right: 0; height: 2px; background: currentColor; border-radius: 2px;
}
.menu-icon::before { top: -6px; }
.menu-icon::after  { top:  6px; }

/* When used inside the close button, rotate bars into an "X" */
.menu-btn.close .menu-icon { transform: rotate(45deg); }
.menu-btn.close .menu-icon::before { transform: rotate(90deg); top: 0; }
.menu-btn.close .menu-icon::after  { display: none; }

/* On ≥768px show desktop links and hide hamburger */
@media (min-width: 768px) {
  .menu-btn { display: none; }
  .nav-links { display: flex; }
}

/* ---------- 5) Drawer + overlay ---------- */
/* Overlay blocks background and enables click-to-dismiss */
.overlay {
  position: fixed; inset: 0; background: rgba(0,0,0,.45);
  opacity: 0; pointer-events: none; transition: opacity .2s ease; z-index: 40;
}

/* Drawer panel slides from the left on mobile */
.drawer {
  position: fixed; inset: 0 auto 0 0; width: min(86vw, 340px);
  background: var(--bg); border-right: 1px solid var(--border);
  box-shadow: var(--shadow); transform: translateX(-100%);
  transition: transform .22s ease; z-index: 50; display: flex; flex-direction: column;
}

/* Drawer header */
.drawer-header {
  display: flex; align-items: center; justify-content: space-between;
  padding: .8rem 1rem; border-bottom: 1px solid var(--border);
}
.drawer-title { display: inline-flex; align-items: center; gap: .6rem; font-weight: 700; }

/* Drawer nav links */
.drawer-nav { display: flex; flex-direction: column; padding: 1rem; gap: .4rem; }
.drawer-nav a {
  padding: .9rem 1rem; border-radius: 10px; border: 1px solid transparent;
}
.drawer-nav a:hover {
  background: color-mix(in oklab, var(--bg), var(--card) 30%);
  border-color: var(--border);
}

/* Open state toggled via data attribute */
.drawer[data-open="true"] { transform: none; }
.overlay[data-open="true"] { opacity: 1; pointer-events: auto; }

/* ---------- 6) Sections (hero, cards, split) ---------- */
.hero { padding: 6rem 0 3rem; text-align: center; }
.hero h1 {
  font-size: var(--step-3); line-height: 1.1; letter-spacing: -0.02em; margin: 0 0 .8rem;
}
.hero p {
  color: var(--muted); font-size: var(--step-1); margin: 0 auto 1.6rem; max-width: 60ch;
}
.hero-actions { display: flex; gap: .8rem; justify-content: center; flex-wrap: wrap; }

.cards { padding: 2rem 0 3rem; }
.card {
  background: var(--card); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 1.2rem; box-shadow: var(--shadow);
  display: grid; gap: .5rem;
}
.card h3 { margin: 0; font-size: var(--step-1); }
.card p { margin: 0; color: var(--fg); font-size: var(--step--1); }

.split {
    padding: 0.5rem 0 0.5rem;
    align-items: center;
    display: grid;
    gap: 1rem;
    align-items: stretch;  /* 🔑 ensures children take full equal height */
}
.panel {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 1.2rem;
    box-shadow: var(--shadow);
    display: flex;          /* allows inner content to grow naturally */
    flex-direction: column; /* stack children */
}

/* ---------- 7) Footer ---------- */
footer {
  border-top: 1px solid var(--border); padding: 2rem 0 3rem;
  color: var(--muted); font-size: var(--step--1);
}

/* ---------- 8) Motion preference ---------- */
@media (prefers-reduced-motion: reduce) {
  * { animation: none !important; transition: none !important; }
}