:root {
  --paper:      #F4F7F1;
  --paper-dim:  #EBEFE7;
  --ink:        #12171B;
  --ink-soft:   #5B6660;
  --green:      #1FAE6B;
  --green-dark: #158A56;
  --magenta:    #FF3E7F;
  --mat:        #DDE5DC;
  --checker-a:  #12171B;
  --checker-b:  #2A3430;
  --radius:     16px;
  --radius-sm:  10px;
  --font-display: 'Space Grotesk', 'Arial', sans-serif;
  --font-body: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-mono: 'IBM Plex Mono', 'Courier New', monospace;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: var(--font-body);
  background: var(--paper);
  color: var(--ink);
  line-height: 1.6;
}

.container { max-width: 960px; margin: 0 auto; padding: 0 24px; }

a { color: inherit; }

/* ---------- Header ---------- */
.site-header {
  border-bottom: 1px solid var(--mat);
  padding: 18px 0;
  position: sticky;
  top: 0;
  background: rgba(244,247,241,0.9);
  backdrop-filter: blur(6px);
  z-index: 10;
}
.header-inner { display: flex; justify-content: space-between; align-items: center; }
.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 19px;
  letter-spacing: -0.01em;
  text-decoration: none;
  color: var(--ink);
  cursor: pointer;
}
.logo img { width: 30px; height: 30px; border-radius: 7px; display: block; }
.logo .bg-chip {
  background: var(--green);
  color: var(--paper);
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 600;
  padding: 2px 7px;
  border-radius: 6px;
  margin: 0 1px;
}
nav a {
  color: var(--ink-soft);
  text-decoration: none;
  margin-left: 26px;
  font-size: 14px;
  font-weight: 500;
}
nav a:hover { color: var(--ink); }

/* ---------- Hero ---------- */
.hero { padding: 72px 0 48px; }
.hero-solo {
  max-width: 640px;
  text-align: center;
  margin: 0 auto;
}
.eyebrow {
  font-family: var(--font-mono);
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--green-dark);
  margin: 0 0 14px;
  display: block;
}
.hero h1 {
  font-family: var(--font-display);
  font-size: clamp(34px, 4.4vw, 50px);
  line-height: 1.06;
  letter-spacing: -0.01em;
  margin: 0 0 18px;
}
.hero h1 .accent { color: var(--green-dark); }
.subtitle {
  color: var(--ink-soft);
  font-size: 17px;
  margin: 0 auto 30px;
  max-width: 46ch;
}
.hero-ctas { display: flex; align-items: center; justify-content: center; gap: 16px; flex-wrap: wrap; }
.meta-note {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--ink-soft);
}

/* ---------- Buttons ---------- */
.btn-primary, .btn-secondary {
  border: none;
  padding: 13px 24px;
  border-radius: 10px;
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  font-family: var(--font-body);
}
.btn-primary { background: var(--ink); color: var(--paper); }
.btn-primary:hover { background: var(--green-dark); }
.btn-secondary { background: transparent; color: var(--ink); border: 1.5px solid var(--mat); }
.btn-secondary:hover { border-color: var(--ink); }

/* ---------- Cutting mat / dropzone ---------- */
.mat-section { padding: 8px 0 56px; }
.cutting-mat {
  position: relative;
  border-radius: var(--radius);
  padding: 52px 24px;
  background: var(--paper-dim);
  border: 1.5px solid var(--mat);
  cursor: pointer;
  text-align: center;
  transition: background 0.2s;
}
.cutting-mat::before,
.cutting-mat::after,
.reg-corner {
  content: "";
}
.reg-mark {
  position: absolute;
  width: 18px;
  height: 18px;
  opacity: 0.55;
}
.reg-mark svg { width: 100%; height: 100%; }
.reg-tl { top: 10px; left: 10px; }
.reg-tr { top: 10px; right: 10px; }
.reg-bl { bottom: 10px; left: 10px; }
.reg-br { bottom: 10px; right: 10px; }

.marching-frame { display: none; }

.cutting-mat::after {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: inherit;
  pointer-events: none;
  background-image:
    linear-gradient(90deg, var(--ink) 50%, transparent 50%),
    linear-gradient(90deg, var(--ink) 50%, transparent 50%),
    linear-gradient(0deg, var(--ink) 50%, transparent 50%),
    linear-gradient(0deg, var(--ink) 50%, transparent 50%);
  background-size: 16px 2px, 16px 2px, 2px 16px, 2px 16px;
  background-position: 0 0, 0 100%, 0 0, 100% 0;
  background-repeat: repeat-x, repeat-x, repeat-y, repeat-y;
  animation: march 0.6s linear infinite;
}
@keyframes march {
  to { background-position: 16px 0, -16px 100%, 0 16px, 100% -16px; }
}

.cutting-mat:hover { background: #E3EAE0; }
.cutting-mat .drop-icon { color: var(--green-dark); margin-bottom: 14px; }
.cutting-mat p { margin: 0 0 6px; font-size: 16px; }
.cutting-mat .hint {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--ink-soft);
}

.status {
  margin-top: 18px;
  padding: 13px 18px;
  border-radius: 10px;
  background: var(--paper-dim);
  border: 1px solid var(--mat);
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--ink-soft);
}
.status.error { color: var(--magenta); border-color: var(--magenta); background: #FFF0F5; }

/* Results */
.result-area { margin-top: 28px; }
.preview-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; text-align: left; }
.preview-box {
  background: var(--paper-dim);
  border: 1px solid var(--mat);
  border-radius: var(--radius-sm);
  padding: 12px;
}
.preview-label {
  display: block;
  font-family: var(--font-mono);
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--ink-soft);
  margin-bottom: 8px;
}
.preview-box img { width: 100%; border-radius: 7px; display: block; }
.checkerboard img {
  background-image:
    linear-gradient(45deg, #cfd6cc 25%, transparent 25%),
    linear-gradient(-45deg, #cfd6cc 25%, transparent 25%),
    linear-gradient(45deg, transparent 75%, #cfd6cc 75%),
    linear-gradient(-45deg, transparent 75%, #cfd6cc 75%);
  background-color: #fff;
  background-size: 18px 18px;
  background-position: 0 0, 0 9px, 9px -9px, -9px 0px;
}
.actions { margin-top: 20px; display: flex; gap: 12px; justify-content: center; }

/* Ad slot */
.ad-slot { min-height: 90px; margin: 8px auto 40px; }

/* ---------- Info sections ---------- */
.info-section { padding: 48px 0; border-top: 1px solid var(--mat); }
.info-section h2 {
  font-family: var(--font-display);
  font-size: 27px;
  margin: 0 0 26px;
  letter-spacing: -0.01em;
}
.steps { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.step {
  background: var(--paper-dim);
  border: 1px solid var(--mat);
  border-radius: var(--radius-sm);
  padding: 20px;
}
.step .step-num {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--green-dark);
  display: block;
  margin-bottom: 8px;
}
.step h3 { font-size: 16px; margin: 0 0 8px; }
.step p { color: var(--ink-soft); font-size: 14px; margin: 0; }

.use-case-list { padding: 0; margin: 0; list-style: none; display: grid; gap: 12px; }
.use-case-list li {
  background: var(--paper-dim);
  border: 1px solid var(--mat);
  border-radius: var(--radius-sm);
  padding: 15px 18px;
  font-size: 14px;
  color: var(--ink-soft);
}
.use-case-list strong { color: var(--ink); }

details {
  background: var(--paper-dim);
  border: 1px solid var(--mat);
  border-radius: var(--radius-sm);
  padding: 15px 18px;
  margin-bottom: 10px;
}
summary { cursor: pointer; font-weight: 600; }
details p { color: var(--ink-soft); margin: 10px 0 0; font-size: 14px; }

/* ---------- Footer ---------- */
.site-footer { border-top: 1px solid var(--mat); padding: 26px 0; }
.footer-inner {
  display: flex; justify-content: space-between; flex-wrap: wrap; gap: 10px;
  color: var(--ink-soft); font-size: 13px; font-family: var(--font-mono);
}
.footer-links a { color: var(--ink-soft); text-decoration: none; margin-left: 18px; }
.footer-links a:hover { color: var(--ink); }

@media (max-width: 760px) {
  .preview-grid, .steps { grid-template-columns: 1fr; }
  .footer-inner { flex-direction: column; text-align: center; }
  .footer-links a { margin: 0 8px; }
}

@media (prefers-reduced-motion: reduce) {
  .cutting-mat::after { animation: none; }
}