/* ------------------------------------------------------------------
   doion — Systems Precision
   Navy 다크 콘솔 톤 + Paper 라이트 섹션(가격표/CTA) 번갈아 배치
   Accent(블루) 주요 액션 · Teal 보조 하이라이트 · Orange 알림/뱃지
------------------------------------------------------------------- */

:root {
  /* navy (default, dark sections) */
  --bg: #13181C;
  --bg-alt: #181E23;
  --surface: #1D2329;
  --surface-raised: #232A32;
  --line: rgba(255, 255, 255, 0.08);
  --line-strong: rgba(255, 255, 255, 0.16);
  --text: #FDFEF8;
  --text-muted: #9AA0A8;
  --text-faint: #5E626B;

  /* paper (light sections, via .section--light) */
  --paper: #FDFEF8;
  --paper-alt: #F3F2F8;
  --ink: #1C1C1C;
  --ink-muted: #5E626B;
  --ink-faint: #8A8D94;
  --paper-line: rgba(28, 28, 28, 0.12);
  --paper-line-strong: rgba(28, 28, 28, 0.22);

  --accent: #4675DB;
  --accent-strong: #6E90E8;
  --teal: #01948C;
  --orange: #D35032;
  --success: #388F41;
  --error: #CF4241;
  --amber: #FFB020;

  --font-display: "Pretendard", -apple-system, BlinkMacSystemFont, sans-serif;
  --font-body: "Pretendard", -apple-system, BlinkMacSystemFont, sans-serif;
  --font-mono: "JetBrains Mono", ui-monospace, monospace;

  --sp-1: 4px;
  --sp-2: 8px;
  --sp-3: 12px;
  --sp-4: 16px;
  --sp-5: 24px;
  --sp-6: 32px;
  --sp-7: 48px;
  --sp-8: 64px;
  --sp-9: 96px;

  --content-max: 1120px;
  --radius: 10px;
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: 0.01ms !important; animation-iteration-count: 1 !important; transition-duration: 0.01ms !important; }
}

body {
  margin: 0;
  background: var(--bg);
  background-image: radial-gradient(circle, rgba(255,255,255,0.055) 1px, transparent 1px);
  background-size: 28px 28px;
  color: var(--text);
  font-family: var(--font-body);
  font-size: 17px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}

img { max-width: 100%; display: block; }
ul, ol { margin: 0; padding: 0; list-style: none; }

.wrap {
  max-width: var(--content-max);
  margin: 0 auto;
  padding: 0 var(--sp-5);
}

h1, h2, h3 {
  font-family: var(--font-display);
  font-weight: 800;
  letter-spacing: -0.01em;
  line-height: 1.3;
  margin: 0;
  color: var(--text);
}

.eyebrow {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  color: var(--teal);
  margin: 0 0 var(--sp-3);
}

/* ---------- light section scope ---------- */
.section--light {
  --bg: var(--paper);
  --bg-alt: var(--paper-alt);
  --surface: #FFFFFF;
  --surface-raised: var(--paper-alt);
  --line: var(--paper-line);
  --line-strong: var(--paper-line-strong);
  --text: var(--ink);
  --text-muted: var(--ink-muted);
  --text-faint: var(--ink-faint);
}

.section-lead {
  color: var(--text-muted);
  font-size: 1.05rem;
  line-height: 1.7;
  max-width: 46ch;
  margin: var(--sp-4) 0 0;
}

/* ---------- buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 14px 28px;
  border-radius: 8px;
  font-family: var(--font-body);
  font-weight: 700;
  font-size: 0.95rem;
  text-decoration: none;
  cursor: pointer;
  border: 1px solid transparent;
  transition: transform 0.18s var(--ease), box-shadow 0.18s var(--ease), background 0.18s var(--ease), border-color 0.18s var(--ease);
}
.btn-solid {
  background: var(--accent);
  color: #ffffff;
  box-shadow: 0 0 0 1px rgba(70,117,219,0.4), 0 8px 24px -8px rgba(70,117,219,0.55);
}
.btn-solid:hover { transform: translateY(-2px); background: var(--accent-strong); }
.btn-solid:active { transform: translateY(0); }
.btn-ghost {
  background: transparent;
  color: var(--text);
  border-color: var(--line-strong);
}
.btn-ghost:hover { border-color: var(--accent-strong); color: var(--accent-strong); }
.btn-sm { padding: 10px 18px; font-size: 0.85rem; }
.btn-full { width: 100%; padding: 16px; }

/* ---------- nav ---------- */
.nav {
  position: sticky; top: 0; z-index: 40;
  background: rgba(19, 24, 28, 0.82);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
}
.nav-inner {
  display: flex; align-items: center; justify-content: space-between;
  gap: var(--sp-5);
  padding-top: var(--sp-3); padding-bottom: var(--sp-3);
}
.logo {
  display: inline-flex;
  align-items: center;
  text-decoration: none;
  flex-shrink: 0;
}
.logo img { height: 26px; width: auto; display: block; }
.nav-links {
  display: flex; gap: var(--sp-5);
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 0.95rem;
  margin-right: auto;
  margin-left: var(--sp-6);
}
.nav-links a { color: var(--text-muted); text-decoration: none; transition: color 0.15s var(--ease); }
.nav-links a:hover, .nav-links a[aria-current="page"] { color: var(--accent-strong); }
@media (max-width: 760px) { .nav-links { display: none; } }

/* ---------- sub-page header ---------- */
.page-header { padding: var(--sp-8) 0 var(--sp-6); position: relative; overflow: hidden; }
.page-header::before {
  content: "";
  position: absolute;
  width: 440px; height: 440px;
  top: -220px; left: 8%;
  border-radius: 50%;
  filter: blur(80px);
  pointer-events: none;
  z-index: 0;
  background: radial-gradient(circle, rgba(70,117,219,0.28), transparent 70%);
}
.page-header .wrap { position: relative; z-index: 1; }
.page-header h1 { font-size: clamp(2rem, 5vw, 2.8rem); }

/* ---------- cta row (index bottom links) ---------- */
.next-steps {
  padding: var(--sp-8) 0 var(--sp-9);
  text-align: center;
  position: relative;
  overflow: hidden;
  background: linear-gradient(135deg, #E7EDFB 0%, #EAF3F1 100%);
}
.next-steps::before {
  content: "";
  position: absolute;
  width: 480px; height: 480px;
  top: -220px; left: 8%;
  border-radius: 50%;
  filter: blur(90px);
  pointer-events: none;
  z-index: 0;
  background: radial-gradient(circle, rgba(70,117,219,0.18), transparent 70%);
}
.next-steps::after {
  content: "";
  position: absolute;
  width: 420px; height: 420px;
  bottom: -200px; right: 8%;
  border-radius: 50%;
  filter: blur(90px);
  pointer-events: none;
  z-index: 0;
  background: radial-gradient(circle, rgba(1,148,140,0.18), transparent 70%);
}
.next-steps .wrap { position: relative; z-index: 1; }
.next-steps .eyebrow { color: var(--teal); }
.next-steps h2 { color: var(--ink); }
.next-steps .btn-ghost { color: var(--ink); border-color: var(--paper-line-strong); }
.next-steps .btn-ghost:hover { border-color: var(--accent); color: var(--accent); }
.cta-row { display: flex; gap: var(--sp-3); justify-content: center; flex-wrap: wrap; }

/* ---------- hero ---------- */
.hero { padding: var(--sp-9) 0 var(--sp-8); text-align: center; position: relative; overflow: hidden; }
.hero::before,
.hero::after {
  content: "";
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  pointer-events: none;
  z-index: 0;
}
.hero::before {
  width: 560px; height: 560px;
  top: -220px; left: 50%;
  transform: translateX(-50%);
  background: radial-gradient(circle, rgba(70,117,219,0.35), transparent 70%);
}
.hero::after {
  width: 380px; height: 380px;
  bottom: -160px; right: 6%;
  background: radial-gradient(circle, rgba(211,80,50,0.14), transparent 70%);
}
.hero-wrap { position: relative; z-index: 1; }

.term-window {
  max-width: 480px;
  margin: 0 auto var(--sp-7);
  background: var(--surface);
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  overflow: hidden;
  text-align: left;
  box-shadow: 0 30px 60px -30px rgba(0,0,0,0.6);
}
.term-bar {
  display: flex; align-items: center; gap: var(--sp-2);
  background: var(--surface-raised);
  padding: var(--sp-3) var(--sp-4);
  border-bottom: 1px solid var(--line);
}
.dot { width: 10px; height: 10px; border-radius: 50%; display: inline-block; }
.dot-r { background: var(--error); }
.dot-y { background: var(--amber); }
.dot-g { background: var(--success); }
.term-path {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--text-faint);
  margin-left: var(--sp-3);
}
.term-body {
  padding: var(--sp-5);
  font-family: var(--font-body);
}
.term-checklist {
  display: flex;
  flex-direction: column;
  gap: var(--sp-2);
  margin: 0 0 var(--sp-4);
  padding: 0 0 var(--sp-4);
  border-bottom: 1px dashed var(--line-strong);
}
.term-checklist li {
  display: flex;
  align-items: center;
  gap: var(--sp-3);
  font-size: 0.95rem;
  color: var(--text-muted);
}
.term-check {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 18px; height: 18px;
  border-radius: 50%;
  background: rgba(56,143,65,0.16);
  color: var(--success);
  font-family: var(--font-mono);
  font-size: 0.7rem;
  font-weight: 700;
  flex-shrink: 0;
}
.term-checklist li.is-live { color: var(--text); font-weight: 600; }
.term-check--live::before {
  content: "";
  width: 8px; height: 8px;
  border-radius: 50%;
  background: var(--success);
  box-shadow: 0 0 0 0 rgba(56,143,65,0.5);
  animation: term-pulse 1.8s ease-out infinite;
}
@keyframes term-pulse {
  0% { box-shadow: 0 0 0 0 rgba(56,143,65,0.5); }
  70% { box-shadow: 0 0 0 8px rgba(56,143,65,0); }
  100% { box-shadow: 0 0 0 0 rgba(56,143,65,0); }
}
.term-result { display: flex; flex-direction: column; gap: var(--sp-1); }
.term-result-label {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.04em;
  color: var(--text-faint);
}
.term-line { font-size: 1.1rem; color: var(--text); }
.term-type { color: var(--accent-strong); font-weight: 700; }
.term-cursor {
  color: var(--accent-strong);
  animation: blink 1s step-end infinite;
}
@keyframes blink { 50% { opacity: 0; } }

.hero-title {
  font-size: clamp(2.4rem, 6vw, 4rem);
  line-height: 1.15;
  margin-bottom: var(--sp-5);
}
.hero-sub {
  font-size: 1.05rem;
  color: var(--text-muted);
  margin: 0 auto var(--sp-7);
  max-width: 40ch;
}
.hero-ctas { display: flex; gap: var(--sp-3); justify-content: center; flex-wrap: wrap; }

/* ---------- problem / diagnostic log ---------- */
.problem { padding: var(--sp-9) 0; }
.problem h2 { font-size: clamp(1.6rem, 4vw, 2.4rem); margin-bottom: var(--sp-7); }
.log-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--sp-5);
}
.log-card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: var(--sp-5);
  transition: border-color 0.2s var(--ease), transform 0.2s var(--ease);
}
.log-card:hover { border-color: var(--line-strong); transform: translateY(-4px); }
.log-head { display: flex; align-items: center; gap: var(--sp-3); margin-bottom: var(--sp-4); }
.log-no { font-family: var(--font-mono); font-size: 0.85rem; color: var(--text-faint); }
.log-tag {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  color: var(--orange);
  background: rgba(211,80,50,0.12);
  border: 1px solid rgba(211,80,50,0.32);
  border-radius: 4px;
  padding: 2px 8px;
}
.log-card h3 { font-size: 1.2rem; margin-bottom: var(--sp-3); font-weight: 700; line-height: 1.4; }
.log-card p:not(.log-no) { color: var(--text-muted); font-size: 1rem; line-height: 1.6; margin: 0; }

/* ---------- pricing / spec sheet ---------- */
.pricing { padding: var(--sp-9) 0; background: var(--bg-alt); }
.pricing h2 { font-size: clamp(1.6rem, 4vw, 2.4rem); }
.spec-row {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--sp-5);
  margin-top: var(--sp-7);
}
.spec-panel {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: var(--sp-6) var(--sp-5);
  position: relative;
}
.spec-popular {
  border-color: var(--accent);
  box-shadow: 0 0 0 1px var(--accent), 0 24px 48px -24px rgba(70,117,219,0.5);
  background: var(--surface-raised);
  position: relative;
}
.spec-popular::before {
  content: "";
  position: absolute;
  width: 260px; height: 260px;
  top: -110px; right: -80px;
  border-radius: 50%;
  filter: blur(60px);
  pointer-events: none;
  z-index: 0;
  background: radial-gradient(circle, rgba(70,117,219,0.4), transparent 70%);
}
.section--light .spec-popular::before {
  background: radial-gradient(circle, rgba(70,117,219,0.16), transparent 70%);
}
.spec-popular > * { position: relative; z-index: 1; }
.spec-badge {
  position: absolute; top: -12px; left: 20px;
  background: var(--accent);
  color: #fff;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  padding: 4px 10px;
  border-radius: 4px;
}
.spec-name { font-family: var(--font-body); font-weight: 700; font-size: 1.05rem; margin: 0 0 var(--sp-2); color: var(--text); }
.spec-price { font-family: var(--font-mono); font-size: 2.4rem; font-weight: 700; margin: 0 0 var(--sp-5); color: var(--text); }
.spec-price span { font-size: 1rem; font-weight: 500; margin-left: 4px; color: var(--text-muted); }
.spec-panel ul { display: flex; flex-direction: column; gap: var(--sp-3); }
.spec-panel li {
  font-size: 0.98rem;
  line-height: 1.5;
  padding-left: var(--sp-5);
  position: relative;
  color: var(--text-muted);
}
.spec-panel li::before {
  content: ">";
  position: absolute; left: 0;
  color: var(--teal);
  font-family: var(--font-mono);
  font-weight: 700;
}
.price-note {
  text-align: center;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--text-faint);
  margin-top: var(--sp-6);
}

/* ---------- demo ---------- */
.demo { padding: var(--sp-9) 0; }
.demo h2 { font-size: clamp(1.6rem, 4vw, 2.4rem); }
.browser-mockup {
  margin-top: var(--sp-7);
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--line-strong);
  box-shadow: 0 30px 70px -30px rgba(0,0,0,0.7);
}
.browser-bar {
  display: flex; align-items: center; gap: var(--sp-2);
  background: var(--surface-raised);
  padding: var(--sp-3) var(--sp-4);
  border-bottom: 1px solid var(--line);
}
.browser-url {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--text-muted);
  background: var(--bg);
  border-radius: 4px;
  padding: 3px 12px;
  margin-left: var(--sp-3);
}
.browser-live-badge {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  color: var(--success);
  border: 1px solid rgba(56,143,65,0.4);
  background: rgba(56,143,65,0.14);
  border-radius: 4px;
  padding: 2px 8px;
  margin-left: auto;
}
.browser-iframe {
  display: block;
  width: 100%;
  height: 640px;
  border: 0;
  background: #121212;
}

/* ---------- process / pipeline ---------- */
.process { padding: var(--sp-9) 0; }
.process h2 { font-size: clamp(1.6rem, 4vw, 2.4rem); margin-bottom: var(--sp-7); }
.pipeline {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0;
  position: relative;
}
.pipeline li {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: var(--sp-5);
  position: relative;
  margin-right: var(--sp-5);
}
.pipeline li:last-child { margin-right: 0; }
.pipeline li::before {
  content: "";
  position: absolute;
  top: 22px; right: calc(-1 * var(--sp-5) + 1px);
  width: var(--sp-5);
  height: 1px;
  background: var(--line-strong);
  display: none;
}
.pipeline li:not(:last-child)::before { display: block; }
.pipeline li::after {
  content: "";
  position: absolute;
  top: 18px; left: var(--sp-5);
  width: 8px; height: 8px;
  border-radius: 50%;
  background: var(--accent);
}
.tl-no {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--teal);
  margin-bottom: var(--sp-3);
  padding-left: var(--sp-4);
}
.tl-name { display: block; font-family: var(--font-display); font-weight: 800; font-size: 1.3rem; margin-bottom: var(--sp-2); }
.pipeline p { margin: 0; font-size: 0.98rem; line-height: 1.55; color: var(--text-muted); }

/* ---------- contact ---------- */
.contact { padding: var(--sp-9) 0; }
.contact-panel {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 18px;
  padding: var(--sp-8) var(--sp-6);
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--sp-8);
  align-items: center;
  position: relative;
  overflow: hidden;
}
.contact-panel::before {
  content: "";
  position: absolute;
  width: 420px; height: 420px;
  top: -160px; right: -120px;
  border-radius: 50%;
  filter: blur(80px);
  pointer-events: none;
  z-index: 0;
  background: radial-gradient(circle, rgba(70,117,219,0.3), transparent 70%);
}
.contact-panel > * { position: relative; z-index: 1; }
.contact-copy h2 { font-size: clamp(1.6rem, 4vw, 2.2rem); margin: var(--sp-2) 0 var(--sp-4); }
.contact-copy p { color: var(--text-muted); margin: 0; max-width: 34ch; }
.contact-form { display: flex; flex-direction: column; gap: var(--sp-4); }
.contact-form label { display: flex; flex-direction: column; gap: var(--sp-2); font-size: 0.92rem; font-weight: 600; color: var(--text-muted); }
.contact-form input {
  font-family: var(--font-body);
  font-size: 1rem;
  padding: 12px 14px;
  border-radius: 8px;
  border: 1px solid var(--line-strong);
  background: var(--bg);
  color: var(--text);
}
.contact-form input::placeholder { color: var(--text-faint); }
.contact-form input:focus { outline: 2px solid var(--accent); outline-offset: 1px; border-color: var(--accent); }
.form-note { font-size: 0.82rem; min-height: 1.2em; margin: 0; color: var(--text-muted); }
.form-note.is-error { color: var(--error); }
.form-note.is-success { color: var(--success); }

/* ---------- footer ---------- */
.site-footer { padding: var(--sp-7) 0; border-top: 1px solid var(--line); }
.footer-inner { display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: var(--sp-3); }
.footer-inner p:last-child { color: var(--text-muted); font-size: 0.88rem; margin: 0; }

/* ---------- responsive ---------- */
@media (max-width: 860px) {
  .log-grid, .spec-row { grid-template-columns: 1fr; }
  .pipeline { grid-template-columns: 1fr; }
  .pipeline li { margin-right: 0; margin-bottom: var(--sp-4); }
  .pipeline li:last-child { margin-bottom: 0; }
  .pipeline li::before { display: none; }
  .contact-panel { grid-template-columns: 1fr; }
}