/* ==========================================================================
   자린이와 고비 — Pocket Ledger
   앱 브랜드 DNA를 웹으로 확장: 다크 우선, 파스텔 칩, 또렷한 레드/블루 시그널
   ========================================================================== */

/* ---------- Fonts ---------- */
@import url("https://fonts.googleapis.com/css2?family=Gowun+Dodum&family=IBM+Plex+Mono:wght@400;500;600&family=Fraunces:opsz,wght@9..144,400;9..144,600;9..144,800&display=swap");

/* ---------- Reset ---------- */
*, *::before, *::after { box-sizing: border-box; }
html, body, h1, h2, h3, h4, h5, h6, p, ul, ol, figure, blockquote { margin: 0; padding: 0; }
ul, ol { list-style: none; }
a { color: inherit; text-decoration: none; }
img, svg { display: block; max-width: 100%; }
button { font: inherit; border: 0; background: none; cursor: pointer; color: inherit; }

/* ---------- Design Tokens ---------- */
:root {
  /* Dark (default) */
  --bg:         #0A0A0B;
  --surface:   #17181A;
  --surface-2: #1F2024;
  --hairline:  rgba(255, 255, 255, 0.08);
  --hairline-strong: rgba(255, 255, 255, 0.14);
  --ink:       #F5F5F7;
  --ink-dim:   #C8C9CE;
  --muted:     #8A8B90;

  /* Financial signals (앱과 동일 톤) */
  --expense:   #FF3B5C;
  --income:    #1E7BFF;

  /* Pastel chips (카테고리 아이콘 계열) */
  --chip-cream:    #FFE9A3;
  --chip-cream-2:  #FFD36B;
  --chip-mint:     #B9F0D8;
  --chip-mint-2:   #7BE0B1;
  --chip-lavender: #C7B8FF;
  --chip-lavender-2:#9A83FF;
  --chip-peach:    #FFC7B0;
  --chip-peach-2:  #FF9C7A;
  --chip-sky:      #B7D8FF;
  --chip-rose:     #FFB3C7;

  /* Radius & shadow */
  --r-sm: 10px;
  --r-md: 16px;
  --r-lg: 22px;
  --r-xl: 28px;
  --r-pill: 999px;
  --shadow-card: 0 1px 0 rgba(255,255,255,0.04) inset, 0 20px 40px -20px rgba(0,0,0,0.6);
  --shadow-hover: 0 1px 0 rgba(255,255,255,0.06) inset, 0 28px 50px -22px rgba(0,0,0,0.7);

  /* Typography scale */
  --font-body: "Gowun Dodum", ui-sans-serif, system-ui, -apple-system, "Apple SD Gothic Neo", sans-serif;
  --font-mono: "IBM Plex Mono", ui-monospace, SFMono-Regular, Menlo, monospace;
  --font-display: "Fraunces", "Gowun Dodum", serif;

  /* Motion */
  --ease: cubic-bezier(0.2, 0.7, 0.2, 1);
}

@media (prefers-color-scheme: light) {
  :root {
    --bg:         #FAFAF8;
    --surface:   #FFFFFF;
    --surface-2: #F3F1EC;
    --hairline:  rgba(10, 10, 11, 0.08);
    --hairline-strong: rgba(10, 10, 11, 0.16);
    --ink:       #121316;
    --ink-dim:   #2D2E33;
    --muted:     #6C6D72;
    --shadow-card: 0 1px 0 rgba(255,255,255,1) inset, 0 18px 40px -24px rgba(20,20,30,0.25);
    --shadow-hover: 0 1px 0 rgba(255,255,255,1) inset, 0 26px 48px -26px rgba(20,20,30,0.35);
  }
}

/* ---------- Base ---------- */
html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}
body {
  font-family: var(--font-body);
  background: var(--bg);
  color: var(--ink);
  line-height: 1.65;
  letter-spacing: -0.005em;
  min-height: 100vh;
  overflow-x: hidden;
  background-image:
    radial-gradient(1200px 600px at 85% -10%, rgba(30, 123, 255, 0.10), transparent 60%),
    radial-gradient(900px 500px at -10% 20%, rgba(255, 59, 92, 0.08), transparent 60%),
    radial-gradient(700px 500px at 50% 120%, rgba(199, 184, 255, 0.10), transparent 60%);
  background-attachment: fixed;
}

::selection { background: var(--expense); color: #fff; }

/* ---------- Layout ---------- */
.container {
  width: 100%;
  max-width: 1120px;
  margin: 0 auto;
  padding: 0 24px;
}
@media (max-width: 640px) {
  .container { padding: 0 18px; }
}

/* ---------- Header ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  backdrop-filter: saturate(180%) blur(14px);
  -webkit-backdrop-filter: saturate(180%) blur(14px);
  background: color-mix(in oklab, var(--bg) 78%, transparent);
  border-bottom: 1px solid var(--hairline);
}
.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 64px;
  gap: 16px;
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-weight: 600;
  letter-spacing: -0.01em;
}
.brand-mark {
  width: 34px;
  height: 34px;
  display: inline-block;
  object-fit: contain;
  filter: drop-shadow(0 4px 10px rgba(0, 0, 0, 0.25));
}
@media (prefers-color-scheme: light) {
  .brand-mark { filter: drop-shadow(0 4px 10px rgba(20, 20, 30, 0.18)); }
}
.nav {
  display: flex;
  gap: 22px;
  font-size: 0.94rem;
}
.nav a { color: var(--ink-dim); transition: color 0.2s var(--ease); }
.nav a:hover { color: var(--ink); }
.lang-switch {
  display: inline-flex;
  gap: 2px;
  padding: 4px;
  border-radius: var(--r-pill);
  background: var(--surface-2);
  border: 1px solid var(--hairline);
  font-family: var(--font-mono);
  font-size: 0.78rem;
}
.lang-switch a {
  padding: 5px 10px;
  border-radius: var(--r-pill);
  color: var(--muted);
  letter-spacing: 0.04em;
}
.lang-switch a.active {
  background: var(--ink);
  color: var(--bg);
}
@media (max-width: 720px) {
  .nav { display: none; }
}

/* ---------- Hero ---------- */
.hero {
  padding: 64px 0 80px;
  position: relative;
}
@media (max-width: 720px) { .hero { padding: 40px 0 48px; } }

.hero-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 56px;
  align-items: center;
}
@media (max-width: 900px) {
  .hero-grid { grid-template-columns: 1fr; gap: 40px; }
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--muted);
  padding: 6px 12px;
  border-radius: var(--r-pill);
  background: var(--surface);
  border: 1px solid var(--hairline);
}
.eyebrow .dot {
  width: 6px; height: 6px; border-radius: 50%;
  background: var(--income);
  box-shadow: 0 0 12px var(--income);
  animation: pulse 2.4s var(--ease) infinite;
}
@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.55; transform: scale(0.85); }
}

.hero h1 {
  font-family: var(--font-body);
  font-size: clamp(2.2rem, 6.2vw, 4.2rem);
  line-height: 1.08;
  letter-spacing: -0.025em;
  margin: 22px 0 18px;
  font-weight: 400;
}
.hero h1 .accent-income { color: var(--income); }
.hero h1 .accent-expense { color: var(--expense); }
.hero h1 .en {
  display: block;
  font-family: var(--font-display);
  font-weight: 800;
  font-style: italic;
  font-size: 0.58em;
  letter-spacing: -0.02em;
  color: var(--muted);
  margin-top: 8px;
}
.hero p.lead {
  font-size: 1.1rem;
  color: var(--ink-dim);
  max-width: 540px;
  margin-bottom: 28px;
}
@media (max-width: 640px) {
  .hero p.lead { font-size: 1rem; }
}

.cta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 32px;
}
.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 14px 22px;
  border-radius: var(--r-pill);
  font-weight: 600;
  font-size: 0.98rem;
  transition: transform 0.25s var(--ease), box-shadow 0.25s var(--ease), background 0.2s var(--ease);
  border: 1px solid transparent;
}
.btn-primary {
  background: var(--ink);
  color: var(--bg);
  box-shadow: 0 14px 28px -14px rgba(0,0,0,0.5);
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 22px 36px -16px rgba(0,0,0,0.55); }
.btn-secondary {
  background: var(--surface);
  color: var(--ink);
  border-color: var(--hairline-strong);
}
.btn-secondary:hover { background: var(--surface-2); transform: translateY(-2px); }
.btn svg { width: 18px; height: 18px; }

.platform-badges {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--muted);
  letter-spacing: 0.05em;
}
.platform-badges span {
  padding: 6px 11px;
  border-radius: var(--r-pill);
  background: var(--surface);
  border: 1px solid var(--hairline);
}

/* ---------- Hero Visual (앱 카드 재현) ---------- */
.hero-visual {
  position: relative;
  perspective: 1200px;
}
.phone-card {
  position: relative;
  padding: 20px;
  background: var(--surface);
  border: 1px solid var(--hairline);
  border-radius: var(--r-xl);
  box-shadow: var(--shadow-card);
  transform: rotate(-1.5deg);
  transition: transform 0.6s var(--ease);
}
.phone-card:hover { transform: rotate(0deg) translateY(-4px); }

.balance-card {
  padding: 22px;
  border-radius: var(--r-lg);
  background: linear-gradient(180deg, #17181A 0%, #1F2024 100%);
  border: 1px solid rgba(255,255,255,0.06);
  position: relative;
  overflow: hidden;
}
.balance-card::before {
  content: "";
  position: absolute;
  inset: -40% -40% auto auto;
  width: 220px; height: 220px;
  background: radial-gradient(circle, rgba(30, 123, 255, 0.35), transparent 65%);
  filter: blur(30px);
  pointer-events: none;
}
.balance-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 18px;
}
.balance-head .period {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: #E7E7EA;
  letter-spacing: 0.02em;
}
.toggle-pill {
  display: inline-flex;
  background: rgba(255,255,255,0.08);
  border-radius: var(--r-pill);
  padding: 3px;
  font-family: var(--font-mono);
  font-size: 0.72rem;
}
.toggle-pill span {
  padding: 5px 11px;
  border-radius: var(--r-pill);
  color: rgba(255,255,255,0.55);
}
.toggle-pill span.active { background: #fff; color: #1F2024; }

.balance-amount {
  font-family: var(--font-mono);
  font-size: 2rem;
  font-weight: 600;
  color: #fff;
  letter-spacing: -0.02em;
  margin-bottom: 18px;
}

.flow-row {
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 12px;
  align-items: center;
  padding: 6px 0;
  font-family: var(--font-mono);
  font-size: 0.82rem;
}
.flow-row .label { color: #C8C9CE; }
.flow-row .amount { color: #fff; font-weight: 600; }
.flow-bar {
  height: 7px;
  border-radius: 4px;
  background: rgba(255,255,255,0.08);
  overflow: hidden;
  position: relative;
}
.flow-bar::after {
  content: "";
  position: absolute;
  inset: 0 0 0 0;
  border-radius: 4px;
  transform-origin: left;
  animation: barFill 1.6s var(--ease) 0.3s both;
}
.flow-bar.expense::after { background: linear-gradient(90deg, #FF3B5C, #FF6D4A); width: 100%; }
.flow-bar.income::after  { background: linear-gradient(90deg, #1E7BFF, #6BA6FF); width: 78%; }
@keyframes barFill {
  from { transform: scaleX(0); }
  to   { transform: scaleX(1); }
}

/* Category chips under balance card — echoes app's category icons */
.chip-row {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 10px;
  margin-top: 20px;
}
@media (max-width: 420px) {
  .chip-row { grid-template-columns: repeat(4, 1fr); }
  .chip-row .chip:nth-child(n+5) { display: none; }
}
.chip {
  aspect-ratio: 1;
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--c1), var(--c2));
  box-shadow: 0 6px 14px -6px rgba(0,0,0,0.4);
}
.chip svg { width: 56%; height: 56%; }

/* ---------- Sections ---------- */
section { padding: 80px 0; scroll-margin-top: 72px; }
@media (max-width: 720px) { section { padding: 56px 0; } }

.section-head {
  max-width: 680px;
  margin: 0 auto 48px;
  text-align: center;
}
.section-head .tag {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 12px;
}
.section-head h2 {
  font-size: clamp(1.8rem, 4vw, 2.6rem);
  font-weight: 400;
  letter-spacing: -0.02em;
  line-height: 1.15;
}
.section-head p {
  color: var(--ink-dim);
  margin-top: 12px;
  font-size: 1.02rem;
}

/* ---------- Feature Grid ---------- */
.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
}
@media (max-width: 900px) { .feature-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 560px) { .feature-grid { grid-template-columns: 1fr; } }

.feature-card {
  padding: 26px;
  border-radius: var(--r-lg);
  background: var(--surface);
  border: 1px solid var(--hairline);
  transition: transform 0.3s var(--ease), box-shadow 0.3s var(--ease), border-color 0.3s var(--ease);
  position: relative;
  overflow: hidden;
}
.feature-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-hover);
  border-color: var(--hairline-strong);
}
.feature-icon {
  width: 48px;
  height: 48px;
  border-radius: 14px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 18px;
  background: linear-gradient(135deg, var(--c1), var(--c2));
  box-shadow: 0 8px 20px -10px rgba(0,0,0,0.5);
}
.feature-icon svg { width: 26px; height: 26px; }
.feature-card h3 {
  font-size: 1.15rem;
  font-weight: 600;
  letter-spacing: -0.01em;
  margin-bottom: 8px;
}
.feature-card p {
  color: var(--ink-dim);
  font-size: 0.95rem;
}

/* ---------- Screenshots Section ---------- */
.shots {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}
@media (max-width: 900px) { .shots { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 560px) { .shots { grid-template-columns: 1fr; } }

.shot {
  aspect-ratio: 9 / 19.5;
  border-radius: 26px;
  background: linear-gradient(180deg, var(--surface) 0%, var(--surface-2) 100%);
  border: 1px solid var(--hairline);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--muted);
  font-family: var(--font-mono);
  font-size: 0.82rem;
  letter-spacing: 0.04em;
  position: relative;
  overflow: hidden;
  box-shadow: var(--shadow-card);
  transition: transform 0.3s var(--ease);
}
.shot:hover { transform: translateY(-4px); }
.shot::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(135deg, transparent 40%, rgba(255,255,255,0.04) 50%, transparent 60%),
    repeating-linear-gradient(45deg, rgba(255,255,255,0.02) 0 2px, transparent 2px 10px);
  pointer-events: none;
}

/* ---------- Mascot (고비) ---------- */
.mascot-strip {
  margin-top: 48px;
  padding: 32px 24px;
  border-radius: var(--r-xl);
  background: linear-gradient(135deg, rgba(30, 123, 255, 0.12), rgba(199, 184, 255, 0.10));
  border: 1px solid var(--hairline);
  display: flex;
  align-items: center;
  gap: 22px;
  flex-wrap: wrap;
  justify-content: center;
  text-align: center;
}
.mascot-strip .mascot { width: 88px; height: 88px; flex-shrink: 0; }
.mascot-strip p {
  font-size: 1.04rem;
  color: var(--ink-dim);
  max-width: 520px;
}
.mascot-strip strong { color: var(--ink); font-weight: 600; }

/* ---------- Document pages (privacy/terms/support) ---------- */
.doc {
  padding: 60px 0 120px;
}
.doc .container { max-width: 820px; }
.doc header.doc-head {
  padding: 24px 0 40px;
  border-bottom: 1px solid var(--hairline);
  margin-bottom: 40px;
}
.doc .doc-head .tag {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--muted);
}
.doc .doc-head h1 {
  font-size: clamp(1.8rem, 4vw, 2.6rem);
  font-weight: 400;
  letter-spacing: -0.02em;
  margin: 12px 0 8px;
}
.doc .doc-head .meta {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: var(--muted);
  margin-top: 10px;
}
.doc h2 {
  font-size: 1.35rem;
  font-weight: 600;
  letter-spacing: -0.01em;
  margin: 40px 0 14px;
  padding-top: 16px;
  border-top: 1px solid var(--hairline);
}
.doc h2:first-of-type { border-top: 0; padding-top: 0; }
.doc h3 {
  font-size: 1.05rem;
  font-weight: 600;
  margin: 20px 0 8px;
  color: var(--ink);
}
.doc p, .doc li {
  color: var(--ink-dim);
  font-size: 1rem;
  line-height: 1.8;
}
.doc p { margin-bottom: 14px; }
.doc ul, .doc ol { margin: 8px 0 18px 0; padding-left: 0; }
.doc ul li, .doc ol li {
  position: relative;
  padding-left: 22px;
  margin-bottom: 6px;
}
.doc ul li::before {
  content: "";
  position: absolute;
  left: 6px; top: 0.75em;
  width: 5px; height: 5px;
  border-radius: 50%;
  background: var(--muted);
}
.doc ol { counter-reset: docitem; }
.doc ol > li { counter-increment: docitem; }
.doc ol > li::before {
  content: counter(docitem);
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--income);
  position: absolute;
  left: 0; top: 0.25em;
  font-weight: 600;
}
.doc a {
  color: var(--income);
  border-bottom: 1px solid color-mix(in oklab, var(--income) 40%, transparent);
  transition: border-color 0.2s var(--ease);
}
.doc a:hover { border-bottom-color: var(--income); }
.doc table {
  width: 100%;
  border-collapse: collapse;
  margin: 18px 0 24px;
  font-size: 0.95rem;
}
.doc th, .doc td {
  padding: 12px 14px;
  border-bottom: 1px solid var(--hairline);
  text-align: left;
  vertical-align: top;
}
.doc th {
  font-weight: 600;
  color: var(--ink);
  font-size: 0.86rem;
  letter-spacing: 0.02em;
  background: var(--surface);
}
.doc blockquote {
  padding: 14px 18px;
  border-left: 3px solid var(--income);
  background: var(--surface);
  border-radius: 0 var(--r-sm) var(--r-sm) 0;
  margin: 18px 0;
  color: var(--ink-dim);
}

/* ---------- Support (FAQ) ---------- */
.faq { display: grid; gap: 12px; }
.faq details {
  background: var(--surface);
  border: 1px solid var(--hairline);
  border-radius: var(--r-md);
  padding: 18px 22px;
  transition: border-color 0.2s var(--ease), background 0.2s var(--ease);
}
.faq details[open] { border-color: var(--hairline-strong); }
.faq summary {
  cursor: pointer;
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 14px;
  font-weight: 600;
  font-size: 1rem;
  color: var(--ink);
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after {
  content: "＋";
  font-family: var(--font-mono);
  color: var(--muted);
  font-size: 1.3rem;
  transition: transform 0.3s var(--ease);
}
.faq details[open] summary::after { content: "−"; }
.faq details > *:not(summary) { margin-top: 12px; color: var(--ink-dim); line-height: 1.75; }

.contact-card {
  margin-top: 40px;
  padding: 28px;
  border-radius: var(--r-lg);
  background: var(--surface);
  border: 1px solid var(--hairline);
  display: grid;
  gap: 14px;
}
.contact-card h3 { font-size: 1.1rem; font-weight: 600; }
.contact-card .contact-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-items: center;
}
.contact-card code {
  font-family: var(--font-mono);
  font-size: 0.92rem;
  padding: 4px 10px;
  background: var(--surface-2);
  border-radius: 6px;
  border: 1px solid var(--hairline);
}

/* ---------- Footer ---------- */
.site-footer {
  border-top: 1px solid var(--hairline);
  padding: 44px 0 36px;
  margin-top: 20px;
  color: var(--muted);
  font-size: 0.9rem;
}
.site-footer .container {
  display: grid;
  grid-template-columns: 1.3fr 1fr 1fr 1fr;
  gap: 32px;
}
@media (max-width: 720px) {
  .site-footer .container { grid-template-columns: 1fr 1fr; }
}
.site-footer h4 {
  font-size: 0.82rem;
  font-family: var(--font-mono);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--ink-dim);
  margin-bottom: 14px;
  font-weight: 500;
}
.site-footer ul { display: grid; gap: 8px; }
.site-footer a { color: var(--muted); transition: color 0.2s var(--ease); }
.site-footer a:hover { color: var(--ink); }
.site-footer .about-col p { margin-top: 10px; max-width: 280px; }
.legal-line {
  grid-column: 1 / -1;
  margin-top: 32px;
  padding-top: 24px;
  border-top: 1px solid var(--hairline);
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 12px;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.02em;
}

/* ---------- Stagger reveal on load ---------- */
.reveal { opacity: 0; transform: translateY(10px); animation: reveal 0.8s var(--ease) forwards; }
@keyframes reveal {
  to { opacity: 1; transform: translateY(0); }
}
.reveal.d1 { animation-delay: 0.05s; }
.reveal.d2 { animation-delay: 0.15s; }
.reveal.d3 { animation-delay: 0.25s; }
.reveal.d4 { animation-delay: 0.35s; }
.reveal.d5 { animation-delay: 0.45s; }
.reveal.d6 { animation-delay: 0.55s; }

@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; animation: none; }
  .flow-bar::after { animation: none; transform: scaleX(1); }
  .eyebrow .dot { animation: none; }
  * { scroll-behavior: auto; }
}

/* ---------- Utility ---------- */
.mono { font-family: var(--font-mono); }
.text-expense { color: var(--expense); }
.text-income { color: var(--income); }
.hr-hairline { height: 1px; background: var(--hairline); border: 0; margin: 32px 0; }