/* ============================================
   내일시안 — Warm Studio Minimal
   Design System: DESIGN.md
   ============================================ */

/* Fonts */
@import url("https://cdn.jsdelivr.net/gh/orioncactus/pretendard@v1.3.9/dist/web/variable/pretendardvariable-dynamic-subset.min.css");
@import url("https://fonts.googleapis.com/css2?family=IBM+Plex+Mono:wght@400;500&display=swap");
@import url("https://api.fontshare.com/v2/css?f[]=general-sans@500,600,700&display=swap");

/* Design tokens */
:root {
  /* Color */
  --bg: #FAFAF7;
  --surface: #F0EDE8;
  --surface-2: #E8E4DC;
  --ink: #1A1A1A;
  --muted: #8C8478;
  --line: rgba(26, 26, 26, 0.08);
  --accent: #D4622B;
  --accent-hover: #B8501F;

  /* Typography */
  --font-display: "General Sans", "Pretendard Variable", sans-serif;
  --font-body: "Pretendard Variable", "Pretendard", sans-serif;
  --font-mono: "IBM Plex Mono", monospace;

  /* Spacing (8px base) */
  --sp-2xs: 2px;
  --sp-xs: 4px;
  --sp-sm: 8px;
  --sp-md: 16px;
  --sp-lg: 24px;
  --sp-xl: 32px;
  --sp-2xl: 48px;
  --sp-3xl: 64px;
  --sp-4xl: 96px;

  /* Radius */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;

  /* Motion */
  --ease: cubic-bezier(.22, .84, .24, 1);
  --dur-short: 200ms;
  --dur-medium: 300ms;
}

/* Reset */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.65;
  color: var(--ink);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

a {
  color: inherit;
  text-decoration: none;
}

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

button {
  font: inherit;
  cursor: pointer;
  border: none;
  background: none;
}

/* Layout shell */
.shell {
  width: 100%;
  max-width: 960px;
  margin: 0 auto;
  padding: 0 var(--sp-lg);
}

/* Typography utilities */
.eyebrow {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--muted);
}

h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 600;
  line-height: 1.2;
  letter-spacing: -0.01em;
  color: var(--ink);
}

h1 {
  font-size: clamp(1.8rem, 4vw, 2.6rem);
  font-weight: 600;
}

h2 {
  font-size: clamp(1.3rem, 2.4vw, 1.7rem);
}

h3 {
  font-size: 1.05rem;
}

p {
  color: var(--ink);
}

p.lead {
  color: var(--muted);
  font-size: 1rem;
  line-height: 1.75;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--sp-sm);
  padding: 12px 20px;
  border-radius: var(--radius-sm);
  font-family: var(--font-body);
  font-size: 0.9rem;
  font-weight: 500;
  transition: transform var(--dur-short) var(--ease), background var(--dur-short) var(--ease), color var(--dur-short) var(--ease);
  white-space: nowrap;
}

.btn:hover {
  transform: translateY(-1px);
}

.btn-primary {
  background: var(--accent);
  color: #fff;
}

.btn-primary:hover {
  background: var(--accent-hover);
}

.btn-ghost {
  background: transparent;
  color: var(--ink);
  border: 1px solid var(--line);
}

.btn-ghost:hover {
  border-color: var(--ink);
}

/* ============================================
   Header
   ============================================ */
.site-header {
  border-bottom: 1px solid var(--line);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--sp-md) 0;
  gap: var(--sp-md);
}

.brand {
  font-family: var(--font-display);
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--ink);
}

.nav {
  display: none;
  gap: var(--sp-xl);
}

.nav a {
  font-size: 0.9rem;
  color: var(--muted);
  transition: color var(--dur-short) var(--ease);
}

.nav a:hover {
  color: var(--ink);
}

.header-cta {
  display: none;
}

@media (min-width: 720px) {
  .nav, .header-cta {
    display: flex;
  }
}

/* ============================================
   Hero
   ============================================ */
.hero {
  padding: var(--sp-3xl) 0 var(--sp-2xl);
}

.hero .eyebrow {
  margin-bottom: var(--sp-md);
}

.hero h1 {
  max-width: 16ch;
  margin-bottom: var(--sp-lg);
}

.hero h1 br {
  display: none;
}

@media (min-width: 640px) {
  .hero h1 br {
    display: inline;
  }
}

.hero .lead {
  max-width: 52ch;
  margin-bottom: var(--sp-xl);
}

.hero-actions {
  display: flex;
  gap: var(--sp-md);
  flex-wrap: wrap;
  margin-bottom: var(--sp-2xl);
}

.hero-meta {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--sp-lg);
  padding-top: var(--sp-lg);
  border-top: 1px solid var(--line);
}

@media (min-width: 640px) {
  .hero-meta {
    grid-template-columns: repeat(3, 1fr);
  }
}

.hero-meta-item span {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: var(--sp-xs);
}

.hero-meta-item strong {
  display: block;
  font-family: var(--font-body);
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--ink);
}

/* ============================================
   Section shared
   ============================================ */
.section {
  padding: var(--sp-3xl) 0;
  border-top: 1px solid var(--line);
}

.section-head {
  margin-bottom: var(--sp-2xl);
  max-width: 48ch;
}

.section-head .eyebrow {
  display: block;
  margin-bottom: var(--sp-sm);
}

.section-head h2 {
  margin-bottom: var(--sp-md);
}

.section-head p {
  color: var(--muted);
}

/* ============================================
   Proof (sample cards)
   ============================================ */
.proof-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--sp-lg);
}

@media (min-width: 720px) {
  .proof-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

.proof-card {
  display: block;
  background: var(--surface);
  border-radius: var(--radius-md);
  padding: var(--sp-lg);
  transition: transform var(--dur-short) var(--ease), background var(--dur-short) var(--ease);
  color: inherit;
}

.proof-card:hover {
  transform: translateY(-2px);
  background: var(--surface-2);
}

.proof-card.is-coming {
  cursor: default;
  opacity: 0.55;
}

.proof-card.is-coming:hover {
  transform: none;
  background: var(--surface);
}

.proof-card .eyebrow {
  display: block;
  margin-bottom: var(--sp-sm);
}

.proof-card h3 {
  margin-bottom: var(--sp-sm);
  font-size: 1.05rem;
}

.proof-card p {
  font-size: 0.85rem;
  color: var(--muted);
  line-height: 1.6;
}

.proof-card .link {
  display: inline-flex;
  align-items: center;
  gap: var(--sp-xs);
  margin-top: var(--sp-md);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

/* ============================================
   Workflow
   ============================================ */
.workflow-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--sp-xl);
}

@media (min-width: 720px) {
  .workflow-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: var(--sp-lg);
  }
}

.workflow-step {
  padding-top: var(--sp-md);
  border-top: 1px solid var(--ink);
}

.workflow-step .step-num {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--accent);
  letter-spacing: 0.08em;
}

.workflow-step h3 {
  margin: var(--sp-sm) 0 var(--sp-sm);
  font-size: 1rem;
}

.workflow-step p {
  font-size: 0.88rem;
  color: var(--muted);
  line-height: 1.65;
}

/* ============================================
   Packages
   ============================================ */
.package-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--sp-md);
}

@media (min-width: 720px) {
  .package-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

.package {
  background: var(--surface);
  border-radius: var(--radius-md);
  padding: var(--sp-xl);
  display: flex;
  flex-direction: column;
}

.package.featured {
  background: var(--ink);
  color: var(--bg);
}

.package.featured .eyebrow,
.package.featured .package-desc,
.package.featured ul {
  color: rgba(250, 250, 247, 0.7);
}

.package.featured .package-price {
  color: var(--bg);
}

.package .eyebrow {
  display: block;
  margin-bottom: var(--sp-md);
}

.package-price {
  font-family: var(--font-display);
  font-size: 1.4rem;
  font-weight: 600;
  color: var(--ink);
  margin-bottom: var(--sp-xs);
}

.package-desc {
  font-size: 0.85rem;
  color: var(--muted);
  margin-bottom: var(--sp-lg);
}

.package ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: var(--sp-sm);
  font-size: 0.88rem;
  color: var(--muted);
  line-height: 1.55;
}

.package ul li {
  padding-left: var(--sp-md);
  position: relative;
}

.package ul li::before {
  content: "—";
  position: absolute;
  left: 0;
  color: var(--accent);
}

.package-note {
  margin-top: var(--sp-xl);
  font-size: 0.82rem;
  color: var(--muted);
  line-height: 1.7;
  max-width: 60ch;
}

/* ============================================
   Request form
   ============================================ */
.request-shell {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--sp-2xl);
}

@media (min-width: 900px) {
  .request-shell {
    grid-template-columns: 1fr 1.1fr;
  }
}

.request-copy h2 {
  margin-bottom: var(--sp-md);
}

.request-copy p {
  color: var(--muted);
  margin-bottom: var(--sp-lg);
}

.request-form {
  display: flex;
  flex-direction: column;
  gap: var(--sp-md);
}

.request-form label {
  display: flex;
  flex-direction: column;
  gap: var(--sp-xs);
  font-size: 0.85rem;
  font-weight: 500;
}

.request-form input,
.request-form select,
.request-form textarea {
  width: 100%;
  padding: 12px 14px;
  background: var(--bg);
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  font-family: var(--font-body);
  font-size: 0.92rem;
  color: var(--ink);
  transition: border-color var(--dur-short) var(--ease);
}

.request-form textarea {
  resize: vertical;
  min-height: 120px;
  line-height: 1.6;
}

.request-form input:focus,
.request-form select:focus,
.request-form textarea:focus {
  outline: none;
  border-color: var(--accent);
}

.request-form select {
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%238C8478' d='M6 8L1 3h10z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 14px center;
  padding-right: 36px;
}

.form-submit {
  align-self: flex-start;
  margin-top: var(--sp-sm);
}

.form-status {
  font-size: 0.85rem;
  color: var(--muted);
  min-height: 1.2em;
}

.form-status[data-state="error"] {
  color: #C4392D;
}

.form-status[data-state="success"] {
  color: var(--accent);
}

/* Optional section */
.form-optional {
  margin-top: var(--sp-md);
  padding-top: var(--sp-lg);
  border-top: 1px dashed var(--line);
  display: flex;
  flex-direction: column;
  gap: var(--sp-lg);
}

.optional-head {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.optional-head span {
  text-transform: none;
  letter-spacing: 0;
  font-family: var(--font-body);
  font-size: 0.78rem;
  color: var(--muted);
}

.form-field {
  display: flex;
  flex-direction: column;
  gap: var(--sp-sm);
}

.form-field .form-label {
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--ink);
}

.form-field .hint {
  font-weight: 400;
  color: var(--muted);
  font-size: 0.78rem;
  margin-left: var(--sp-xs);
}

.tag-group {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.tag {
  padding: 8px 14px;
  background: var(--bg);
  border: 1px solid var(--line);
  border-radius: 100px;
  font-family: var(--font-body);
  font-size: 0.82rem;
  color: var(--ink);
  cursor: pointer;
  transition: background var(--dur-short) var(--ease),
    border-color var(--dur-short) var(--ease),
    color var(--dur-short) var(--ease);
}

.tag:hover {
  border-color: var(--ink);
}

.tag.is-active {
  background: var(--ink);
  border-color: var(--ink);
  color: var(--bg);
}

.tag.is-active:hover {
  background: var(--accent);
  border-color: var(--accent);
}

/* ============================================
   FAQ
   ============================================ */
.faq-list {
  display: flex;
  flex-direction: column;
  border-top: 1px solid var(--line);
}

.faq-item {
  border-bottom: 1px solid var(--line);
  padding: var(--sp-lg) 0;
}

.faq-item summary {
  list-style: none;
  cursor: pointer;
  font-family: var(--font-display);
  font-size: 1rem;
  font-weight: 600;
  color: var(--ink);
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: var(--sp-md);
}

.faq-item summary::-webkit-details-marker {
  display: none;
}

.faq-item summary::after {
  content: "+";
  font-family: var(--font-mono);
  font-size: 1.2rem;
  color: var(--muted);
  transition: transform var(--dur-short) var(--ease);
}

.faq-item[open] summary::after {
  transform: rotate(45deg);
}

.faq-item p {
  margin-top: var(--sp-md);
  font-size: 0.92rem;
  color: var(--muted);
  line-height: 1.7;
}

/* ============================================
   Footer
   ============================================ */
.site-footer {
  margin-top: var(--sp-3xl);
  padding: var(--sp-2xl) 0;
  border-top: 1px solid var(--line);
}

.footer-inner {
  display: flex;
  flex-direction: column;
  gap: var(--sp-lg);
}

@media (min-width: 720px) {
  .footer-inner {
    flex-direction: row;
    justify-content: space-between;
    align-items: start;
  }
}

.footer-brand p {
  font-size: 0.85rem;
  color: var(--muted);
  margin-top: var(--sp-xs);
}

.footer-meta {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  line-height: 1.8;
}

/* ============================================
   Legal pages (Impressum / Privacy)
   ============================================ */
.legal-page {
  padding: var(--sp-3xl) 0 var(--sp-3xl);
}

.legal-page .shell {
  max-width: 720px;
}

.legal-page h1 {
  margin-bottom: var(--sp-md);
}

.legal-page .legal-updated {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--muted);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-bottom: var(--sp-2xl);
}

.legal-page h2 {
  margin-top: var(--sp-2xl);
  margin-bottom: var(--sp-md);
  font-size: 1.3rem;
}

.legal-page h3 {
  margin-top: var(--sp-xl);
  margin-bottom: var(--sp-sm);
  font-size: 1rem;
}

.legal-page p,
.legal-page ul,
.legal-page ol {
  margin-bottom: var(--sp-md);
  color: var(--ink);
  font-size: 0.95rem;
  line-height: 1.75;
}

.legal-page ul,
.legal-page ol {
  padding-left: var(--sp-lg);
}

.legal-page li {
  margin-bottom: var(--sp-xs);
}

.legal-page a {
  color: var(--accent);
  border-bottom: 1px solid currentColor;
}

.legal-page a:hover {
  color: var(--accent-hover);
}

.legal-page strong {
  font-weight: 600;
  color: var(--ink);
}

.legal-page .placeholder {
  background: var(--surface);
  padding: 2px 6px;
  border-radius: var(--radius-sm);
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--muted);
}

.legal-page .callout {
  background: var(--surface);
  border-left: 3px solid var(--accent);
  padding: var(--sp-md) var(--sp-lg);
  margin: var(--sp-lg) 0;
  font-size: 0.88rem;
  color: var(--muted);
}

/* Footer legal links */
.footer-legal {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  display: flex;
  gap: var(--sp-md);
  flex-wrap: wrap;
}

.footer-legal a:hover {
  color: var(--ink);
}

/* ============================================
   Scroll reveal
   ============================================ */
.reveal {
  opacity: 0;
  transform: translateY(12px);
  transition: opacity 500ms var(--ease), transform 500ms var(--ease);
  transition-delay: var(--reveal-delay, 0ms);
}

.reveal.is-visible {
  opacity: 1;
  transform: none;
}

@media (prefers-reduced-motion: reduce) {
  .reveal {
    opacity: 1;
    transform: none;
  }
  * {
    transition: none !important;
    animation: none !important;
  }
}