/* ============================================
   index.css — BARREUN. 더바른컴퍼니
   ============================================ */

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
:root {
  --black: #0A0A0A;
  --white: #FFFFFF;
  --gray-50: #F7F7F5;
  --gray-100: #EFEFED;
  --gray-300: #C8C8C4;
  --gray-500: #888884;
  --gray-700: #444440;
  --serif: 'Noto Serif KR', 'Georgia', serif;
  --sans: 'Noto Sans KR', sans-serif;
  --max-w: 860px;
  --pad: clamp(1.5rem, 5vw, 4rem);
}
html { scroll-behavior: smooth; }
body { font-family: var(--sans); background: var(--white); color: var(--black); font-size: 16px; line-height: 1.75; -webkit-font-smoothing: antialiased; overflow-x: hidden; }
html { overflow-x: hidden; }
nav { position: sticky; top: 0; z-index: 100; background: rgba(255,255,255,0.95); backdrop-filter: blur(12px); border-bottom: 1px solid var(--gray-100); padding: 0 var(--pad); display: flex; align-items: center; justify-content: space-between; height: 60px; }
.nav-logo { font-family: var(--serif); font-size: 17px; font-weight: 600; letter-spacing: 0.1em; color: var(--black); text-decoration: none; }
.nav-links { display: flex; align-items: center; gap: 2.5rem; }
.nav-link { font-size: 13px; font-weight: 400; color: var(--gray-700); text-decoration: none; letter-spacing: 0.02em; transition: color 0.2s; }
.nav-link:hover { color: var(--black); }
.nav-cta { font-size: 13px; font-weight: 500; color: var(--white); background: var(--black); padding: 9px 20px; text-decoration: none; letter-spacing: 0.04em; transition: opacity 0.2s; cursor: pointer; border: none; font-family: var(--sans); }
.nav-cta:hover { opacity: 0.75; }
.wrap { max-width: var(--max-w); margin: 0 auto; padding: 0 var(--pad); }
.hero { padding: 10rem 0 8rem; border-bottom: none; background: var(--black); position: relative; }
.hero-label { font-size: 11px; font-weight: 500; letter-spacing: 0.15em; text-transform: uppercase; color: #888884; margin-bottom: 2.5rem; }
.hero h1 { font-family: var(--serif); font-size: clamp(2.4rem, 5.5vw, 3rem); font-weight: 300; line-height: 1.15; letter-spacing: -0.02em; margin-bottom: 2rem; max-width: 900px; color: var(--white); }
.hero h1 .sub { display: block; font-size: 0.4em; font-weight: 300; color: #888884; letter-spacing: 0.01em; line-height: 1.7; margin-top: 0.75rem; }
.hero-desc { font-size: 16px; color: #C8C8C4; line-height: 1.85; max-width: 560px; margin-bottom: 0.75rem; }
.hero-author { font-size: 12px; color: #888884; letter-spacing: 0.04em; margin-bottom: 3rem; }
.hero-actions { display: flex; gap: 1rem; align-items: center; flex-wrap: wrap; }
.btn-primary { font-size: 13px; font-weight: 500; color: var(--black); background: var(--white); padding: 13px 28px; text-decoration: none; letter-spacing: 0.04em; transition: opacity 0.2s; cursor: pointer; border: none; display: inline-block; font-family: var(--sans); }
.btn-primary:hover { opacity: 0.75; }
.btn-secondary { font-size: 13px; font-weight: 400; color: var(--gray-500); background: transparent; padding: 13px 28px; text-decoration: none; letter-spacing: 0.02em; border: 1px solid var(--gray-700); transition: border-color 0.2s, color 0.2s; display: inline-block; }
.btn-secondary:hover { border-color: var(--white); color: var(--white); }
.section { padding: 7rem 0; border-bottom: 1px solid var(--gray-100); }
.label { font-size: 11px; font-weight: 500; letter-spacing: 0.15em; text-transform: uppercase; color: var(--gray-500); margin-bottom: 2rem; }
.section-title { font-family: var(--serif); font-size: clamp(1.3rem, 2vw, 1.7rem); font-weight: 400; line-height: 1.3; letter-spacing: -0.01em; margin-bottom: 1rem; }
.section-sub { font-size: 14px; color: var(--gray-500); line-height: 1.8; max-width: 560px; }
.problem-list { margin-top: 3.5rem; }
.problem-item { display: grid; grid-template-columns: 40px 1fr; gap: 2rem; padding: 2rem 0; border-top: 1px solid var(--gray-100); align-items: start; }
.problem-item:last-child { border-bottom: 1px solid var(--gray-100); }
.problem-num { font-family: var(--serif); font-size: 13px; color: var(--gray-300); padding-top: 3px; }
.problem-title { font-size: 15px; font-weight: 500; margin-bottom: 6px; line-height: 1.5; }
.problem-desc { font-size: 13px; color: var(--gray-500); line-height: 1.75; }
.statement { padding: 5rem 0; border-bottom: 1px solid var(--gray-100); }
.statement-text { font-family: var(--serif); font-size: clamp(1.4rem, 2.8vw, 2rem); font-weight: 300; line-height: 1.65; color: var(--black); max-width: 700px; border-left: 2px solid var(--black); padding-left: 2rem; }
.statement-text strong { font-weight: 600; }
.steps { margin-top: 3.5rem; }
.step { display: grid; grid-template-columns: 40px 1fr; gap: 2rem; padding: 2rem 0; border-top: 1px solid var(--gray-100); align-items: start; }
.step:last-child { border-bottom: 1px solid var(--gray-100); }
.step-num { font-family: var(--serif); font-size: 13px; color: var(--gray-300); padding-top: 3px; }
.step-title { font-size: 15px; font-weight: 500; margin-bottom: 6px; }
.step-desc { font-size: 13px; color: var(--gray-500); line-height: 1.75; }
.step-badge { display: inline-block; font-size: 11px; letter-spacing: 0.06em; color: var(--gray-500); border: 1px solid var(--gray-100); padding: 3px 10px; margin-top: 10px; }
.case-meta { font-size: 12px; letter-spacing: 0.06em; color: var(--gray-500); text-transform: uppercase; margin-bottom: 2.5rem; }
.case-table { width: 100%; border-collapse: collapse; font-size: 13px; }
.case-table th { text-align: left; padding: 10px 0; font-size: 11px; font-weight: 500; letter-spacing: 0.1em; text-transform: uppercase; color: var(--gray-500); border-bottom: 1px solid var(--gray-100); }
.case-table th:not(:first-child) { padding-left: 1.5rem; }
.case-table td { padding: 1.25rem 0; vertical-align: top; border-bottom: 1px solid var(--gray-100); line-height: 1.65; color: var(--gray-700); }
.case-table td:not(:first-child) { padding-left: 1.5rem; }
.case-table td:first-child { color: var(--gray-300); font-size: 11px; width: 80px; padding-top: 1.4rem; font-weight: 500; letter-spacing: 0.06em; text-transform: uppercase; }
.case-table .after { font-weight: 500; color: var(--black); }
.case-result { margin-top: 2.5rem; padding-bottom: 2rem; border-bottom: 1px solid var(--gray-100); display: flex; align-items: baseline; gap: 1rem; }
.case-result-label { font-size: 10px; font-weight: 500; letter-spacing: 0.14em; text-transform: uppercase; color: var(--gray-300); flex-shrink: 0; }
.case-result-text { font-size: 13px; font-weight: 400; color: var(--gray-700); line-height: 1.65; }
.diagnosis-list { margin-top: 3rem; }
.diagnosis-item { display: grid; grid-template-columns: 16px 1fr; gap: 1.5rem; padding: 1.75rem 0; border-top: 1px solid var(--gray-100); align-items: start; }
.diagnosis-item:last-child { border-bottom: 1px solid var(--gray-100); }
.diagnosis-dot { width: 5px; height: 5px; background: var(--black); border-radius: 50%; margin-top: 8px; }
.diagnosis-title { font-size: 14px; font-weight: 500; margin-bottom: 5px; }
.diagnosis-desc { font-size: 13px; color: var(--gray-500); line-height: 1.75; }
.about-grid { display: grid; grid-template-columns: 160px 1fr; gap: 3rem; align-items: start; margin-top: 3rem; }
.about-book { width: 160px; height: 224px; background: var(--gray-100); display: flex; align-items: center; justify-content: center; text-align: center; }
.about-book span { font-size: 11px; color: var(--gray-500); padding: 1rem; line-height: 1.6; }
.about-name { font-family: var(--serif); font-size: 1.2rem; font-weight: 600; margin-bottom: 4px; }
.about-title { font-size: 12px; color: var(--gray-500); letter-spacing: 0.04em; margin-bottom: 1.5rem; }
.about-career { font-size: 13px; color: var(--gray-500); line-height: 1.9; margin-bottom: 2rem; }
.media-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1rem; }
.media-item { text-decoration: none; display: flex; flex-direction: column; gap: 6px; }
.media-item img { width: 100%; height: 80px; object-fit: cover; filter: grayscale(20%); transition: filter 0.2s; }
.media-item:hover img { filter: grayscale(0%); }
.media-label { font-size: 11px; color: var(--gray-500); letter-spacing: 0.04em; }
.packages-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 0; background: var(--white); margin-top: 3rem; border: 1px solid var(--gray-100); }
.package { background: var(--white); padding: 2.5rem; display: flex; flex-direction: column; border-right: 1px solid var(--gray-100); }
.package.featured { background: var(--black); color: var(--white); border-right: none; }
.pkg-tier { font-size: 11px; font-weight: 500; letter-spacing: 0.12em; text-transform: uppercase; color: var(--gray-500); margin-bottom: 1.25rem; }
.package.featured .pkg-tier { color: var(--gray-300); }
.pkg-name { font-family: var(--serif); font-size: 1.5rem; font-weight: 600; line-height: 1.2; margin-bottom: 1rem; letter-spacing: -0.01em; }
.pkg-desc { font-size: 13px; color: var(--gray-500); line-height: 1.8; flex: 1; margin-bottom: 2rem; }
.package.featured .pkg-desc { color: var(--gray-100); }
.pkg-features { list-style: none; margin-bottom: 2rem; border-top: 1px solid var(--gray-100); }
.package.featured .pkg-features { border-top-color: var(--gray-700); }
.pkg-features li { font-size: 12px; padding: 8px 0; border-bottom: 1px solid var(--gray-100); color: var(--gray-700); display: flex; gap: 10px; line-height: 1.5; align-items: flex-start; }
.package.featured .pkg-features li { border-bottom-color: var(--gray-700); color: var(--gray-300); }
.pkg-features li::before { content: '—'; color: var(--gray-300); flex-shrink: 0; font-size: 11px; }
.pkg-price { font-size: 11px; color: var(--gray-500); letter-spacing: 0.06em; margin-bottom: 1.25rem; text-transform: uppercase; }
.pkg-cta-light { display: block; text-align: center; font-size: 12px; font-weight: 500; letter-spacing: 0.06em; color: var(--black); border: 1px solid var(--gray-300); padding: 11px; text-decoration: none; transition: border-color 0.2s; cursor: pointer; background: none; width: 100%; font-family: var(--sans); }
.pkg-cta-light:hover { border-color: var(--black); }
.pkg-cta-dark { display: block; text-align: center; font-size: 12px; font-weight: 500; letter-spacing: 0.06em; color: var(--black); background: var(--white); padding: 11px; text-decoration: none; transition: opacity 0.2s; }
.pkg-cta-dark:hover { opacity: 0.8; }
.cta-section { background: var(--black); padding: 8rem var(--pad); text-align: center; }
.cta-section h2 { font-family: var(--serif); font-size: clamp(1.2rem, 2.2vw, 1.65rem); font-weight: 300; color: var(--white); line-height: 1.45; letter-spacing: -0.01em; margin-bottom: 2.5rem; max-width: 520px; margin-left: auto; margin-right: auto; }
.cta-section p { font-size: 14px; color: var(--gray-500); margin-bottom: 3rem; line-height: 1.75; }
.btn-cta { display: inline-block; font-size: 13px; font-weight: 500; letter-spacing: 0.06em; color: var(--black); background: var(--white); padding: 14px 36px; text-decoration: none; transition: opacity 0.2s; cursor: pointer; border: none; font-family: var(--sans); }
.btn-cta:hover { opacity: 0.85; }

footer p { font-size: 12px; color: var(--gray-500); letter-spacing: 0.02em; }
footer a { color: var(--gray-500); text-decoration: none; }
.modal-overlay { display: none; position: fixed; top: 0; left: 0; width: 100%; height: 100%; background: rgba(0,0,0,0.7); z-index: 1000; align-items: center; justify-content: center; }
.modal-box { background: var(--white); padding: 3rem; max-width: 460px; width: 90%; position: relative; max-height: 90vh; overflow-y: auto; }
.modal-close { position: absolute; top: 1.25rem; right: 1.25rem; background: none; border: none; font-size: 18px; color: var(--gray-500); cursor: pointer; line-height: 1; }
.modal-label { font-size: 11px; font-weight: 500; letter-spacing: 0.12em; text-transform: uppercase; color: var(--gray-500); margin-bottom: 0.75rem; }
.modal-title { font-family: var(--serif); font-size: 1.2rem; font-weight: 400; margin-bottom: 2rem; line-height: 1.4; }
.program-options { display: grid; grid-template-columns: repeat(3, 1fr); gap: 8px; margin-bottom: 1.75rem; }
.program-opt { border: 1px solid var(--gray-100); padding: 1rem; text-align: center; font-size: 12px; font-weight: 500; cursor: pointer; transition: all 0.15s; line-height: 1.5; letter-spacing: 0.02em; }
.program-opt:hover { border-color: var(--black); }
.program-opt.selected { background: var(--black); color: var(--white); border-color: var(--black); }
.form-fields { display: flex; flex-direction: column; gap: 14px; margin-bottom: 1.75rem; }
.field-label { font-size: 11px; font-weight: 500; letter-spacing: 0.08em; text-transform: uppercase; color: var(--gray-500); display: block; margin-bottom: 5px; }
.field-input { width: 100%; padding: 11px 0; border: none; border-bottom: 1px solid var(--gray-100); font-size: 14px; font-family: var(--sans); outline: none; background: transparent; transition: border-color 0.2s; }
.field-input:focus { border-bottom-color: var(--black); }
.field-textarea { width: 100%; padding: 11px 0; border: none; border-bottom: 1px solid var(--gray-100); font-size: 14px; font-family: var(--sans); outline: none; background: transparent; resize: none; transition: border-color 0.2s; }
.field-textarea:focus { border-bottom-color: var(--black); }
.btn-submit { width: 100%; background: var(--black); color: var(--white); border: none; padding: 14px; font-size: 13px; font-weight: 500; letter-spacing: 0.06em; cursor: pointer; font-family: var(--sans); transition: opacity 0.2s; }
.btn-submit:hover { opacity: 0.8; }
.modal-note { font-size: 11px; color: var(--gray-500); text-align: center; margin-top: 0.875rem; letter-spacing: 0.02em; }
@keyframes fadeUp { from { opacity: 0; transform: translateY(24px); } to { opacity: 1; transform: translateY(0); } }
.hero h1 { animation: fadeUp 0.7s ease both; }
.hero-desc { animation: fadeUp 0.7s 0.1s ease both; }
.hero-actions { animation: fadeUp 0.7s 0.2s ease both; }
@media (max-width: 680px) {
  .packages-grid { grid-template-columns: 1fr; gap: 0; }
  .package { border-right: none; border-bottom: 1px solid var(--gray-100); }
  .package.featured { border-bottom: none; }
  .about-grid { grid-template-columns: 1fr; }
  .nav-links .nav-link { display: none; }
  .hero { padding: 6rem 0 5rem; }
  .section { padding: 5rem 0; }
}

/* =============================================
   MOBILE RESPONSIVE — index.html
   Breakpoints: 768px (tablet), 480px (mobile)
   ============================================= */

@media (max-width: 768px) {
  /* Hero */
  .hero { padding: 5rem 0 4rem; }
  .hero h1 { font-size: 1.7rem; }
  .hero-actions { flex-direction: column; align-items: flex-start; gap: 0.75rem; }
  .btn-primary, .btn-secondary { width: 100%; text-align: center; }

  /* Steps - McKinsey mobile: tight number + text */
  .step { grid-template-columns: 28px 1fr; gap: 0.5rem; padding: 1.5rem 0; }
  /* Problem items */
  .problem-item { grid-template-columns: 28px 1fr; gap: 0.75rem; padding: 1.5rem 0; }
  .problem-title { font-size: 14px; }
  .problem-desc { font-size: 13px; }

  /* Case table - McKinsey mobile */
  .case-table { font-size: 13px; width: 100%; border-collapse: collapse; }
  .case-table th { font-size: 11px; padding: 0.75rem 0; }
  .case-table td { font-size: 13px; padding: 1rem 0; line-height: 1.6; }
  .case-table td:first-child { font-size: 11px; width: 60px; vertical-align: top; padding-top: 1rem; }
  .case-table th:not(:first-child), .case-table td:not(:first-child) { padding-left: 0.75rem; }

  /* Diagnosis */
  .diagnosis-item { grid-template-columns: 12px 1fr; gap: 0.75rem; }

  /* About */
  .about-grid { grid-template-columns: 1fr; gap: 2rem; }
  .about-book { width: 120px; height: 168px; }
  .media-grid { grid-template-columns: repeat(3, 1fr); }

  /* Packages */
  .packages-grid { grid-template-columns: 1fr; }
  .package { border-right: none; border-bottom: 1px solid var(--gray-100); }
  .package.featured { border-bottom: none; }

  /* Modal */
  .modal-box { padding: 2rem 1.5rem; }
  .program-options { grid-template-columns: 1fr; }
}

@media (max-width: 480px) {
  :root { --pad: 1.25rem; }
  .hero h1 { font-size: 1.5rem; }
  .hero h1 .sub { font-size: 0.6em; }
  .section { padding: 4rem 0; }
  .section-title { font-size: 1.4rem; }

  /* Statement */
  .statement-text { font-size: 1.2rem; padding-left: 1.25rem; }

  /* Case table — stack on mobile */
  .case-table thead { display: none; }
  .case-table tbody tr { display: block; margin-bottom: 1.5rem; border-bottom: 1px solid var(--gray-100); padding-bottom: 1.5rem; }
  .case-table td { display: block; width: 100% !important; padding: 0.25rem 0 !important; }
  .case-table td:first-child { font-size: 10px; color: var(--gray-300); margin-bottom: 0.25rem; }
  .case-table .after { font-weight: 500; }

  /* Media grid */
  .media-grid { grid-template-columns: repeat(3, 1fr); gap: 0.75rem; }

  /* Packages */
  .package { padding: 2rem 1.5rem; }
  .pkg-name { font-size: 1.3rem; }
}

/* MOBILE NAV FIX */
.nav-hamburger { display: none; flex-direction: column; gap: 5px; cursor: pointer; padding: 4px; background: none; border: none; }
.nav-hamburger span { display: block; width: 22px; height: 1.5px; background: var(--black); }
.nav-mobile-menu { display: none; position: fixed; top: 60px; left: 0; right: 0; background: var(--white); border-bottom: 1px solid var(--gray-100); padding: 1.5rem var(--pad); z-index: 99; flex-direction: column; gap: 0; }
.nav-mobile-menu.open { display: flex; }
.nav-mobile-link { font-size: 14px; color: var(--gray-700); text-decoration: none; padding: 1rem 0; border-bottom: 1px solid var(--gray-100); }
.nav-mobile-link:last-child { border-bottom: none; }
@media (max-width: 768px) {
  .nav-links .nav-link { display: none; }
  .nav-cta { display: none; }
  .nav-hamburger { display: flex; }
}
@media (min-width: 769px) {
  .nav-hamburger { display: none !important; }
  .nav-mobile-menu { display: none !important; }
}

footer {
  padding: 6rem var(--pad) 5rem;
  border-top: 1px solid var(--gray-100);
  display: grid;
  grid-template-columns: 1fr 1fr;
  align-items: end;
  gap: 3rem;
}
.footer-logo { font-family: var(--serif); font-size: 13px; font-weight: 600; letter-spacing: 0.1em; color: var(--black); margin-bottom: 0.5rem; }
.footer-copy { font-size: 11px; color: var(--gray-500); letter-spacing: 0.02em; line-height: 1.8; }
.footer-right { display: flex; flex-direction: column; align-items: flex-end; gap: 1rem; }
.footer-email { font-size: 11px; color: var(--gray-500); text-decoration: none; letter-spacing: 0.04em; transition: color 0.2s; }
.footer-email:hover { color: var(--black); }
.footer-socials { display: flex; align-items: center; gap: 1.5rem; }
.footer-link { font-size: 11px; color: var(--gray-500); text-decoration: none; display: flex; align-items: center; gap: 4px; letter-spacing: 0.04em; transition: color 0.2s; }
.footer-link:hover { color: var(--black); }
.footer-link svg { opacity: 0.6; }
@media (max-width: 640px) {
  footer { grid-template-columns: 1fr; gap: 2rem; padding: 4rem var(--pad) 3rem; }
  .footer-right { align-items: flex-start; }
}
@media (max-width: 768px) {
  .case-link-wrap { justify-content: flex-start !important; }
}

/* CASE STUDY MOBILE CARDS */
.case-mobile-cards { display: none; }
.case-mobile-row { padding: 1.5rem 0; border-top: 1px solid var(--gray-100); }
.case-mobile-row:last-child { border-bottom: 1px solid var(--gray-100); }
.case-mobile-label { font-size: 11px; font-weight: 500; letter-spacing: 0.1em; text-transform: uppercase; color: var(--gray-500); margin-bottom: 1rem; }
.case-mobile-cols { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; }
.case-mobile-before, .case-mobile-after { padding: 1rem; }
.case-mobile-before { background: var(--white); border: 1px solid var(--gray-100); }
.case-mobile-after { background: #F5F5F3; border: 1px solid var(--gray-100); }
.case-mobile-tag { font-size: 10px; font-weight: 500; letter-spacing: 0.1em; text-transform: uppercase; color: var(--gray-300); margin-bottom: 0.5rem; }
.case-mobile-after .case-mobile-tag { color: var(--gray-500); }
.case-mobile-before p:last-child { font-size: 13px; color: var(--gray-500); line-height: 1.65; }
.case-mobile-after p:last-child { font-size: 13px; color: var(--black); font-weight: 500; line-height: 1.65; }

@media (max-width: 768px) {
  .case-table { display: none; }
  .case-mobile-cards { display: block; }
}


/* HERO BOOK CARD — McKinsey style bottom right */
.hero-book-card {
  position: absolute;
  bottom: 4rem;
  right: var(--pad);
  display: flex;
  align-items: center;
  gap: 1rem;
  max-width: 260px;
}
.hero-book-img {
  width: 52px;
  height: 72px;
  background: #1a1a1a;
  flex-shrink: 0;
  overflow: hidden;
}
.hero-book-img img { width: 100%; height: 100%; object-fit: cover; }
.hero-book-label { font-size: 10px; font-weight: 500; letter-spacing: 0.12em; text-transform: uppercase; color: #888884; margin-bottom: 0.3rem; }
.hero-book-title { font-size: 13px; font-weight: 500; color: var(--white); line-height: 1.4; margin-bottom: 0.2rem; }
.hero-book-sub { font-size: 11px; color: #888884; line-height: 1.4; }
@media (max-width: 768px) {
  .hero-book-card { display: none; }
  .hero h1 { font-size: clamp(2rem, 8vw, 2.8rem); }
}