/* ================================================================
   Core Company — 공통 스타일 (Phase 1)
   기준: core-company-design-direction.md §3.1 (컬러), §3.2 (타이포)
   ================================================================ */

/* ----- CSS 변수: 브랜드 컬러 9종 (design §3.1) ----- */
:root {
  --color-orange:    #E8620A;   /* Core Orange — CTA·강조 */
  --color-purple:    #8B3AC8;   /* Core Purple — 기술·혁신 포인트 */
  --color-blue:      #1E56C8;   /* Core Blue — 신뢰·보안 */
  --color-warmwhite: #F8F7F4;   /* Warm White — 기본 배경 */
  --color-black:     #1A1917;   /* Black — 다크 섹션·푸터·본문 */
  --color-teal:      #0F7A5A;   /* Teal — 규제·컴플라이언스 */
  --color-amber:     #B86A00;   /* Amber — 비용·ROI */
  --color-coral:     #C43A1A;   /* Coral — 주의 경고 (제한적) */
  --color-green:     #3A6D11;   /* Green — 성공·체크 */
}

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

/* ----- 타이포그래피 (design §3.2) ----- */
body {
  font-family: "Noto Sans KR", sans-serif;
  font-size: 14px;          /* Body */
  font-weight: 400;
  line-height: 1.7;
  color: var(--color-black);
  background: var(--color-warmwhite);
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3 { font-family: "Noto Sans KR", sans-serif; }

h1 { font-size: 28px; font-weight: 700; }   /* H1 §3.2 */
h2 { font-size: 17px; font-weight: 700; }   /* H2 §3.2 */

/* Caption — 메타 정보 */
.caption, .meta-text {
  font-family: "Noto Sans KR", sans-serif;
  font-size: 11px;
  font-weight: 400;
  letter-spacing: 0.06em;
}

/* Mono — 수치·코드·영문 레이블 */
.mono, .data-value, code {
  font-family: "DM Mono", monospace;
  font-size: 14px;
  font-weight: 400;
}
.mono-sm { font-size: 11px; font-weight: 500; }

/* ----- 링크 ----- */
a { color: var(--color-orange); text-decoration: none; }
a:hover { text-decoration: underline; }

/* ----- 레이아웃 ----- */
.container {
  width: 100%;
  max-width: 1140px;          /* design §5 데스크탑 */
  margin: 0 auto;
  padding: 0 24px;
}
.container-narrow {
  max-width: 680px;           /* design §1.3 */
}

/* ----- 섹션 공통 ----- */
section, footer {
  padding: 80px 0;
}

/* 섹션 배경 변형 */
.section-light  { background: var(--color-warmwhite); }
.section-white  { background: #FFFFFF; }
.section-dark   { background: var(--color-black); color: var(--color-warmwhite); }

/* ----- 섹션별 그리드 (골격만) ----- */
.hero-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  align-items: center;
  gap: 48px;
  min-height: 100vh;          /* design §1.1 */
}

.promise-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
}

.tech-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
}

.inquiry-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 32px;
}

/* ----- 내비게이션 (고정) ----- */
#site-nav {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 100;
  background: var(--color-black);
  padding: 14px 0;
}
#site-nav .nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
}
#site-nav .nav-logo {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 2px;
  color: #FFFFFF;
  font-family: "DM Mono", monospace;
  font-size: 14px;
  font-weight: 500;
  letter-spacing: 0.06em;
  text-decoration: none;
}
#site-nav .nav-logo-img {
  height: 42px;
  width: auto;
  display: block;
}
#site-nav .nav-logo-text {
  font-family: "DM Mono", monospace;
  font-size: 12px;
  font-weight: 500;
  color: #FFFFFF;
  letter-spacing: 0.06em;
  margin-left: 8px;
  white-space: nowrap;
}
#site-nav .nav-logo-text small {
  font-size: 10px;
  font-weight: 400;
  color: var(--color-warmwhite);
  opacity: 0.7;
  margin-left: 6px;
}
#site-nav .nav-links {
  display: flex;
  list-style: none;
  gap: 24px;
}
#site-nav .nav-links a {
  color: var(--color-warmwhite);
  font-size: 13px;
  opacity: 0.8;
}
#site-nav .nav-links a:hover { opacity: 1; text-decoration: none; }
#site-nav .nav-cta {
  background: var(--color-orange);
  color: #FFFFFF !important;
  padding: 8px 16px;
  border-radius: 4px;
  font-weight: 700;
}

/* ----- CTA 버튼 ----- */
.btn-cta {
  display: inline-block;
  background: var(--color-orange);
  color: #FFFFFF;
  font-size: 16px;
  font-weight: 700;
  padding: 14px 32px;
  border-radius: 4px;
  border: none;
  cursor: pointer;
  min-height: 48px;           /* design §1.6 */
}
.btn-cta:hover { opacity: 0.92; text-decoration: none; }

/* ----- 유틸리티 ----- */
.text-center { text-align: center; }
.sr-only { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0,0,0,0); }

/* ================================================================
   섹션별 스타일
   ================================================================ */

/* ----- Hero (§1.1) ----- */
.section-hero {
  position: relative;
  background-image: url('../assets/img/hero_bg_4.png');
  background-size: cover;
  background-position: center;
  color: #FFFFFF;
  padding: 0;                    /* hero-grid가 100vh를 가지므로 */
}
.section-hero::before {          /* 좌측 다크 오버레이 = 흰 카피 가독성 */
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg,
    #1A1917 0%,
    rgba(26,25,23,0.78) 35%,
    transparent 60%);
  pointer-events: none;
}
.section-hero > * {              /* 콘텐츠를 오버레이 위로 */
  position: relative;
  z-index: 1;
}

.hero-headline {
  font-size: 28px;
  font-weight: 700;
  color: #FFFFFF;
  line-height: 1.4;
  margin-bottom: 16px;
}

.hero-subhead {
  font-size: 17px;
  font-weight: 400;
  color: var(--color-warmwhite);
  opacity: 0.85;
  margin-bottom: 20px;
}

.hero-caption {
  color: #F8F7F4;
  font-weight: 700;
  letter-spacing: 0.06em;
  margin-bottom: 32px;
  text-shadow: 0 2px 8px rgba(26,25,23,0.8);
}

.hero-expansion {
  text-align: center;
  padding: 24px 0 40px;
  color: var(--color-warmwhite);
  opacity: 0.4;
}

/* ----- Promise (§1.2) ----- */
.section-title {
  font-size: 17px;
  font-weight: 700;
  color: var(--color-blue);
  margin-bottom: 24px;
}

.promise-body {
  font-size: 14px;
  line-height: 1.7;
  color: var(--color-black);
  margin-bottom: 16px;
}

.diagram-placeholder {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  aspect-ratio: 2 / 1;
  background: #FFFFFF;
  border: 1px dashed #CCC;
  border-radius: 8px;
}

.diagram-label {
  font-size: 14px;
  color: var(--color-blue);
  font-weight: 500;
}

/* ----- Tech (§1.5) ----- */
.tech-col {
  padding: 32px 24px;
  text-align: center;
}

.tech-icon {
  width: 48px;
  height: 48px;
  margin: 0 auto 16px;
  border-radius: 8px;
  background: var(--color-purple);
  opacity: 0.15;
}

.tech-col-title {
  font-size: 15px;
  font-weight: 700;
  color: var(--color-black);
  margin-bottom: 12px;
}

.tech-col-desc {
  font-size: 14px;
  line-height: 1.7;
  color: var(--color-black);
  margin-bottom: 16px;
}

.tech-link {
  font-size: 13px;
  font-weight: 700;
  color: var(--color-purple);
}

/* ----- Footer (§1.7) ----- */
.footer-logo-text {
  font-family: "DM Mono", monospace;
  font-size: 14px;
  font-weight: 500;
  color: #FFFFFF;
  letter-spacing: 0.06em;
  margin-bottom: 8px;
}

.footer-logo-block {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 4px;
  margin-bottom: 12px;
}
.footer-logo-img {
  height: 64px;
  width: auto;
  display: block;
  margin-bottom: 8px;
}
.footer-logo-text {
  display: flex;
  flex-direction: column;
}
.footer-brand-name {
  font-family: "DM Mono", monospace;
  font-size: 15px;
  font-weight: 500;
  color: #FFFFFF;
  letter-spacing: 0.08em;
}
.footer-brand-sub {
  font-family: "DM Mono", monospace;
  font-size: 11px;
  font-weight: 400;
  color: var(--color-warmwhite);
  opacity: 0.7;
  letter-spacing: 0.06em;
  margin-top: 2px;
}

.footer-slogan {
  color: var(--color-warmwhite);
  opacity: 0.7;
}

.footer-link {
  display: block;
  font-size: 13px;
  color: var(--color-warmwhite);
  opacity: 0.7;
  margin-bottom: 6px;
}
.footer-link:hover { opacity: 1; }

.footer-bottom {
  margin-top: 48px;
  padding-top: 24px;
  border-top: 1px solid rgba(255,255,255,0.1);
}

/* ----- Compliance (§1.3) ----- */
.compliance-title {
  color: var(--color-teal);
}

.compliance-sub {
  font-size: 14px;
  line-height: 1.7;
  color: var(--color-black);
  margin-bottom: 32px;
}

.compliance-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
  margin-bottom: 24px;
}

.compliance-table th {
  padding: 12px 16px;
  font-size: 13px;
  font-weight: 700;
  text-align: left;
  border-bottom: 2px solid var(--color-teal);
}

.comp-co {
  color: var(--color-teal);
  background: #F0FDF6;
}

.comp-client {
  color: #666;
  background: #F9FAFB;
}

.compliance-table td {
  padding: 10px 16px;
  border-bottom: 1px solid #E5E7EB;
  vertical-align: top;
}

.compliance-note {
  font-size: 11px;
  color: #999;
  line-height: 1.6;
}

/* ----- References (§1.4) ----- */
.ref-scroll {
  display: flex;
  gap: 24px;
  overflow-x: auto;
  padding: 0 24px 16px;
  scroll-snap-type: x mandatory;
  -webkit-overflow-scrolling: touch;
}

.ref-card {
  flex: 0 0 320px;
  scroll-snap-align: start;
  background: #FFFFFF;
  border-radius: 8px;
  overflow: hidden;
  box-shadow: 0 1px 4px rgba(0,0,0,0.06);
}

.ref-bar {
  height: 4px;
  width: 100%;
}

.ref-bar-amber { background: var(--color-amber); }
.ref-bar-coral { background: var(--color-coral); }
.ref-bar-green { background: var(--color-green); }
.ref-bar-teal  { background: var(--color-teal); }

.ref-body {
  padding: 20px;
}

.ref-icon {
  width: 36px;
  height: 36px;
  margin-bottom: 12px;
  border-radius: 6px;
  background: #F3F4F6;
}

.ref-industry {
  font-size: 15px;
  font-weight: 700;
  color: var(--color-black);
  margin-bottom: 10px;
}

.ref-problem,
.ref-solution {
  font-size: 13px;
  line-height: 1.65;
  color: var(--color-black);
  margin-bottom: 8px;
}

.ref-solution {
  color: var(--color-teal);
}

.ref-roi {
  margin-top: 12px;
  padding-top: 10px;
  border-top: 1px solid #E5E7EB;
  font-size: 12px;
  color: #999;
}

/* ----- Inquiry (§1.6) ----- */
.inq-form {
  width: 100%;
}

.inq-step {
  border: none;
  padding: 0;
  margin-bottom: 28px;
}

.inq-legend {
  font-size: 13px;
  font-weight: 700;
  color: var(--color-orange);
  padding-bottom: 8px;
  margin-bottom: 16px;
  border-bottom: 1px solid rgba(255,255,255,0.1);
  width: 100%;
}

.inq-field {
  margin-bottom: 14px;
}

.inq-label {
  display: block;
  font-size: 12px;
  font-weight: 700;
  color: var(--color-warmwhite);
  margin-bottom: 4px;
}

.inq-required {
  color: var(--color-orange);
}

.inq-input {
  width: 100%;
  padding: 10px 12px;
  font-size: 14px;
  font-family: "Noto Sans KR", sans-serif;
  color: var(--color-black);
  background: #FFFFFF;
  border: 1px solid #444;
  border-radius: 4px;
  outline: none;
  transition: border-color 0.2s;
}

.inq-input:focus {
  border-color: var(--color-orange);
}

.inq-input::placeholder {
  color: #999;
}

textarea.inq-input {
  resize: vertical;
}

/* 개인정보 동의 */
.inq-consent {
  margin: 24px 0;
}

.inq-checkbox {
  display: flex;
  align-items: flex-start;
  gap: 8px;
  font-size: 13px;
  color: var(--color-warmwhite);
  cursor: pointer;
  margin-bottom: 4px;
}

.inq-checkbox input[type="checkbox"] {
  margin-top: 3px;
  accent-color: var(--color-orange);
}

.inq-legal {
  font-size: 11px;
  opacity: 0.6;
}

.inq-consent-note {
  font-size: 11px;
  color: var(--color-warmwhite);
  opacity: 0.4;
  margin: 4px 0 16px 24px;
  line-height: 1.5;
}

.inq-privacy-link {
  display: inline-block;
  font-size: 11px;
  color: var(--color-warmwhite);
  opacity: 0.5;
  margin-top: 8px;
}

.inq-privacy-link:hover { opacity: 1; }

.btn-cta-full {
  width: 100%;
  text-align: center;
  font-size: 16px;
}

/* 우측: 프로세스 */
.inq-process {
  margin-bottom: 32px;
}

.inq-process-step {
  display: flex;
  align-items: baseline;
  gap: 12px;
  margin-bottom: 16px;
}

.inq-step-num {
  font-size: 18px;
  font-weight: 500;
  color: var(--color-orange);
  opacity: 0.5;
  min-width: 28px;
}

.inq-process-step p {
  font-size: 14px;
  color: var(--color-warmwhite);
  line-height: 1.5;
}

.inq-process-step strong {
  color: #FFFFFF;
}

.inq-contact {
  padding-top: 24px;
  border-top: 1px solid rgba(255,255,255,0.1);
}

/* ================================================================
   반응형 (design §5)
   ================================================================ */

/* 태블릿: 2컬럼 유지, 폰트 10% 축소 */
@media (max-width: 900px) {
  body { font-size: 12.6px; }
  h1 { font-size: 25.2px; }
  h2 { font-size: 15.3px; }
  .hero-grid,
  .promise-grid,
  .inquiry-grid { grid-template-columns: 1fr; }
  .tech-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  section, footer { padding: 60px 0; }
}

/* 모바일: 싱글 컬럼 */
@media (max-width: 600px) {
  h1 { font-size: 22px; }     /* design §5 */
  h2 { font-size: 15px; }     /* design §5 */
  .container { padding: 0 16px; }
  .tech-grid,
  .footer-grid { grid-template-columns: 1fr; }
  #site-nav .nav-links { gap: 12px; }
  #site-nav .nav-links a { font-size: 11px; }
  section, footer { padding: 48px 0; }
}