/* ==========================================================================
   DIDIM UNMANNED BILLIARDS — MAIN STYLESHEET
   Editorial B2B Layout, Hairline Tables, Technical Schematics & P&L Ledger
   ========================================================================== */

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-sans);
  background-color: var(--bg-page);
  color: var(--ink-primary);
  line-height: 1.65;
  letter-spacing: -0.025em;
  word-break: keep-all;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  transition: background-color 0.2s ease, color 0.2s ease;
}

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

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

button,
input,
select,
textarea {
  font: inherit;
  color: inherit;
  letter-spacing: inherit;
}

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

.num,
.mono {
  font-variant-numeric: tabular-nums;
}

.mono {
  font-family: var(--font-mono);
  letter-spacing: -0.01em;
}

.container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding-left: var(--gutter);
  padding-right: var(--gutter);
}

/* --------------------------------------------------------------------------
   Top Official Notice Micro-Strip
   -------------------------------------------------------------------------- */
.top-notice {
  border-bottom: 1px solid var(--line-hair);
  background-color: var(--bg-surface);
  font-size: 0.78rem;
  line-height: 1.4;
}

.top-notice__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding-top: 9px;
  padding-bottom: 9px;
  flex-wrap: wrap;
}

.top-notice__left {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}

.top-notice__tag {
  font-weight: 700;
  color: var(--accent-bronze);
}

.top-notice__sep {
  color: var(--line-mid);
}

.top-notice__desc {
  color: var(--ink-secondary);
}

.top-notice__right {
  display: flex;
  align-items: center;
  gap: 16px;
  color: var(--ink-secondary);
}

.theme-switch-btn {
  font-size: 0.75rem;
  color: var(--ink-muted);
  border: 1px solid var(--line-hair);
  padding: 3px 9px;
  border-radius: var(--radius-sharp);
  transition: border-color 0.15s ease, color 0.15s ease;
}

.theme-switch-btn:hover {
  border-color: var(--ink-primary);
  color: var(--ink-primary);
}

/* --------------------------------------------------------------------------
   Sticky Header (GNB)
   -------------------------------------------------------------------------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 40;
  background-color: var(--bg-header);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line-hair);
}

.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 68px;
  gap: 24px;
}

.brand-mark {
  display: inline-flex;
  align-items: center;
  gap: 12px;
}

.brand-mark__en {
  font-size: 1.15rem;
  font-weight: 900;
  letter-spacing: -0.04em;
}

.brand-mark__divider {
  width: 1px;
  height: 14px;
  background-color: var(--line-mid);
}

.brand-mark__ko {
  font-size: 0.92rem;
  font-weight: 600;
  color: var(--ink-secondary);
}

.gnb-nav {
  display: flex;
  align-items: center;
  gap: 32px;
}

.gnb-nav__link {
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--ink-secondary);
  transition: color 0.15s ease;
}

.gnb-nav__link:hover {
  color: var(--ink-primary);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 10px;
}

.mobile-menu-btn {
  display: none;
  padding: 8px;
  border: 1px solid var(--line-hair);
  border-radius: var(--radius-sharp);
}

.mobile-drawer {
  display: none;
  border-top: 1px solid var(--line-hair);
  background-color: var(--bg-surface);
  padding: 16px var(--gutter) 24px;
}

.mobile-drawer.is-open {
  display: block;
}

.mobile-drawer__list {
  list-style: none;
  display: flex;
  flex-direction: column;
}

.mobile-drawer__item a {
  display: block;
  padding: 13px 0;
  border-bottom: 1px solid var(--line-hair);
  font-size: 0.96rem;
  font-weight: 600;
}

/* --------------------------------------------------------------------------
   Buttons
   -------------------------------------------------------------------------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 13px 22px;
  font-size: 0.88rem;
  font-weight: 600;
  line-height: 1;
  border-radius: var(--radius-subtle);
  transition: background-color 0.15s ease, border-color 0.15s ease, opacity 0.15s ease;
  white-space: nowrap;
}

.btn--sm {
  padding: 10px 16px;
  font-size: 0.82rem;
}

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

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

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

.btn--outline:hover {
  background-color: var(--bg-subtle);
}

.btn--band {
  border: 1px solid rgba(243, 242, 238, 0.35);
  color: var(--ink-on-band);
}

.btn--band:hover {
  border-color: var(--ink-on-band);
  background-color: rgba(255, 255, 255, 0.06);
}

/* --------------------------------------------------------------------------
   Section Scaffolding & Editorial Grid
   -------------------------------------------------------------------------- */
.section {
  padding-top: var(--section-y);
  padding-bottom: var(--section-y);
  border-top: 1px solid var(--line-hair);
}

.section--surface {
  background-color: var(--bg-surface);
}

.section--band {
  background-color: var(--bg-band);
  color: var(--ink-on-band);
  border-top-color: var(--line-on-band);
}

.editorial-head {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: 24px;
  margin-bottom: clamp(36px, 5vw, 56px);
  align-items: end;
}

.editorial-head__main {
  grid-column: span 7;
}

.editorial-head__side {
  grid-column: span 5;
  color: var(--ink-secondary);
  font-size: 0.94rem;
  line-height: 1.7;
}

.section--band .editorial-head__side {
  color: var(--ink-on-band-muted);
}

.section-index {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.76rem;
  color: var(--ink-muted);
  margin-bottom: 10px;
  letter-spacing: 0.04em;
}

.section--band .section-index {
  color: var(--ink-on-band-muted);
}

.section-title {
  font-size: clamp(1.65rem, 3vw, 2.35rem);
  font-weight: 700;
  line-height: 1.25;
  letter-spacing: -0.035em;
}

/* --------------------------------------------------------------------------
   Hero Section
   -------------------------------------------------------------------------- */
.hero {
  padding-top: clamp(48px, 7vw, 88px);
  padding-bottom: clamp(56px, 7vw, 92px);
}

.hero__top {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: 32px;
  align-items: end;
  margin-bottom: clamp(36px, 5vw, 56px);
}

.hero__headline-wrap {
  grid-column: span 7;
}

.hero__kicker {
  display: inline-block;
  font-size: 0.84rem;
  font-weight: 700;
  color: var(--accent-bronze);
  padding-bottom: 6px;
  border-bottom: 1px solid var(--accent-bronze);
  margin-bottom: 20px;
}

.hero__title {
  font-size: clamp(2.15rem, 4.4vw, 3.55rem);
  font-weight: 700;
  line-height: 1.18;
  letter-spacing: -0.04em;
}

.hero__summary-wrap {
  grid-column: span 5;
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.hero__lead {
  font-size: 0.98rem;
  line-height: 1.75;
  color: var(--ink-secondary);
}

.hero__cta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

/* Hero Visual Frame (Space Photography + Architectural Caption) */
.hero-visual {
  border: 1px solid var(--line-hair);
  background-color: var(--bg-surface);
  margin-bottom: 40px;
}

.hero-visual__media {
  position: relative;
  width: 100%;
  aspect-ratio: 16 / 7.5;
  overflow: hidden;
  background-color: #16191C;
}

.hero-visual__media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
}

.hero-visual__caption-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 14px 20px;
  border-top: 1px solid var(--line-hair);
  font-size: 0.8rem;
  color: var(--ink-secondary);
  flex-wrap: wrap;
}

/* 4-Column Hairline Fact Strip */
.fact-strip {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 28px;
}

.fact-item {
  border-top: 1px solid var(--line-mid);
  padding-top: 18px;
}

.fact-item__label {
  font-size: 0.78rem;
  color: var(--ink-muted);
  margin-bottom: 6px;
}

.fact-item__value {
  font-size: clamp(1.45rem, 2.3vw, 1.95rem);
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -0.03em;
  margin-bottom: 6px;
}

.fact-item__note {
  font-size: 0.82rem;
  color: var(--ink-secondary);
}

/* --------------------------------------------------------------------------
   Patent & System Integrity Callout Strip
   -------------------------------------------------------------------------- */
.patent-dossier {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  border-top: 2px solid var(--line-strong);
  border-bottom: 1px solid var(--line-hair);
  border-left: 1px solid var(--line-hair);
  border-right: 1px solid var(--line-hair);
  background-color: var(--bg-surface);
  margin-top: 48px;
}

.patent-dossier__head {
  grid-column: span 4;
  padding: 28px 32px;
  border-right: 1px solid var(--line-hair);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: 16px;
}

.patent-dossier__status {
  display: inline-block;
  align-self: flex-start;
  font-size: 0.76rem;
  font-weight: 700;
  color: var(--accent-bronze);
  background-color: var(--accent-bronze-soft);
  padding: 5px 10px;
  border-radius: var(--radius-sharp);
}

.patent-dossier__title {
  font-size: 1.22rem;
  font-weight: 700;
  line-height: 1.38;
}

.patent-dossier__meta {
  font-size: 0.78rem;
  color: var(--ink-muted);
  font-family: var(--font-mono);
}

.patent-dossier__body {
  grid-column: span 8;
  padding: 28px 32px;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}

.patent-point__title {
  font-size: 0.95rem;
  font-weight: 700;
  margin-bottom: 8px;
}

.patent-point__desc {
  font-size: 0.86rem;
  color: var(--ink-secondary);
  line-height: 1.7;
}

/* --------------------------------------------------------------------------
   Section 01: 4-Pillar System Specification & Technical Schematic
   -------------------------------------------------------------------------- */
.spec-layout {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: 36px;
  align-items: start;
}

.spec-sidebar {
  grid-column: span 4;
  position: sticky;
  top: 96px;
}

.spec-nav {
  margin-top: 28px;
  border-top: 1px solid var(--line-hair);
}

.spec-nav__btn {
  width: 100%;
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  padding: 16px 4px;
  border-bottom: 1px solid var(--line-hair);
  text-align: left;
  color: var(--ink-muted);
  transition: color 0.15s ease, padding-left 0.15s ease;
}

.spec-nav__btn:hover {
  color: var(--ink-primary);
}

.spec-nav__btn.is-active {
  color: var(--ink-primary);
  font-weight: 700;
  border-bottom: 2px solid var(--line-strong);
}

.spec-nav__idx {
  font-family: var(--font-mono);
  font-size: 0.76rem;
  margin-right: 12px;
}

.spec-nav__name {
  flex: 1;
  font-size: 0.96rem;
}

.spec-nav__arrow {
  font-family: var(--font-mono);
  font-size: 0.85rem;
}

.spec-detail {
  grid-column: span 8;
  border: 1px solid var(--line-hair);
  background-color: var(--bg-surface);
}

/* Technical UI Wireframe Schematic Box */
.schematic-stage {
  background-color: var(--diagram-bg);
  border-bottom: 1px solid var(--line-hair);
  padding: 28px;
}

.schematic-frame {
  border: 1px solid var(--diagram-stroke);
  background-color: var(--diagram-box);
  padding: 22px;
}

.schematic-topbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-bottom: 12px;
  margin-bottom: 18px;
  border-bottom: 1px solid var(--line-hair);
  font-size: 0.76rem;
  font-family: var(--font-mono);
  color: var(--ink-muted);
}

.schematic-grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
}

.schematic-grid-4 {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 10px;
}

.schematic-cell {
  border: 1px solid var(--diagram-stroke);
  padding: 14px;
  font-size: 0.8rem;
}

.schematic-cell--highlight {
  border-color: var(--diagram-active);
  background-color: var(--accent-forest-soft);
}

.schematic-cell__kicker {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--ink-muted);
  margin-bottom: 4px;
}

.schematic-cell__title {
  font-weight: 700;
  font-size: 0.86rem;
  margin-bottom: 4px;
}

.schematic-cell__sub {
  font-size: 0.76rem;
  color: var(--ink-secondary);
  line-height: 1.5;
}

.spec-sheet {
  padding: 32px;
}

.spec-sheet__code {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--accent-bronze);
  margin-bottom: 8px;
}

.spec-sheet__title {
  font-size: 1.4rem;
  font-weight: 700;
  line-height: 1.35;
  margin-bottom: 14px;
}

.spec-sheet__desc {
  font-size: 0.94rem;
  color: var(--ink-secondary);
  line-height: 1.75;
  margin-bottom: 28px;
}

.spec-dl {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  border-top: 1px solid var(--line-hair);
  padding-top: 22px;
}

.spec-dl__dt {
  font-size: 0.76rem;
  color: var(--ink-muted);
  margin-bottom: 6px;
}

.spec-dl__dd {
  font-size: 0.86rem;
  font-weight: 600;
  line-height: 1.55;
}

/* --------------------------------------------------------------------------
   Section 02: 5-Step Unmanned Operation Sequence
   -------------------------------------------------------------------------- */
.flow-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  border-top: 2px solid var(--line-strong);
  border-left: 1px solid var(--line-hair);
}

.flow-step {
  border-right: 1px solid var(--line-hair);
  border-bottom: 1px solid var(--line-hair);
  padding: 24px 20px;
  background-color: var(--bg-surface);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: 18px;
}

.flow-step__num {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--accent-bronze);
  font-weight: 600;
}

.flow-step__title {
  font-size: 1.02rem;
  font-weight: 700;
  margin-top: 6px;
  margin-bottom: 10px;
}

.flow-step__user {
  font-size: 0.84rem;
  color: var(--ink-secondary);
  line-height: 1.65;
}

.flow-step__sys {
  border-top: 1px solid var(--line-hair);
  padding-top: 12px;
  font-size: 0.78rem;
  color: var(--ink-primary);
}

.flow-step__sys-label {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  color: var(--ink-muted);
  margin-bottom: 4px;
}

/* --------------------------------------------------------------------------
   Section 03: Editorial Comparison Table
   -------------------------------------------------------------------------- */
.table-scroll {
  width: 100%;
  overflow-x: auto;
}

.editorial-table {
  width: 100%;
  min-width: 680px;
  border-collapse: collapse;
  border-top: 2px solid var(--line-strong);
  font-size: 0.9rem;
}

.editorial-table th,
.editorial-table td {
  padding: 18px 16px;
  border-bottom: 1px solid var(--line-hair);
  text-align: left;
  vertical-align: top;
}

.editorial-table thead th {
  font-size: 0.82rem;
  font-weight: 700;
  color: var(--ink-secondary);
  background-color: var(--bg-subtle);
}

.editorial-table thead th.is-didim {
  color: var(--ink-primary);
  background-color: var(--accent-forest-soft);
}

.editorial-table tbody td.col-topic {
  font-weight: 700;
  width: 18%;
}

.editorial-table tbody td.col-other {
  color: var(--ink-secondary);
  width: 26%;
}

.editorial-table tbody td.col-didim {
  font-weight: 600;
  background-color: var(--accent-forest-soft);
  width: 30%;
}

/* --------------------------------------------------------------------------
   Section 04: P&L Statement Profit Simulator
   -------------------------------------------------------------------------- */
.pnl-layout {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: 40px;
  align-items: start;
}

.pnl-controls {
  grid-column: span 5;
  display: flex;
  flex-direction: column;
  gap: 26px;
}

.slider-field {
  border-bottom: 1px solid var(--line-hair);
  padding-bottom: 20px;
}

.slider-field__top {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  margin-bottom: 12px;
}

.slider-field__label {
  font-size: 0.9rem;
  font-weight: 600;
}

.slider-field__val {
  font-family: var(--font-mono);
  font-size: 1.12rem;
  font-weight: 700;
}

input[type="range"].arch-slider {
  -webkit-appearance: none;
  appearance: none;
  width: 100%;
  height: 2px;
  background: var(--line-mid);
  outline: none;
}

input[type="range"].arch-slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 16px;
  height: 16px;
  background: var(--ink-primary);
  border: 2px solid var(--bg-page);
  cursor: pointer;
}

input[type="range"].arch-slider::-moz-range-thumb {
  width: 16px;
  height: 16px;
  background: var(--ink-primary);
  border: 2px solid var(--bg-page);
  border-radius: 0;
  cursor: pointer;
}

.slider-field__ticks {
  display: flex;
  justify-content: space-between;
  margin-top: 8px;
  font-size: 0.74rem;
  font-family: var(--font-mono);
  color: var(--ink-muted);
}

.pnl-statement {
  grid-column: span 7;
  background-color: var(--bg-surface);
  border-top: 2px solid var(--line-strong);
  border-left: 1px solid var(--line-hair);
  border-right: 1px solid var(--line-hair);
  border-bottom: 1px solid var(--line-hair);
  padding: clamp(24px, 4vw, 40px);
}

.pnl-statement__head {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--line-hair);
  margin-bottom: 20px;
}

.pnl-statement__title {
  font-size: 1.05rem;
  font-weight: 700;
}

.pnl-statement__unit {
  font-size: 0.76rem;
  font-family: var(--font-mono);
  color: var(--ink-muted);
}

.pnl-rows {
  display: flex;
  flex-direction: column;
  gap: 13px;
}

.pnl-row {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 16px;
  font-size: 0.92rem;
}

.pnl-row--sub {
  color: var(--ink-secondary);
}

.pnl-row--total {
  border-top: 1px solid var(--line-hair);
  padding-top: 14px;
  margin-top: 4px;
  font-weight: 700;
}

.pnl-row__hint {
  font-size: 0.78rem;
  color: var(--ink-muted);
  font-weight: 400;
}

/* Ratio Bar */
.pnl-bar-wrap {
  margin-top: 24px;
  margin-bottom: 24px;
}

.pnl-bar {
  display: flex;
  width: 100%;
  height: 8px;
  background-color: var(--bg-subtle);
  overflow: hidden;
}

.pnl-bar__net {
  background-color: var(--accent-forest);
  height: 100%;
  transition: width 0.2s ease;
}

.pnl-bar__cost {
  background-color: var(--line-mid);
  height: 100%;
  transition: width 0.2s ease;
}

.pnl-bar-legend {
  display: flex;
  justify-content: space-between;
  font-size: 0.76rem;
  color: var(--ink-muted);
  margin-top: 8px;
}

.pnl-net-box {
  border-top: 2px solid var(--line-strong);
  padding-top: 22px;
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  gap: 20px;
  flex-wrap: wrap;
}

.pnl-net-box__label {
  font-size: 0.82rem;
  color: var(--ink-secondary);
  margin-bottom: 4px;
}

.pnl-net-box__amount {
  font-family: var(--font-mono);
  font-size: clamp(2rem, 3.6vw, 2.75rem);
  font-weight: 700;
  line-height: 1.1;
  color: var(--accent-forest);
}

.pnl-net-box__margin {
  text-align: right;
}

.pnl-net-box__margin-val {
  font-family: var(--font-mono);
  font-size: 1.45rem;
  font-weight: 700;
}

.pnl-footnote {
  margin-top: 20px;
  padding-top: 16px;
  border-top: 1px solid var(--line-hair);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
}

.pnl-footnote__text {
  font-size: 0.78rem;
  color: var(--ink-muted);
  line-height: 1.6;
  flex: 1;
  min-width: 240px;
}

/* --------------------------------------------------------------------------
   Section 05: Dark Band — Two-Track Partnership + Hardware Space Photo
   -------------------------------------------------------------------------- */
.tracks-grid {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  border-top: 1px solid var(--line-on-band);
  border-left: 1px solid var(--line-on-band);
}

.track-card {
  grid-column: span 4;
  padding: 36px 30px;
  border-right: 1px solid var(--line-on-band);
  border-bottom: 1px solid var(--line-on-band);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: 28px;
}

.track-photo-col {
  grid-column: span 4;
  border-right: 1px solid var(--line-on-band);
  border-bottom: 1px solid var(--line-on-band);
  display: flex;
  flex-direction: column;
  background-color: var(--bg-band-elevated);
}

.track-photo-col__img {
  flex: 1;
  min-height: 240px;
  overflow: hidden;
}

.track-photo-col__img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.track-photo-col__cap {
  padding: 14px 20px;
  border-top: 1px solid var(--line-on-band);
  font-size: 0.76rem;
  color: var(--ink-on-band-muted);
}

.track-card__tag {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--ink-on-band-muted);
  margin-bottom: 12px;
}

.track-card__title {
  font-size: 1.32rem;
  font-weight: 700;
  line-height: 1.35;
  margin-bottom: 14px;
}

.track-card__desc {
  font-size: 0.88rem;
  color: var(--ink-on-band-muted);
  line-height: 1.75;
  margin-bottom: 20px;
}

.track-card__list {
  list-style: none;
  border-top: 1px solid var(--line-on-band);
  padding-top: 16px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  font-size: 0.83rem;
  color: var(--ink-on-band);
}

/* --------------------------------------------------------------------------
   Section 06: Process (6 Steps) & Investment Cost Table
   -------------------------------------------------------------------------- */
.process-row {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 20px;
  margin-bottom: 56px;
}

.process-item {
  border-top: 1px solid var(--line-mid);
  padding-top: 16px;
}

.process-item__step {
  font-family: var(--font-mono);
  font-size: 0.74rem;
  color: var(--ink-muted);
  margin-bottom: 6px;
}

.process-item__title {
  font-size: 0.98rem;
  font-weight: 700;
  margin-bottom: 6px;
}

.process-item__desc {
  font-size: 0.81rem;
  color: var(--ink-secondary);
  line-height: 1.6;
}

.promo-notice {
  margin-top: 20px;
  padding: 18px 22px;
  border: 1px solid var(--line-hair);
  border-left: 3px solid var(--accent-bronze);
  background-color: var(--bg-surface);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
  font-size: 0.88rem;
}

/* --------------------------------------------------------------------------
   Section 07: FAQ Accordion
   -------------------------------------------------------------------------- */
.faq-layout {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: 36px;
}

.faq-intro {
  grid-column: span 4;
}

.faq-list {
  grid-column: span 8;
  border-top: 2px solid var(--line-strong);
}

.faq-item {
  border-bottom: 1px solid var(--line-hair);
}

.faq-trigger {
  width: 100%;
  padding: 22px 4px;
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 20px;
  text-align: left;
  font-size: 1rem;
  font-weight: 600;
}

.faq-trigger__icon {
  font-family: var(--font-mono);
  font-size: 1.1rem;
  color: var(--ink-muted);
  flex-shrink: 0;
}

.faq-panel {
  display: none;
  padding: 0 4px 24px 4px;
  font-size: 0.9rem;
  color: var(--ink-secondary);
  line-height: 1.75;
}

.faq-item.is-open .faq-panel {
  display: block;
}

/* --------------------------------------------------------------------------
   Section 08: Consultation Lead Form
   -------------------------------------------------------------------------- */
.consult-layout {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: 44px;
}

.consult-info {
  grid-column: span 5;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: 32px;
}

.direct-contact-box {
  border-top: 1px solid var(--line-mid);
  padding-top: 22px;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.direct-contact-box__phone {
  font-family: var(--font-mono);
  font-size: 1.65rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.consult-form-wrap {
  grid-column: span 7;
  background-color: var(--bg-surface);
  border-top: 2px solid var(--line-strong);
  border-left: 1px solid var(--line-hair);
  border-right: 1px solid var(--line-hair);
  border-bottom: 1px solid var(--line-hair);
  padding: clamp(24px, 4vw, 40px);
}

.form-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}

.form-field {
  display: flex;
  flex-direction: column;
  gap: 7px;
}

.form-field--full {
  grid-column: span 2;
}

.form-label {
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--ink-secondary);
}

.form-label span {
  color: var(--status-alert);
}

.form-control {
  width: 100%;
  padding: 12px 14px;
  font-size: 0.92rem;
  background-color: var(--bg-page);
  border: 1px solid var(--line-mid);
  border-radius: var(--radius-sharp);
  outline: none;
  transition: border-color 0.15s ease;
}

.form-control:focus {
  border-color: var(--ink-primary);
}

textarea.form-control {
  resize: vertical;
  min-height: 96px;
}

.consent-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding-top: 6px;
  font-size: 0.83rem;
  color: var(--ink-secondary);
  flex-wrap: wrap;
}

.consent-check {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  cursor: pointer;
}

.link-underline {
  text-decoration: underline;
  text-underline-offset: 3px;
  color: var(--ink-muted);
  font-size: 0.8rem;
}

.form-error {
  font-size: 0.82rem;
  color: var(--status-alert);
  min-height: 1.2em;
}

/* --------------------------------------------------------------------------
   Footer & Mobile Quick Action Bar
   -------------------------------------------------------------------------- */
.site-footer {
  border-top: 1px solid var(--line-hair);
  padding-top: 44px;
  padding-bottom: 84px;
  font-size: 0.82rem;
  color: var(--ink-muted);
}

.site-footer__inner {
  display: flex;
  justify-content: space-between;
  gap: 24px;
  flex-wrap: wrap;
}

.mobile-quick-bar {
  display: none;
  position: fixed;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 45;
  background-color: var(--bg-surface);
  border-top: 1px solid var(--line-mid);
  grid-template-columns: 1fr 1.4fr;
}

.mobile-quick-bar a {
  display: flex;
  align-items: center;
  justify-content: center;
  height: 54px;
  font-size: 0.88rem;
  font-weight: 700;
}

.mobile-quick-bar__call {
  border-right: 1px solid var(--line-hair);
  color: var(--ink-primary);
}

.mobile-quick-bar__consult {
  background-color: var(--accent-forest);
  color: #FFFFFF;
}

/* --------------------------------------------------------------------------
   Modal Dialog
   -------------------------------------------------------------------------- */
.modal-backdrop {
  display: none;
  position: fixed;
  inset: 0;
  z-index: 60;
  background-color: rgba(12, 14, 16, 0.65);
  align-items: center;
  justify-content: center;
  padding: 20px;
}

.modal-backdrop.is-open {
  display: flex;
}

.modal-box {
  width: 100%;
  max-width: 540px;
  background-color: var(--bg-surface);
  border-top: 3px solid var(--line-strong);
  padding: 32px;
  max-height: 88vh;
  overflow-y: auto;
}

.modal-box__head {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--line-hair);
  margin-bottom: 18px;
}

.modal-box__title {
  font-size: 1.15rem;
  font-weight: 700;
}

.modal-summary {
  background-color: var(--bg-page);
  border: 1px solid var(--line-hair);
  padding: 16px;
  font-size: 0.85rem;
  line-height: 1.75;
  margin: 16px 0 22px;
  white-space: pre-line;
}

/* --------------------------------------------------------------------------
   Responsive Breakpoints
   -------------------------------------------------------------------------- */
@media (max-width: 1024px) {
  .hero__headline-wrap,
  .hero__summary-wrap,
  .editorial-head__main,
  .editorial-head__side,
  .patent-dossier__head,
  .patent-dossier__body,
  .spec-sidebar,
  .spec-detail,
  .pnl-controls,
  .pnl-statement,
  .faq-intro,
  .faq-list,
  .consult-info,
  .consult-form-wrap {
    grid-column: span 12;
  }

  .spec-sidebar {
    position: static;
  }

  .patent-dossier__head {
    border-right: none;
    border-bottom: 1px solid var(--line-hair);
  }

  .flow-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .track-card {
    grid-column: span 6;
  }

  .track-photo-col {
    grid-column: span 12;
  }

  .process-row {
    grid-template-columns: repeat(3, 1fr);
  }
}

@media (max-width: 768px) {
  .gnb-nav,
  .header-actions .btn {
    display: none;
  }

  .mobile-menu-btn {
    display: inline-flex;
  }

  .fact-strip {
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
  }

  .patent-dossier__body,
  .spec-dl,
  .schematic-grid-3,
  .schematic-grid-4,
  .flow-grid,
  .process-row,
  .form-grid {
    grid-template-columns: 1fr;
  }

  .form-field--full {
    grid-column: span 1;
  }

  .track-card {
    grid-column: span 12;
  }

  .hero-visual__media {
    aspect-ratio: 16 / 10;
  }

  .mobile-quick-bar {
    display: grid;
  }
}