/* ========================================
  Portfolio Demo Landing v2
  Concept: editorial structure x abstract presentation
  ======================================== */

:root {
  /* Brand Color */
  --ink: #0d1a2e;          /* 深い藍 */
  --ink-2: #1a2a44;
  --ink-3: #2d4068;
  --steel: #4a5a7a;        /* 鋼鉄系グレー */
  --concrete: #f5f3ef;     /* コンクリートの白 */
  --concrete-2: #ebe7df;
  --paper: #faf8f3;        /* 紙の白 */
  --ash: #8a8378;          /* 灰 */
  --rust: #c8512c;         /* 鉄錆のアクセント */
  --line: #d8d2c4;

  /* Type */
  --serif: 'Shippori Mincho', serif;
  --sans: 'Inter', 'Hiragino Kaku Gothic ProN', sans-serif;
  --mono: 'Roboto Mono', monospace;

  /* Layout */
  --gutter-desktop: 80px;
  --gutter-mobile: 24px;
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-font-smoothing: antialiased; }

body {
  font-family: var(--sans);
  color: var(--ink);
  background: var(--paper);
  line-height: 1.75;
  font-feature-settings: "palt";
  overflow-x: hidden;
}

img, svg { display: block; max-width: 100%; }

/* ========================================
   TYPE SYSTEM
   ======================================== */

/* Mono labels — category / tag / key indicators */
.head-label,
.hero-tag,
.strength-tag,
.service-tag,
.area-tag,
.team-role,
.foot-key,
.detail-key,
.info-label,
.statement-label,
.photo-label,
.footer-col h5 {
  font-family: var(--mono);
}

/* Accent labels (rust) */
.head-label,
.service-tag,
.area-tag,
.team-role,
.info-label,
.footer-col h5 {
  color: var(--rust);
}

/* Muted labels (ash) */
.strength-tag,
.foot-key,
.detail-key,
.photo-label {
  color: var(--ash);
}

/* Serif titles */
.head-title,
.strength-title,
.service-title,
.area-title,
.team-name,
.contact-title {
  font-family: var(--serif);
  color: var(--ink);
}

/* Bold titles */
.head-title,
.service-title,
.area-title,
.contact-title {
  font-weight: 800;
}

/* Medium titles */
.strength-title,
.team-name {
  font-weight: 700;
}

/* Serif body text */
.head-desc,
.service-lead,
.contact-desc {
  font-family: var(--serif);
}

/* Body text on light backgrounds */
.head-desc,
.strength-text,
.service-lead,
.team-text {
  line-height: 2;
  color: var(--ink-3);
}

/* ===== HEADER ===== */
.header {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  background: rgba(250, 248, 243, 0.92);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--line);
}

.header-inner {
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 var(--gutter-desktop);
  height: 76px;
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 48px;
}

/* Logo */
.logo {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  color: inherit;
}

.logo-mark {
  display: flex;
  flex-direction: column;
  gap: 3px;
  width: 22px;
}

.logo-bar {
  display: block;
  height: 3px;
  background: var(--ink);
}

.logo-bar:nth-child(1) { width: 100%; }
.logo-bar:nth-child(2) { width: 70%; }
.logo-bar:nth-child(3) { width: 100%; background: var(--rust); }

.logo-text { display: flex; flex-direction: column; }

.logo-name {
  font-family: var(--serif);
  font-size: 22px;
  font-weight: 800;
  letter-spacing: 0.02em;
  line-height: 1;
}

.logo-sub {
  font-family: var(--mono);
  font-size: 9px;
  letter-spacing: 0.15em;
  color: var(--ash);
  margin-top: 4px;
}

/* Nav */
.nav {
  display: flex;
  justify-content: center;
  gap: 40px;
}

.nav a {
  display: flex;
  align-items: baseline;
  gap: 6px;
  text-decoration: none;
  color: var(--ink);
  font-size: 13px;
  font-weight: 500;
  transition: color 0.2s;
}

.nav-num {
  font-family: var(--mono);
  font-size: 10px;
  color: var(--ash);
  letter-spacing: 0.05em;
}

.nav-label { font-weight: 600; }

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

/* Header CTA */
.header-cta {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 20px;
  background: var(--ink);
  color: var(--paper);
  text-decoration: none;
  font-size: 13px;
  font-weight: 600;
  border-radius: 2px;
  transition: background 0.2s;
}

.header-cta:hover { background: var(--rust); }

/* Hamburger */
.hamburger {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
  flex-direction: column;
  gap: 5px;
}

.hamburger span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--ink);
  transition: all 0.3s;
}

/* SP Nav */
.sp-nav {
  display: none;
  position: fixed;
  top: 76px; left: 0; right: 0;
  background: var(--paper);
  border-top: 1px solid var(--line);
  z-index: 99;
  flex-direction: column;
}

.sp-nav.open { display: flex; }

.sp-nav-link {
  padding: 18px 24px;
  font-size: 14px;
  font-weight: 500;
  color: var(--ink);
  text-decoration: none;
  border-bottom: 1px solid var(--line);
}

.sp-nav-link.sp-cta {
  background: var(--ink);
  color: var(--paper);
  border: none;
}

/* ========================================
   HERO
   ======================================== */
.hero {
  position: relative;
  min-height: 100svh;
  height: 100svh;
  padding-top: 76px;
  background: var(--paper);
  overflow: hidden;
  isolation: isolate;
}

.hero-bg {
  position: absolute;
  inset: 0;
  pointer-events: none;
  z-index: 0;
}

.hero-pattern {
  position: absolute;
  inset: 0;
  background-image:
    repeating-linear-gradient(0deg, var(--line) 0 1px, transparent 1px 80px),
    repeating-linear-gradient(90deg, var(--line) 0 1px, transparent 1px 80px);
  opacity: 0.4;
  mask-image: radial-gradient(ellipse at top right, black 0%, transparent 70%);
}

.hero-overlay {
  position: absolute;
  top: 0; right: 0;
  width: 50%;
  height: 100%;
  background: linear-gradient(135deg, transparent 0%, var(--concrete) 100%);
}

/* Hero Meta Bar */
.hero-meta {
  position: relative;
  display: flex;
  justify-content: space-between;
  max-width: 1400px;
  margin: 0 auto;
  padding: 8px var(--gutter-desktop);
  border-bottom: 1px solid var(--line);
  font-family: var(--mono);
  z-index: 3;
}

.meta-item {
  display: flex;
  align-items: baseline;
  gap: 10px;
}

.meta-label {
  font-size: 12px;
  letter-spacing: 0.15em;
  color: var(--ash);
}

.meta-val {
  font-family: var(--sans);
  font-size: 14px;
  font-weight: 600;
  color: var(--ink);
}

/* Hero Main */
.hero-inner {
  position: relative;
  max-width: 1400px;
  margin: 0 auto;
  padding: 12px var(--gutter-desktop) 20px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
  align-items: center;
  z-index: 2;
}

.hero-tag {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: clamp(11px, 0.75vw, 13px);
  letter-spacing: 0.12em;
  color: var(--ink-3);
  margin-bottom: 10px;
  grid-column: 1 / -1;
  position: relative;
  z-index: 3;
}

.tag-dot {
  display: inline-block;
  width: 8px;
  height: 8px;
  background: var(--rust);
  border-radius: 50%;
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0%, 100% { transform: scale(1); opacity: 1; }
  50% { transform: scale(1.4); opacity: 0.6; }
}

.hero-h {
  grid-column: 1;
  font-family: var(--serif);
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: -0.01em;
  font-size: clamp(40px, 4.6vw, 70px);
  color: var(--ink);
  margin-bottom: 32px;
  position: relative;
  z-index: 3;
}

.h-line {
  display: block;
  opacity: 0;
  transform: translateY(40px);
  animation: revealUp 1.2s cubic-bezier(0.2, 0.8, 0.2, 1) forwards;
}

.h-line-1 { animation-delay: 0.2s; }
.h-line-2 {
  animation-delay: 0.5s;
  color: var(--rust);
  font-style: italic;
  padding-left: 1.5em;
  position: relative;
}

.h-line-2::before {
  content: '';
  position: absolute;
  left: 0;
  top: 50%;
  width: 1em;
  height: 2px;
  background: var(--rust);
}

@keyframes revealUp {
  to { opacity: 1; transform: translateY(0); }
}

.hero-lead {
  grid-column: 1;
  font-family: var(--serif);
  font-size: clamp(17px, 1.1vw, 20px);
  font-weight: 500;
  line-height: 2.2;
  color: var(--ink-3);
  margin-bottom: 48px;
  opacity: 0;
  animation: revealUp 1s 0.8s forwards;
  position: relative;
  z-index: 3;
}

.hero-action {
  grid-column: 1;
  display: flex;
  align-items: center;
  gap: 24px;
  opacity: 0;
  animation: revealUp 1s 1s forwards;
  position: relative;
  z-index: 3;
}

.cta-main {
  display: inline-flex;
  align-items: center;
  gap: 16px;
  padding: 20px 36px;
  background: var(--ink);
  color: var(--paper);
  text-decoration: none;
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 0.05em;
  border-radius: 2px;
  position: relative;
  overflow: hidden;
  transition: background 0.3s;
}

.cta-main::before {
  content: '';
  position: absolute;
  inset: 0;
  background: var(--rust);
  transform: translateX(-100%);
  transition: transform 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  z-index: 0;
}

.cta-main:hover::before { transform: translateX(0); }
.cta-main > * { position: relative; z-index: 1; }

.cta-arrow {
  display: inline-block;
  transition: transform 0.3s;
}

.cta-main:hover .cta-arrow { transform: translateX(4px); }

.cta-sub {
  font-size: 14px;
  color: var(--ink);
  text-decoration: none;
  font-weight: 600;
  border-bottom: 1px solid var(--ink);
  padding-bottom: 4px;
  transition: color 0.2s, border-color 0.2s;
}

.cta-sub:hover { color: var(--rust); border-color: var(--rust); }

/* Hero Photo & Slideshow */
.hero-photo {
  grid-column: 2;
  grid-row: 2 / 6;
  height: min(62vh, 640px);
  position: relative;
  opacity: 0;
  animation: revealUp 1.2s 0.6s forwards;
  z-index: 2;
}

.slideshow-container {
  position: relative;
  width: 100%;
  height: 100%;
  background: var(--concrete);
  border: 1px solid var(--line);
  overflow: hidden;
}

.slide {
  position: absolute;
  inset: 0;
  opacity: 0;
  transition: opacity 0.6s cubic-bezier(0.4, 0, 0.2, 1);
  display: none;
}

.slide img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.slide.active {
  opacity: 1;
  display: block;
}

.slide-caption {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  background: linear-gradient(180deg, transparent 0%, rgba(0,0,0,0.6) 100%);
  color: var(--paper);
  padding: 24px 16px 16px;
  display: flex;
  align-items: baseline;
  gap: 12px;
  font-family: var(--mono);
  font-size: 11px;
}

.caption-num {
  color: var(--rust);
  font-weight: 600;
  letter-spacing: 0.05em;
}

.caption-text {
  color: rgba(255, 255, 255, 0.9);
  font-family: var(--sans);
}

/* Slide Navigation */
.slide-dots {
  position: absolute;
  bottom: 16px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  gap: 8px;
  z-index: 10;
}

.dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.4);
  cursor: pointer;
  transition: background 0.3s, transform 0.2s;
}

.dot:hover {
  background: rgba(255, 255, 255, 0.7);
}

.dot.active {
  background: var(--rust);
  transform: scale(1.2);
}

.slide-prev,
.slide-next {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  color: var(--paper);
  font-size: 28px;
  font-weight: bold;
  padding: 12px 16px;
  cursor: pointer;
  user-select: none;
  z-index: 10;
  background: rgba(0, 0, 0, 0.3);
  border: none;
  transition: background 0.2s, color 0.2s;
  line-height: 1;
  border-radius: 2px;
}

.slide-prev:hover,
.slide-next:hover {
  background: rgba(0, 0, 0, 0.6);
  color: var(--rust);
}

.slide-prev {
  left: 8px;
}

.slide-next {
  right: 8px;
}

/* Hero Scroll */
.hero-scroll {
  position: absolute;
  bottom: 32px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.3em;
  color: var(--ash);
}

.scroll-line {
  width: 1px;
  height: 40px;
  background: var(--ash);
  position: relative;
  overflow: hidden;
}

.scroll-line::after {
  content: '';
  position: absolute;
  top: -100%;
  left: 0;
  width: 100%;
  height: 100%;
  background: var(--ink);
  animation: scrollLine 2s infinite;
}

@keyframes scrollLine {
  to { top: 100%; }
}

/* ========================================
   STATEMENT
   ======================================== */
.statement {
  padding: 120px var(--gutter-desktop);
  background: var(--ink);
  color: var(--paper);
  position: relative;
}

.statement::before {
  content: '"';
  position: absolute;
  top: 40px;
  left: 50%;
  transform: translateX(-50%);
  font-family: var(--serif);
  font-size: 200px;
  color: rgba(255,255,255,0.05);
  line-height: 1;
}

.statement-inner {
  max-width: 800px;
  margin: 0 auto;
  text-align: center;
  position: relative;
}

.statement-label {
  font-size: 11px;
  letter-spacing: 0.3em;
  color: rgba(255,255,255,0.4);
  margin-bottom: 40px;
}

.statement-text {
  font-family: var(--serif);
  font-size: clamp(18px, 2.5vw, 26px);
  line-height: 2.2;
  font-weight: 500;
  color: rgba(255,255,255,0.95);
}

.statement-text em {
  font-style: normal;
  color: var(--rust);
  font-weight: 700;
  border-bottom: 2px solid var(--rust);
  padding-bottom: 2px;
}

/* ========================================
   SECTION COMMON
   ======================================== */
.section {
  padding: 140px var(--gutter-desktop);
  max-width: 1400px;
  margin: 0 auto;
}

.section-head {
  margin-bottom: 80px;
  max-width: 720px;
}

.head-label {
  font-size: 11px;
  letter-spacing: 0.25em;
  margin-bottom: 24px;
  font-weight: 500;
}

.head-title {
  font-size: clamp(32px, 5vw, 56px);
  line-height: 1.25;
  letter-spacing: -0.01em;
  margin-bottom: 32px;
}

.head-title em {
  font-style: italic;
  color: var(--rust);
  font-weight: 800;
}

.head-desc {
  font-size: 16px;
}

/* ========================================
   STRENGTHS
   ======================================== */
.strengths {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}

.strength {
  background: var(--paper);
  padding: 48px 40px;
  position: relative;
  transition: background 0.3s;
}

.strength:hover { background: var(--concrete); }

.strength-head {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  margin-bottom: 32px;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--line);
}

.strength-num {
  font-family: var(--mono);
  font-size: 32px;
  font-weight: 600;
  color: var(--rust);
  line-height: 1;
}

.strength-tag {
  font-size: 10px;
  letter-spacing: 0.2em;
}

.strength-title {
  font-size: 22px;
  line-height: 1.5;
  margin-bottom: 16px;
}

.strength-text {
  font-size: 14px;
  margin-bottom: 32px;
}

.strength-foot {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding-top: 20px;
  border-top: 1px dashed var(--line);
  font-family: var(--mono);
}

.foot-key {
  font-size: 10px;
  letter-spacing: 0.15em;
  text-transform: uppercase;
}

.foot-val {
  font-family: var(--sans);
  font-size: 13px;
  font-weight: 600;
  color: var(--ink);
}

/* ========================================
   SERVICE
   ======================================== */
.section-service { background: var(--concrete); }

.services {
  display: flex;
  flex-direction: column;
  gap: 4px;
  margin-bottom: 80px;
}

.service {
  display: grid;
  grid-template-columns: 200px 1fr;
  gap: 60px;
  padding: 56px 40px;
  background: var(--paper);
  border: 1px solid var(--line);
  position: relative;
  transition: transform 0.3s, box-shadow 0.3s;
}

.service:hover {
  transform: translateX(8px);
  box-shadow: -12px 12px 0 var(--ink);
}

.service-num {
  display: flex;
  align-items: flex-start;
}

.service-num span {
  font-family: var(--serif);
  font-size: 100px;
  font-weight: 800;
  line-height: 0.85;
  color: var(--ink);
  letter-spacing: -0.04em;
}

.service-tag {
  display: inline-block;
  font-size: 10px;
  letter-spacing: 0.2em;
  margin-bottom: 12px;
}

.service-title {
  font-size: 32px;
  margin-bottom: 24px;
}

.service-lead {
  font-size: 15px;
  margin-bottom: 32px;
  padding-bottom: 24px;
  border-bottom: 1px solid var(--line);
}

.service-detail {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.detail-row {
  display: grid;
  grid-template-columns: 100px 1fr;
  gap: 24px;
  align-items: baseline;
  font-size: 13px;
}

.detail-key {
  font-size: 10px;
  letter-spacing: 0.15em;
  text-transform: uppercase;
}

.detail-val {
  color: var(--ink-3);
  line-height: 1.8;
}

/* Area */
.area {
  background: var(--ink);
  color: var(--paper);
  padding: 56px 48px;
  display: grid;
  grid-template-columns: 280px 1fr;
  gap: 64px;
  align-items: start;
}

.area-tag {
  font-size: 11px;
  letter-spacing: 0.25em;
  margin-bottom: 12px;
}

.area-title {
  font-size: 32px;
  color: var(--paper);
}

.area-text {
  font-size: 15px;
  line-height: 2;
  color: rgba(255,255,255,0.85);
  margin-bottom: 32px;
}

.area-text strong {
  color: var(--rust);
  font-weight: 700;
  border-bottom: 2px solid var(--rust);
  padding-bottom: 1px;
}

.area-list {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.area-list li {
  padding: 6px 14px;
  background: rgba(255,255,255,0.08);
  border: 1px solid rgba(255,255,255,0.15);
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.05em;
  color: rgba(255,255,255,0.9);
}

/* ========================================
   TEAM
   ======================================== */
.team {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
}

.team-card {
  display: flex;
  flex-direction: column;
}

.team-photo {
  margin-bottom: 24px;
}

.team-photo .photo-placeholder {
  aspect-ratio: 3 / 4;
}

.team-info { padding: 0 4px; }

.team-role {
  font-size: 10px;
  letter-spacing: 0.25em;
  margin-bottom: 8px;
}

.team-name {
  font-size: 22px;
  margin-bottom: 12px;
}

.team-text {
  font-size: 13px;
}

/* ========================================
   COMPANY TABLE
   ======================================== */
.section-company { background: var(--concrete); }

.company-table {
  background: var(--paper);
  border: 1px solid var(--line);
  max-width: 900px;
}

.company-row {
  display: grid;
  grid-template-columns: 240px 1fr;
  border-bottom: 1px solid var(--line);
}

.company-row:last-child { border-bottom: none; }

.company-th {
  padding: 24px 32px;
  background: transparent;
  display: flex;
  align-items: center;
  gap: 20px;
  font-size: 14px;
  font-weight: 600;
  color: var(--ink);
  border-right: 1px solid var(--line);
}

.th-num {
  font-family: var(--mono);
  font-size: 11px;
  font-weight: 500;
  color: var(--rust);
  letter-spacing: 0.1em;
}

.company-td {
  padding: 24px 32px;
  font-size: 14px;
  color: var(--ink-3);
  display: flex;
  align-items: center;
}

.td-sub {
  font-size: 12px;
  color: var(--ash);
  margin-left: 8px;
}

/* ========================================
   CONTACT
   ======================================== */
.section-contact {
  background: var(--ink);
  color: var(--paper);
  max-width: none;
  padding: 140px var(--gutter-desktop);
  position: relative;
  overflow: hidden;
}

.contact-pattern {
  position: absolute;
  inset: 0;
  background-image:
    repeating-linear-gradient(0deg, rgba(255,255,255,0.03) 0 1px, transparent 1px 60px),
    repeating-linear-gradient(90deg, rgba(255,255,255,0.03) 0 1px, transparent 1px 60px);
  pointer-events: none;
}

.contact-inner {
  position: relative;
  max-width: 1400px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: start;
}

.contact-head .head-label {
  color: var(--rust);
}

.contact-title {
  font-size: clamp(32px, 5vw, 52px);
  line-height: 1.3;
  letter-spacing: -0.01em;
  color: var(--paper);
  margin-bottom: 32px;
}

.contact-title em {
  font-style: italic;
  color: var(--rust);
}

.contact-desc {
  font-size: 15px;
  line-height: 2;
  color: rgba(255,255,255,0.7);
  margin-bottom: 56px;
}

.contact-info {
  display: flex;
  flex-direction: column;
  gap: 24px;
  padding-top: 32px;
  border-top: 1px solid rgba(255,255,255,0.15);
}

.info-block {
  display: grid;
  grid-template-columns: 100px 1fr;
  gap: 24px;
  align-items: baseline;
}

.info-label {
  font-size: 11px;
  letter-spacing: 0.2em;
}

.info-text {
  font-size: 13px;
  color: rgba(255,255,255,0.85);
}

/* Form */
.contact-form {
  background: var(--paper);
  padding: 48px 40px;
  color: var(--ink);
}

.form-group {
  margin-bottom: 28px;
}

.form-group label {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 10px;
}

.label-text {
  font-size: 13px;
  font-weight: 600;
}

.required, .optional {
  font-family: var(--mono);
  font-size: 9px;
  padding: 3px 8px;
  letter-spacing: 0.1em;
}

.required { background: var(--rust); color: var(--paper); }
.optional { background: var(--concrete-2); color: var(--ash); }

.form-group input,
.form-group textarea {
  width: 100%;
  padding: 14px 16px;
  border: 1px solid var(--line);
  background: var(--paper);
  font-size: 14px;
  font-family: var(--sans);
  color: var(--ink);
  outline: none;
  transition: border-color 0.2s;
  border-radius: 0;
}

.form-group input:focus,
.form-group textarea:focus {
  border-color: var(--ink);
}

.form-group textarea { resize: vertical; line-height: 1.8; }

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}

.form-row .form-group { margin-bottom: 0; }

.form-row + .form-group { margin-top: 28px; }

.btn-submit {
  display: inline-flex;
  align-items: center;
  gap: 16px;
  padding: 18px 36px;
  background: var(--ink);
  color: var(--paper);
  border: none;
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.1em;
  cursor: pointer;
  margin-top: 16px;
  transition: background 0.3s, gap 0.3s;
  font-family: var(--sans);
}

.btn-submit:hover {
  background: var(--rust);
  gap: 20px;
}

.btn-arrow { display: inline-block; }

/* ========================================
   FOOTER
   ======================================== */
.footer {
  background: var(--paper);
  border-top: 1px solid var(--line);
  padding: 80px var(--gutter-desktop) 40px;
}

.footer-inner {
  max-width: 1400px;
  margin: 0 auto;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 60px;
  padding-bottom: 60px;
  border-bottom: 1px solid var(--line);
}

.footer-tagline {
  margin-top: 20px;
  font-family: var(--serif);
  font-size: 14px;
  line-height: 2;
  color: var(--ink-3);
}

.footer-col h5 {
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.2em;
  margin-bottom: 20px;
}

.footer-col ul {
  list-style: none;
}

.footer-col li {
  font-size: 13px;
  color: var(--ink-3);
  margin-bottom: 12px;
}

.footer-col li a {
  color: inherit;
  text-decoration: none;
  transition: color 0.2s;
}

.footer-col li a:hover { color: var(--rust); }

.footer-bottom {
  display: flex;
  justify-content: space-between;
  padding-top: 32px;
  font-family: var(--mono);
  font-size: 11px;
  color: var(--ash);
  letter-spacing: 0.05em;
}

/* ========================================
   ANIMATIONS
   ======================================== */
.fade-in {
  opacity: 0;
  transform: translateY(40px);
  transition: opacity 0.8s ease-out, transform 0.8s ease-out;
}

.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

@media (max-width: 1200px) {
  .hero {
    min-height: 100svh;
    height: auto;
    background: var(--paper);
  }

  .hero::before {
    content: none;
  }

  .hero-bg {
    z-index: 0;
    background: transparent;
  }

  .hero-pattern {
    opacity: 0.3;
  }

  .hero-overlay {
    width: 42%;
    background: linear-gradient(135deg, transparent 0%, var(--concrete) 100%);
  }

  .hero-meta,
  .hero-inner,
  .hero-scroll {
    z-index: 2;
  }

  .hero-meta {
    padding: 10px 28px;
    border-bottom-color: var(--line);
    flex-wrap: wrap;
    gap: 10px;
  }

  .meta-label {
    color: var(--ash);
  }

  .meta-val {
    color: var(--ink);
  }

  .hero-inner {
    max-width: 980px;
    grid-template-columns: 1fr;
    gap: 20px;
    padding: 22px 28px 28px;
  }

  .hero-tag {
    font-size: clamp(11px, 1.4vw, 13px);
    color: var(--ink-3);
    margin-bottom: 0;
  }

  .hero-h {
    font-size: clamp(34px, 6vw, 50px);
    color: var(--ink);
    margin-bottom: 10px;
  }

  .h-line-1 {
    font-size: clamp(2rem, 6.2vw, 3.6rem);
  }

  .h-line-2 {
    color: var(--rust);
    font-size: clamp(2rem, 6.2vw, 3.6rem);
  }

  .h-line-2::before {
    background: var(--rust);
  }

  .hero-lead {
    font-size: clamp(15px, 1.9vw, 18px);
    color: var(--ink-3);
    line-height: 1.8;
    margin-bottom: 16px;
  }

  .cta-main {
    font-size: 14px;
    padding: 16px 28px;
    background: var(--ink);
    border: none;
  }

  .cta-sub {
    font-size: 13px;
    color: var(--ink);
    border-bottom-color: var(--ink);
  }

  .hero-photo {
    display: block;
    grid-column: 1;
    grid-row: auto;
    width: 100%;
    max-width: 760px;
    height: clamp(340px, 48vh, 560px);
    justify-self: start;
    margin-top: 8px;
  }

  .hero-scroll {
    display: none;
  }
}

/* ========================================
   RESPONSIVE
   ======================================== */
@media (max-width: 1024px) {
  .header-inner { grid-template-columns: auto auto; padding: 0 var(--gutter-mobile); }
  .nav, .header-cta { display: none; }
  .hamburger { display: flex; justify-self: end; }

  .hero-inner {
    gap: 16px;
    padding: 18px 24px 22px;
  }

  .hero-action {
    flex-direction: row;
    flex-wrap: wrap;
    gap: 14px;
  }

  .hero-tag {
    font-size: 12px;
  }

  .hero-h {
    font-size: clamp(30px, 5.8vw, 42px);
    margin-bottom: 8px;
  }

  .h-line-1,
  .h-line-2 {
    font-size: clamp(30px, 5.8vw, 42px);
  }

  .hero-lead {
    font-size: 15px;
    line-height: 1.7;
    margin-bottom: 10px;
  }

  .cta-main {
    font-size: 14px;
    padding: 14px 24px;
  }

  .cta-sub {
    font-size: 13px;
  }

  .hero-photo {
    max-width: 100%;
    height: clamp(320px, 44vh, 480px);
  }

  .slide-prev,
  .slide-next {
    font-size: 22px;
    padding: 10px 12px;
  }

  .slide-caption {
    padding: 18px 14px 12px;
    font-size: 10px;
  }

  .hero-meta { padding: 16px 24px; flex-wrap: wrap; gap: 16px; }

  .head-label { font-size:16px;}

  .head-desc {font-size: 18px;}

  .section { padding: 100px var(--gutter-mobile); }

  .strengths { grid-template-columns: 1fr;}

  .strength-title {font-size: 32px;}

  .foot-key {font-size: 14px;}

  .foot-val {font-size: 16px;}

  .strength-text {font-size: 18px;}

  .strength-tag {font-size: 14px;}

  .service {
    grid-template-columns: 1fr;
    gap: 24px;
    padding: 40px 24px;
  }

  .service-title {font-size: 32px;}

  .service-tag {font-size: 16px;}

  .service-lead{font-size: 18px;}

  .detail-key {font-size: 14px;}

  .detail-val {font-size: 16px;}

  .service-num span { font-size: 64px; }

  .service:hover { transform: none; box-shadow: none; }

  .team { grid-template-columns: 1fr; gap: 40px; }

  .area {
    grid-template-columns: 1fr;
    gap: 32px;
    padding: 40px 28px;
      }

  .area-tag {font-size: 14px;}

  .area-title {font-size: 30px;}

  .area-text {font-size: 17px;}

  .area-list li {font-size: 14px;}

  .team-role {font-size: 14px;}

  .team-name {font-size: 26px;}

  .team-text {font-size: 17px;}

  .company-row { grid-template-columns: 140px 1fr; }
  .company-th { padding: 20px; gap: 12px; }
  .company-th, .company-td { font-size: 16px; }
  .company-td { padding: 20px; }

  .th-num {font-size: 12px;}


  .section-contact { padding: 100px var(--gutter-mobile); }

  .contact-inner {
    grid-template-columns: 1fr;
    gap: 48px;
  }

  .contact-form { padding: 36px 28px; }

  .form-row { grid-template-columns: 1fr; gap: 28px; }

  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 40px;
  }

  .footer-bottom { flex-direction: column; gap: 8px; }
}

@media (max-width: 767px) {
  .hero {
    min-height: 100svh;
    height: auto;
    background: none;
  }

  .hero::before {
    content: '';
    position: absolute;
    inset: 0;
    z-index: 0;
    background: url('img/slide-02-machining.jpeg') center center / cover no-repeat;
  }

  .hero-bg {
    z-index: 1;
    background: rgba(8, 18, 33, 0.44);
  }

  .hero-pattern {
    opacity: 0.18;
    mask-image: none;
  }

  .hero-overlay {
    width: 100%;
    background: linear-gradient(180deg, rgba(13, 26, 46, 0.16) 0%, rgba(13, 26, 46, 0.72) 100%);
  }

  .hero-meta,
  .hero-inner {
    z-index: 2;
  }

  .hero-meta {
    padding: 10px 16px;
    border-bottom-color: rgba(255, 255, 255, 0.2);
  }

  .meta-label {
    color: rgba(250, 248, 243, 0.72);
  }

  .meta-val {
    color: var(--paper);
  }

  .hero-inner {
    padding: 16px 16px 26px;
    gap: 14px;
  }

  .hero-tag {
    color: rgba(250, 248, 243, 0.86);
    font-size: 10px;
    letter-spacing: 0.09em;
  }

  .hero-h {
    color: var(--paper);
    margin-bottom: 6px;
  }

  .h-line-1,
  .h-line-2 {
    font-size: clamp(28px, 8vw, 38px);
  }

  .h-line-2 {
    color: #ff8a63;
  }

  .h-line-2::before {
    background: #ff8a63;
  }

  .hero-lead {
    color: rgba(250, 248, 243, 0.92);
    font-size: 14px;
    line-height: 1.72;
    margin-bottom: 8px;
  }

  .hero-action {
    gap: 10px;
  }

  .cta-main {
    background: rgba(13, 26, 46, 0.92);
    border: 1px solid rgba(255, 255, 255, 0.25);
    font-size: 13px;
    padding: 12px 18px;
  }

  .cta-sub {
    color: var(--paper);
    border-bottom-color: rgba(250, 248, 243, 0.7);
    font-size: 12px;
  }

  .hero-photo {
    display: none;
  }

  .hero-scroll {
    display: none;
  }
}

@media (max-width: 600px) {
  .hero-meta .meta-item:nth-child(3) { display: none; }

  .hero-meta {
    gap: 8px;
  }

  .meta-item {
    gap: 6px;
  }

  .meta-label {
    font-size: 10px;
  }

  .meta-val {
    font-size: 12px;
  }

  .hero-h {
    line-height: 1.18;
  }

  .h-line-2 {
    padding-left: 1.1em;
  }

  .cta-main {
    width: 100%;
    justify-content: center;
  }

  .head-title { font-size: 30px; }

  .strength { padding: 36px 24px; }

  .footer-grid { grid-template-columns: 1fr; }

  .statement { padding: 80px 24px; }

  .statement-text { line-height: 2; }
}