/* ============================================================
   Carmaviela — styles.css
   Design: Quiet Luxury / Japandi / Minimal
============================================================ */

/* ============================================================
   Design Tokens
============================================================ */
:root {
  /* Color */
  --bg-base:        #F6F3EE;
  --bg-warm:        #EDE9E3;
  --bg-section-alt: #F0EDE8;
  --text-primary:   #1C1A18;
  --text-secondary: #6B6159;
  --text-muted:     #9C9189;
  --accent:         #8A7A6E;
  --accent-light:   #C2B4A8;
  --border:         #D6CFC6;
  --border-light:   #E5E0D9;
  --white:          #FFFFFF;

  /* Typography */
  --font-serif: Georgia, 'Times New Roman', 'Hiragino Mincho ProN', 'Yu Mincho', serif;
  --font-sans:  'Hiragino Kaku Gothic ProN', 'Hiragino Sans', 'Yu Gothic', 'Noto Sans JP',
                -apple-system, BlinkMacSystemFont, system-ui, sans-serif;

  /* Sizing */
  --max-width:      1100px;
  --section-pad-v:  120px;
  --section-pad-h:  40px;
  --header-h:       72px;

  /* Motion */
  --ease:           cubic-bezier(0.25, 0.1, 0.25, 1);
  --duration:       0.4s;
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: var(--header-h);
}

body {
  font-family: var(--font-sans);
  background-color: var(--bg-base);
  color: var(--text-primary);
  font-size: 1.0625rem;
  line-height: 1.85;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

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

ul, ol {
  list-style: none;
}

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

/* ============================================================
   Typography — Base Scale
============================================================ */
h1, h2, h3, h4 {
  font-family: var(--font-serif);
  font-weight: normal;
  line-height: 1.35;
  letter-spacing: 0.02em;
  color: var(--text-primary);
}

h2 {
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  margin-bottom: 1.25rem;
}

h3 {
  font-size: clamp(1.1rem, 2.5vw, 1.375rem);
  margin-bottom: 0.75rem;
}

p {
  color: var(--text-secondary);
  margin-bottom: 1.25em;
}

p:last-child {
  margin-bottom: 0;
}

/* ============================================================
   Layout — Section Inner
============================================================ */
.section-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: var(--section-pad-v) var(--section-pad-h);
}

/* Section label — small uppercase tag above headings */
.section-label {
  display: block;
  font-size: 0.75rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 1rem;
  font-family: var(--font-serif);
}

/* Section lead — larger intro paragraph */
.section-lead {
  font-size: clamp(1rem, 2vw, 1.125rem);
  color: var(--text-secondary);
  max-width: 640px;
  line-height: 1.9;
  margin-top: 0.25rem;
  margin-bottom: 3.5rem;
}

/* ============================================================
   Buttons
============================================================ */
.btn-primary,
.btn-secondary {
  display: inline-block;
  font-family: var(--font-sans);
  font-size: 0.8125rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  border-radius: 2px;
  transition: background-color var(--duration) var(--ease),
              color var(--duration) var(--ease),
              border-color var(--duration) var(--ease);
  white-space: nowrap;
}

.btn-primary {
  padding: 0.875em 2.25em;
  background-color: var(--text-primary);
  color: var(--bg-base);
  border: 1px solid var(--text-primary);
}

.btn-primary:hover,
.btn-primary:focus-visible {
  background-color: transparent;
  color: var(--text-primary);
}

.btn-secondary {
  padding: 0.75em 1.75em;
  background-color: transparent;
  color: var(--text-primary);
  border: 1px solid var(--border);
}

.btn-secondary:hover,
.btn-secondary:focus-visible {
  border-color: var(--accent);
  color: var(--accent);
}

:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
}

/* ============================================================
   Header
============================================================ */
#site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  height: var(--header-h);
  background-color: rgba(246, 243, 238, 0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-light);
  transition: background-color var(--duration) var(--ease);
}

.header-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--section-pad-h);
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
}

.logo {
  font-family: var(--font-serif);
  font-size: 1.25rem;
  letter-spacing: 0.1em;
  color: var(--text-primary);
  flex-shrink: 0;
}

.nav-list {
  display: flex;
  align-items: center;
  gap: 2rem;
  flex-wrap: wrap;
}

.nav-list a {
  font-size: 0.75rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-secondary);
  transition: color var(--duration) var(--ease);
}

.nav-list a:hover {
  color: var(--text-primary);
}

.nav-cta {
  padding: 0.55em 1.25em;
  border: 1px solid var(--border);
  border-radius: 2px;
  color: var(--text-primary) !important;
  transition: background-color var(--duration) var(--ease),
              border-color var(--duration) var(--ease) !important;
}

.nav-cta:hover {
  background-color: var(--text-primary);
  color: var(--bg-base) !important;
  border-color: var(--text-primary) !important;
}

/* Hamburger (hidden on desktop) */
.menu-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
  width: 36px;
  height: 36px;
  flex-shrink: 0;
}

.menu-toggle span {
  display: block;
  width: 22px;
  height: 1px;
  background-color: var(--text-primary);
  transition: transform var(--duration) var(--ease), opacity var(--duration) var(--ease);
}

/* ============================================================
   Hero
============================================================ */
#hero {
  min-height: 100svh;
  display: flex;
  align-items: center;
  padding-top: var(--header-h);
  background-color: var(--bg-base);
  position: relative;
}

/* Subtle decorative line */
#hero::after {
  content: '';
  position: absolute;
  right: 0;
  top: 20%;
  bottom: 20%;
  width: 1px;
  background: linear-gradient(to bottom, transparent, var(--border) 30%, var(--border) 70%, transparent);
  opacity: 0.5;
}

.hero-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 80px var(--section-pad-h);
  width: 100%;
}

.hero-eyebrow {
  font-size: 0.75rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 2rem;
  font-family: var(--font-serif);
}

.hero-headline {
  font-family: var(--font-serif);
  font-size: clamp(3rem, 9vw, 7rem);
  font-weight: normal;
  letter-spacing: -0.01em;
  line-height: 1.1;
  color: var(--text-primary);
  margin-bottom: 1.75rem;
  max-width: 14ch;
}

.hero-tagline {
  font-family: var(--font-serif);
  font-size: clamp(1rem, 2.5vw, 1.375rem);
  color: var(--text-secondary);
  margin-bottom: 1.5rem;
  letter-spacing: 0.03em;
  line-height: 1.6;
}

.hero-body {
  font-size: 1rem;
  color: var(--text-muted);
  max-width: 520px;
  line-height: 1.95;
  margin-bottom: 2.5rem;
}

/* Hero focus — subtle Corporate Wellness lead */
.hero-focus {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-top: 2rem;
  padding-top: 2rem;
  border-top: 1px solid var(--border-light);
  max-width: 480px;
}

.hero-focus-label {
  font-size: 0.675rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--text-muted);
  font-family: var(--font-serif);
  white-space: nowrap;
  flex-shrink: 0;
}

.hero-focus-link {
  font-size: 0.875rem;
  color: var(--text-secondary);
  letter-spacing: 0.02em;
  transition: color var(--duration) var(--ease);
}

.hero-focus-link:hover {
  color: var(--text-primary);
}

/* ============================================================
   Concept
============================================================ */
#concept {
  background-color: var(--bg-section-alt);
  border-top: 1px solid var(--border-light);
  border-bottom: 1px solid var(--border-light);
}

.concept-body {
  max-width: 640px;
  margin-bottom: 4rem;
}

.concept-body p {
  font-size: 1rem;
  line-height: 2;
}

/* Concept pillars — 2x2 grid */
.concept-pillars {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 0;
  border-top: 1px solid var(--border);
  border-left: 1px solid var(--border);
  margin-top: 4rem;
}

.concept-pillars li {
  padding: 2.5rem 2rem;
  border-bottom: 1px solid var(--border);
  border-right: 1px solid var(--border);
}

.pillar-en {
  display: block;
  font-family: var(--font-serif);
  font-size: 1.375rem;
  color: var(--text-primary);
  letter-spacing: 0.03em;
  margin-bottom: 0.25rem;
}

.pillar-ja {
  display: block;
  font-size: 0.75rem;
  letter-spacing: 0.15em;
  color: var(--accent);
  margin-bottom: 1rem;
}

.concept-pillars li p {
  font-size: 0.875rem;
  line-height: 1.8;
}

/* ============================================================
   Services
============================================================ */
#services {
  background-color: var(--bg-base);
}

.service-list {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1px;
  background-color: var(--border);
  border: 1px solid var(--border);
}

.service-item {
  background-color: var(--bg-base);
  padding: 2.75rem 2.5rem;
  position: relative;
}

/* Primary service (Corporate Wellness) spans full width */
.service-item--primary {
  grid-column: 1 / -1;
  padding: 3.5rem 2.5rem;
  background-color: var(--bg-section-alt);
}

.service-badge {
  display: inline-block;
  font-size: 0.625rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  padding: 0.3em 0.8em;
  border: 1px solid var(--accent);
  color: var(--accent);
  margin-bottom: 1.25rem;
  font-family: var(--font-serif);
}

.service-badge--coming {
  border-color: var(--border);
  color: var(--text-muted);
}

.service-badge--future {
  border-color: var(--border-light);
  color: var(--text-muted);
  opacity: 0.7;
}

.service-en {
  font-family: var(--font-serif);
  font-size: 0.75rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 0.375rem;
}

.service-item h3.service-ja {
  font-size: clamp(1.125rem, 2.5vw, 1.375rem);
  margin-bottom: 1rem;
}

.service-item--primary h3.service-ja {
  font-size: clamp(1.25rem, 3vw, 1.625rem);
}

.service-desc {
  font-size: 0.9375rem;
  line-height: 1.9;
  color: var(--text-secondary);
  margin-bottom: 1.5rem;
  max-width: 560px;
}

/* Brand message panel — fills empty grid cell */
.service-item--message {
  background-color: var(--bg-warm);
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  gap: 0;
}

.service-message-en {
  font-family: var(--font-serif);
  font-size: clamp(1.25rem, 2.5vw, 1.75rem);
  color: var(--text-primary);
  letter-spacing: 0.02em;
  margin-bottom: 0.75rem;
}

.service-message-ja {
  font-size: 0.875rem;
  line-height: 1.85;
  color: var(--text-muted);
  margin-bottom: 0;
}

/* ============================================================
   Corporate Wellness
============================================================ */
#corporate-wellness {
  background-color: var(--bg-section-alt);
  border-top: 1px solid var(--border-light);
  border-bottom: 1px solid var(--border-light);
}

.cw-description {
  max-width: 680px;
  margin-bottom: 4rem;
  padding-bottom: 4rem;
  border-bottom: 1px solid var(--border);
}

.cw-description p {
  font-size: 1rem;
  line-height: 2;
}

.cw-features {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 0;
  border-top: 1px solid var(--border);
  border-left: 1px solid var(--border);
  margin-bottom: 4rem;
}

.cw-features li {
  padding: 2.25rem 2rem;
  border-bottom: 1px solid var(--border);
  border-right: 1px solid var(--border);
}

.cw-feature-title {
  font-family: var(--font-serif);
  font-size: 1rem;
  color: var(--text-primary);
  letter-spacing: 0.02em;
  margin-bottom: 0.625rem;
  line-height: 1.5;
}

.cw-features li p:not(.cw-feature-title) {
  font-size: 0.9375rem;
  line-height: 1.85;
}

/* 5th feature item spans full width to avoid orphaned half-row */
.cw-features li:last-child:nth-child(odd) {
  grid-column: 1 / -1;
}

.cw-cta {
  max-width: 540px;
  padding: 3rem;
  border: 1px solid var(--border);
  background-color: var(--bg-base);
}

.cw-cta p {
  font-size: 0.9375rem;
  line-height: 1.9;
  margin-bottom: 2rem;
}

/* ============================================================
   Flow
============================================================ */
#flow {
  background-color: var(--bg-base);
}

.flow-steps {
  counter-reset: none;
  display: flex;
  flex-direction: column;
  gap: 0;
  position: relative;
}

/* Vertical connecting line */
.flow-steps::before {
  content: '';
  position: absolute;
  left: 23px;
  top: 12px;
  bottom: 12px;
  width: 1px;
  background: linear-gradient(to bottom, var(--border) 0%, var(--border) 90%, transparent 100%);
}

.flow-step {
  display: flex;
  gap: 2.5rem;
  padding: 2.5rem 0;
  border-bottom: 1px solid var(--border-light);
  position: relative;
}

.flow-step:last-child {
  border-bottom: none;
}

.flow-number {
  font-family: var(--font-serif);
  font-size: 0.75rem;
  letter-spacing: 0.1em;
  color: var(--white);
  background-color: var(--accent);
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  position: relative;
  z-index: 1;
}

.flow-content {
  flex: 1;
  padding-top: 0.5rem;
}

.flow-content h3.flow-title {
  font-size: 1rem;
  letter-spacing: 0.03em;
  margin-bottom: 0.75rem;
  color: var(--text-primary);
}

.flow-content p {
  font-size: 0.9375rem;
  line-height: 1.9;
  max-width: 600px;
}

/* ============================================================
   Company
============================================================ */
#company {
  background-color: var(--bg-section-alt);
  border-top: 1px solid var(--border-light);
}

.company-table {
  max-width: 720px;
  border-top: 1px solid var(--border);
}

.company-row {
  display: grid;
  grid-template-columns: 200px 1fr;
  gap: 1rem;
  padding: 1.5rem 0;
  border-bottom: 1px solid var(--border-light);
  align-items: baseline;
}

.company-row dt {
  font-size: 0.8125rem;
  letter-spacing: 0.08em;
  color: var(--text-muted);
}

.company-row dd {
  font-size: 0.9375rem;
  color: var(--text-primary);
  line-height: 1.7;
}

/* ============================================================
   Contact
============================================================ */
#contact {
  background-color: var(--bg-base);
  border-top: 1px solid var(--border-light);
}

#contact-form {
  max-width: 760px;
}

.form-group {
  margin-bottom: 2.25rem;
  display: flex;
  flex-direction: column;
  gap: 0.625rem;
}

.form-group label {
  font-size: 0.875rem;
  letter-spacing: 0.04em;
  color: var(--text-secondary);
}

.required {
  color: var(--accent);
  margin-left: 0.25em;
  font-size: 0.875em;
}

.form-group input,
.form-group textarea {
  font-family: var(--font-sans);
  font-size: 1rem;
  color: var(--text-primary);
  background-color: var(--bg-base);
  border: 1px solid var(--border);
  border-radius: 2px;
  padding: 1em 1.125em;
  width: 100%;
  transition: border-color var(--duration) var(--ease);
  outline: none;
  line-height: 1.6;
}

.form-group input::placeholder,
.form-group textarea::placeholder {
  color: var(--text-muted);
}

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

.form-group input.error,
.form-group textarea.error {
  border-color: #A05050;
}

.form-group textarea {
  resize: vertical;
  min-height: 160px;
}

.form-error {
  font-size: 0.8125rem;
  color: #A05050;
  min-height: 1.25em;
}

/* Privacy checkbox row */
.form-group--privacy {
  margin-top: 0.5rem;
}

.checkbox-label {
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
  cursor: pointer;
}

.checkbox-label input[type="checkbox"] {
  width: 16px;
  height: 16px;
  min-width: 16px;
  border: 1px solid var(--border);
  border-radius: 2px;
  appearance: none;
  -webkit-appearance: none;
  background-color: var(--bg-base);
  cursor: pointer;
  margin-top: 3px;
  position: relative;
  transition: background-color var(--duration) var(--ease),
              border-color var(--duration) var(--ease);
}

.checkbox-label input[type="checkbox"]:checked {
  background-color: var(--accent);
  border-color: var(--accent);
}

.checkbox-label input[type="checkbox"]:checked::after {
  content: '';
  position: absolute;
  left: 3px;
  top: 1px;
  width: 8px;
  height: 5px;
  border-left: 1.5px solid var(--white);
  border-bottom: 1.5px solid var(--white);
  transform: rotate(-45deg);
}

.checkbox-label span {
  font-size: 0.875rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

.checkbox-label span a {
  color: var(--text-primary);
  text-decoration: underline;
  text-underline-offset: 2px;
}

.checkbox-label span a:hover {
  color: var(--accent);
}

.btn-submit {
  margin-top: 1rem;
  width: auto;
}

/* Field-level error text */
.field-error {
  font-size: 0.8125rem;
  color: #8C4A4A;
  margin-top: 0.375rem;
  margin-bottom: 0;
  min-height: 1.2em;
  letter-spacing: 0.01em;
}

/* Error state border for input / textarea */
.input-error {
  border-color: #B87A7A !important;
}

/* Form message — hidden by default, shown via modifier class */
.form-message {
  display: none;
  font-size: 0.9375rem;
  line-height: 1.8;
  padding: 1.25rem 1.5rem;
  margin-top: 1.75rem;
  border-radius: 2px;
}

.form-message.success {
  display: block;
  color: var(--text-secondary);
  background-color: var(--bg-section-alt);
  border: 1px solid var(--border);
}

.form-message.error {
  display: block;
  color: #7A4040;
  background-color: #F9F3F3;
  border: 1px solid #D4BABA;
}

/* ============================================================
   Footer
============================================================ */
#site-footer {
  background-color: var(--text-primary);
  color: var(--bg-section-alt);
  border-top: 1px solid var(--border);
}

.footer-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 72px var(--section-pad-h) 48px;
}

.footer-logo {
  font-family: var(--font-serif);
  font-size: 1.5rem;
  letter-spacing: 0.1em;
  color: var(--bg-base);
  margin-bottom: 0.375rem;
}

.footer-tagline {
  font-family: var(--font-serif);
  font-size: 0.8125rem;
  letter-spacing: 0.12em;
  color: var(--accent-light);
  margin-bottom: 3rem;
}

.footer-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 2rem;
  margin-bottom: 3.5rem;
}

.footer-nav a {
  font-size: 0.75rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: rgba(246, 243, 238, 0.5);
  transition: color var(--duration) var(--ease);
}

.footer-nav a:hover {
  color: var(--bg-base);
}

.footer-copy {
  font-size: 0.75rem;
  color: rgba(246, 243, 238, 0.3);
  letter-spacing: 0.04em;
  margin: 0;
}

/* ============================================================
   Scroll Reveal (JS adds .revealed class)
============================================================ */
.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.7s var(--ease), transform 0.7s var(--ease);
}

.reveal.revealed {
  opacity: 1;
  transform: translateY(0);
}

/* ============================================================
   Responsive — Tablet (max 900px)
============================================================ */
@media (max-width: 900px) {
  :root {
    --section-pad-v: 88px;
    --section-pad-h: 28px;
  }

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

  .service-list {
    grid-template-columns: 1fr;
  }

  .service-item--primary {
    grid-column: 1;
  }

  .cw-features {
    grid-template-columns: 1fr;
  }

  .company-row {
    grid-template-columns: 160px 1fr;
  }
}

/* ============================================================
   Responsive — Mobile (max 640px)
============================================================ */
@media (max-width: 640px) {
  :root {
    --section-pad-v: 64px;
    --section-pad-h: 20px;
    --header-h: 60px;
  }

  /* Header — show hamburger */
  .nav-list {
    display: none;
    position: fixed;
    top: var(--header-h);
    left: 0;
    right: 0;
    background-color: var(--bg-base);
    border-bottom: 1px solid var(--border);
    flex-direction: column;
    gap: 0;
    padding: 1rem 0;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.06);
  }

  .nav-list.is-open {
    display: flex;
  }

  .nav-list li {
    width: 100%;
  }

  .nav-list a {
    display: block;
    padding: 0.875rem var(--section-pad-h);
    font-size: 0.8rem;
  }

  .nav-cta {
    border: none !important;
    border-radius: 0;
    padding: 0.875rem var(--section-pad-h) !important;
  }

  .menu-toggle {
    display: flex;
  }

  /* Hamburger → X animation */
  .menu-toggle[aria-expanded="true"] span:nth-child(1) {
    transform: translateY(6px) rotate(45deg);
  }
  .menu-toggle[aria-expanded="true"] span:nth-child(2) {
    opacity: 0;
  }
  .menu-toggle[aria-expanded="true"] span:nth-child(3) {
    transform: translateY(-6px) rotate(-45deg);
  }

  /* Hero */
  .hero-headline {
    font-size: clamp(2.5rem, 14vw, 4rem);
  }

  /* Concept pillars — single column */
  .concept-pillars {
    grid-template-columns: 1fr;
  }

  /* Flow — tighten */
  .flow-steps::before {
    display: none;
  }

  .flow-step {
    flex-direction: column;
    gap: 1rem;
  }

  .flow-number {
    width: 40px;
    height: 40px;
    font-size: 0.7rem;
  }

  .flow-content {
    padding-top: 0;
  }

  /* Company */
  .company-row {
    grid-template-columns: 1fr;
    gap: 0.25rem;
  }

  .company-row dt {
    font-size: 0.75rem;
  }

  /* CW cta */
  .cw-cta {
    padding: 2rem 1.5rem;
    max-width: 100%;
  }

  /* CW features — single column on mobile */
  .cw-features {
    grid-template-columns: 1fr;
  }

  .cw-features li:last-child:nth-child(odd) {
    grid-column: 1;
  }

  /* Service items */
  .service-item {
    padding: 2.25rem 1.5rem;
  }

  .service-item--primary {
    padding: 2.5rem 1.5rem;
  }

  .service-item--message {
    min-height: 200px;
  }

  /* Hero focus */
  .hero-focus {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.5rem;
    max-width: 100%;
  }

  /* Contact form */
  #contact-form {
    max-width: 100%;
  }

  .form-group input,
  .form-group textarea {
    font-size: 0.9375rem;
  }
}