/* ========================================================================
   ITADAKI Landing Page · styles.css
   Brand: black, white, deep navy, restrained gold
   Type: Cormorant Garamond (display) / Noto Serif JP (Japanese)
   ======================================================================== */

:root {
  --color-black: #0A0A0A;
  --color-white: #FFFFFF;
  --color-ink: #1A1A1A;
  --color-ink-soft: #2A2A2A;
  --color-navy: #1F3864;
  --color-navy-deep: #0F1F38;
  --color-gold: #AB8B3D;
  --color-gold-soft: #C9A75E;
  --color-paper: #FAF8F3;
  --color-paper-warm: #F2EFE6;
  --color-text: #1A1A1A;
  --color-text-muted: #6B6B6B;
  --color-text-light: rgba(255, 255, 255, 0.78);
  --color-border: rgba(0, 0, 0, 0.08);
  --color-border-dark: rgba(255, 255, 255, 0.14);

  --font-serif: 'Cormorant Garamond', 'Times New Roman', serif;
  --font-jp: 'Noto Serif JP', 'Hiragino Mincho ProN', 'Yu Mincho', serif;

  --max-width: 1240px;
  --max-width-narrow: 760px;
  --section-pad-y: clamp(80px, 12vw, 160px);
  --section-pad-y-sm: clamp(60px, 8vw, 100px);
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-serif);
  color: var(--color-text);
  background: var(--color-paper);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

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

/* ========================================================================
   Hero
   ======================================================================== */
.hero {
  min-height: 100vh;
  background-color: var(--color-black);
  background-size: cover;
  background-position: center center;
  background-repeat: no-repeat;
  color: var(--color-white);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 40px 24px;
  position: relative;
}

.hero-frame {
  border: 1px solid var(--color-gold);
  padding: clamp(48px, 8vw, 96px) clamp(32px, 6vw, 80px);
  text-align: center;
  max-width: 880px;
  width: 100%;
}

.hero-mark {
  font-family: var(--font-jp);
  font-size: clamp(72px, 12vw, 120px);
  font-weight: 400;
  margin-bottom: 24px;
}

.hero-divider {
  width: 64px;
  height: 1px;
  background: var(--color-gold);
  margin: 0 auto 48px;
}

.hero-title {
  font-family: var(--font-serif);
  font-style: italic;
  font-weight: 300;
  font-size: clamp(28px, 4.2vw, 56px);
  line-height: 1.25;
  margin-bottom: 24px;
  letter-spacing: 0.005em;
}

.hero-subtitle {
  font-family: var(--font-serif);
  font-weight: 300;
  font-size: clamp(13px, 1.3vw, 16px);
  letter-spacing: 0.32em;
  text-transform: uppercase;
  margin-bottom: 56px;
  color: var(--color-text-light);
}

.hero-cta {
  display: inline-block;
  font-family: var(--font-serif);
  font-size: 14px;
  letter-spacing: 0.32em;
  text-transform: uppercase;
  padding: 18px 44px;
  border: 1px solid var(--color-white);
  color: var(--color-white);
  transition: background 0.4s, color 0.4s;
}

.hero-cta:hover,
.hero-cta:focus {
  background: var(--color-white);
  color: var(--color-black);
}

.hero-scroll-hint {
  position: absolute;
  bottom: 32px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  font-size: 10px;
  letter-spacing: 0.4em;
  color: var(--color-text-light);
}

.hero-scroll-line {
  width: 1px;
  height: 36px;
  background: linear-gradient(to bottom, var(--color-gold), transparent);
}

/* ========================================================================
   Sections
   ======================================================================== */
.section {
  padding: var(--section-pad-y) 24px;
  background: var(--color-paper);
}

.section-quiet {
  background: var(--color-paper-warm);
}

.section-dark {
  background-color: var(--color-navy-deep);
  background-size: cover;
  background-position: center center;
  background-repeat: no-repeat;
  color: var(--color-white);
}

.section-form {
  background: var(--color-paper);
  padding-top: var(--section-pad-y);
  padding-bottom: var(--section-pad-y);
}

.container {
  max-width: var(--max-width);
  margin: 0 auto;
}

.container-narrow {
  max-width: var(--max-width-narrow);
}

.eyebrow {
  font-size: 12px;
  letter-spacing: 0.4em;
  text-transform: uppercase;
  color: var(--color-text-muted);
  margin-bottom: 32px;
  text-align: center;
}

.eyebrow-dark {
  color: rgba(255, 255, 255, 0.55);
}

.display-title {
  font-family: var(--font-serif);
  font-weight: 300;
  font-size: clamp(32px, 4.6vw, 58px);
  line-height: 1.25;
  text-align: center;
  margin-bottom: 64px;
  letter-spacing: -0.01em;
}

.display-title em {
  font-style: italic;
  color: var(--color-gold);
}

.display-title-dark {
  color: var(--color-white);
}

.prose {
  max-width: 640px;
  margin: 0 auto;
  text-align: center;
  font-size: clamp(17px, 1.6vw, 21px);
  line-height: 1.85;
  font-weight: 400;
}

.prose p {
  margin-bottom: 24px;
}

.prose .emphasis {
  margin-top: 56px;
  font-style: italic;
  font-size: clamp(20px, 2.2vw, 28px);
  color: var(--color-navy);
}

.prose-dark {
  color: var(--color-text-light);
  font-size: clamp(16px, 1.5vw, 19px);
  line-height: 1.9;
  margin-bottom: 20px;
}

.manifesto-line {
  font-family: var(--font-serif);
  font-style: italic;
  font-weight: 300;
  font-size: clamp(17px, 1.7vw, 22px);
  text-align: center;
  line-height: 1.9;
  color: var(--color-text-light);
  max-width: 640px;
  margin: 56px auto 0;
}

/* ========================================================================
   Four Elements
   ======================================================================== */
.four-elements {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 48px;
}

.element {
  text-align: center;
  padding: 8px;
}

.element-num {
  font-family: var(--font-serif);
  font-size: 14px;
  letter-spacing: 0.3em;
  color: var(--color-gold);
  margin-bottom: 20px;
}

.element-title {
  font-family: var(--font-serif);
  font-weight: 400;
  font-size: clamp(20px, 2vw, 26px);
  margin-bottom: 16px;
  letter-spacing: 0.01em;
  line-height: 1.3;
}

.element-desc {
  font-size: 15px;
  line-height: 1.7;
  color: var(--color-text);
}

/* ========================================================================
   Two-Column
   ======================================================================== */
.two-col {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: start;
}

.two-col-dark {
  align-items: start;
}

.two-col-left .display-title {
  text-align: left;
  margin-bottom: 0;
}

.two-col-left {
  text-align: left;
}

.two-col-right {
  font-size: clamp(15px, 1.4vw, 18px);
  line-height: 1.85;
}

.two-col-right p {
  margin-bottom: 20px;
}

/* ========================================================================
   Logistics List
   ======================================================================== */
.logistics-list {
  list-style: none;
}

.logistics-list li {
  display: grid;
  grid-template-columns: 120px 1fr;
  gap: 24px;
  align-items: baseline;
  padding: 18px 0;
  border-bottom: 1px solid var(--color-border-dark);
}

.logistics-list li:last-child {
  border-bottom: none;
}

.logistics-num {
  font-family: var(--font-serif);
  font-style: italic;
  font-size: 15px;
  color: var(--color-gold-soft);
  letter-spacing: 0.05em;
}

.logistics-text {
  font-size: 15px;
  color: var(--color-text-light);
}

/* ========================================================================
   Experience Timeline
   ======================================================================== */
.experience-timeline {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 32px;
  margin-top: 48px;
}

.exp-step {
  text-align: center;
  padding: 32px 16px;
  border-top: 1px solid var(--color-gold);
  position: relative;
}

.exp-step::before {
  content: "";
  position: absolute;
  top: -5px;
  left: 50%;
  transform: translateX(-50%);
  width: 9px;
  height: 9px;
  background: var(--color-gold);
  border-radius: 50%;
}

.exp-time {
  display: block;
  font-family: var(--font-serif);
  font-style: italic;
  font-size: 15px;
  color: var(--color-gold);
  margin-bottom: 16px;
  letter-spacing: 0.05em;
}

.exp-step p {
  font-size: 14px;
  line-height: 1.7;
  color: var(--color-text);
}

/* ========================================================================
   Plans
   ======================================================================== */
.plans {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.plan {
  background: var(--color-white);
  border: 1px solid var(--color-border);
  padding: 40px 28px;
  text-align: center;
  position: relative;
  transition: transform 0.3s, box-shadow 0.3s;
}

.plan:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 32px rgba(0, 0, 0, 0.06);
}

.plan-featured {
  border-color: var(--color-gold);
  border-width: 1.5px;
}

.plan-badge {
  position: absolute;
  top: -12px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--color-gold);
  color: var(--color-white);
  padding: 5px 18px;
  font-size: 10px;
  letter-spacing: 0.32em;
  white-space: nowrap;
}

.plan-name {
  font-family: var(--font-serif);
  font-weight: 400;
  font-size: 26px;
  margin-bottom: 16px;
  letter-spacing: 0.02em;
}

.plan-price {
  font-family: var(--font-serif);
  font-style: italic;
  font-size: 20px;
  color: var(--color-navy);
  margin-bottom: 28px;
}

.plan-price span {
  font-style: normal;
  font-size: 13px;
  color: var(--color-text-muted);
}

.plan-features {
  list-style: none;
  text-align: left;
}

.plan-features li {
  font-size: 14px;
  line-height: 1.6;
  padding: 10px 0;
  border-bottom: 1px solid var(--color-border);
}

.plan-features li:last-child {
  border-bottom: none;
}

/* ========================================================================
   Cities
   ======================================================================== */
.cities-timeline {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 24px;
  position: relative;
  margin-top: 64px;
}

.cities-timeline::before {
  content: "";
  position: absolute;
  top: 28px;
  left: 10%;
  right: 10%;
  height: 1px;
  background: var(--color-border-dark);
}

.city-step {
  text-align: center;
  position: relative;
  padding-top: 56px;
}

.city-step::before {
  content: "";
  position: absolute;
  top: 24px;
  left: 50%;
  transform: translateX(-50%);
  width: 10px;
  height: 10px;
  background: var(--color-navy-deep);
  border: 1px solid var(--color-gold-soft);
  border-radius: 50%;
}

.city-active::before {
  background: var(--color-gold);
}

.city-year {
  display: block;
  font-family: var(--font-serif);
  font-style: italic;
  font-size: 13px;
  color: var(--color-gold-soft);
  margin-bottom: 8px;
  letter-spacing: 0.05em;
}

.city-name {
  font-family: var(--font-serif);
  font-weight: 400;
  font-size: 20px;
  color: var(--color-white);
  letter-spacing: 0.03em;
}

/* ========================================================================
   Form
   ======================================================================== */
.form-intro {
  text-align: center;
  font-size: 17px;
  line-height: 1.85;
  color: var(--color-text-muted);
  margin-bottom: 56px;
  font-family: var(--font-serif);
  font-weight: 300;
}

.preregister-form {
  max-width: 600px;
  margin: 0 auto;
}

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

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

.form-fieldset {
  border: none;
  margin: 48px 0;
  padding-top: 32px;
  border-top: 1px solid var(--color-border);
}

.form-fieldset legend {
  font-family: var(--font-serif);
  font-style: italic;
  font-size: 18px;
  color: var(--color-navy);
  margin-bottom: 24px;
  padding: 0 12px 0 0;
}

label {
  display: block;
  font-family: var(--font-serif);
  font-size: 14px;
  letter-spacing: 0.04em;
  margin-bottom: 10px;
  color: var(--color-text);
}

.required {
  color: var(--color-gold);
}

input[type="text"],
input[type="email"],
select {
  width: 100%;
  font-family: var(--font-serif);
  font-size: 16px;
  padding: 12px 14px;
  border: 1px solid var(--color-border);
  background: var(--color-white);
  color: var(--color-text);
  transition: border-color 0.2s, background 0.2s;
}

input:focus,
select:focus {
  outline: none;
  border-color: var(--color-gold);
}

select {
  appearance: none;
  background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='10' height='6' viewBox='0 0 10 6'><path fill='%23AB8B3D' d='M0 0l5 6 5-6z'/></svg>");
  background-repeat: no-repeat;
  background-position: right 16px center;
  padding-right: 36px;
}

.field-hint {
  font-size: 13px;
  color: var(--color-text-muted);
  margin-top: 8px;
  line-height: 1.5;
}

.form-field-consent {
  margin-top: 32px;
}

.checkbox-label {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  font-size: 14px;
  line-height: 1.6;
  cursor: pointer;
}

.checkbox-label input[type="checkbox"] {
  margin-top: 4px;
  width: 16px;
  height: 16px;
  accent-color: var(--color-gold);
}

.form-submit {
  display: block;
  width: 100%;
  margin-top: 32px;
  background: var(--color-black);
  color: var(--color-white);
  border: 1px solid var(--color-black);
  padding: 18px 24px;
  font-family: var(--font-serif);
  font-size: 14px;
  letter-spacing: 0.32em;
  text-transform: uppercase;
  cursor: pointer;
  transition: background 0.3s, color 0.3s;
}

.form-submit:hover:not(:disabled) {
  background: var(--color-gold);
  border-color: var(--color-gold);
}

.form-submit:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

.submit-loading {
  display: none;
}

.form-submit.is-loading .submit-label {
  display: none;
}

.form-submit.is-loading .submit-loading {
  display: inline;
}

.form-message {
  margin-top: 24px;
  text-align: center;
  font-size: 15px;
  min-height: 24px;
}

.form-message.is-success {
  color: var(--color-navy);
  padding: 24px;
  background: var(--color-paper-warm);
  border-left: 2px solid var(--color-gold);
  text-align: left;
}

.form-message.is-error {
  color: #B5301F;
}

/* ========================================================================
   FAQ
   ======================================================================== */
.faq {
  margin-top: 48px;
}

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

.faq-item summary {
  font-family: var(--font-serif);
  font-size: clamp(18px, 1.8vw, 22px);
  padding: 28px 0;
  cursor: pointer;
  list-style: none;
  position: relative;
  padding-right: 40px;
  letter-spacing: 0.01em;
}

.faq-item summary::-webkit-details-marker {
  display: none;
}

.faq-item summary::after {
  content: "+";
  position: absolute;
  right: 0;
  top: 26px;
  font-size: 24px;
  color: var(--color-gold);
  transition: transform 0.3s;
  font-weight: 300;
}

.faq-item[open] summary::after {
  content: "−";
}

.faq-body {
  padding: 0 0 28px;
  color: var(--color-text-muted);
  line-height: 1.8;
  font-size: 16px;
}

/* ========================================================================
   Image Frames (for stock photos, replaceable with on-shoot footage)
   ======================================================================== */
.image-frame {
  margin: 48px auto 0;
  overflow: hidden;
  background: var(--color-paper-warm);
  position: relative;
}

.image-frame img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  filter: saturate(0.85) contrast(1.02);
  transition: filter 0.6s ease;
}

.image-frame:hover img {
  filter: saturate(0.95) contrast(1.05);
}

.image-frame-portrait {
  aspect-ratio: 4 / 5;
  max-width: 100%;
  margin-top: 40px;
}

.image-frame-wide {
  aspect-ratio: 16 / 9;
  max-width: 1100px;
}

.image-frame-experience {
  margin-top: 80px;
}

/* ========================================================================
   Footer
   ======================================================================== */
.footer {
  background: var(--color-black);
  color: var(--color-white);
  padding: 80px 24px 48px;
  text-align: center;
}

.footer-mark {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  margin-bottom: 16px;
}

.footer-kanji {
  font-family: var(--font-jp);
  font-size: 42px;
  font-weight: 400;
}

.footer-name {
  font-family: var(--font-serif);
  font-size: 22px;
  letter-spacing: 0.32em;
}

.footer-tagline {
  font-family: var(--font-serif);
  font-style: italic;
  font-size: 15px;
  color: var(--color-text-light);
  margin-bottom: 32px;
}

.footer-org {
  font-size: 13px;
  color: var(--color-text-light);
  margin-bottom: 32px;
  letter-spacing: 0.1em;
}

.footer-links {
  display: flex;
  gap: 32px;
  justify-content: center;
  margin-bottom: 48px;
  flex-wrap: wrap;
}

.footer-links a {
  font-size: 13px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--color-text-light);
  transition: color 0.2s;
}

.footer-links a:hover {
  color: var(--color-gold-soft);
}

.footer-copyright {
  font-size: 11px;
  letter-spacing: 0.2em;
  color: rgba(255, 255, 255, 0.3);
}

/* ========================================================================
   Responsive
   ======================================================================== */
@media (max-width: 960px) {
  .four-elements {
    grid-template-columns: repeat(2, 1fr);
    gap: 56px;
  }

  .two-col {
    grid-template-columns: 1fr;
    gap: 48px;
  }

  .two-col-left .display-title {
    text-align: center;
  }

  .experience-timeline {
    grid-template-columns: repeat(2, 1fr);
    gap: 40px;
  }

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

  .cities-timeline {
    grid-template-columns: repeat(5, 1fr);
    gap: 8px;
  }

  .city-name {
    font-size: 14px;
  }

  .city-year {
    font-size: 11px;
  }
}

@media (max-width: 640px) {
  .form-row {
    grid-template-columns: 1fr;
  }

  .four-elements {
    grid-template-columns: 1fr;
    gap: 48px;
  }

  .experience-timeline {
    grid-template-columns: 1fr;
  }

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

  .cities-timeline {
    grid-template-columns: 1fr;
    gap: 24px;
  }

  .cities-timeline::before {
    display: none;
  }

  .city-step {
    padding-top: 16px;
  }

  .city-step::before {
    display: none;
  }

  .hero-frame {
    padding: 40px 24px;
  }

  .logistics-list li {
    grid-template-columns: 1fr;
    gap: 4px;
  }
}

/* Reveal-on-scroll utility */
.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.8s ease-out, transform 0.8s ease-out;
}

.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}