/* ============================================================
  Lumina Contact Form - Main Stylesheet
  Design: Mobile-first, 8pt grid, clean modern
============================================================ */

/* --- CSS Variables --- */
:root {
  /* Colors */
  --color-white:       #ffffff;
  --color-black:       #000000;
  --color-bg:          #faf8f5;
  --color-bg-dark:     #0d1a2f;
  --color-bg-section:  #f0f4f8;
  
  --color-blue-900:    #0a1628;
  --color-blue-800:    #0d2244;
  --color-blue-700:    #103570;
  --color-blue-600:    #1a4fa0;
  --color-blue-500:    #2060c8;
  --color-blue-400:    #4a80e0;
  --color-blue-100:    #dce9fb;
  --color-blue-50:     #edf3fd;
  --color-cyan-500:    #00c8b4;
  --color-cyan-400:    #1de0cc;
  --color-cyan-100:    #ccf5f1;
  --color-cyan-50:     #e6faf8;
  --color-orange-500:  #f97316;
  --color-orange-100:  #fde8d3;
  --color-green-500:   #22c55e;
  --color-green-100:   #dcfce7;
  --color-gray-900:    #111827;
  --color-gray-800:    #1f2937;
  --color-gray-700:    #374151;
  --color-gray-600:    #4b5563;
  --color-gray-500:    #6b7280;
  --color-gray-300:    #d1d5db;
  --color-gray-200:    #e5e7eb;
  --color-gray-100:    #f3f4f6;
  --color-gray-50:     #f9fafb;
  --color-purple: #6B3FA0;
  --color-purple-dark: #3e1e64;
  --color-purple-light: #8B55C8;
  --color-purple-pale: #f5eeff;
  --color-rose: #E8558A;
  --color-rose-light: #F27BAA;
  --color-rose-pale: #fde8f1;
  --color-rose-dark: #c43a6e;

  --color-gold: #C9A96E;
  --color-gold-light: #e8d5b0;
  --color-gold-dark: #A07840;
  --color-ivory: #f0eae0;
  --color-ivory-light: #FAF8F5;
  --color-ivory-dark: #C3B7A7;
  --color-gray: #615C58;
  --color-gray-dark: #4D4845;

  --color-white: #ffffff;
  --color-off-white: #fdfbff;

  --color-bg-light: #faf5ff;
  --color-bg-rose: #fff5f9;
  --color-bg-ivory: #f0eae0;
  --color-text-dark: #1a1020;
  --color-text-mid: #374151;
  --color-text-light: #6b7280;
  --color-border: #e8d6f5;
  --color-shadow: 0 4px 28px rgba(107, 63, 160, 0.12);
  --color-shadow-rose: 0 4px 28px rgba(232, 85, 138, 0.18);
  --color-shadow-strong: 0 10px 48px rgba(107, 63, 160, 0.22);
  --color-radius: 20px;
  --color-dark: #1A1614;

  /* Typography */
  --font-sans: 'Noto Sans JP', 'Inter', sans-serif;
  --font-inter: 'Inter', 'Noto Sans JP', sans-serif;

  /* Spacing (8pt grid) */
  --space-1:   8px;
  --space-2:   16px;
  --space-3:   24px;
  --space-4:   32px;
  --space-5:   40px;
  --space-6:   48px;
  --space-7:   56px;
  --space-8:   64px;
  --space-10:  80px;
  --space-12:  96px;
  --space-16: 128px;

  /* Border */
  --radius-sm:  8px;
  --radius-md:  12px;
  --radius-lg:  16px;
  --radius-xl:  24px;
  --radius-full: 999px;

  /* Shadow */
  --shadow-sm:  0 1px 3px rgba(0,0,0,.06), 0 1px 2px rgba(0,0,0,.04);
  --shadow-md:  0 4px 12px rgba(0,0,0,.08), 0 2px 6px rgba(0,0,0,.05);
  --shadow-lg:  0 8px 24px rgba(0,0,0,.10), 0 4px 12px rgba(0,0,0,.06);
  --shadow-xl:  0 16px 48px rgba(0,0,0,.12);
  --shadow-blue: 0 8px 24px rgba(32,96,200,.22);

  /* Transition */
  --transition: 0.22s cubic-bezier(.4,0,.2,1);

  /* Container */
  --container-max: 1200px;
  --container-pad: 24px;
}

/* ============================================================
   RESET & BASE
============================================================ */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; }
body {
  /*
  font-family: var(--font-sans);
  font-family:'Noto Sans JP','Yu Gothic','Hiragino Kaku Gothic ProN',sans-serif;
  */
  font-family:'Noto Serif JP',serif;

  color: var(--color-gray-800);
  background: linear-gradient(160deg, var(--color-white) 0%, var(--color-bg-ivory) 60%, var(--color-bg-light) 100%);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; height: auto; display: block; }
a { color: inherit; text-decoration: none; transition: color var(--transition); }
ul { list-style: none; }
button { cursor: pointer; border: none; background: none; font-family: inherit; }

/* ============================================================
   LAYOUT
============================================================ */
.container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--container-pad);
}
.sp-only { display: none; }

/* ============================================================
   TYPOGRAPHY
============================================================ */
.section-title {
  font-size: clamp(1.6rem, 4vw, 2.5rem);
  font-weight: 900;
  line-height: 1.25;
  letter-spacing: -0.01em;
  color: var(--color-gray-900);
  margin-bottom: var(--space-2);
}
.section-sub {
  font-size: 1.05rem;
  color: var(--color-gray-600);
  line-height: 1.75;
  max-width: 640px;
}
.text-white { color: var(--color-white) !important; }
.text-light-sub { color: rgba(255,255,255,0.72) !important; }

/* Gradient text */
.highlight-gradient {
  background: linear-gradient(135deg, #2060c8 0%, #00c8b4 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.highlight-cyan {
  background: linear-gradient(135deg, #1de0cc 0%, #00c8b4 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* ============================================================
   COMPONENTS: Buttons
============================================================ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 14px 28px;
  border-radius: var(--radius-md);
  font-size: 1rem;
  font-weight: 700;
  transition: all var(--transition);
  white-space: nowrap;
  cursor: pointer;
  text-decoration: none;
}
.btn-primary {
  background: var(--color-blue-600);
  color: var(--color-white);
  box-shadow: var(--shadow-blue);
}
.btn-primary:hover {
  background: var(--color-blue-700);
  transform: translateY(-2px);
  box-shadow: 0 12px 32px rgba(32,96,200,.32);
}
.btn-secondary {
  background: var(--color-white);
  color: var(--color-blue-600);
  border: 2px solid var(--color-blue-100);
  box-shadow: var(--shadow-sm);
}
.btn-secondary:hover {
  border-color: var(--color-blue-400);
  background: var(--color-blue-50);
  transform: translateY(-2px);
}
.btn-ghost {
  background: transparent;
  color: var(--color-blue-600);
  border: 2px solid var(--color-blue-200, #b3ceef);
}
.btn-ghost:hover {
  background: var(--color-blue-50);
  border-color: var(--color-blue-400);
}
.btn-cyan {
  background: var(--color-cyan-500);
  color: var(--color-white);
  box-shadow: 0 6px 20px rgba(0,200,180,.28);
}
.btn-cyan:hover {
  background: #009e8c;
  transform: translateY(-2px);
}
.btn-white {
  background: var(--color-white);
  color: var(--color-blue-700);
  box-shadow: var(--shadow-md);
}
.btn-white:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}
.btn-cyan-outline {
  background: transparent;
  color: var(--color-white);
  border: 2px solid rgba(255,255,255,.5);
}
.btn-cyan-outline:hover {
  background: rgba(255,255,255,.1);
  border-color: var(--color-white);
}
.btn-sm { padding: 10px 20px; font-size: .875rem; border-radius: var(--radius-sm); }
.btn-lg { padding: 16px 32px; font-size: 1.05rem; border-radius: var(--radius-lg); }
.btn-xl { padding: 18px 40px; font-size: 1.1rem; border-radius: var(--radius-lg); }
.btn-block { width: 100%; margin-top: var(--space-3); }

/* ============================================================
   COMPONENTS: Section Header
============================================================ */
.section-header {
  text-align: center;
  margin-bottom: var(--space-8);
}
.section-header .section-sub {
  margin: 0 auto;
  text-align: center;
}

/* ============================================================
   HEADER
============================================================ */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  border-bottom: 2px solid var(--rose-pale);
  transition: box-shadow var(--transition);
  background: rgba(250, 248, 245, 0.98);
  box-shadow: 0 1px 16px rgba(26, 22, 20, 0.07);
}
.site-header.scrolled {
  box-shadow: var(--shadow-md);
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
  gap: var(--space-3);
}
.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 900;
  font-size: 1.35rem;
  color: var(--color-black);
  letter-spacing: -.02em;
}
.logo-text { font-family: var(--font-inter); }

/* ============================================================
   HERO
============================================================ */
.section-hero {
  position: relative;
  padding-top: calc(72px + var(--space-10));
  padding-bottom: var(--space-10);
  overflow: hidden;
  background: linear-gradient(160deg, #eef4fd 0%, #f8fafc 40%, #e8faf7 100%);
}
.hero-bg-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(32,96,200,.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(32,96,200,.04) 1px, transparent 1px);
  background-size: 40px 40px;
  pointer-events: none;
}
.hero-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-8);
  align-items: center;
}
/* Hero Copy */
.hero-heading {
  font-size: clamp(2rem, 4.5vw, 3.2rem);
  font-weight: 900;
  line-height: 1.18;
  letter-spacing: -.02em;
  margin-bottom: var(--space-3);
  color: var(--color-gray-900);
}
.hero-sub {
  font-size: 1.05rem;
  color: var(--color-gray-600);
  line-height: 1.8;
  margin-bottom: var(--space-4);
}
.hero-sub strong { color: var(--color-blue-700); }

/* ============================================================
   FOOTER
============================================================ */
.site-footer-bottom {
  background: var(--color-dark);
  color: rgba(255,255,255,.7);
}
.footer-inner {
  text-align: center;
}
.logo-footer .logo-text { color: var(--color-white); }
.logo-footer .logo-icon { background: rgba(255,255,255,.12); }
.footer-brand {
  padding: var(--space-3) var(--container-pad) 0;
  display: flex;
  flex-direction: column;
  align-items: center;
}
.footer-brand .logo-en {
  font-size: 2rem;
  margin-bottom: 0.3rem;
  font-family: 'Cormorant Garamond','EB Garamond',serif;
  font-size: 1.9rem;
  font-weight: 600;
  color: var(--color-gold);
  letter-spacing: 0.2em;
  line-height: 1;
  transition: var(--transition);
}
.footer-tagline {
  font-size: .82rem;
  color: rgba(255,255,255,.5);
  margin-top: var(--space-2);
  line-height: 1.6;
}
.footer-links {
  display: flex;
  gap: var(--space-8);
  flex-wrap: wrap;
}
.footer-col {
  display: flex;
  flex-direction: column;
  gap: 10px;
  min-width: 120px;
}
.footer-col-title {
  font-size: .75rem;
  font-weight: 700;
  color: rgba(255,255,255,.4);
  letter-spacing: .08em;
  text-transform: uppercase;
  margin-bottom: 4px;
}
.footer-col a {
  font-size: .85rem;
  color: rgba(255,255,255,.65);
  transition: color var(--transition);
}
.footer-col a:hover { color: var(--color-white); }
.footer-bottom {
  padding: var(--space-3) var(--container-pad);
  text-align: center;
  font-size: .8rem;
  color: rgba(255,255,255,.35);
}
.footer-bottom.bar {
  border-top: 1px solid rgba(255, 255, 255, .08);
}

/* ============================================================
   ANIMATIONS
============================================================ */
[data-animate] {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}
[data-animate="fade-left"] {
  transform: translateX(32px);
}
[data-animate].is-visible {
  opacity: 1;
  transform: none;
}

/* ============================================================
   RESPONSIVE — Tablet (≤ 1024px)
============================================================ */
@media (max-width: 1024px) {
  :root { --container-pad: 20px; }

  .hero-inner {
    grid-template-columns: 1fr;
    text-align: center;
    max-width: 640px;
    margin: 0 auto;
  }

  .footer-links { gap: var(--space-5); }
}

/* ============================================================
   RESPONSIVE — Mobile (≤ 768px)
============================================================ */
@media (max-width: 768px) {
  :root {
    --container-pad: 16px;
    --space-16: 80px;
    --space-12: 64px;
    --space-10: 56px;
  }

  .sp-only { display: inline; }

  .section-hero {
    padding-top: calc(72px + var(--space-5));
    padding-bottom: var(--space-8);
  }
  .hero-heading { font-size: clamp(1.7rem, 7vw, 2.2rem); }
}

/* ============================================================
   RESPONSIVE — Small Mobile (≤ 430px)
============================================================ */
@media (max-width: 430px) {
  .hero-heading { font-size: 1.65rem; }
  .section-title { font-size: 1.5rem; }
  .btn-xl { padding: 16px 28px; font-size: 1rem; }
}

/* ============================================================
   EXTRAS: Polish & Accessibility
============================================================ */
/* Focus styles */
a:focus-visible,
button:focus-visible {
  outline: 3px solid var(--color-cyan-500);
  outline-offset: 3px;
  border-radius: 4px;
}

/* Selection */
::selection {
  background: var(--color-blue-100);
  color: var(--color-blue-900);
}

/* Scrollbar (Webkit) */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--color-gray-100); }
::-webkit-scrollbar-thumb {
  background: var(--color-blue-300, #93b8e8);
  border-radius: 3px;
}

/* Hero: on desktop ensure visual doesn't clip */
@media (min-width: 1025px) {
  .hero-inner {
    min-height: 640px;
  }
  .hero-visual {
    position: relative;
    z-index: 1;
  }
}

/* Btn: enforce min tap target on mobile */
@media (max-width: 768px) {
  .btn {
    min-height: 48px;
  }
  .btn-sm {
    min-height: 40px;
  }
}

/* Gradient text fallback */
@supports not (-webkit-background-clip: text) {
  .highlight-gradient { color: var(--color-blue-600); }
  .highlight-cyan { color: var(--color-cyan-500); }
}

/* Backdrop filter fallback */
@supports not (backdrop-filter: blur(1px)) {
  .site-header { background: rgba(255,255,255,.98); }
}

/* Print styles */
@media print {
  .site-header,
  .scroll-hint,
  .final-cta-actions,
  .section-cta { display: none !important; }
  body { font-size: 12pt; }
  .section-hero { padding-top: 0; }
  [data-animate] { opacity: 1 !important; transform: none !important; }
}

/* ============================================================
   LUMINA COMMON - LUXURY VISUAL REFRESH
   ヘッダー・フッター・共通要素
   2026-07
============================================================ */

:root {
  /* Warm luxury palette */
  --color-bg: #fbf8f5;
  --color-bg-section: #f7f1ec;
  --color-bg-light: #faf5f6;
  --color-bg-rose: #fbf1f2;
  --color-bg-ivory: #f5eee7;

  --color-text-dark: #403833;
  --color-text-mid: #554c47;
  --color-text-light: #7a706a;

  --color-gray-900: #403833;
  --color-gray-800: #4b423d;
  --color-gray-700: #615752;
  --color-gray-600: #766c66;
  --color-gray-500: #928780;
  --color-gray-300: #d8cec7;
  --color-gray-200: #e7ded8;
  --color-gray-100: #f3eeea;
  --color-gray-50: #faf7f5;

  --color-gold: #bda06d;
  --color-gold-light: #eee1ca;
  --color-gold-dark: #927347;

  --color-ivory: #f5eee7;
  --color-ivory-light: #fffdfb;
  --color-ivory-dark: #d6c6b9;

  --color-rose: #b9787b;
  --color-rose-light: #d7a8aa;
  --color-rose-pale: #f8e9e9;
  --color-rose-dark: #9f6266;

  --color-dark: #211b19;
  --color-border: #e4d9d0;

  --color-shadow:
    0 8px 28px rgba(88, 66, 54, 0.08);

  --color-shadow-rose:
    0 8px 28px rgba(159, 98, 102, 0.11);

  --color-shadow-strong:
    0 18px 46px rgba(88, 66, 54, 0.13);

  --shadow-sm:
    0 2px 5px rgba(88, 66, 54, 0.06);

  --shadow-md:
    0 5px 15px rgba(88, 66, 54, 0.08);

  --shadow-lg:
    0 10px 26px rgba(88, 66, 54, 0.1);

  --shadow-xl:
    0 18px 42px rgba(88, 66, 54, 0.11);
}

/* ============================================================
   BASE
============================================================ */

html {
  background: #fffdfb;
}

body {
  color: var(--color-text-mid);
  background:
    radial-gradient(
      circle at 10% 8%,
      rgba(226, 194, 184, 0.1),
      transparent 30%
    ),
    linear-gradient(
      160deg,
      #fffdfb 0%,
      #f8f3ef 62%,
      #faf4f6 100%
    );
}

a {
  text-underline-offset: 0.18em;
}

.section-title {
  color: var(--color-text-dark);
  font-weight: 600;
  letter-spacing: 0.03em;
}

.section-sub {
  color: var(--color-text-light);
}

/* ============================================================
   GRADIENT TEXT
============================================================ */

.highlight-gradient,
.highlight-cyan {
  background:
    linear-gradient(
      135deg,
      #8f7045 0%,
      #c5a977 48%,
      #a96d72 100%
    );
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* ============================================================
   COMMON BUTTONS
============================================================ */

.btn {
  border-radius: 10px;
  font-weight: 600;
  letter-spacing: 0.05em;
}

.btn-primary,
.btn-cyan {
  color: #3f321f;
  background:
    linear-gradient(
      110deg,
      #f2e7d2 0%,
      #d5ba82 24%,
      #b68f50 50%,
      #ddc28d 74%,
      #f1e5cf 100%
    );
  background-size: 160% 100%;
  border: 1px solid #a98247;
  box-shadow:
    0 9px 22px rgba(103, 75, 35, 0.17),
    inset 0 1px 0 rgba(255, 255, 255, 0.72);
}

.btn-primary:hover,
.btn-cyan:hover {
  color: #372a19;
  background-position: 100% 0;
  transform: translateY(-2px);
  box-shadow:
    0 13px 28px rgba(103, 75, 35, 0.22),
    inset 0 1px 0 rgba(255, 255, 255, 0.8);
}

.btn-secondary,
.btn-white {
  color: #5e5149;
  background:
    linear-gradient(
      180deg,
      #ffffff 0%,
      #f4efeb 100%
    );
  border: 1px solid #d8cbc1;
  box-shadow:
    0 6px 16px rgba(88, 66, 54, 0.08);
}

.btn-secondary:hover,
.btn-white:hover {
  color: #4b413b;
  background:
    linear-gradient(
      180deg,
      #ffffff 0%,
      #ece4de 100%
    );
  border-color: #c9b9ac;
}

.btn-ghost,
.btn-cyan-outline {
  color: var(--color-gold-dark);
  border: 1px solid rgba(146, 115, 71, 0.5);
}

.btn-ghost:hover,
.btn-cyan-outline:hover {
  color: #5a4630;
  background: rgba(238, 225, 202, 0.36);
  border-color: var(--color-gold-dark);
}

/* ============================================================
   HEADER
============================================================ */

.site-header {
  border-bottom: 1px solid rgba(189, 160, 109, 0.34);
  background: rgba(255, 253, 250, 0.96);
  box-shadow:
    0 2px 18px rgba(88, 66, 54, 0.055);
  backdrop-filter: blur(10px);
}

.site-header.scrolled {
  box-shadow:
    0 5px 20px rgba(88, 66, 54, 0.08);
}

.header-inner {
  height: 72px;
}

.logo {
  color: var(--color-text-dark);
}

.logo img {
  filter: drop-shadow(0 1px 1px rgba(88, 66, 54, 0.05));
}

/* ============================================================
   HERO
============================================================ */

.section-hero {
  background:
    radial-gradient(
      ellipse at 88% 16%,
      rgba(222, 190, 153, 0.18),
      transparent 44%
    ),
    radial-gradient(
      ellipse at 10% 88%,
      rgba(215, 168, 170, 0.16),
      transparent 48%
    ),
    linear-gradient(
      145deg,
      #fffaf7 0%,
      #f8eee9 50%,
      #fbf4f5 100%
    );
}

.hero-bg-grid {
  background-image:
    linear-gradient(
      rgba(189, 160, 109, 0.035) 1px,
      transparent 1px
    ),
    linear-gradient(
      90deg,
      rgba(189, 160, 109, 0.035) 1px,
      transparent 1px
    );
}

.hero-heading {
  color: var(--color-text-dark);
  font-weight: 600;
  letter-spacing: 0.01em;
}

.hero-sub {
  color: var(--color-text-light);
}

.hero-sub strong {
  color: var(--color-rose-dark);
}

/* ============================================================
   FOOTER
============================================================ */

.site-footer-bottom {
  position: relative;
  color: rgba(255, 250, 246, 0.72);
  background:
    linear-gradient(
      145deg,
      #211b19 0%,
      #2a211e 55%,
      #1d1816 100%
    );
  border-top: 1px solid rgba(189, 160, 109, 0.34);
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, 0.025);
}

.site-footer-bottom::before {
  position: absolute;
  top: 0;
  left: 50%;
  width: min(280px, 48%);
  height: 1px;
  background:
    linear-gradient(
      90deg,
      transparent,
      rgba(224, 197, 149, 0.75),
      transparent
    );
  content: "";
  transform: translateX(-50%);
}

.footer-brand .logo-en {
  color: #d8bd88;
  text-shadow:
    0 1px 8px rgba(216, 189, 136, 0.12);
}

.footer-tagline {
  color: rgba(255, 250, 246, 0.52);
}

.footer-col-title {
  color: rgba(255, 250, 246, 0.4);
}

.footer-col a {
  color: rgba(255, 250, 246, 0.66);
}

.footer-col a:hover {
  color: #e4c995;
}

.footer-bottom {
  color: rgba(255, 250, 246, 0.36);
}

.footer-bottom.bar {
  border-top-color: rgba(255, 255, 255, 0.065);
}

/* ============================================================
   ACCESSIBILITY / POLISH
============================================================ */

a:focus-visible,
button:focus-visible {
  outline: 3px solid rgba(189, 160, 109, 0.42);
  outline-offset: 3px;
}

::selection {
  color: #403321;
  background: #ead9b9;
}

::-webkit-scrollbar-track {
  background: #f2ece7;
}

::-webkit-scrollbar-thumb {
  background:
    linear-gradient(
      180deg,
      #cbb18a,
      #a9895d
    );
  border-radius: 999px;
}

@supports not (backdrop-filter: blur(1px)) {
  .site-header {
    background: rgba(255, 253, 250, 0.98);
  }
}

@media (max-width: 768px) {
  .site-header {
    backdrop-filter: none;
  }
}

@media (prefers-reduced-motion: reduce) {
  .btn,
  .site-header,
  a {
    transition: none;
  }
}