/* ============================================
   sora.ai — Custom Styles
   Ultimate Wa-Modern Luxury Edition
   ============================================ */

:root {
  --font-mincho: 'Noto Serif JP', serif;
  --font-serif-en: 'Lora', serif;
  --font-sans-jp: 'Noto Sans JP', sans-serif;

  --navy-deep: #061520;
  --navy: #0A1E2E;
  --navy-light: #0F2D42;
  --gold: #897658;
  --gold-light: #B8A88A;
  --gold-pale: #D4C5A9;
  --rose: #E8B4B8;
  --rose-dark: #C4868C;
  --sage: #C5D5CA;
  --sage-light: #DCE8DF;
  --sage-dark: #8BAA93;
  --cream: #F5F0E8;
  --cream-warm: #EDE5D8;
  --cream-cool: #F8F5F0;

  /* ── 空（そら）カラー ── */
  --sky-deep:   #083D5F;
  --sky-mid:    #1A6EA8;
  --sky:        #4399C8;
  --sky-light:  #87CEEB;
  --sky-pale:   #C5E8F8;
  --sky-horizon:#E0F4FF;
  --cloud:      rgba(255,255,255,0.82);

  --ease-smooth: cubic-bezier(0.25, 0.46, 0.45, 0.94);
  --ease-out-expo: cubic-bezier(0.16, 1, 0.3, 1);
}

/* Base */
html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-mincho);
  background-color: #EBF5FD;
  color: var(--sky-deep);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

::selection {
  background-color: rgba(67, 153, 200, 0.25);
  color: var(--sky-deep);
}

/* ── Vertical Writing for Side Nav ── */
.writing-vertical {
  writing-mode: vertical-rl;
  text-orientation: mixed;
}

/* ── Side Navigation (PC) ── */
#side-nav {
  transition: opacity 0.8s ease, transform 0.8s ease;
}

#side-nav.side-nav-hidden {
  opacity: 0;
  transform: translate(20px, -50%);
  pointer-events: none;
}

#side-nav.side-nav-visible {
  opacity: 1;
  transform: translate(0, -50%);
  pointer-events: auto;
}

.side-nav-link.active span:last-child {
  background-color: var(--gold) !important;
  height: 1.5rem !important;
}

.side-nav-link.active span:first-child {
  color: rgba(245, 240, 232, 0.8) !important;
}

/* Loading Screen — 晴れた空テーマ */
#loading-screen {
  will-change: transform;
  background: linear-gradient(180deg,
    #0A5E96 0%,
    #2E8FCC 25%,
    #5FB8E8 55%,
    #96D5F2 80%,
    #C8ECFB 100%
  );
}

/* ローディング雲アニメーション */
@keyframes loadCloud1 {
  0%   { transform: translateX(90vw);  opacity: 0; }
  8%   { opacity: 1; }
  90%  { opacity: 0.85; }
  100% { transform: translateX(-130vw); opacity: 0; }
}
@keyframes loadCloud2 {
  0%   { transform: translateX(110vw); opacity: 0; }
  6%   { opacity: 0.75; }
  88%  { opacity: 0.65; }
  100% { transform: translateX(-100vw); opacity: 0; }
}
@keyframes loadCloud3 {
  0%   { transform: translateX(70vw);  opacity: 0; }
  10%  { opacity: 0.55; }
  85%  { opacity: 0.45; }
  100% { transform: translateX(-150vw); opacity: 0; }
}
@keyframes loadCloud4 {
  0%   { transform: translateX(130vw); opacity: 0; }
  5%   { opacity: 0.65; }
  92%  { opacity: 0.6; }
  100% { transform: translateX(-80vw);  opacity: 0; }
}

.load-cloud-1 { animation: loadCloud1 14s linear 0.2s both; }
.load-cloud-2 { animation: loadCloud2 20s linear 0s   both; }
.load-cloud-3 { animation: loadCloud3 18s linear 0.8s both; }
.load-cloud-4 { animation: loadCloud4 24s linear 0.3s both; }

/* ローディング ロゴ色（明るい空背景用） */
#loading-screen .logo-path { stroke: rgba(8,61,95,0.75); }
#loading-screen .logo-dot  { fill: #083D5F; }
#loading-screen .logo-text { fill: #083D5F; }
#loading-screen #loading-brand   { color: #061520; }
#loading-screen #loading-tagline { color: #1A6EA8; }
#loading-screen #loading-bar     { background: #1A6EA8; }

/* ローディング 太陽の光（上部コーン状グラデーション） */
.loading-sunray {
  position: absolute;
  top: -40%;
  left: 50%;
  transform: translateX(-50%);
  width: 200vw;
  height: 120vh;
  background: radial-gradient(ellipse 60% 70% at 50% 0%,
    rgba(255,240,180,0.25) 0%,
    rgba(255,220,100,0.12) 30%,
    transparent 65%
  );
  pointer-events: none;
  animation: sunPulse 4s ease-in-out infinite;
}
@keyframes sunPulse {
  0%, 100% { opacity: 0.7; }
  50%       { opacity: 1; }
}

/* Hero Ken Burns container */
#hero-image {
  will-change: transform;
}

/* Scroll indicator animation */
@keyframes scrollLine {
  0% { transform: translateY(-100%); }
  100% { transform: translateY(200%); }
}

.scroll-line-anim {
  animation: scrollLine 2.5s ease-in-out infinite;
}

/* Mobile Navigation */
.nav-line {
  transition: all 0.3s ease;
}

.nav-open .nav-line:first-child {
  transform: rotate(45deg) translate(2px, 2px);
}

.nav-open .nav-line:last-child {
  transform: rotate(-45deg) translate(3px, -3px);
  width: 1.5rem;
}

/* Service card hover */
.service-card {
  transition: all 0.6s var(--ease-smooth);
}

.service-card:hover {
  transform: translateY(-3px);
}

/* Map grayscale */
.map-container iframe {
  filter: grayscale(30%) contrast(90%);
  transition: filter 0.6s ease;
}

.map-container:hover iframe {
  filter: grayscale(0%) contrast(100%);
}

/* CEO portrait breathing */
#ceo-portrait {
  will-change: transform, filter;
}

/* SVG backgrounds */
.svg-bg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  overflow: hidden;
}

/* Kanji reveal */
.kanji-reveal {
  will-change: transform, opacity, filter;
}

/* Responsive hero adjustments */
@media (max-width: 767px) {
  #hero .hero-gradient {
    background: linear-gradient(
      to top,
      rgba(6, 25, 44, 0.88) 0%,
      rgba(6, 40, 65, 0.60) 40%,
      rgba(8, 55, 90, 0.22) 100%
    ) !important;
  }
}

/* Smooth link transitions */
a {
  transition: color 0.3s ease;
}

/* Hide scrollbar on loading */
body.loading {
  overflow: hidden;
}

/* Full-screen nav overlay */
#nav-overlay {
  transition: opacity 0.5s ease, visibility 0.5s ease;
}

#nav-overlay.active {
  opacity: 1 !important;
  pointer-events: auto !important;
  visibility: visible !important;
}

/* Nav link stagger animation */
.nav-link {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.4s ease, transform 0.4s ease, color 0.3s ease;
}

#nav-overlay.active .nav-link {
  opacity: 1;
  transform: translateY(0);
}

/* Phone number hover effect */
.phone-cta {
  position: relative;
}

.phone-cta::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 1px;
  background: var(--gold);
  transition: width 0.6s var(--ease-smooth);
}

.phone-cta:hover::after {
  width: 100%;
}

/* ── Decorative section transitions ── */
section {
  position: relative;
}

/* Subtle gradient transition between sections */
.section-transition-top::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 80px;
  background: linear-gradient(to bottom, rgba(6, 21, 32, 0.1), transparent);
  pointer-events: none;
}

/* ── Hero Brand Animation ── */
#hero-brand {
  position: relative;
}

/* Hero letter 3D transform setup */
.hero-letter,
#hero-letter-ai {
  display: inline-block;
  will-change: transform, opacity;
}

/* Glow pulse on hero letters (after animation completes) */
@keyframes letterGlow {
  0%, 100% { text-shadow: 0 0 0 rgba(245,240,232,0); }
  50%       { text-shadow: 0 0 40px rgba(245,240,232,0.08), 0 0 80px rgba(184,168,138,0.05); }
}

.hero-letter {
  animation: letterGlow 6s ease-in-out infinite;
  animation-delay: 2s;
}

#hero-letter-ai {
  animation: letterGlow 6s ease-in-out infinite;
  animation-delay: 2.3s;
}

/* Section draw lines */
.section-draw-line .sdl-path {
  will-change: stroke-dashoffset;
}

/* ── Service card corner bracket hover ── */
.service-card {
  position: relative;
  overflow: visible;
}

.service-card::before,
.service-card::after {
  content: '';
  position: absolute;
  width: 0;
  height: 0;
  border-style: solid;
  border-color: rgba(137, 118, 88, 0.5);
  transition: width 0.4s var(--ease-smooth), height 0.4s var(--ease-smooth);
  border-width: 0;
}

.service-card::before {
  top: -1px;
  left: -1px;
  border-top-width: 1px;
  border-left-width: 1px;
}

.service-card::after {
  bottom: -1px;
  right: -1px;
  border-bottom-width: 1px;
  border-right-width: 1px;
}

.service-card:hover::before,
.service-card:hover::after {
  width: 28px;
  height: 28px;
}

/* ── Shimmer sweep animation (CSS fallback for hero underline) ── */
@keyframes shimmerSweep {
  0%   { left: -5%;  opacity: 0; }
  5%   {              opacity: 1; }
  95%  {              opacity: 1; }
  100% { left: 105%; opacity: 0; }
}

/* ── CEO frame SVG will-change ── */
#ceo-frame {
  will-change: opacity;
}

/* ── Footer wave ── */
.footer-wave {
  will-change: stroke-dashoffset;
}

/* ━━━━━━━━━━━━━━━━━━━━━━━━━━
   ── ヘッダー（スクロール後に背景が出る） ──
   ━━━━━━━━━━━━━━━━━━━━━━━━━━ */
#site-header {
  background: transparent;
}
#site-header.scrolled {
  background: rgba(8, 50, 90, 0.92);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid rgba(90, 172, 222, 0.20);
  box-shadow: 0 2px 32px rgba(8,50,90,0.25);
}
.header-nav-link {
  position: relative;
  font-family: var(--font-mincho);
  font-size: 11px;
  color: rgba(245,240,232,0.72);
  letter-spacing: 0.25em;
  transition: color 0.3s ease;
}
.header-nav-link::after {
  content: '';
  position: absolute;
  bottom: -3px; left: 0;
  width: 0; height: 1px;
  background: var(--sky-light);
  transition: width 0.4s var(--ease-smooth);
}
.header-nav-link:hover { color: #fff; }
.header-nav-link:hover::after { width: 100%; }

/* ── 電話 CTA（ヘッダー内） ── */
.header-tel {
  font-family: var(--font-serif-en);
  font-size: 13px;
  color: var(--sky-light);
  letter-spacing: 0.08em;
  border: 1px solid rgba(135,206,235,0.35);
  padding: 6px 16px;
  border-radius: 1px;
  transition: all 0.3s ease;
}
.header-tel:hover {
  background: rgba(135,206,235,0.1);
  border-color: var(--sky-light);
  color: #fff;
}

/* ━━━━━━━━━━━━━━━━━━━━━━━━━━
   ── 空グラデーション背景 ──
   ━━━━━━━━━━━━━━━━━━━━━━━━━━ */
.sky-gradient-bg {
  background: linear-gradient(180deg,
    #0B4F80 0%,
    #1A6EA8 30%,
    #4399C8 65%,
    #87CEEB 100%
  );
}
.sky-gradient-light {
  background: linear-gradient(180deg,
    #C5E8F8 0%,
    #E0F4FF 50%,
    #F0F8FF 100%
  );
}

/* ━━━━━━━━━━━━━━━━━━━━━━━━━━
   ── 雲（Cloud SVG） ──
   ━━━━━━━━━━━━━━━━━━━━━━━━━━ */
/* フィロソフィーセクション 浮遊雲（X + Y 複合ドリフト） */
@keyframes driftCloud1 {
  0%,100% { transform: translateX(0px)   translateY(0px); }
  30%     { transform: translateX(22px)  translateY(-8px); }
  65%     { transform: translateX(30px)  translateY(-3px); }
}
@keyframes driftCloud2 {
  0%,100% { transform: translateX(0px)   translateY(0px); }
  35%     { transform: translateX(-18px) translateY(-10px); }
  70%     { transform: translateX(-25px) translateY(-5px); }
}
@keyframes driftCloud3 {
  0%,100% { transform: translateX(0px)   translateY(0px); }
  40%     { transform: translateX(15px)  translateY(-6px); }
  75%     { transform: translateX(22px)  translateY(-2px); }
}
.cloud-1 { animation: driftCloud1 32s ease-in-out infinite; }
.cloud-2 { animation: driftCloud2 42s ease-in-out infinite; }
.cloud-3 { animation: driftCloud3 26s ease-in-out infinite; }

/* サービス遷移セクション 積乱雲 ゆっくり浮遊 */
@keyframes floatScA {
  0%,100% { transform: translateX(0px)   translateY(0px); }
  40%     { transform: translateX(16px)  translateY(-10px); }
  70%     { transform: translateX(24px)  translateY(-5px); }
}
@keyframes floatScB {
  /* left:50% + translateX(-50%) を維持しつつ Y 方向にアニメーション */
  0%,100% { transform: translateX(-50%) translateY(0px); }
  35%     { transform: translateX(-50%) translateY(-12px); }
  68%     { transform: translateX(-50%) translateY(-6px); }
}
@keyframes floatScC {
  0%,100% { transform: translateX(0px)   translateY(0px); }
  38%     { transform: translateX(-18px) translateY(-8px); }
  72%     { transform: translateX(-28px) translateY(-4px); }
}
.sc-cloud-a { animation: floatScA 26s ease-in-out infinite; }
.sc-cloud-b { animation: floatScB 34s ease-in-out infinite 3s; }
.sc-cloud-c { animation: floatScC 22s ease-in-out infinite 1.5s; }

/* ── セクション区切り雲 ── */
.cloud-divider {
  width: 100%;
  line-height: 0;
  overflow: hidden;
  pointer-events: none;
}
.cloud-divider svg {
  display: block;
  width: 100%;
}

/* ── 空テーマのテキスト調整 ── */
.sky-section h2,
.sky-section h3 { color: #fff; }
.sky-section p   { color: rgba(255,255,255,0.82); }

/* ── Services セクション（水色系） ── */
#services {
  background: linear-gradient(180deg, #E0F4FF 0%, #F0F8FF 40%, #F5F0E8 100%);
}
#services .service-card {
  background: rgba(255,255,255,0.85);
  border-color: rgba(67,153,200,0.12);
}
#services .service-card:hover {
  border-color: rgba(67,153,200,0.35);
  box-shadow: 0 8px 32px rgba(26,110,168,0.10);
}

/* ── Recruitment セクション（空グラデ） ── */
#recruitment {
  background: linear-gradient(180deg, #1A6EA8 0%, #4399C8 55%, #87CEEB 100%);
}

/* ── Company セクション ── */
#company {
  background: linear-gradient(180deg, #E8F4FD 0%, #F5F0E8 100%);
}

/* ── Company テキスト色修正（ライト背景） ── */
#company .company-heading {
  color: var(--sky-deep) !important;
}
#company .company-dt {
  color: var(--sky-mid) !important;
}
#company .company-dd {
  color: rgba(8,61,95,0.78) !important;
}
#company .company-note {
  color: rgba(8,61,95,0.42) !important;
}

/* ── Recruitment 採用情報テキスト修正（ダーク背景） ── */
#recruitment .recruit-heading {
  color: #fff !important;
}
#recruitment .recruit-sub {
  color: rgba(255,255,255,0.80) !important;
}
#recruitment .recruit-voice-box {
  background: rgba(255,255,255,0.14) !important;
}
#recruitment .recruit-voice-title {
  color: #fff !important;
}
#recruitment .recruit-voice-text {
  color: rgba(255,255,255,0.82) !important;
}
#recruitment .recruit-voice-sig {
  color: rgba(255,255,255,0.50) !important;
}

/* ── Footer（淡い青テーマ：ネイビー深黒 → ダーク空色） ── */
footer#contact {
  background-color: #0B3D62 !important;
  border-top-color: rgba(67, 153, 200, 0.18) !important;
}

/* ━━━━━━━━━━━━━━━━━━━━━━━━━━
   ── お問い合わせフォーム ──
   ━━━━━━━━━━━━━━━━━━━━━━━━━━ */
#contact-section {
  background: linear-gradient(180deg, #C5E8F8 0%, #E0F4FF 45%, #F5F0E8 100%);
}

.contact-input {
  width: 100%;
  background: rgba(255,255,255,0.88);
  border: 1px solid rgba(67,153,200,0.25);
  padding: 14px 18px;
  font-family: var(--font-sans-jp);
  font-size: 14px;
  color: var(--navy);
  transition: border-color 0.3s ease, box-shadow 0.3s ease, background 0.3s ease;
  border-radius: 1px;
  -webkit-appearance: none;
}
.contact-input:focus {
  outline: none;
  border-color: var(--sky);
  background: #fff;
  box-shadow: 0 0 0 3px rgba(67,153,200,0.12);
}
.contact-input::placeholder {
  color: rgba(10,30,46,0.35);
}
textarea.contact-input {
  resize: vertical;
  min-height: 140px;
}

.contact-label {
  display: block;
  font-family: var(--font-mincho);
  font-size: 12px;
  color: var(--sky-deep);
  letter-spacing: 0.18em;
  margin-bottom: 8px;
}
.contact-label .req {
  color: #D85050;
  font-size: 10px;
  margin-left: 4px;
  letter-spacing: 0;
}

.contact-btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  background: var(--sky-deep);
  color: var(--cream);
  font-family: var(--font-mincho);
  font-size: 14px;
  letter-spacing: 0.2em;
  padding: 16px 48px;
  border: none;
  cursor: pointer;
  transition: background 0.3s ease, transform 0.2s ease;
  position: relative;
  overflow: hidden;
}
.contact-btn::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(120deg, transparent 40%, rgba(255,255,255,0.07) 50%, transparent 60%);
  transform: translateX(-100%);
  transition: transform 0.5s ease;
}
.contact-btn:hover::before { transform: translateX(100%); }
.contact-btn:hover { background: var(--sky-mid); }
.contact-btn:disabled { background: #8899AA; cursor: not-allowed; }
.contact-btn:disabled::before { display: none; }

.contact-success {
  display: none;
  text-align: center;
  padding: 40px 20px;
}
.contact-success.show { display: block; }
.contact-form-wrap.hide { display: none; }