/*
Theme Name: UNCORD
Theme URI: https://uncord-inc.com/
Author: 株式会社UNCORD 開発部
Description: 株式会社UNCORD コーポレートサイト用クラシックテーマ。demo/design-a.html デザインモック（案A: REFERENCE+）の忠実移植（Sprint 1）。共通CSS（リセット/変数/photo-slot/カーソル/ヘッダー/フッター/リビール/ページヒーロー/CTA/フレームパターン）を収録し、ページ固有CSSは各テンプレート内の style に残す。
Version: 0.1.0
Requires PHP: 8.0
License: proprietary
Text Domain: uncord
*/

/* =========================================================
   共通CSS（抽出元: demo/design-a.html / demo/STYLEGUIDE.md）
   見た目はモックと同一。独自アレンジ禁止（詳細設計書 §2）
   ========================================================= */

/* ===== RESET & BASE ===== */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; font-size: 16px; }
body {
  font-family: 'Inter', 'Noto Sans JP', sans-serif;
  background: #000;
  color: #fff;
  overflow-x: hidden;
  line-height: 1.8;
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }

/* ===== COLOR VARIABLES ===== */
:root {
  --black: #000000;
  --white: #ffffff;
  --yellow: #FFD600;
  --yellow-light: #FFF176;
  --gray-dark: #1a1a1a;
  --gray: #333333;
  --gray-light: #888888;
  --gray-lighter: #f5f5f5;
}

/* ===== 写真プレースホルダー枠（後から写真を差し込む用・番号付き）===== */
.photo-slot{position:relative;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:8px;width:100%;height:100%;min-height:180px;background:repeating-linear-gradient(45deg,#141414,#141414 12px,#181818 12px,#181818 24px);border:2px dashed rgba(255,214,0,0.55);border-radius:4px;color:#f5f5f5;text-align:center;padding:16px;box-sizing:border-box;overflow:hidden;}
.photo-slot__id{font-family:'Sora','Inter',sans-serif;font-weight:800;font-size:1.5rem;letter-spacing:0.08em;color:#FFD600;line-height:1;}
.photo-slot__note{font-size:0.8rem;color:#d0d0d0;max-width:92%;line-height:1.45;}
.photo-slot__spec{font-size:0.7rem;color:#8a8a8a;letter-spacing:0.05em;}
.photo-slot::before{content:"PHOTO";position:absolute;top:8px;left:10px;font-size:0.6rem;letter-spacing:0.2em;color:rgba(255,214,0,0.6);}
/* 差し込み済み写真（photo-slotをimgに置き換えたもの） */
.slot-photo{display:block;width:100%;height:100%;object-fit:cover;}

/* 画面外に出た常時アニメーションの一時停止用（IntersectionObserverで付与） */
.anim-paused,
.anim-paused .particle{animation-play-state:paused !important;}

/* ===== CUSTOM CURSOR ===== */
.cursor-dot {
  width: 8px; height: 8px;
  background: var(--yellow);
  border-radius: 50%;
  position: fixed;
  pointer-events: none;
  z-index: 9999;
  transition: transform 0.1s;
}
.cursor-outline {
  width: 36px; height: 36px;
  border: 1.5px solid var(--yellow);
  border-radius: 50%;
  position: fixed;
  pointer-events: none;
  z-index: 9998;
  transition: transform 0.15s ease-out;
}

/* Cursor grow on hover over interactive */
.cursor-grow .cursor-outline {
  transform: scale(2);
  border-color: rgba(255,214,0,0.3);
}

/* Scroll progress bar */
.scroll-progress {
  position: fixed;
  top: 0; left: 0;
  width: 0;
  height: 3px;
  background: var(--yellow);
  z-index: 10001;
  transition: none;
}

/* ===== HEADER / NAV ===== */
header {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 1000;
  padding: 20px 48px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  mix-blend-mode: difference;
  transition: all 0.4s ease;
}
header.scrolled {
  padding: 14px 48px;
}
.logo {
  font-size: 1.5rem;
  font-weight: 900;
  letter-spacing: 0.15em;
  color: var(--white);
}
.logo span { color: var(--yellow); }

nav { display: flex; align-items: center; gap: 36px; }
nav a {
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--white);
  position: relative;
  padding-bottom: 2px;
}
nav a::after {
  content: '';
  position: absolute;
  bottom: 0; left: 0;
  width: 0; height: 1.5px;
  background: var(--yellow);
  transition: width 0.3s ease;
}
nav a:hover::after { width: 100%; }

.nav-contact {
  background: var(--yellow);
  color: var(--black);
  padding: 10px 24px;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  border: none;
  cursor: pointer;
  transition: all 0.3s ease;
}
.nav-contact:hover {
  background: var(--white);
  transform: translateY(-2px);
}

/* ===== HAMBURGER (MOBILE) ===== */
.hamburger {
  display: none;
  flex-direction: column;
  gap: 6px;
  cursor: pointer;
  z-index: 1001;
  /* <button> のブラウザ既定スタイルを打ち消す */
  background: none;
  border: none;
  padding: 0;
  margin: 0;
  -webkit-appearance: none;
  appearance: none;
}
.hamburger span {
  width: 28px; height: 2px;
  background: var(--white);
  transition: transform 0.3s ease, opacity 0.2s ease;
}
/* 開いている間は×印に変形（線の高さ2px＋間隔6px＝8px動かすと中央で交差する）*/
.hamburger.is-open span:nth-child(1) { transform: translateY(8px) rotate(45deg); }
.hamburger.is-open span:nth-child(2) { opacity: 0; }
.hamburger.is-open span:nth-child(3) { transform: translateY(-8px) rotate(-45deg); }

/* メニューを開いている間は背面をスクロールさせない */
body.nav-open { overflow: hidden; }
/* header の mix-blend-mode: difference はメニューの黒背景と反転して読めなくなるので解除する */
body.nav-open header { mix-blend-mode: normal; }

/* ===== SECTION STYLES ===== */
section {
  padding: 140px 0;
  position: relative;
}

.section-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 48px;
}

.section-label {
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  color: var(--yellow);
  margin-bottom: 16px;
}

.section-title {
  font-size: clamp(2rem, 4vw, 3.5rem);
  font-weight: 900;
  line-height: 1.2;
  margin-bottom: 24px;
}

.section-desc {
  font-size: 0.95rem;
  color: var(--gray-light);
  max-width: 560px;
  line-height: 2;
}

/* Reveal animations */
.reveal {
  opacity: 0;
  transform: translateY(60px);
  transition: opacity 0.8s ease, transform 0.8s cubic-bezier(0.16, 1, 0.3, 1);
}
.reveal.active {
  opacity: 1;
  transform: translateY(0);
}
.reveal-left {
  opacity: 0;
  transform: translateX(-60px);
  transition: opacity 0.8s ease, transform 0.8s cubic-bezier(0.16, 1, 0.3, 1);
}
.reveal-left.active {
  opacity: 1;
  transform: translateX(0);
}
.reveal-right {
  opacity: 0;
  transform: translateX(60px);
  transition: opacity 0.8s ease, transform 0.8s cubic-bezier(0.16, 1, 0.3, 1);
}
.reveal-right.active {
  opacity: 1;
  transform: translateX(0);
}
.reveal-scale {
  opacity: 0;
  transform: scale(0.9);
  transition: opacity 0.8s ease, transform 0.8s cubic-bezier(0.16, 1, 0.3, 1);
}
.reveal-scale.active {
  opacity: 1;
  transform: scale(1);
}

/* Character-by-character text reveal */
.char-reveal .char {
  display: inline-block;
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.4s ease, transform 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}
.char-reveal.active .char {
  opacity: 1;
  transform: translateY(0);
}

/* Section divider line wipe */
.section-divider {
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--yellow), transparent);
  transform: scaleX(0);
  transition: transform 1.2s cubic-bezier(0.16, 1, 0.3, 1);
  margin: 0;
}
.section-divider.active {
  transform: scaleX(1);
}

/* Stagger children */
.stagger-children > * {
  opacity: 0;
  transform: translateY(40px);
  transition: opacity 0.6s ease, transform 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}
.stagger-children.active > *:nth-child(1) { transition-delay: 0.05s; }
.stagger-children.active > *:nth-child(2) { transition-delay: 0.12s; }
.stagger-children.active > *:nth-child(3) { transition-delay: 0.19s; }
.stagger-children.active > *:nth-child(4) { transition-delay: 0.26s; }
.stagger-children.active > *:nth-child(5) { transition-delay: 0.33s; }
.stagger-children.active > *:nth-child(6) { transition-delay: 0.40s; }
.stagger-children.active > * {
  opacity: 1;
  transform: translateY(0);
}

/* Smooth clip-path reveal for sections */
.clip-reveal {
  clip-path: inset(0 0 100% 0);
  transition: clip-path 1s cubic-bezier(0.16, 1, 0.3, 1);
}
.clip-reveal.active {
  clip-path: inset(0 0 0% 0);
}

/* ===== Horizontal line animation ===== */
.h-line {
  width: 0;
  height: 1px;
  background: var(--yellow);
  transition: width 1s ease;
}
.h-line.active { width: 60px; }

/* ===== BUTTONS ===== */
.btn-arrow {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  color: var(--yellow);
  transition: gap 0.3s ease;
}
.btn-arrow:hover { gap: 20px; }
.btn-arrow svg {
  width: 40px;
  height: 1px;
  stroke: var(--yellow);
}

/* Magnetic button */
.magnetic-btn {
  position: relative;
  transition: transform 0.3s cubic-bezier(0.03, 0.98, 0.52, 0.99);
}

/* ===== CONTACT CTA ===== */
.contact-cta {
  background: var(--yellow);
  color: var(--black);
  padding: 120px 0;
  text-align: center;
  position: relative;
  overflow: hidden;
}
.contact-cta::before {
  content: 'CONTACT';
  position: absolute;
  bottom: -30px;
  left: 50%;
  transform: translateX(-50%);
  font-size: clamp(6rem, 18vw, 16rem);
  font-weight: 900;
  color: rgba(0,0,0,0.04);
  white-space: nowrap;
  letter-spacing: 0.05em;
}
.contact-cta .section-label { color: var(--black); opacity: 0.5; }
.contact-cta .section-title {
  font-size: clamp(2rem, 4vw, 3rem);
  margin-bottom: 16px;
}
.contact-cta p {
  font-size: 0.9rem;
  color: rgba(0,0,0,0.6);
  margin-bottom: 48px;
}
.contact-btn {
  display: inline-flex;
  align-items: center;
  gap: 16px;
  padding: 20px 56px;
  background: var(--black);
  color: var(--white);
  font-size: 0.85rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  transition: all 0.4s ease;
  position: relative;
}
.contact-btn:hover {
  transform: translateY(-4px);
  box-shadow: 0 20px 40px rgba(0,0,0,0.2);
}

/* ===== FOOTER ===== */
footer {
  background: var(--black);
  padding: 80px 48px 40px;
  border-top: 1px solid rgba(255,255,255,0.08);
}
.footer-inner {
  max-width: 1200px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1fr;
  gap: 60px;
  margin-bottom: 60px;
}
.footer-brand .logo { margin-bottom: 16px; }
.footer-brand p {
  font-size: 0.8rem;
  color: var(--gray-light);
  line-height: 1.8;
}
.footer-col h4 {
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--yellow);
  margin-bottom: 20px;
}
.footer-col a {
  display: block;
  font-size: 0.8rem;
  color: var(--gray-light);
  margin-bottom: 12px;
  transition: color 0.3s ease;
}
.footer-col a:hover { color: var(--white); }
.footer-bottom {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: 24px;
  border-top: 1px solid rgba(255,255,255,0.06);
}
.footer-copy {
  font-size: 0.7rem;
  color: var(--gray-light);
  letter-spacing: 0.05em;
}

/* ===== 下層ページ共通: ページヒーロー（STYLEGUIDE §3）===== */
.page-hero{position:relative;min-height:56vh;display:flex;align-items:center;background:var(--black);overflow:hidden;padding:140px 0 80px;}
/* 背景写真（番号付きスロット）: 全面に敷いて暗フィルタ */
.page-hero-bg{position:absolute;inset:0;z-index:0;filter:brightness(0.45) saturate(0.8);}
.page-hero-bg .photo-slot{min-height:0;border:none;border-radius:0;}
.page-hero::after{content:'';position:absolute;inset:0;z-index:1;background:linear-gradient(180deg,rgba(0,0,0,0.2) 0%,rgba(0,0,0,0.82) 100%);pointer-events:none;}
.page-hero .section-container{position:relative;z-index:2;}
.page-hero-label{font-size:0.75rem;font-weight:600;letter-spacing:0.3em;text-transform:uppercase;color:var(--yellow);margin-bottom:16px;}
.page-hero-title{font-size:clamp(2rem,4.5vw,3.6rem);font-weight:900;line-height:1.25;letter-spacing:-0.01em;color:var(--white);}
.page-hero-breadcrumb{margin-top:28px;font-size:0.72rem;letter-spacing:0.08em;color:var(--gray-light);}
.page-hero-breadcrumb a{color:var(--gray-light);}
.page-hero-breadcrumb a:hover{color:var(--yellow);}
/* 写真を使わないヒーロー用: うっすら動く黄グリッド背景（代表メッセージ・実績紹介） */
.page-hero .hero-bg-grid{position:absolute;inset:0;z-index:0;background-image:linear-gradient(rgba(255,214,0,0.04) 1px,transparent 1px),linear-gradient(90deg,rgba(255,214,0,0.04) 1px,transparent 1px);background-size:60px 60px;animation:gridMove 20s linear infinite;}
@keyframes gridMove{0%{transform:translate(0,0);}100%{transform:translate(60px,60px);}}

/* ===== 写真フレームパターン集（STYLEGUIDE §4 / 素の長方形は禁止）===== */
/* パターンA: スラッシュ（平行四辺形クリップ）— 主役写真・章扉ワイド写真。横長長方形にも使う */
.frame-slash{position:relative;clip-path:polygon(48px 0,100% 0,calc(100% - 48px) 100%,0 100%);overflow:hidden;background:var(--black);}
.frame-slash .photo-slot{min-height:0;border:none;border-radius:0;}
/* 横並び時は隣を -34px 重ねて幅14pxの平行スリットに（design-a Service参照）。768px以下は斜辺32px */
/* クリップ要素に影を付けたい時は box-shadow ではなくラッパーに filter:drop-shadow(...) を使う */

/* パターンB: 白マット＋影＋軽い傾き（ポラロイド風）— 人物・オフショット */
.frame-matte{background:#fff;padding:10px;box-shadow:0 18px 44px rgba(0,0,0,0.45);transform:rotate(-1.5deg);}
.frame-matte.alt{transform:rotate(1.8deg);}

/* パターンC: 黄オフセット面 — ポートレート・特写（A-21と同系。多用しない） */
.frame-offset{position:relative;}
.frame-offset::before{content:'';position:absolute;inset:0;background:var(--yellow);transform:translate(12px,12px);}
.frame-offset .photo-slot,.frame-offset img{position:relative;}

/* パターンD: 浮遊シャドウ＋黄コーナーブラケット — 記事サムネ・現場スナップ */
.frame-corner{position:relative;box-shadow:0 22px 48px rgba(0,0,0,0.4);}
.frame-corner::after{content:'';position:absolute;top:-8px;left:-8px;width:56px;height:56px;border-top:3px solid var(--yellow);border-left:3px solid var(--yellow);pointer-events:none;}

/* パターンE: 斜めノッチ（角を斜めに落とす）＋影 — カード内サムネ等 */
.frame-notch{position:relative;}
.frame-notch .clip{clip-path:polygon(0 0,100% 0,100% calc(100% - 36px),calc(100% - 36px) 100%,0 100%);overflow:hidden;}
.frame-notch{filter:drop-shadow(0 16px 32px rgba(0,0,0,0.35));}

/* ===== RESPONSIVE（共通部のみ。ページ固有の分岐は各テンプレートに残す）===== */
@media (max-width: 1024px) {
  .footer-inner { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 768px) {
  header { padding: 16px 24px; }
  .hamburger { display: flex; }
  /* ロゴとボタンはオーバーレイより前面に置く */
  .logo { position: relative; z-index: 1001; }

  /* ナビは全画面オーバーレイ。閉じている間は visibility:hidden で触れない状態にする
     （display:none だと開閉のアニメーションが効かないため） */
  nav {
    display: flex;
    position: fixed;
    inset: 0;
    z-index: 1000;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 26px;
    padding: 96px 24px 56px;
    background: var(--black);
    overflow-y: auto;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: opacity 0.35s ease, transform 0.35s ease, visibility 0.35s ease;
  }
  body.nav-open nav {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
  }
  nav a { font-size: 1rem; letter-spacing: 0.2em; }
  .nav-contact { margin-top: 10px; padding: 14px 44px; font-size: 0.85rem; }
  section { padding: 80px 0; }
  .section-container { padding: 0 24px; }
  .footer-inner { grid-template-columns: 1fr; gap: 32px; }
  .footer-bottom { flex-direction: column; gap: 16px; text-align: center; }
}