/* ==========================================================================
   LOOP -Quatre- サイト共通スタイル
   ========================================================================== */

:root {
  /* カラートークン */
  --color-bg: #0a0a0a;
  --color-bg-elevated: #151515;
  --color-bg-card: #1a1a1a;
  --color-border: #2b2b2b;
  --color-red: #b00000;
  --color-red-bright: #d81f1f;
  --color-gold: #d0a900;
  --color-white: #f5f5f5;
  --color-muted: #9a9a9a;
  --color-muted-dim: #6b6b6b;

  /* タイポグラフィ */
  --font-display: "Zen Kaku Gothic New", "Noto Sans JP", sans-serif;
  --font-body: "Noto Sans JP", sans-serif;
  --font-label: "Oswald", "Zen Kaku Gothic New", sans-serif;

  /* レイアウト */
  --content-max: 1080px;
  --space-1: 0.5rem;
  --space-2: 1rem;
  --space-3: 1.5rem;
  --space-4: 2.5rem;
  --space-5: 4rem;
  --space-6: 6rem;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
  * {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

body {
  margin: 0;
  background: var(--color-bg);
  color: var(--color-white);
  font-family: var(--font-body);
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
}

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

a {
  color: inherit;
}

h1,
h2,
h3,
h4 {
  font-family: var(--font-display);
  margin: 0;
  line-height: 1.35;
}

p {
  margin: 0;
}

ul {
  margin: 0;
  padding: 0;
  list-style: none;
}

button {
  font-family: inherit;
}

:focus-visible {
  outline: 3px solid var(--color-gold);
  outline-offset: 3px;
}

.visually-hidden {
  position: absolute;
  clip-path: inset(50%);
  overflow: hidden;
  width: 1px;
  height: 1px;
  margin: -1px;
  padding: 0;
  border: 0;
  white-space: nowrap;
}

/* ==========================================================================
   レイアウト共通
   ========================================================================== */

.wrap {
  max-width: var(--content-max);
  margin-inline: auto;
  padding-inline: 1.5rem;
}

.section {
  padding-block: var(--space-6);
}

.section--tight {
  padding-block: var(--space-5);
}

.section-head {
  margin-bottom: var(--space-4);
}

.eyebrow {
  display: inline-block;
  font-family: var(--font-label);
  font-size: 0.8rem;
  letter-spacing: 0.12em;
  color: var(--color-red-bright);
  margin-bottom: var(--space-1);
}

.section-title {
  font-size: clamp(1.6rem, 3.4vw, 2.2rem);
  font-weight: 700;
  color: var(--color-white);
}

.section-lead {
  margin-top: var(--space-2);
  color: var(--color-muted);
  max-width: 62ch;
  font-size: 1.02rem;
}

/* ==========================================================================
   ヘッダー / ナビ
   ========================================================================== */

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(10, 10, 10, 0.88);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--color-border);
}

.site-header__inner {
  max-width: var(--content-max);
  margin-inline: auto;
  padding: 0.9rem 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  text-decoration: none;
  font-family: var(--font-label);
  letter-spacing: 0.06em;
}

.brand img {
  height: 34px;
  width: auto;
  border-radius: 4px;
}

.brand span {
  font-size: 1.05rem;
  color: var(--color-white);
}

.nav-toggle {
  display: none;
  background: none;
  border: 1px solid var(--color-border);
  color: var(--color-white);
  border-radius: 6px;
  padding: 0.5rem 0.7rem;
  font-size: 1rem;
}

.site-nav {
  display: flex;
  gap: var(--space-4);
}

.site-nav a {
  text-decoration: none;
  font-size: 0.92rem;
  color: var(--color-muted);
  padding-block: 0.3rem;
  border-bottom: 2px solid transparent;
  transition: color 0.2s ease, border-color 0.2s ease;
}

.site-nav a:hover,
.site-nav a[aria-current="page"] {
  color: var(--color-white);
  border-color: var(--color-red);
}

@media (max-width: 720px) {
  .nav-toggle {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
  }
  .site-nav {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--color-bg-elevated);
    border-bottom: 1px solid var(--color-border);
    flex-direction: column;
    gap: 0;
    padding: 0.5rem 1.5rem 1rem;
    display: none;
  }
  .site-nav[data-open="true"] {
    display: flex;
  }
  .site-nav a {
    padding: 0.8rem 0;
    border-bottom: 1px solid var(--color-border);
  }
}

/* ==========================================================================
   ヒーロー(TOP)
   ========================================================================== */

.hero {
  position: relative;
  padding-block: var(--space-6) var(--space-5);
  text-align: center;
  overflow: hidden;
}

.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at 50% 0%, rgba(176, 0, 0, 0.22), transparent 60%);
  pointer-events: none;
}

.hero__logo {
  max-width: 320px;
  margin-inline: auto;
  border-radius: 8px;
}

.hero__tagline {
  margin-top: var(--space-3);
  font-size: clamp(1.3rem, 3.6vw, 1.9rem);
  font-weight: 700;
  color: var(--color-white);
}

.hero__desc {
  margin: var(--space-2) auto 0;
  max-width: 46ch;
  color: var(--color-muted);
}

.hero__cta {
  margin-top: var(--space-4);
  display: flex;
  gap: var(--space-2);
  justify-content: center;
  flex-wrap: wrap;
}

/* ==========================================================================
   ボタン
   ========================================================================== */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  padding: 0.85rem 1.6rem;
  border-radius: 4px;
  font-size: 0.95rem;
  font-weight: 700;
  text-decoration: none;
  border: 1px solid transparent;
  cursor: pointer;
  min-height: 48px;
  transition: background-color 0.2s ease, border-color 0.2s ease, transform 0.15s ease;
}

.btn:active {
  transform: translateY(1px);
}

.btn--primary {
  background: var(--color-red);
  color: var(--color-white);
}

.btn--primary:hover {
  background: var(--color-red-bright);
}

.btn--outline {
  background: transparent;
  border-color: var(--color-border);
  color: var(--color-white);
}

.btn--outline:hover {
  border-color: var(--color-gold);
  color: var(--color-gold);
}

/* ==========================================================================
   カード / グリッド
   ========================================================================== */

.grid {
  display: grid;
  gap: var(--space-3);
}

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

.grid--3 {
  grid-template-columns: repeat(3, 1fr);
}

@media (max-width: 760px) {
  .grid--2,
  .grid--3 {
    grid-template-columns: 1fr;
  }
}

.card {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: 8px;
  padding: var(--space-3);
}

.card__index {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: var(--color-red);
  color: var(--color-white);
  font-family: var(--font-label);
  font-size: 0.85rem;
  margin-bottom: var(--space-2);
}

.card h3 {
  font-size: 1.08rem;
  margin-bottom: 0.5rem;
}

.card p {
  color: var(--color-muted);
  font-size: 0.94rem;
}

/* 数字カード */
.stat-card {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: 8px;
  padding: var(--space-3);
}

.stat-card__num {
  font-family: var(--font-label);
  font-size: clamp(2rem, 5vw, 2.6rem);
  color: var(--color-red-bright);
  font-weight: 700;
}

.stat-card__label {
  margin-top: 0.3rem;
  color: var(--color-muted);
  font-size: 0.92rem;
}

/* ==========================================================================
   タイムライン(3年間の歩み)
   ========================================================================== */

.timeline-item {
  display: grid;
  grid-template-columns: 140px 1fr;
  gap: var(--space-3);
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: 8px;
  padding: var(--space-3);
  margin-bottom: var(--space-2);
}

.timeline-item__title {
  font-family: var(--font-label);
  color: var(--color-red-bright);
  font-size: 1.4rem;
}

.timeline-item__sub {
  color: var(--color-muted-dim);
  font-size: 0.85rem;
  margin-top: 0.2rem;
}

.timeline-item__meta {
  font-weight: 700;
  margin-bottom: 0.4rem;
}

.timeline-item__desc {
  color: var(--color-muted);
  font-size: 0.94rem;
}

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

/* ==========================================================================
   イベント詳細ブロック(ポートフォリオ)
   ========================================================================== */

.event-block {
  border: 1px solid var(--color-border);
  border-radius: 10px;
  overflow: hidden;
  margin-bottom: var(--space-4);
  background: var(--color-bg-elevated);
}

.event-block__head {
  padding: var(--space-3) var(--space-3) 0;
}

.event-block__meta {
  color: var(--color-red-bright);
  font-size: 0.9rem;
  margin-top: 0.3rem;
}

.event-block__body {
  display: grid;
  grid-template-columns: 1.1fr 1fr;
  gap: var(--space-3);
  padding: var(--space-3);
  align-items: center;
}

@media (max-width: 760px) {
  .event-block__body {
    grid-template-columns: 1fr;
  }
}

.event-table {
  width: 100%;
  border-collapse: collapse;
}

.event-table th,
.event-table td {
  text-align: left;
  padding: 0.6rem 0;
  border-bottom: 1px solid var(--color-border);
  font-size: 0.94rem;
}

.event-table th {
  color: var(--color-muted);
  font-weight: 400;
  width: 45%;
}

.event-table td {
  font-weight: 700;
}

.event-block__body--single {
  grid-template-columns: 1fr;
  max-width: 560px;
}

.event-block__photo img {
  border-radius: 8px;
  width: 100%;
  height: auto;
}

.event-block__note {
  padding: 0 var(--space-3) var(--space-3);
  color: var(--color-muted);
  font-size: 0.92rem;
}

/* ==========================================================================
   情報テーブル(運営体制・パートナー実績)
   ========================================================================== */

.info-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
}

.info-list__row {
  display: grid;
  grid-template-columns: 220px 1fr;
  gap: var(--space-3);
  padding: var(--space-2) 0;
  border-bottom: 1px solid var(--color-border);
}

.info-list__row dt {
  color: var(--color-gold);
  font-weight: 700;
}

.info-list__row dd {
  margin: 0;
  color: var(--color-muted);
}

@media (max-width: 640px) {
  .info-list__row {
    grid-template-columns: 1fr;
    gap: 0.3rem;
  }
}

/* ==========================================================================
   次回開催ストリップ
   ========================================================================== */

.next-strip {
  background: linear-gradient(135deg, rgba(176, 0, 0, 0.16), rgba(208, 169, 0, 0.08));
  border: 1px solid var(--color-border);
  border-radius: 10px;
  padding: var(--space-4);
  display: grid;
  grid-template-columns: 1fr auto;
  gap: var(--space-3);
  align-items: center;
}

@media (max-width: 640px) {
  .next-strip {
    grid-template-columns: 1fr;
    text-align: center;
  }
}

.next-strip__label {
  font-family: var(--font-label);
  color: var(--color-gold);
  font-size: 0.85rem;
  letter-spacing: 0.08em;
}

.next-strip__title {
  font-size: 1.4rem;
  margin-top: 0.3rem;
}

.next-strip__detail {
  margin-top: 0.4rem;
  color: var(--color-muted);
  font-size: 0.92rem;
}

/* ==========================================================================
   フォーム(問合せページ)
   ========================================================================== */

.form-field {
  margin-bottom: var(--space-3);
}

.form-field label {
  display: block;
  font-weight: 700;
  margin-bottom: 0.4rem;
  font-size: 0.95rem;
}

.form-field .required {
  color: var(--color-red-bright);
  font-weight: 400;
  font-size: 0.82rem;
  margin-left: 0.3rem;
}

.form-field .hint {
  display: block;
  color: var(--color-muted-dim);
  font-size: 0.82rem;
  margin-bottom: 0.4rem;
}

.form-field input,
.form-field select,
.form-field textarea {
  width: 100%;
  font-size: 1rem;
  padding: 0.75rem;
  min-height: 48px;
  border-radius: 6px;
  border: 1px solid var(--color-border);
  background: var(--color-bg-card);
  color: var(--color-white);
  box-sizing: border-box;
  font-family: inherit;
}

.form-field textarea {
  min-height: 140px;
  resize: vertical;
}

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

.form-field input:user-invalid,
.form-field select:user-invalid,
.form-field textarea:user-invalid {
  border-color: var(--color-red-bright);
  background-color: rgba(176, 0, 0, 0.08);
}

.form-field input:user-valid,
.form-field textarea:user-valid {
  border-color: #4a8a4a;
}

.error-msg {
  display: none;
  color: var(--color-red-bright);
  font-size: 0.85rem;
  margin-top: 0.4rem;
}

.form-field input:user-invalid ~ .error-msg,
.form-field select:user-invalid ~ .error-msg,
.form-field textarea:user-invalid ~ .error-msg {
  display: block;
}

.form-status {
  margin-top: var(--space-2);
  padding: var(--space-2);
  border-radius: 6px;
  font-size: 0.94rem;
  display: none;
}

.form-status[data-state="success"] {
  display: block;
  background: rgba(74, 138, 74, 0.14);
  border: 1px solid #4a8a4a;
  color: #cfe9cf;
}

.form-status[data-state="error"] {
  display: block;
  background: rgba(176, 0, 0, 0.1);
  border: 1px solid var(--color-red);
  color: #f3caca;
}

/* ==========================================================================
   フッター
   ========================================================================== */

.site-footer {
  border-top: 1px solid var(--color-border);
  padding-block: var(--space-4);
  margin-top: var(--space-5);
}

.site-footer__inner {
  max-width: var(--content-max);
  margin-inline: auto;
  padding-inline: 1.5rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--space-2);
  color: var(--color-muted-dim);
  font-size: 0.85rem;
}

.site-footer__links {
  display: flex;
  gap: var(--space-3);
}

.site-footer__links a {
  text-decoration: none;
  color: var(--color-muted);
}

.site-footer__links a:hover {
  color: var(--color-gold);
}