/* ==========================================================================
   Open Gate NIIGATA 2026 — round.css
   各ラウンドLP専用の共通スタイル
   base.css / layout.css の後に読み込む。
   各ラウンドの style.css は --round-color のみ上書きする。
   ========================================================================== */

/* ---- ラウンドカラー変数（デフォルト値。各 style.css で上書き） ---- */
:root {
  --round-color: oklch(64% 0.22 28);
}

/* ================================================================
   HERO
   ================================================================ */
.opg-round-hero {
  position: relative;
  padding: clamp(100px, 14vw, 160px) var(--opg-gutter) clamp(64px, 8vw, 96px);
  text-align: center;
  background:
    radial-gradient(ellipse 70% 50% at 100% 100%,
      color-mix(in oklch, var(--round-color) 16%, transparent),
      transparent 60%),
    var(--opg-bg-soft);
  overflow: hidden;
}

/* ラウンドカラーの淡いグラデーション */
.opg-round-hero__accent {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 80% 55% at 50% -5%,
      color-mix(in oklch, var(--round-color) 28%, transparent) 0%,
      transparent 70%),
    radial-gradient(ellipse 40% 30% at 0% 0%,
      color-mix(in oklch, var(--round-color) 20%, transparent),
      transparent 60%);
  pointer-events: none;
}
.opg-round-hero::after {
  content: "";
  position: absolute;
  bottom: -100px;
  left: -100px;
  width: 320px;
  height: 320px;
  border-radius: 50%;
  background: var(--round-color);
  opacity: 0.06;
  filter: blur(50px);
  pointer-events: none;
}

.opg-round-hero__inner {
  position: relative;
  z-index: 1;
}

/* 「Open Gate NIIGATA 2026 予選会」バッジ */
.opg-round-hero__badge {
  display: inline-block;
  font-family: var(--opg-font-en);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: none;
  color: var(--round-color);
  background: color-mix(in oklch, var(--round-color) 10%, white);
  border: 1px solid color-mix(in oklch, var(--round-color) 28%, transparent);
  padding: 6px 16px;
  border-radius: var(--opg-radius-pill);
  margin-bottom: 20px;
}

.opg-round-hero__en {
  font-family: var(--opg-font-en);
  font-weight: 600;
  letter-spacing: 0.18em;
  font-size: 13px;
  color: var(--opg-text-mute);
  margin-bottom: 10px;
}

.opg-round-hero__title {
  font-size: clamp(36px, 7vw, 72px);
  font-weight: 900;
  line-height: 1.08;
  margin-bottom: 24px;
  letter-spacing: -0.02em;
}

.opg-round-hero__meta {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  flex-wrap: wrap;
  margin-bottom: 36px;
  font-family: var(--opg-font-en);
  font-size: clamp(14px, 2vw, 17px);
  font-weight: 600;
  color: var(--opg-ink-soft);
}

.opg-round-hero__sep {
  color: var(--round-color);
  font-size: 20px;
  line-height: 1;
}

/* ヒーロー内CTAボタン */
.opg-btn--round-cta {
  background: var(--opg-ink);
  color: #fff;
  padding: 15px 36px;
}
.opg-btn--round-cta:hover {
  background: color-mix(in oklch, var(--round-color) 80%, var(--opg-ink));
}

/* ================================================================
   ABOUT — このラウンドについて
   ================================================================ */
.opg-rl-about { background: #fff; }

.opg-rl-about__body { max-width: 700px; }

.opg-rl-about__body p {
  font-size: clamp(17px, 1.7vw, 19px);
  line-height: 2.0;
  color: var(--opg-ink-soft);
  margin-bottom: 18px;
}
.opg-rl-about__body strong {
  font-weight: 900;
  color: var(--opg-ink);
  background: linear-gradient(transparent 65%, color-mix(in oklch, var(--round-color) 28%, transparent) 65%);
  padding: 0 2px;
}

/* ================================================================
   OVERVIEW — 開催概要
   日時 / 会場を上段の2カラムヒーローカード、その他は下段の横並び
   ================================================================ */
.opg-rl-overview { background: var(--opg-paper); }

.opg-rl-ov {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

/* ---- 上段: ヒーローカード ---- */
.opg-rl-ov__hero {
  display: grid;
  grid-template-columns: 1.1fr 1fr;
  gap: 16px;
}
@media (max-width: 720px) {
  .opg-rl-ov__hero { grid-template-columns: 1fr; }
}

.opg-rl-ov__hero-card {
  position: relative;
  background: #fff;
  border: 1px solid var(--opg-border);
  border-radius: var(--opg-radius-lg);
  padding: clamp(28px, 4vw, 40px);
  overflow: hidden;
}

/* 左上にアクセントカラーのドット装飾 */
.opg-rl-ov__hero-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 6px;
  height: 80px;
  background: var(--round-color);
  border-radius: 0 6px 6px 0;
}

.opg-rl-ov__label {
  font-family: var(--opg-font-en);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--round-color);
  margin-bottom: 18px;
}

/* --- 日時カード --- */
.opg-rl-ov__date {
  font-family: var(--opg-font-en);
  font-size: clamp(40px, 6vw, 64px);
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1;
  color: var(--opg-ink);
  margin-bottom: 8px;
}
.opg-rl-ov__date-sep {
  color: var(--round-color);
  margin: 0 2px;
}
.opg-rl-ov__date-jp {
  font-size: var(--opg-text-base);
  font-weight: 700;
  color: var(--opg-ink-soft);
  margin-bottom: 18px;
}
.opg-rl-ov__time {
  display: flex;
  align-items: baseline;
  flex-wrap: wrap;
  gap: 8px 12px;
  padding-top: 18px;
  border-top: 1px solid var(--opg-border);
  font-family: var(--opg-font-en);
  font-size: 18px;
  font-weight: 600;
  color: var(--opg-ink);
}
.opg-rl-ov__time em {
  font-style: normal;
  font-size: 10px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--opg-text-mute);
  margin-right: 4px;
  font-weight: 700;
}
.opg-rl-ov__time-sep {
  color: var(--opg-border-strong);
  font-weight: 400;
}
.opg-rl-ov__time-end {
  flex-basis: 100%;
  font-size: 12px;
  color: var(--opg-text-mute);
  font-weight: 500;
  letter-spacing: 0;
}

/* --- 会場カード --- */
.opg-rl-ov__venue-name {
  font-size: clamp(20px, 2.6vw, 26px);
  font-weight: 800;
  line-height: 1.35;
  color: var(--opg-ink);
  margin-bottom: 12px;
  letter-spacing: -0.01em;
}
.opg-rl-ov__venue-addr {
  font-size: 13px;
  color: var(--opg-text-mute);
  margin-bottom: 20px;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--opg-border);
}
.opg-rl-ov__venue-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 13px;
  font-weight: 700;
  color: var(--opg-ink);
  text-decoration: underline;
  text-underline-offset: 4px;
  text-decoration-color: var(--round-color);
  text-decoration-thickness: 2px;
}
.opg-rl-ov__venue-link:hover { color: var(--round-color); }

/* ---- 下段: 横並びの追加情報 ---- */
.opg-rl-ov__list {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  margin: 0;
}
@media (max-width: 720px) {
  .opg-rl-ov__list { grid-template-columns: 1fr; }
}

.opg-rl-ov__list-item {
  background: #fff;
  border: 1px solid var(--opg-border);
  border-radius: var(--opg-radius-md);
  padding: 22px 24px;
}

.opg-rl-ov__list-item dt {
  font-size: 13px;
  font-weight: 800;
  color: var(--round-color);
  letter-spacing: 0.04em;
  margin-bottom: 12px;
  padding-bottom: 12px;
  border-bottom: 1px solid color-mix(in oklch, var(--round-color) 25%, var(--opg-border));
}

.opg-rl-ov__list-item dd {
  font-size: 15px;
  line-height: 1.85;
  color: var(--opg-ink-soft);
  margin: 0;
}
.opg-rl-ov__list-item dd strong {
  color: var(--opg-ink);
  font-weight: 800;
}
.opg-rl-ov__list-item small {
  display: block;
  font-size: 12.5px;
  color: var(--opg-text-mute);
  margin-top: 10px;
  line-height: 1.7;
}

/* ================================================================
   SCHEDULE — 応募から当日まで（縦タイムライン）
   ================================================================ */
.opg-rl-schedule { background: #fff; }

.opg-rl-timeline {
  position: relative;
  max-width: 720px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.opg-rl-tl-item {
  position: relative;
  display: grid;
  grid-template-columns: 64px 1fr;
  gap: 24px;
  padding-bottom: 32px;
}
.opg-rl-tl-item:last-child { padding-bottom: 0; }

/* 縦の接続線 */
.opg-rl-tl-item::before {
  content: "";
  position: absolute;
  left: 31px;
  top: 64px;
  bottom: 0;
  width: 2px;
  background: var(--opg-border);
}
.opg-rl-tl-item:last-child::before { display: none; }

.opg-rl-tl-marker {
  position: relative;
  width: 64px;
  height: 64px;
  border-radius: 50%;
  background: #fff;
  border: 2px solid var(--opg-border);
  display: grid;
  place-items: center;
  z-index: 1;
  transition: border-color 0.2s ease;
}

.opg-rl-tl-num {
  font-family: var(--opg-font-en);
  font-size: 18px;
  font-weight: 700;
  color: var(--opg-ink-soft);
  letter-spacing: -0.01em;
}

.opg-rl-tl-item--final .opg-rl-tl-marker {
  background: var(--round-color);
  border-color: var(--round-color);
  box-shadow: 0 8px 24px -6px color-mix(in oklch, var(--round-color) 60%, transparent);
}
.opg-rl-tl-item--final .opg-rl-tl-num { color: #fff; }

.opg-rl-tl-body {
  padding-top: 14px;
}

.opg-rl-tl-label {
  font-size: 19px;
  font-weight: 800;
  color: var(--opg-ink);
  margin-bottom: 6px;
  letter-spacing: -0.01em;
}

.opg-rl-tl-date {
  font-family: var(--opg-font-en);
  font-size: var(--opg-text-md);
  font-weight: 700;
  color: var(--round-color);
  letter-spacing: 0.01em;
}

.opg-rl-tl-note {
  margin-top: 12px;
  padding: 10px 16px;
  background: color-mix(in oklch, var(--round-color) 8%, var(--opg-paper));
  border-radius: var(--opg-radius-sm);
  font-size: var(--opg-text-sm);
  color: var(--opg-ink-soft);
  line-height: 1.7;
  display: inline-block;
}

/* ================================================================
   REQUIREMENTS — 応募資格
   ================================================================ */
.opg-rl-requirements { background: var(--opg-paper); }

.opg-rl-requirements__note {
  font-size: var(--opg-text-sm);
  color: var(--opg-text-mute);
  margin-bottom: 28px;
  padding: 12px 18px;
  background: color-mix(in oklch, var(--round-color) 6%, white);
  border-left: 3px solid var(--round-color);
  border-radius: 0 var(--opg-radius-sm) var(--opg-radius-sm) 0;
  line-height: 1.7;
}

.opg-rl-req-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}
@media (max-width: 680px) { .opg-rl-req-grid { grid-template-columns: 1fr; } }

.opg-rl-req-card {
  background: #fff;
  border: 1px solid var(--opg-border);
  border-radius: var(--opg-radius-md);
  padding: 28px 24px;
}
.opg-rl-req-card--brave   { border-top: 3px solid var(--round-color); }
.opg-rl-req-card--rainbow { border-top: 3px solid oklch(72% 0.18 350); }

.opg-rl-req-card__badge {
  font-family: var(--opg-font-en);
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.2em;
  color: var(--opg-text-mute);
  margin-bottom: 6px;
}

.opg-rl-req-card__title {
  font-size: 22px;
  font-weight: 900;
  margin-bottom: 18px;
  letter-spacing: -0.01em;
}

.opg-rl-req-card__list {
  list-style: disc;
  padding-left: 20px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.opg-rl-req-card__list li {
  font-size: var(--opg-text-base);
  line-height: 1.8;
  color: var(--opg-ink-soft);
}

/* ================================================================
   DIVISIONS — 部門・募集テーマ
   ================================================================ */
.opg-rl-divisions { background: #fff; }

.opg-rl-div-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}
@media (max-width: 680px) { .opg-rl-div-grid { grid-template-columns: 1fr; } }

.opg-rl-div-card {
  border: 1px solid var(--opg-border);
  border-radius: var(--opg-radius-md);
  padding: 28px 24px;
  background: var(--opg-paper);
}
.opg-rl-div-card--brave   { border-top: 3px solid var(--round-color); }
.opg-rl-div-card--rainbow { border-top: 3px solid oklch(72% 0.18 350); }

.opg-rl-div-card__badge {
  display: block;
  font-family: var(--opg-font-en);
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.2em;
  color: var(--opg-text-mute);
  margin-bottom: 8px;
}

.opg-rl-div-card h3 {
  font-size: 22px;
  font-weight: 900;
  margin-bottom: 16px;
  letter-spacing: -0.01em;
}

.opg-rl-div-card p {
  font-size: 15px;
  line-height: 1.9;
  color: var(--opg-ink-soft);
  margin-bottom: 18px;
}

.opg-rl-div-card ul {
  list-style: disc;
  padding-left: 20px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.opg-rl-div-card li {
  font-size: 14px;
  line-height: 1.75;
  color: var(--opg-ink-soft);
}

/* ================================================================
   JUDGES — 審査について
   ================================================================ */
.opg-rl-judges { background: var(--opg-paper); }

.opg-rl-judges__desc {
  font-size: 15px;
  line-height: 1.9;
  color: var(--opg-ink-soft);
  margin-bottom: 36px;
  max-width: 800px;
}

.opg-rl-judges__criteria-label {
  font-family: var(--opg-font-en);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--opg-text-mute);
  margin-bottom: 16px;
}

/* 2行3列 — 右下1マスは空く */
.opg-rl-criteria {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 12px;
  margin: 0;
}
@media (max-width: 800px) {
  .opg-rl-criteria { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 520px) {
  .opg-rl-criteria { grid-template-columns: 1fr; }
}

.opg-rl-criteria__item {
  display: flex;
  flex-direction: column;
  gap: 12px;
  background: #fff;
  border: 1px solid var(--opg-border);
  border-radius: var(--opg-radius-md);
  padding: 28px 32px;
  transition: border-color 0.2s ease, transform 0.2s ease;
}
.opg-rl-criteria__item:hover {
  border-color: color-mix(in oklch, var(--round-color) 45%, var(--opg-border));
  transform: translateY(-2px);
}

.opg-rl-criteria__num {
  font-family: var(--opg-font-en);
  font-size: 13px;
  font-weight: 700;
  color: var(--round-color);
  letter-spacing: 0.08em;
  line-height: 1;
}

.opg-rl-criteria__item dt {
  font-weight: 800;
  font-size: 18px;
  color: var(--opg-ink);
  margin-bottom: 6px;
  letter-spacing: -0.01em;
}

.opg-rl-criteria__item dd {
  font-size: 13px;
  line-height: 1.75;
  color: var(--opg-ink-soft);
  margin: 0;
}

@media (max-width: 520px) {
  .opg-rl-criteria__item { padding: 20px 22px; }
}

/* ================================================================
   AWARD — 表彰内容（華やかに）
   ================================================================ */
.opg-rl-award {
  position: relative;
  background:
    radial-gradient(ellipse 60% 50% at 100% 0%, color-mix(in oklch, var(--round-color) 18%, transparent), transparent 70%),
    radial-gradient(ellipse 50% 50% at 0% 100%, color-mix(in oklch, var(--round-color) 14%, transparent), transparent 70%),
    #fff;
  overflow: hidden;
}
.opg-rl-award::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg,
    var(--round-color) 0%,
    color-mix(in oklch, var(--round-color) 40%, oklch(85% 0.16 90)) 50%,
    var(--round-color) 100%);
}
.opg-rl-award::after {
  content: "★";
  position: absolute;
  top: 80px;
  right: 8%;
  font-size: 240px;
  line-height: 1;
  color: color-mix(in oklch, var(--round-color) 12%, transparent);
  pointer-events: none;
  font-family: var(--opg-font-en);
  font-weight: 700;
}

.opg-rl-award__lead {
  position: relative;
  font-size: clamp(15px, 1.7vw, 17px);
  line-height: 1.95;
  color: var(--opg-ink-soft);
  margin-bottom: 40px;
  max-width: 760px;
}
.opg-rl-award__lead strong {
  color: var(--opg-ink);
  font-weight: 900;
  background: linear-gradient(transparent 60%, color-mix(in oklch, var(--round-color) 32%, transparent) 60%);
  padding: 0 4px;
}

.opg-rl-award__grid {
  position: relative;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 28px;
}
@media (max-width: 600px) { .opg-rl-award__grid { grid-template-columns: 1fr; } }

.opg-rl-award__div {
  position: relative;
  background: #fff;
  border: 1px solid color-mix(in oklch, var(--round-color) 18%, var(--opg-border));
  border-radius: var(--opg-radius-lg);
  padding: 32px 28px;
  box-shadow:
    0 2px 6px rgba(10,10,20,0.04),
    0 30px 60px -30px color-mix(in oklch, var(--round-color) 50%, transparent);
  overflow: hidden;
}
.opg-rl-award__div::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 6px;
  background: linear-gradient(90deg,
    var(--round-color),
    color-mix(in oklch, var(--round-color) 40%, oklch(85% 0.16 90)));
}

.opg-rl-award__div-title {
  font-size: clamp(18px, 2vw, 22px);
  font-weight: 900;
  margin-bottom: 24px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--opg-border);
  letter-spacing: -0.01em;
}

.opg-rl-award__list {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.opg-rl-award__list li {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 14px 18px;
  background: color-mix(in oklch, var(--round-color) 5%, var(--opg-paper));
  border-radius: var(--opg-radius-md);
  transition: transform 0.2s ease, background 0.2s ease;
}
.opg-rl-award__list li:hover {
  transform: translateX(4px);
  background: color-mix(in oklch, var(--round-color) 10%, var(--opg-paper));
}

.opg-rl-award__list li:nth-child(1) .opg-rl-award__rank {
  background: linear-gradient(135deg,
    oklch(82% 0.16 85),
    oklch(72% 0.18 50));
  color: #fff;
  box-shadow: 0 6px 18px -6px oklch(72% 0.18 50 / 0.6);
}
.opg-rl-award__list li:nth-child(2) .opg-rl-award__rank {
  background: linear-gradient(135deg,
    oklch(82% 0.02 250),
    oklch(70% 0.02 250));
  color: #fff;
}
.opg-rl-award__list li:nth-child(3) .opg-rl-award__rank {
  background: linear-gradient(135deg,
    oklch(60% 0.1 50),
    oklch(50% 0.12 40));
  color: #fff;
}

.opg-rl-award__rank {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-family: var(--opg-font-en);
  font-size: 14px;
  font-weight: 900;
  letter-spacing: 0.04em;
  color: #fff;
  background: var(--round-color);
  border-radius: 50%;
  width: 44px;
  height: 44px;
  flex-shrink: 0;
  text-align: center;
  line-height: 1;
}

.opg-rl-award__prize {
  font-size: clamp(15px, 1.7vw, 17px);
  font-weight: 700;
  color: var(--opg-ink);
}

/* ================================================================
   APPLY — 応募方法
   ================================================================ */
.opg-rl-apply { background: var(--opg-ink); }

.opg-rl-apply__inner {
  text-align: center;
  padding: clamp(40px, 6vw, 72px) 0;
}

.opg-rl-apply__eyebrow {
  font-family: var(--opg-font-en);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: rgba(255,255,255,0.45);
  margin-bottom: 10px;
}

.opg-rl-apply__title {
  font-size: clamp(28px, 4.5vw, 52px);
  font-weight: 900;
  color: #fff;
  letter-spacing: -0.025em;
  margin-bottom: 18px;
}

.opg-rl-apply__desc {
  font-size: var(--opg-text-base);
  color: rgba(255,255,255,0.65);
  line-height: 1.8;
  max-width: 520px;
  margin: 0 auto 24px;
}

.opg-rl-apply__dates {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 28px;
  flex-wrap: wrap;
  font-family: var(--opg-font-en);
  font-size: var(--opg-text-sm);
  font-weight: 600;
  color: rgba(255,255,255,0.55);
  margin-bottom: 36px;
}

.opg-btn--round-apply {
  background: var(--round-color);
  color: #fff;
  padding: 18px 44px;
  font-size: 15px;
  box-shadow: 0 16px 48px -12px color-mix(in oklch, var(--round-color) 60%, transparent);
}

.opg-rl-apply__coming-soon {
  display: inline-block;
  font-size: 15px;
  color: rgba(255,255,255,0.55);
  border: 1px dashed rgba(255,255,255,0.25);
  border-radius: var(--opg-radius-md);
  padding: 20px 32px;
  line-height: 1.8;
}

/* ================================================================
   PRECAUTIONS — 注意事項（カテゴリラベル付き）
   ================================================================ */
.opg-rl-precautions { background: var(--opg-paper); }

.opg-rl-precautions__lead {
  font-size: var(--opg-text-base);
  color: var(--opg-ink-soft);
  margin-bottom: 24px;
  max-width: 860px;
  line-height: 1.85;
}

.opg-rl-precautions__list {
  list-style: disc;
  margin: 0;
  max-width: 860px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  background: #fff;
  border: 1px solid var(--opg-border);
  border-radius: var(--opg-radius-md);
  padding: 24px 24px 24px calc(24px + 1.4em);
}

.opg-rl-precautions__list li {
  font-size: var(--opg-text-base, 15px);
  line-height: 1.85;
  color: var(--opg-ink-soft);
}

.opg-rl-precautions__list li::marker {
  color: var(--round-color);
}

@media (max-width: 640px) {
  .opg-rl-precautions__list {
    padding: 18px 18px 18px calc(18px + 1.4em);
  }
}