/* ========================================
style.css
======================================== */

/* =========================
root
========================= */

:root {
  --color-text: #222;
  --color-bg: #fff;
  --color-primary: #00379c;
  --color-primary-light: #1a4fad;
  --color-accent: #30e5da;
  --color-bg-light: #edf2f8;
  --color-footer-nav: #00547a;

  --font-base: "Noto Sans JP", system-ui, sans-serif;

  --layout-width: 1000px;
  --header-height: 80px;
  --header-height-scrolled: 50px;

  --space-xs: 10px;
  --space-sm: 20px;
  --space-md: 40px;
  --space-lg: 60px;

  --transition: 0.3s ease;
  --transition-fast: 150ms ease-out;
  --transition-normal: 220ms cubic-bezier(0.25, 0.1, 0.25, 1);
  --transition-slow: 380ms cubic-bezier(0.19, 1, 0.22, 1);
  --color-nav-hover: var(--color-primary-light);
  --z-header-overlay: 999;
}

/* =========================
base
========================= */

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: var(--header-height);
  overscroll-behavior-x: none;
}

/* マーキー操作中はiOSの画面バウンドを抑止 */
html.is-marquee-dragging,
html.is-marquee-dragging body {
  overflow: hidden;
  overscroll-behavior: none;
}

body {
  margin: 0;
  color: var(--color-text);
  background: var(--color-bg);
  font-family: var(--font-base);
  line-height: 1.7;
}

img {
  display: block;
  width: 100%;
  height: auto;
}

/* =========================
layout
========================= */

.l-inner {
  width: 100%;
  max-width: var(--layout-width);
  margin: 0 auto;
  padding-inline: 0;
}

@media (max-width: 768px) {
  .l-inner {
    padding-inline: 15px;
  }
}

/* アンカー移動時のヘッダー被り回避 */
[id] {
  scroll-margin-top: var(--header-height);
}

.l-section {
  padding-top: 60px;
}

/* =========================
component
========================= */

/* title */

.title {
  margin-bottom: 40px;
  text-align: center;
}

.title__main {
  display: block;
  font-size: 32px;
  font-weight: 700;
}

.title__sub {
  display: block;
  margin-top: 10px;
  font-size: 14px;
}

/* セクション見出し（プレースホルダー以外でも青を維持） */
.l-section .title__main,
.l-section .title__sub {
  color: var(--color-primary);
}

/* button */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 220px;
  min-height: 60px;
  padding: 10px 30px;

  color: #fff;
  background: #222;

  text-decoration: none;

  transition: var(--transition);
}

.btn:hover {
  opacity: 0.8;
}

/* =========================
reveal スクロールで現れる演出
========================= */

[data-reveal] {
  opacity: 0;
  transform: translateY(30px);
  transition:
    opacity 0.8s ease,
    transform 0.8s ease;
}

[data-reveal].is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* =========================
responsive
========================= */

@media (max-width: 767px) {
  .l-section {
    padding-top: 60px;
  }

  .l-section + .l-section {
    margin-top: 60px;
  }

  .title__main {
    font-size: 24px;
  }

  .btn {
    min-width: 100%;
    min-height: 56px;
  }
}

/* =========================
2column layout
========================= */

.l-2col {
  display: flex;
  align-items: center;
  gap: 40px;
}

.l-2col__item {
  flex: 1;
  min-width: 0;
}

/* reverse */

.l-2col--reverse {
  flex-direction: row-reverse;
}

/* responsive */

@media (max-width: 767px) {
  .l-2col {
    flex-direction: column;
    gap: 30px;
  }
}

/* =========================
card
========================= */

.card {
  background: #fff;
  border-radius: 10px;
  overflow: hidden;
}

.card__img img {
  display: block;
  width: 100%;
  height: auto;
}

.card__body {
  padding: 20px;
}

.card__title {
  margin-bottom: 10px;
  font-size: 20px;
  font-weight: 700;
  line-height: 1.4;
}

.card__text {
  font-size: 14px;
  line-height: 1.8;
}

/* =========================
cta
========================= */

.cta {
  padding-block: 80px;
  color: #fff;
  background: #222;
}

.cta__inner {
  max-width: 900px;
  margin: 0 auto;
  padding-inline: 20px;
  text-align: center;
}

.cta__title {
  margin-bottom: 20px;
  font-size: 32px;
  font-weight: 700;
  line-height: 1.4;
}

.cta__text {
  margin-bottom: 40px;
  font-size: 16px;
  line-height: 1.8;
}

.cta__btn {
  display: flex;
  justify-content: center;
}

/* responsive */

@media (max-width: 767px) {
  .cta {
    padding-block: 60px;
  }

  .cta__title {
    font-size: 24px;
  }
}

/* =========================
grid layout
========================= */

.l-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 30px;
}

/* 2column */

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

/* 4column */

.l-grid--4 {
  grid-template-columns: repeat(4, 1fr);
}

/* responsive */

@media (max-width: 767px) {
  .l-grid,
  .l-grid--2,
  .l-grid--4 {
    grid-template-columns: 1fr;
    gap: 20px;
  }
}

/* =========================
header
========================= */

.header {
  --header-top-offset: 35px;

  position: fixed;
  top: var(--header-top-offset);
  left: 0;
  z-index: 1000;

  width: 100%;

  background: transparent;

  transition:
    top 0.35s ease,
    background 0.35s ease,
    box-shadow 0.35s ease;
}

.header.is-scroll {
  --header-top-offset: 0;

  background: transparent;
  box-shadow: 0 2px 16px rgba(0, 55, 156, 0.08);
}

/* blurは疑似要素へ（fixed要素の包含ブロック化を防ぐ） */
.header.is-scroll::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 0;

  background: rgba(255, 255, 255, 0.7);
  backdrop-filter: blur(12px);

  pointer-events: none;
}

/* inner */

.header__inner {
  position: relative;
  z-index: 1;

  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;

  max-width: none;
  min-height: var(--header-height);
  margin: 0 auto;
  padding-inline: clamp(15px, 2vw, 40px);

  transition: min-height 0.35s ease;
}

.header.is-scroll .header__inner {
  min-height: var(--header-height-scrolled);
}

/* 右側ブロック（ナビ＋SNS） */
.header__right {
  display: flex;
  align-items: center;
  gap: 28px;
  margin-left: auto;
}

/* logo */

.header__logo {
  display: block;
  flex-shrink: 0;
  margin: 0;
  text-decoration: none;

  transition:
    opacity var(--transition),
    margin 0.35s ease;
}

.header__logo:hover {
  opacity: 0.85;
}

.header__logo img {
  display: block;
  width: 100%;
  max-width: 295px;
  height: auto;

  transition: max-width 0.35s ease;
}

.header.is-scroll .header__logo {
  margin: 10px 0;
}

.header.is-scroll .header__logo img {
  max-width: 180px;
}

@media (max-width: 767px) {
  .header {
    --header-top-offset: 0;
  }

  .header__logo img {
    max-width: min(220px, 58vw);
  }

  .header.is-scroll .header__logo img {
    max-width: min(180px, 48vw);
  }
}

/* nav */

.header__nav-list {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 36px;

  margin: 0;
  padding: 0;

  list-style: none;
}

.header__nav-link {
  position: relative;

  display: inline-block;

  padding-block: 4px;

  color: var(--color-primary);
  font-size: 16px;
  font-weight: 700;
  text-decoration: none;

  transition:
    transform 0.35s cubic-bezier(0.4, 0, 0.2, 1),
    opacity var(--transition),
    font-size 0.35s ease;
}

.header.is-scroll .header__nav-link {
  font-size: 14px;
}

.header__nav-link::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 50%;

  width: 100%;
  height: 2px;

  background: var(--color-accent);
  transform: translateX(-50%) scaleX(0);
  transform-origin: center;

  transition: transform 0.35s cubic-bezier(0.4, 0, 0.2, 1);
}

.header__nav-link:hover {
  transform: translateY(-1px);
}

.header__nav-link:hover::after,
.header__nav-link.is-active::after {
  transform: translateX(-50%) scaleX(1);
}

.header__nav-link.is-active {
  font-weight: 700;
}

@media (prefers-reduced-motion: reduce) {
  .header__nav-link:hover {
    transform: none;
  }

  .header__nav-link::after {
    transition: none;
  }
}

/* tools */

.header__tools {
  display: flex;
  align-items: center;
  gap: 16px;
  flex-shrink: 0;
}

.header__sns {
  display: flex;
  align-items: center;
  gap: 10px;

  margin: 0;
  padding: 0;

  list-style: none;
}

.header__sns-link {
  position: relative;
  display: block;
  overflow: hidden;
}

.header__sns-link::after {
  content: "";
  position: absolute;
  top: 0;
  left: -120%;
  z-index: 1;

  width: 60%;
  height: 100%;

  background: linear-gradient(105deg, transparent 0%, rgba(255, 255, 255, 0.1) 35%, rgba(255, 255, 255, 0.95) 50%, rgba(255, 255, 255, 0.1) 65%, transparent 100%);
  transform: skewX(-18deg);

  pointer-events: none;
}

.header__sns-link:hover::after {
  animation: header-sns-shine 0.65s ease;
}

@keyframes header-sns-shine {
  0% {
    left: -120%;
  }

  100% {
    left: 160%;
  }
}

@media (prefers-reduced-motion: reduce) {
  .header__sns-link:hover::after {
    animation: none;
  }
}

.header__sns-icon {
  display: block;
  width: 36px;
  height: auto;

  transition: width 0.35s ease;
}

.header.is-scroll .header__sns-icon {
  width: 28px;
}

/* 背景スクロール停止（T2T） */
.tt-body--no-scroll {
  overflow: hidden;
}

/* ハンバーガートグル（2本線 → X） */
.header__toggle {
  display: none;
  position: relative;
  flex-shrink: 0;
  width: 32px;
  height: 24px;
  padding: 0;
  border: none;
  background: none;
  color: var(--color-primary);
  cursor: pointer;
}

.header__toggle-bar {
  position: absolute;
  left: 0;
  right: 0;
  height: 2px;
  background-color: currentColor;
  border-radius: 999px;
  transition:
    transform var(--transition-normal),
    top var(--transition-normal),
    bottom var(--transition-normal),
    opacity var(--transition-fast);
}

.header__toggle-bar:first-child {
  top: 5px;
}

.header__toggle-bar:last-child {
  bottom: 5px;
}

.header--menu-open .header__toggle-bar:first-child {
  top: 50%;
  transform: translateY(-50%) rotate(45deg);
}

.header--menu-open .header__toggle-bar:last-child {
  bottom: 50%;
  transform: translateY(50%) rotate(-45deg);
}

/* モバイルオーバーレイ（デフォルト非表示） */
.header__nav--overlay {
  display: none;
  position: fixed;
  inset: 0;
  z-index: var(--z-header-overlay);
  align-items: stretch;
  justify-content: flex-end;
}

.header__nav--overlay-inner {
  position: relative;
  width: 100%;
  max-width: var(--layout-width);
  padding-inline: 20px;
  padding-top: 96px;
}

.header__nav--overlay .header__nav-list {
  flex-direction: column;
  align-items: flex-start;
  gap: 0;
}

.header__nav--overlay .header__nav-link {
  width: 100%;
  padding: 14px 4px;
  font-size: 16px;
  text-align: left;
}

.header__nav--overlay .header__nav-link::after {
  left: 0;
  bottom: 0;
  transform: scaleX(0);
  transform-origin: left;
}

/* モバイル（920px以下） */
@media (max-width: 920px) {
  .header__nav {
    display: none;
  }

  .header__toggle {
    display: inline-block;
  }

  .header__nav--overlay {
    display: flex;
    opacity: 0;
    pointer-events: none;
    background: rgba(0, 55, 156, 0);
    backdrop-filter: blur(0);
    transition:
      opacity var(--transition-normal),
      background var(--transition-normal),
      backdrop-filter var(--transition-normal);
  }

  .header__nav--overlay-inner {
    height: 100%;
    max-width: 300px;
    min-width: 240px;
    margin: 0;
    margin-left: auto;
    padding-inline: 24px;
    padding-top: calc(var(--header-height) + 20px);
    padding-bottom: 40px;
    background: rgba(255, 255, 255, 0.97);
    border-left: 1px solid rgba(0, 55, 156, 0.18);
    border-radius: 28px 0 0 28px;
    box-shadow:
      -8px 0 40px rgba(0, 55, 156, 0.14),
      0 24px 60px rgba(0, 0, 0, 0.18);
    transform: translateX(100%);
    transition: transform var(--transition-slow);
    overflow-y: auto;
  }

  .header__nav--overlay .header__nav-list {
    width: 100%;
    gap: 0;
  }

  .header__nav--overlay .header__nav-item {
    width: 100%;
    border-bottom: 1px solid rgba(0, 55, 156, 0.1);
  }

  .header__nav--overlay .header__nav-item:first-child {
    border-top: 1px solid rgba(0, 55, 156, 0.1);
  }

  .header__nav--overlay .header__nav-link {
    position: relative;
    display: flex;
    align-items: center;
    gap: 14px;
    padding: 18px 8px 18px 4px;
    font-size: 15px;
    font-weight: 500;
    letter-spacing: 0.08em;
    overflow: hidden;
    transition:
      color var(--transition-fast),
      background var(--transition-fast);
  }

  .header__nav--overlay .header__nav-link::before {
    content: "";
    flex-shrink: 0;
    width: 3px;
    height: 22px;
    border-radius: 999px;
    background: linear-gradient(to bottom, var(--color-primary), rgba(0, 55, 156, 0.3));
  }

  .header__nav--overlay .header__nav-link::after {
    content: "";
    position: absolute;
    inset: 0;
    width: auto;
    height: auto;
    background: linear-gradient(90deg, rgba(0, 55, 156, 0.08), transparent);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform var(--transition-normal);
  }

  .header__nav--overlay .header__nav-link:hover {
    color: var(--color-nav-hover);
  }

  .header__nav--overlay .header__nav-link:hover::after {
    width: auto;
    transform: scaleX(1);
  }

  .header__nav--overlay .header__nav-link[aria-current="page"] {
    color: var(--color-primary);
    font-weight: 700;
    background: linear-gradient(90deg, rgba(0, 55, 156, 0.12) 0%, transparent 80%);
  }

  .header__nav--overlay .header__nav-link[aria-current="page"]::before {
    width: 4px;
    height: 28px;
    background: var(--color-primary);
    box-shadow: 0 0 8px rgba(0, 55, 156, 0.35);
  }

  .header__nav--overlay.is-open {
    opacity: 1;
    pointer-events: auto;
    background: rgba(0, 55, 156, 0.22);
    backdrop-filter: blur(12px);
  }

  .header__nav--overlay.is-open .header__nav--overlay-inner {
    transform: translateX(0);
  }
}

/* =========================
footer
========================= */

.footer {
  padding-top: 0;
  padding-bottom: 40px;

  color: var(--color-footer-nav);
  background: var(--color-bg-light);
}

/* inner */

.footer__inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 28px;
}

/* logo */

.footer__logo-wrap {
  margin: 0;
  text-align: center;
}

.footer__logo {
  display: inline-block;
  text-decoration: none;
  transition: opacity var(--transition);
}

.footer__logo:hover {
  opacity: 0.85;
}

.footer__logo img {
  width: 160px;
  max-width: 50%;
  height: auto;
  margin-inline: auto;
}

/* nav */

.footer__nav-list {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 32px;

  margin: 0;
  padding: 0;

  list-style: none;
}

.footer__nav-link {
  color: var(--color-footer-nav);
  font-size: 16px;
  font-weight: 700;
  text-decoration: none;
  transition: opacity var(--transition);
}

.footer__nav-link:hover {
  opacity: 0.75;
}

/* info */

.footer__info {
  font-size: 14px;
  line-height: 1.8;
}

/* copyright */

.footer__copyright {
  margin: 0;
  font-size: 12px;
  font-weight: 700;
  text-align: center;
}

/* responsive */

@media (max-width: 767px) {
  .footer {
    padding-top: 0;
  }

  .footer__nav-list {
    flex-direction: row;
    flex-wrap: wrap;
    justify-content: center;
    gap: 10px 14px;
  }

  .footer__nav-link {
    font-size: 12px;
  }

  .footer {
    padding-bottom: 32px;
  }
}