/* ================================================
   夜凪舎 - Components
   共通コンポーネント（ヘッダー、フッター、ナビゲーション、ボタン等）
   ================================================ */

/* === Header === */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  padding: var(--space-4) 0;
  background-color: var(--color-navy-deep); /* 濃い紺色背景 */
  backdrop-filter: blur(5px);
  transition: background-color var(--duration-normal) var(--ease-out-quart);
  isolation: isolate; /* 混合モードのコンテキストを作成 */
}

.header.is-scrolled {
  background-color: var(--color-navy-deep);
  backdrop-filter: blur(10px);
}

.header__content {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.header__logo {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.header__logo-icon {
  height: 48px;
  width: auto;
  mix-blend-mode: screen; /* #000000背景を透過 */
  filter: brightness(1.15) contrast(1.15);
}

@media (min-width: 768px) {
  .header__logo-icon {
    height: 56px;
  }
}

.header__logo-text {
  font-family: var(--font-ja-display);
  font-size: var(--text-xl);
  font-weight: 500;
  color: #ffffff;
  letter-spacing: 0.05em;
}

@media (min-width: 768px) {
  .header__logo-text {
    font-size: var(--text-2xl);
  }
}

/* === Navigation === */
.nav {
  display: flex;
  align-items: center;
  gap: var(--space-6);
}

.nav__toggle {
  display: none;
  flex-direction: column;
  gap: 6px;
  width: 32px;
  height: 32px;
  padding: 4px;
  border: none;
  background: transparent;
  cursor: pointer;
}

.nav__toggle span {
  display: block;
  width: 100%;
  height: 2px;
  background-color: var(--color-cream);
  border-radius: 2px;
  transition: all var(--duration-normal) var(--ease-out-quart);
}

.nav__toggle.is-active span:nth-child(1) {
  transform: translateY(8px) rotate(45deg);
}

.nav__toggle.is-active span:nth-child(2) {
  opacity: 0;
}

.nav__toggle.is-active span:nth-child(3) {
  transform: translateY(-8px) rotate(-45deg);
}

.nav__menu {
  display: flex;
  gap: var(--space-8);
  list-style: none;
}

.nav__menu a {
  position: relative;
  font-size: var(--text-sm);
  font-weight: 500;
  letter-spacing: var(--tracking-wide);
  color: var(--color-text-primary);
  transition: color var(--duration-fast) var(--ease-out-quart);
}

.nav__menu a::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 1px;
  background-color: var(--color-gold);
  transition: width var(--duration-normal) var(--ease-out-expo);
}

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

.nav__menu a:hover::after {
  width: 100%;
}

/* モバイルナビゲーション */
@media (max-width: 768px) {
  .nav__toggle {
    display: flex;
  }

  .nav__menu {
    position: fixed;
    top: 80px;
    right: 0;
    flex-direction: column;
    gap: var(--space-4);
    width: 100%;
    max-width: 300px;
    padding: var(--space-8);
    background-color: var(--color-overlay);
    backdrop-filter: blur(10px);
    border-left: 1px solid var(--color-border);
    transform: translateX(100%);
    transition: transform var(--duration-normal) var(--ease-out-quart);
  }

  .nav__menu.is-open {
    transform: translateX(0);
  }
}

/* === Footer === */
.footer {
  padding: var(--space-24) 0 var(--space-8);
  background-color: var(--color-navy);
  border-top: 1px solid var(--color-border);
}

.footer__content {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-8);
  text-align: center;
}

.footer__logo {
  height: 48px;
}

.footer__logo img {
  height: 100%;
  width: auto;
  opacity: 0.7;
  mix-blend-mode: screen; /* 暗い背景を透過 */
  filter: brightness(1.05) contrast(1.05);
}

.footer__nav ul {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: var(--space-4) var(--space-6);
}

.footer__nav a {
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  transition: color var(--duration-fast) var(--ease-out-quart);
}

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

.footer__copyright {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  letter-spacing: var(--tracking-wide);
}

/* === Button === */
.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-6);
  font-family: var(--font-ja-body);
  font-size: var(--text-sm);
  font-weight: 500;
  letter-spacing: var(--tracking-wide);
  color: var(--color-navy-deep);
  background-color: var(--color-gold-dim);
  border: none;
  border-radius: 2px;
  cursor: pointer;
  transition:
    background-color var(--duration-fast) var(--ease-out-quart),
    color var(--duration-fast) var(--ease-out-quart),
    transform var(--duration-fast) var(--ease-out-quart);
}

.button:hover {
  background-color: var(--color-gold);
  color: var(--color-navy-deep);
  transform: translateY(-2px);
}

.button:active {
  transform: translateY(0);
}

.button--outline {
  background-color: transparent;
  border: 1px solid var(--color-gold-dim);
  color: var(--color-gold);
}

.button--outline:hover {
  background-color: var(--color-gold);
  border-color: var(--color-gold);
  color: var(--color-navy-deep);
}

/* === Link Component === */
.link {
  position: relative;
  display: inline-block;
  color: var(--color-wave-light);
}

.link::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0;
  height: 1px;
  background-color: var(--color-gold);
  transition: width var(--duration-normal) var(--ease-out-expo);
}

.link:hover {
  color: var(--color-gold);
}

.link:hover::after {
  width: 100%;
}

/* === Card === */
.card {
  padding: var(--space-8);
  background-color: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--color-border);
  border-radius: 4px;
  transition:
    background-color var(--duration-normal) var(--ease-out-quart),
    border-color var(--duration-normal) var(--ease-out-quart);
}

.card:hover {
  background-color: rgba(255, 255, 255, 0.05);
  border-color: rgba(255, 255, 255, 0.15);
}

.card__title {
  margin-bottom: var(--space-4);
  font-size: var(--text-xl);
  color: var(--color-cream);
}

.card__description {
  color: var(--color-text-secondary);
}

/* === Wave Separator === */
.wave-separator-wrapper {
  width: 100%;
  overflow: hidden;
}

.wave-separator {
  width: 100%;
  height: 60px;
  opacity: 0.6;
}

/* === Form Elements === */
.form-field {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  margin-bottom: var(--space-6);
}

.form-field label {
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-cream);
  letter-spacing: var(--tracking-wide);
}

.form-field input,
.form-field textarea,
.form-field select {
  padding: var(--space-3) var(--space-4);
  font-size: var(--text-base);
  color: var(--color-text-primary);
  background-color: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--color-border);
  border-radius: 2px;
  transition:
    border-color var(--duration-fast) var(--ease-out-quart),
    background-color var(--duration-fast) var(--ease-out-quart);
}

.form-field input:focus,
.form-field textarea:focus,
.form-field select:focus {
  outline: none;
  border-color: var(--color-gold);
  background-color: rgba(255, 255, 255, 0.08);
}

.form-field textarea {
  min-height: 150px;
  resize: vertical;
}

/* === Lightbox === */
.lightbox {
  position: fixed;
  inset: 0;
  z-index: 9999;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--duration-normal) var(--ease-out-quart),
              visibility var(--duration-normal) var(--ease-out-quart);
}

.lightbox.is-open {
  opacity: 1;
  visibility: visible;
}

.lightbox__overlay {
  position: absolute;
  inset: 0;
  background-color: rgba(10, 10, 30, 0.95);
  backdrop-filter: blur(10px);
}

.lightbox__content {
  position: relative;
  max-width: 90vw;
  max-height: 90vh;
  transform: scale(0.9);
  transition: transform var(--duration-normal) var(--ease-out-expo);
}

.lightbox.is-open .lightbox__content {
  transform: scale(1);
}

.lightbox__image {
  max-width: 90vw;
  max-height: 85vh;
  border-radius: 12px;
  box-shadow: 0 30px 100px rgba(0, 0, 0, 0.5);
  cursor: pointer;
}

.lightbox__close {
  position: absolute;
  top: -48px;
  right: 0;
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: transparent;
  border: none;
  color: var(--color-cream);
  cursor: pointer;
  opacity: 0.7;
  transition: opacity var(--duration-fast) var(--ease-out-quart),
              transform var(--duration-fast) var(--ease-out-quart);
}

.lightbox__close:hover {
  opacity: 1;
  transform: scale(1.1);
}