/* ==========================================================
   COSMOS — Dark Immersive Theme for Yosuke Takaoka Gallery
   Replaces renewal.css
   ========================================================== */

/* --- CSS Custom Properties --- */
:root {
  --bg-dark: #0a0a0f;
  --bg-dark-alt: #12121a;
  --bg-card: rgba(255,255,255,0.04);
  --accent-gold: #c9a84c;
  --accent-glow: #e8d59e;
  --accent-dim: rgba(201,168,76,0.3);
  --text-primary: #e8e8ec;
  --text-secondary: #8888a0;
  --glass: rgba(255,255,255,0.05);
  --glass-strong: rgba(255,255,255,0.08);
  --glass-border: rgba(255,255,255,0.1);
  --font-display: "Noto Serif JP", "Georgia", serif;
  --font-body: "Noto Sans JP", "Helvetica Neue", Arial, sans-serif;
  --transition: 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
  --glow-gold: 0 0 20px rgba(201,168,76,0.3);
  --glow-gold-strong: 0 0 40px rgba(201,168,76,0.4);
}

/* --- Base --- */
html {
  background-color: var(--bg-dark);
  overflow-x: hidden;
}
body {
  font-family: var(--font-body) !important;
  color: var(--text-primary);
  background-color: transparent;
  overflow-x: hidden;
  position: relative;
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-display) !important;
  color: var(--text-primary);
}

a {
  color: var(--accent-gold);
  transition: color var(--transition);
}
a:hover {
  color: var(--accent-glow);
  text-shadow: var(--glow-gold);
}

::selection {
  background: rgba(201,168,76,0.4);
  color: var(--text-primary);
}

/* --- Scroll Animations --- */
.fade-in {
  opacity: 0;
  transform: translateY(40px);
  transition: opacity 0.8s ease, transform 0.8s ease;
}
.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}
.fade-in-left {
  opacity: 0;
  transform: translateX(-40px);
  transition: opacity 0.8s ease, transform 0.8s ease;
}
.fade-in-left.visible {
  opacity: 1;
  transform: translateX(0);
}
.fade-in-right {
  opacity: 0;
  transform: translateX(40px);
  transition: opacity 0.8s ease, transform 0.8s ease;
}
.fade-in-right.visible {
  opacity: 1;
  transform: translateX(0);
}

/* --- Navigation (Glass) --- */
#mainNav {
  background-color: transparent !important;
  transition: all var(--transition);
  padding: 1.5rem 0;
  border-bottom: none !important;
  max-width: 100vw;
}
#mainNav.navbar-shrink {
  background-color: rgba(10, 10, 15, 0.85) !important;
  padding: 0.8rem 0;
  box-shadow: 0 2px 30px rgba(0,0,0,0.3);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--glass-border) !important;
}
#mainNav .navbar-brand img {
  height: 40px;
  transition: height var(--transition);
}
#mainNav.navbar-shrink .navbar-brand img {
  height: 30px;
}
#mainNav .navbar-nav .nav-link {
  font-family: var(--font-display) !important;
  font-size: 0.9rem;
  letter-spacing: 0.1em;
  padding: 0.5rem 1rem !important;
  position: relative;
  color: rgba(255,255,255,0.8) !important;
}
#mainNav .navbar-nav .nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  width: 0;
  height: 2px;
  background: var(--accent-gold);
  transition: all var(--transition);
  transform: translateX(-50%);
  box-shadow: var(--glow-gold);
}
#mainNav .navbar-nav .nav-link:hover::after,
#mainNav .navbar-nav .nav-link.active::after {
  width: 60%;
}
#mainNav .navbar-nav .nav-link:hover {
  color: var(--accent-glow) !important;
}

/* --- Masthead / Hero with Slideshow --- */
header.masthead {
  background: transparent;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  padding: 0 !important;
  overflow: hidden;
}
.hero-slideshow {
  position: absolute;
  inset: 0;
  z-index: 0;
}
.hero-slide {
  position: absolute;
  inset: 0;
  background-size: cover;
  background-position: center;
  opacity: 0;
  animation: heroSlide 24s infinite;
}
.hero-slide:first-child { opacity: 1; }
.hero-slide:nth-child(2) { animation-delay: 6s; }
.hero-slide:nth-child(3) { animation-delay: 12s; }
.hero-slide:nth-child(4) { animation-delay: 18s; }
@keyframes heroSlide {
  0%   { opacity: 0; }
  4%   { opacity: 1; }
  25%  { opacity: 1; }
  29%  { opacity: 0; }
  100% { opacity: 0; }
}
.hero-overlay {
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at center, rgba(10,10,15,0.35) 0%, rgba(10,10,15,0.8) 100%);
  z-index: 1;
}
header.masthead .container {
  position: relative;
  z-index: 2;
}
header.masthead .masthead-heading {
  font-family: var(--font-display) !important;
  font-size: 3.5rem !important;
  font-weight: 400 !important;
  letter-spacing: 0.2em;
  color: var(--text-primary);
  text-shadow: 0 0 60px rgba(201,168,76,0.2);
  animation: heroFadeIn 2s ease forwards;
}
header.masthead .masthead-subheading {
  font-family: var(--font-display) !important;
  font-size: 1.2rem;
  color: #ffffff;
  letter-spacing: 0.4em;
  animation: heroFadeIn 2s ease 0.5s forwards;
  opacity: 0;
  text-shadow: 0 1px 4px rgba(0,0,0,0.6);
}

/* Scroll indicator */
.scroll-indicator {
  position: absolute;
  bottom: 3rem;
  left: 50%;
  transform: translateX(-50%);
  z-index: 2;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.3rem;
}
.scroll-indicator span {
  font-family: var(--font-display);
  font-size: 0.7rem;
  color: var(--accent-gold);
  letter-spacing: 0.3em;
  text-transform: uppercase;
  animation: scrollFade 2.5s ease-in-out infinite;
}
.scroll-indicator i {
  color: var(--accent-gold);
  font-size: 1.8rem;
  animation: scrollArrow 2.5s ease-in-out infinite;
}

@keyframes heroFadeIn {
  from { opacity: 0; transform: translateY(30px); }
  to   { opacity: 1; transform: translateY(0); }
}
@keyframes scrollFade {
  0%, 100% { opacity: 0.3; }
  50%      { opacity: 1; }
}
@keyframes scrollArrow {
  0%   { transform: translateY(0); opacity: 0; }
  30%  { opacity: 1; }
  70%  { opacity: 1; }
  100% { transform: translateY(18px); opacity: 0; }
}

/* --- Section Common --- */
.page-section {
  padding: 7rem 0 !important;
  position: relative;
  z-index: 1;
  background-color: rgba(10, 10, 15, 0.88);
  overflow: hidden;
}
.page-section.bg-light {
  background-color: rgba(18, 18, 26, 0.85) !important;
}
.section-heading {
  font-family: var(--font-display) !important;
  font-size: 2.4rem !important;
  font-weight: 500 !important;
  color: var(--text-primary) !important;
  letter-spacing: 0.08em;
  position: relative;
  display: inline-block;
}
.section-heading::after {
  content: '';
  display: block;
  width: 50px;
  height: 3px;
  background: var(--accent-gold);
  margin: 1rem auto 0;
  border-radius: 2px;
  box-shadow: var(--glow-gold);
}
.section-subheading {
  font-family: var(--font-body) !important;
  font-size: 0.95rem !important;
  color: var(--text-secondary) !important;
  letter-spacing: 0.15em;
  margin-top: 0.5rem;
}

/* --- Artist Intro --- */
.artist-intro {
  max-width: 820px;
  margin: 0 auto 3rem;
}
.artist-intro .artist-photo {
  width: 200px;
  height: 200px;
  object-fit: cover;
  object-position: center 15%;
  border-radius: 50%;
  box-shadow: 0 0 30px rgba(201,168,76,0.3), 0 8px 30px rgba(0,0,0,0.3);
  border: 3px solid var(--accent-dim);
  transition: transform var(--transition), box-shadow var(--transition);
}
.artist-intro .artist-photo:hover {
  transform: scale(1.05);
  box-shadow: var(--glow-gold-strong), 0 8px 30px rgba(0,0,0,0.3);
}
.artist-intro .artist-text {
  font-size: 1rem;
  line-height: 2;
  color: var(--text-primary);
}
.artist-video {
  max-width: 720px;
  margin: 0 auto 4rem;
  background: var(--glass);
  border: 1px solid var(--glass-border);
  border-radius: 16px;
  padding: 1.5rem;
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
}

/* --- Portfolio Grid --- */
.gallery-scroll {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
  padding: 2rem 0;
  max-width: 960px;
  margin: 0 auto;
}
.gallery-scroll .portfolio-item {
  border-radius: 12px;
  overflow: hidden;
  background: var(--glass);
  border: 1px solid var(--glass-border);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  transition: all var(--transition);
}
.gallery-scroll .portfolio-item:hover {
  transform: translateY(-8px);
  box-shadow: var(--glow-gold-strong);
  border-color: var(--accent-dim);
}
.portfolio-item .portfolio-link {
  display: block;
  overflow: hidden;
}
.portfolio-item .portfolio-link img {
  transition: transform 0.6s ease;
  width: 100%;
}
.portfolio-item:hover .portfolio-link img {
  transform: scale(1.08);
}
/* Portfolio title overlay (replaces modals) */
.portfolio-item {
  position: relative;
}
.portfolio-title-overlay {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  padding: 2rem 1.2rem 1.2rem;
  background: linear-gradient(transparent, rgba(10,10,15,0.85));
  transition: all var(--transition);
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
}
.portfolio-title-overlay h5 {
  font-family: var(--font-display) !important;
  font-size: 1.1rem;
  color: var(--text-primary);
  font-weight: 500;
  margin: 0;
}
.portfolio-title-overlay .portfolio-sub {
  font-size: 0.8rem;
  color: var(--accent-gold);
  letter-spacing: 0.05em;
}
.portfolio-title-overlay .portfolio-arrow {
  opacity: 0;
  color: var(--accent-gold);
  font-size: 0.85rem;
  margin-top: 0.3rem;
  transition: opacity var(--transition), transform var(--transition);
  transform: translateX(-8px);
}
.portfolio-item:hover .portfolio-title-overlay {
  background: linear-gradient(transparent 10%, rgba(10,10,15,0.92));
}
.portfolio-item:hover .portfolio-title-overlay .portfolio-arrow {
  opacity: 1;
  transform: translateX(0);
}

/* --- Timeline (Profile) --- */
#about {
  background: rgba(10, 10, 15, 0.88);
  overflow: hidden;
}
.timeline::before {
  background-color: var(--accent-gold) !important;
  width: 2px !important;
  box-shadow: var(--glow-gold);
}
.timeline > li .timeline-image {
  background-color: var(--bg-dark-alt) !important;
  border: 3px solid var(--accent-gold) !important;
  box-shadow: var(--glow-gold);
  z-index: 1;
}
.timeline > li .timeline-image img {
  border-radius: 50%;
}
.timeline > li .timeline-panel {
  background: var(--glass);
  border-radius: 12px;
  border: 1px solid var(--glass-border) !important;
  box-shadow: 0 2px 15px rgba(0,0,0,0.2);
  padding: 1.5rem;
  transition: all var(--transition);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
}
.timeline > li .timeline-panel:hover {
  box-shadow: var(--glow-gold), 0 6px 25px rgba(0,0,0,0.2);
  transform: translateY(-3px);
  border-color: var(--accent-dim) !important;
}
.timeline > li .timeline-panel::before,
.timeline > li .timeline-panel::after {
  border-right-color: rgba(255,255,255,0.05) !important;
}
.timeline > li.timeline-inverted .timeline-panel::before,
.timeline > li.timeline-inverted .timeline-panel::after {
  border-left-color: rgba(255,255,255,0.05) !important;
}
.timeline > li .timeline-heading h4 {
  color: var(--text-primary);
  font-family: var(--font-display) !important;
  font-weight: 500;
}
.timeline > li .timeline-heading .subheading {
  color: var(--accent-gold) !important;
  font-family: var(--font-display) !important;
  font-size: 1rem;
}
.timeline > li .timeline-body p {
  font-size: 0.9rem;
  line-height: 1.8;
  color: var(--text-secondary);
}
.timeline > li .timeline-body p .text-muted {
  color: var(--text-secondary) !important;
}
.timeline > li:last-child .timeline-image {
  background: var(--accent-gold) !important;
}
.timeline > li:last-child .timeline-image h4 {
  color: var(--bg-dark) !important;
  font-family: var(--font-display) !important;
  font-size: 0.85rem !important;
  line-height: 1.5;
}

/* --- Archive Section (Glass Cards) --- */
#archive {
  background: rgba(18, 18, 26, 0.85) !important;
}
.archive-card {
  display: block;
  background: var(--glass);
  border: 1px solid var(--glass-border);
  border-radius: 12px;
  padding: 2rem 1.5rem;
  text-align: center;
  text-decoration: none;
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  transition: all var(--transition);
  height: 100%;
}
.archive-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--glow-gold-strong);
  border-color: var(--accent-dim);
  text-decoration: none;
}
.archive-card .archive-icon {
  width: 56px;
  height: 56px;
  margin: 0 auto 1rem;
  background: var(--glass-strong);
  border: 1px solid var(--glass-border);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition);
}
.archive-card:hover .archive-icon {
  background: var(--accent-gold);
  border-color: var(--accent-gold);
  box-shadow: var(--glow-gold);
}
.archive-card .archive-icon i {
  color: var(--accent-gold);
  font-size: 1.2rem;
  transition: color var(--transition);
}
.archive-card:hover .archive-icon i {
  color: var(--bg-dark);
}
.archive-card h5 {
  font-family: var(--font-display) !important;
  color: var(--text-primary);
  font-size: 1rem;
  font-weight: 500;
  margin-bottom: 0.5rem;
}
.archive-card p {
  color: var(--text-secondary);
  font-size: 0.8rem;
  margin-bottom: 0;
  line-height: 1.5;
}
.btn-archive-all {
  display: inline-flex;
  align-items: center;
  background: transparent;
  color: var(--accent-gold);
  border: 1px solid var(--accent-gold);
  padding: 0.7rem 1.8rem;
  border-radius: 30px;
  text-decoration: none;
  font-size: 0.9rem;
  font-family: var(--font-display);
  letter-spacing: 0.05em;
  transition: all var(--transition);
}
.btn-archive-all:hover {
  background: var(--accent-gold);
  color: var(--bg-dark);
  transform: translateY(-2px);
  box-shadow: var(--glow-gold-strong);
  text-decoration: none;
}

/* --- Archive Group Headings --- */
.archive-group {
  margin-bottom: 3rem;
}
.archive-group-heading {
  font-family: var(--font-display);
  font-size: 1.1rem;
  font-weight: 500;
  color: var(--accent-gold);
  letter-spacing: 0.1em;
  border-bottom: 1px solid var(--accent-dim);
  padding-bottom: 0.8rem;
  margin-bottom: 1.5rem;
}
.archive-group-heading i {
  margin-right: 0.4em;
}

/* --- Connect Section (SNS + Contact) --- */
#connect {
  background: rgba(18, 18, 26, 0.85) !important;
}
.connect-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
  max-width: 960px;
  margin: 0 auto 3rem;
}
.connect-card {
  text-align: center;
  padding: 2rem 1.5rem;
  background: var(--glass);
  border: 1px solid var(--glass-border);
  border-radius: 16px;
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  display: flex;
  flex-direction: column;
  align-items: center;
}
.connect-card-heading {
  font-family: var(--font-display);
  font-size: 1.2rem;
  font-weight: 500;
  color: var(--text-primary);
  margin-bottom: 1rem;
}
.connect-card-heading i {
  margin-right: 0.3em;
}
.connect-card-desc {
  color: var(--text-secondary);
  font-size: 0.9rem;
  margin-bottom: 1.2rem;
  flex-grow: 1;
}
.connect-card .btn {
  margin-top: auto;
}
.sns-bar {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 2.5rem;
  flex-wrap: wrap;
}
.sns-bar a {
  transition: all var(--transition);
}
.sns-bar a:hover {
  transform: scale(1.15);
}
.img-brand {
  max-height: 50px !important;
  opacity: 0.85;
  transition: all var(--transition);
  filter: brightness(1.2);
}
.img-brand:hover {
  opacity: 1;
  filter: brightness(1.4);
}
@media (max-width: 767.98px) {
  .connect-grid {
    grid-template-columns: 1fr;
    gap: 1.5rem;
  }
}

/* --- Footer --- */
.footer {
  background: rgba(5, 5, 10, 0.85) !important;
  color: var(--text-secondary);
  padding: 2rem 0 !important;
  font-size: 0.85rem;
  letter-spacing: 0.1em;
  border-top: 1px solid var(--glass-border);
}

/* --- Back to Top Button --- */
.back-to-top-btn {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  width: 48px;
  height: 48px;
  background: var(--glass-strong);
  border: 1px solid var(--glass-border);
  color: var(--accent-gold);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  transform: translateY(20px);
  transition: all 0.4s ease;
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  z-index: 999;
}
.back-to-top-btn.visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}
.back-to-top-btn:hover {
  background: var(--accent-gold);
  color: var(--bg-dark);
  border-color: var(--accent-gold);
  transform: translateY(-3px);
  box-shadow: var(--glow-gold-strong);
}

/* --- Text Muted Override --- */
.text-muted {
  color: var(--text-secondary) !important;
}

/* --- Responsive --- */
@media (max-width: 991.98px) {
  header.masthead .masthead-heading {
    font-size: 2rem !important;
    letter-spacing: 0.12em;
  }
  .section-heading {
    font-size: 1.8rem !important;
  }
  .page-section {
    padding: 4rem 0 !important;
  }
  #mainNav {
    background-color: rgba(10, 10, 15, 0.95) !important;
  }
  .navbar-collapse {
    background: rgba(10, 10, 15, 0.95);
    border-radius: 0 0 12px 12px;
    border: 1px solid var(--glass-border);
    border-top: none;
    padding: 1rem;
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
  }
  .gallery-scroll {
    grid-template-columns: repeat(2, 1fr);
    gap: 1rem;
  }
}

@media (max-width: 575.98px) {
  header.masthead .masthead-heading {
    font-size: 1.5rem !important;
  }
  .timeline > li .timeline-panel {
    padding: 1rem 1rem 1rem 100px;
  }
  .gallery-scroll {
    grid-template-columns: repeat(2, 1fr);
    gap: 0.8rem;
  }
}

/* --- Lightbox Swipe Hint (mobile only) --- */
.swipe-hint {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 9999999;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  pointer-events: none;
  opacity: 0;
  animation: swipeHintFade 3s ease forwards;
}
.swipe-hint-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.8rem;
  background: rgba(0, 0, 0, 0.65);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border-radius: 16px;
  padding: 1.5rem 2.5rem;
}
.swipe-hint-icon {
  font-size: 2rem;
  color: rgba(255, 255, 255, 0.9);
  animation: swipeHandMove 1.2s ease-in-out 0.3s 2;
}
.swipe-hint-text {
  font-family: var(--font-body);
  font-size: 0.85rem;
  color: rgba(255, 255, 255, 0.85);
  letter-spacing: 0.08em;
}
@keyframes swipeHintFade {
  0%   { opacity: 0; }
  12%  { opacity: 1; }
  70%  { opacity: 1; }
  100% { opacity: 0; }
}
@keyframes swipeHandMove {
  0%   { transform: translateX(20px); }
  50%  { transform: translateX(-20px); }
  100% { transform: translateX(20px); }
}

/* --- YouTube Embed & Instagram Placeholder --- */
.youtube-embed-wrap {
  position: relative;
  width: 100%;
  padding-bottom: 56.25%;
  border-radius: 10px;
  overflow: hidden;
  margin-bottom: 1.2rem;
}
.youtube-embed-wrap iframe {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
}
.instagram-placeholder {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 1rem;
  padding: 3rem 1rem;
  width: 100%;
  background: rgba(255,255,255,0.03);
  border-radius: 10px;
  margin-bottom: 1.2rem;
  color: var(--text-secondary);
  flex-grow: 1;
}
.instagram-placeholder i {
  color: var(--accent-gold);
}
.instagram-placeholder p {
  margin: 0;
  font-size: 0.85rem;
}
/* --- Smooth scroll --- */
html {
  scroll-behavior: smooth;
}