/* ============================================
   Shanda AI Research Tokyo — Homepage Styles
   ============================================ */

:root {
  --dark-bg: #0a0a0a;
  --dark-bg-alt: #111113;
  --dark-bg-light: #1a1a1e;
  --dark-bg-card: #16161a;
  --dark-bg-hover: #222228;
  --dark-border: #2a2a2e;
  --dark-border-hover: #3274D8;
  --accent: #3274D8;
  --accent-light: #5a9af0;
  --text-primary: #f0f0f2;
  --text-secondary: #a0a0a8;
  --text-muted: #6a6a72;
  --gradient-1: #6E85DF;
  --gradient-2: #40A5EB;
  --gradient-3: #52BBB1;
}

/* ---- Reset & Base ---- */
html, body {
  background: var(--dark-bg);
  color: var(--text-primary);
}

body {
  font-family: 'Lato', -apple-system, BlinkMacSystemFont, sans-serif;
  -webkit-font-smoothing: antialiased;
}

::selection {
  background: var(--accent);
  color: #fff;
}

/* ---- Navbar ---- */
.navbar {
  background: rgba(10, 10, 10, 0.85);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--dark-border);
  min-height: 4.5rem;
}

.nav-logo-text {
  font-weight: 900;
  font-size: 1.4rem;
  color: var(--text-primary);
  letter-spacing: -0.02em;
}

.navbar-item {
  color: var(--text-secondary) !important;
  font-size: 1.05rem;
  font-weight: 400;
  transition: color 0.2s;
}

.navbar-item:hover {
  color: var(--text-primary) !important;
  background: transparent !important;
}

.navbar-burger {
  color: var(--text-primary);
}

.navbar-burger:hover {
  background: transparent;
  color: var(--accent);
}

.navbar-menu {
  background: transparent;
}

@media screen and (max-width: 1023px) {
  .navbar-menu {
    background: rgba(10, 10, 10, 0.97);
    padding: 0.5rem 0;
  }
  .navbar-menu.is-active {
    display: block;
  }
}

/* ---- Hero ---- */
.hero.is-fullheight-with-navbar {
  background: var(--dark-bg);
  min-height: calc(100vh - 4.5rem);
}

.hero-body {
  padding-top: 6rem;
  padding-bottom: 4rem;
}

.hero-label {
  font-size: 0.85rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 1rem;
}

.hero-title {
  font-size: 3rem;
  font-weight: 900;
  line-height: 1.15;
  color: var(--text-primary);
  margin-bottom: 1.5rem;
  letter-spacing: -0.02em;
}

@media screen and (max-width: 768px) {
  .hero-title {
    font-size: 2rem;
  }
}

.gradient-headline {
  background: linear-gradient(135deg, var(--gradient-1) 0%, var(--gradient-2) 50%, var(--gradient-3) 100%);
  background-clip: text;
  -webkit-background-clip: text;
  color: transparent;
  -webkit-text-fill-color: transparent;
  background-size: 200% 100%;
  animation: gradient-shift 6s ease-in-out infinite alternate;
}

@keyframes gradient-shift {
  from { background-position: 0% 50%; }
  to   { background-position: 100% 50%; }
}

.hero-subtitle {
  font-size: 1.4rem;
  line-height: 1.7;
  color: var(--text-secondary);
  max-width: 540px;
  margin-bottom: 2rem;
}

.hero-actions {
  display: flex;
  gap: 0.75rem;
  flex-wrap: wrap;
}

.hero-btn-outline {
  color: #fff !important;
  background: rgba(255, 255, 255, 0.15) !important;
  border-color: rgba(255, 255, 255, 0.4) !important;
}

.hero-btn-outline:hover {
  background: var(--accent) !important;
  border-color: var(--accent) !important;
  color: #fff !important;
}

.hero-visual {
  border-radius: 16px;
  overflow: hidden;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5);
}

.hero-visual video {
  display: block;
  width: 100%;
  height: auto;
}

/* ---- Sections ---- */
.section {
  background: var(--dark-bg);
  padding: 5rem 1.5rem;
}

.section-alt {
  background: var(--dark-bg-alt);
}

.section-heading {
  font-size: 2rem;
  font-weight: 900;
  color: var(--text-primary);
  margin-bottom: 0.5rem;
  letter-spacing: -0.02em;
}

.section-subheading {
  color: var(--text-secondary);
  font-size: 1.05rem;
  margin-bottom: 2.5rem;
}

/* ---- About ---- */
.about-content {
  margin-top: 1.5rem;
}

.about-content p {
  color: var(--text-secondary);
  font-size: 1.05rem;
  line-height: 1.8;
  margin-bottom: 1rem;
}

.about-content strong {
  color: var(--text-primary);
}

/* ---- News ---- */
.news-list {
  margin-top: 1.5rem;
}

.news-item {
  display: flex;
  align-items: baseline;
  gap: 0.75rem;
  padding: 1rem 0;
  border-bottom: 1px solid var(--dark-border);
  flex-wrap: wrap;
}

.news-item:last-child {
  border-bottom: none;
}

.news-date {
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--text-muted);
  white-space: nowrap;
  min-width: 5rem;
}

.news-badge {
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  padding: 0.15rem 0.5rem;
  border-radius: 3px;
  white-space: nowrap;
}

.badge-paper {
  background: rgba(50, 116, 216, 0.2);
  color: var(--accent-light);
}

.badge-release {
  background: rgba(82, 187, 177, 0.2);
  color: #52BBB1;
}

.badge-announcement {
  background: rgba(110, 133, 223, 0.2);
  color: #8C9AEF;
}

.news-text {
  color: var(--text-secondary);
  font-size: 0.95rem;
  line-height: 1.6;
}

.news-text a {
  color: var(--accent-light);
  text-decoration: none;
}

.news-text a:hover {
  text-decoration: underline;
}

/* ---- Research Tabs ---- */
.research-tabs {
  display: flex;
  gap: 0.5rem;
  margin-bottom: 2rem;
  flex-wrap: wrap;
}

.research-tab {
  background: var(--dark-bg-card);
  border: 1px solid var(--dark-border);
  border-radius: 8px;
  color: var(--text-secondary);
  font-size: 0.85rem;
  font-weight: 700;
  padding: 0.5rem 1.25rem;
  cursor: pointer;
  transition: all 0.2s;
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
}

.research-tab:hover {
  border-color: var(--accent);
  color: var(--text-primary);
}

.research-tab.is-active {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}

.research-tab i {
  font-size: 0.8rem;
}

/* ---- Category Badges ---- */
.project-cat-badge,
.pub-cat-badge {
  display: inline-block;
  font-size: 0.65rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  padding: 0.15rem 0.5rem;
  border-radius: 3px;
  background: rgba(50, 116, 216, 0.15);
  color: var(--accent-light);
  margin-left: 0.4rem;
  vertical-align: middle;
}

/* ---- Research / Projects ---- */
.project-featured {
  background: var(--dark-bg-card);
  border: 1px solid var(--dark-border);
  border-radius: 16px;
  padding: 2rem;
  margin-bottom: 2.5rem;
  transition: border-color 0.3s;
}

.project-featured:hover {
  border-color: var(--dark-border-hover);
}

.project-media {
  border-radius: 12px;
  overflow: hidden;
}

.project-media video,
.project-media img {
  display: block;
  width: 100%;
  height: auto;
}

.project-tag {
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--accent);
  margin-bottom: 0.5rem;
  display: inline-block;
}

.project-title {
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 0.5rem;
  line-height: 1.3;
}

.project-authors {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 0.75rem;
  line-height: 1.5;
}

.project-desc {
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 1rem;
}

.project-links {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.project-links .button.is-dark {
  background: var(--dark-bg-hover);
  border: 1px solid var(--dark-border);
  color: var(--text-primary);
  font-size: 0.8rem;
}

.project-links .button.is-dark:hover {
  border-color: var(--accent);
  color: var(--accent-light);
}

/* Small project cards */
.project-grid {
  margin-top: 1rem;
}

.project-card-small {
  background: var(--dark-bg-card);
  border: 1px solid var(--dark-border);
  border-radius: 12px;
  padding: 1.25rem;
  height: 100%;
  transition: border-color 0.3s, transform 0.2s;
}

.project-card-small:hover {
  border-color: var(--dark-border-hover);
  transform: translateY(-2px);
}

.project-media-small {
  border-radius: 8px;
  overflow: hidden;
  margin-bottom: 1rem;
  aspect-ratio: 16 / 9;
}

.project-media-small img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.placeholder-media {
  background: var(--dark-bg-hover);
  display: flex;
  align-items: center;
  justify-content: center;
}

.placeholder-media i {
  font-size: 2rem;
  color: var(--text-muted);
}

.project-title-small {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 0.5rem;
}

.project-desc-small {
  font-size: 0.875rem;
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: 1rem;
}

/* ---- Publications ---- */
.pub-list {
  margin-top: 1rem;
}

.pub-item {
  display: flex;
  gap: 1.5rem;
  padding: 1.25rem 0;
  border-bottom: 1px solid var(--dark-border);
}

.pub-item:last-child {
  border-bottom: none;
}

.pub-venue-year {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  min-width: 4.5rem;
  flex-shrink: 0;
}

.pub-year {
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--text-muted);
}

.pub-venue {
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--accent);
  margin-top: 0.15rem;
}

.pub-title {
  font-size: 1.05rem;
  font-weight: 700;
  margin-bottom: 0.25rem;
}

.pub-title a {
  color: var(--text-primary);
  text-decoration: none;
  transition: color 0.2s;
}

.pub-title a:hover {
  color: var(--accent-light);
}

.pub-authors {
  font-size: 0.85rem;
  color: var(--text-muted);
  line-height: 1.5;
  margin-bottom: 0.5rem;
}

.pub-links {
  display: flex;
  gap: 1rem;
}

.pub-links a {
  font-size: 0.8rem;
  color: var(--accent);
  text-decoration: none;
  transition: color 0.2s;
}

.pub-links a:hover {
  color: var(--accent-light);
  text-decoration: underline;
}

.pub-links a i {
  margin-right: 0.25rem;
}

/* ---- Blog ---- */
.blog-card {
  background: var(--dark-bg-card);
  border: 1px solid var(--dark-border);
  border-radius: 12px;
  overflow: hidden;
  height: 100%;
  transition: border-color 0.3s, transform 0.2s;
}

.blog-card:hover {
  border-color: var(--dark-border-hover);
  transform: translateY(-2px);
}

.blog-card-image {
  aspect-ratio: 16 / 9;
  overflow: hidden;
}

.blog-card-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.3s;
}

.blog-card:hover .blog-card-image img {
  transform: scale(1.03);
}

.blog-card-content {
  padding: 1.5rem;
}

.blog-date {
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.blog-title {
  font-size: 1.1rem;
  font-weight: 700;
  margin: 0.5rem 0;
  line-height: 1.4;
}

.blog-title a {
  color: var(--text-primary);
  text-decoration: none;
  transition: color 0.2s;
}

.blog-title a:hover {
  color: var(--accent-light);
}

.blog-excerpt {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: 1rem;
}

.blog-read-more {
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--accent);
  text-decoration: none;
  transition: color 0.2s;
}

.blog-read-more:hover {
  color: var(--accent-light);
}

/* ---- People ---- */
.people-grid {
  margin-top: 1rem;
}

.person-card {
  text-align: center;
  padding: 1rem 0.5rem;
}

.person-avatar {
  width: 64px;
  height: 64px;
  border-radius: 50%;
  background: var(--dark-bg-hover);
  border: 2px solid var(--dark-border);
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 0.5rem;
  transition: border-color 0.3s;
}

.person-avatar:hover {
  border-color: var(--accent);
}

.person-avatar i {
  font-size: 1.25rem;
  color: var(--text-muted);
}

.person-avatar a {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  height: 100%;
}

.person-avatar a i {
  color: var(--text-muted);
  transition: color 0.2s;
}

.person-avatar a:hover i {
  color: var(--accent);
}

.person-name {
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--text-secondary);
  line-height: 1.3;
}

.person-name a {
  color: var(--text-secondary);
  text-decoration: none;
  transition: color 0.2s;
}

.person-name a:hover {
  color: var(--accent-light);
}

.affiliations-note {
  text-align: center;
  margin-top: 2rem;
  color: var(--text-muted);
  font-size: 0.9rem;
}

.affiliations-note strong {
  color: var(--text-secondary);
}

/* ---- Footer ---- */
.footer {
  background: var(--dark-bg) !important;
  padding: 3rem 1.5rem 2rem;
  border-top: 1px solid var(--dark-border);
}

.footer-brand {
  font-size: 1.1rem;
  font-weight: 900;
  color: var(--text-primary);
  margin-bottom: 0.25rem;
}

.footer-tagline {
  font-size: 0.85rem;
  color: var(--text-muted);
}

.footer-org {
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-top: 0.5rem;
}

.footer-heading {
  font-size: 0.8rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-muted);
  margin-bottom: 0.75rem;
}

.footer-links {
  list-style: none;
  padding: 0;
  margin: 0;
}

.footer-links li {
  margin-bottom: 0.4rem;
}

.footer-links a {
  font-size: 0.9rem;
  color: var(--text-secondary);
  text-decoration: none;
  transition: color 0.2s;
}

.footer-links a:hover {
  color: var(--accent-light);
}

.footer-social {
  display: flex;
  gap: 1rem;
}

.footer-social a {
  font-size: 1.25rem;
  color: var(--text-secondary);
  transition: color 0.2s;
}

.footer-social a:hover {
  color: var(--accent-light);
}

.footer-bottom {
  margin-top: 2.5rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--dark-border);
}

.footer-bottom p {
  font-size: 0.8rem;
  color: var(--text-muted);
}

/* ---- Smooth scroll ---- */
html {
  scroll-behavior: smooth;
  scroll-padding-top: 4rem;
}

/* ---- Bulma overrides ---- */
.section.has-background-black .title,
.section.has-background-black .subtitle {
  color: inherit;
}

.tag.is-dark {
  background: var(--dark-bg-hover);
  color: var(--text-muted);
}

/* ---- Blog Overlay ---- */
.blog-overlay {
  display: none;
  position: fixed;
  inset: 0;
  z-index: 100;
  background: rgba(0, 0, 0, 0.8);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  overflow-y: auto;
  padding: 2rem;
}

.blog-overlay.is-active {
  display: flex;
  justify-content: center;
  align-items: flex-start;
}

.blog-overlay-content {
  background: var(--dark-bg-light);
  border: 1px solid var(--dark-border);
  border-radius: 16px;
  max-width: 720px;
  width: 100%;
  margin: 4rem auto;
  padding: 2.5rem;
  position: relative;
}

.blog-overlay-close {
  position: absolute;
  top: 1rem;
  right: 1.25rem;
  background: none;
  border: none;
  color: var(--text-muted);
  font-size: 1.75rem;
  cursor: pointer;
  line-height: 1;
  transition: color 0.2s;
}

.blog-overlay-close:hover {
  color: var(--text-primary);
}

.blog-overlay-title {
  font-size: 1.6rem;
  font-weight: 900;
  color: var(--text-primary);
  margin: 0.75rem 0 1.5rem;
  line-height: 1.3;
}

.blog-overlay-body {
  color: var(--text-secondary);
  font-size: 1rem;
  line-height: 1.8;
}

.blog-overlay-body p {
  margin-bottom: 1rem;
}

.blog-overlay-body strong {
  color: var(--text-primary);
}

.blog-overlay-body a {
  color: var(--accent-light);
  text-decoration: none;
}

.blog-overlay-body a:hover {
  text-decoration: underline;
}

/* ---- Person avatar image ---- */
.person-avatar img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: 50%;
}

/* ---- Responsive ---- */
@media screen and (max-width: 768px) {
  .hero-body {
    padding-top: 3rem;
    padding-bottom: 2rem;
  }

  .hero-visual {
    margin-top: 2rem;
  }

  .section {
    padding: 3rem 1rem;
  }

  .project-featured {
    padding: 1.25rem;
  }

  .project-featured .columns {
    display: flex;
    flex-direction: column;
  }

  .project-featured .project-media {
    margin-bottom: 1rem;
  }

  .pub-item {
    flex-direction: column;
    gap: 0.5rem;
  }

  .pub-venue-year {
    flex-direction: row;
    gap: 0.75rem;
    align-items: center;
  }

  .news-item {
    flex-direction: column;
    gap: 0.35rem;
  }

  .news-date {
    min-width: auto;
  }
}

/* ---- Logo ---- */
.nav-logo-img {
  height: 56px;
  width: auto;
}

.hero-logo {
  margin-bottom: 1.25rem;
}

.hero-logo img {
  height: 48px;
  width: auto;
}

/* ============================================
   Home Page — Full-bleed Hero
   ============================================ */

.home-hero {
  position: relative;
  overflow: hidden;
}

.home-hero-bg {
  position: absolute;
  inset: 0;
  z-index: 0;
}

.home-hero-bg img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
}

.home-hero-bg::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(
    to right,
    rgba(10, 10, 10, 0.92) 0%,
    rgba(10, 10, 10, 0.65) 45%,
    rgba(10, 10, 10, 0.15) 100%
  );
}

.home-hero .hero-body {
  position: relative;
  z-index: 1;
  display: flex;
  align-items: center;
  padding-top: 4rem;
  padding-bottom: 4rem;
}

.home-hero-inner {
  max-width: 680px;
}

.home-title {
  font-size: 4.2rem;
  font-weight: 900;
  line-height: 1.1;
  color: #fff;
  margin-bottom: 1.5rem;
  letter-spacing: -0.03em;
}

.home-subtitle {
  font-size: 1.35rem;
  line-height: 1.7;
  color: rgba(255, 255, 255, 0.72);
  margin-bottom: 2.5rem;
  max-width: 520px;
}

.home-cta {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}

.home-btn-primary {
  font-size: 1.1rem !important;
  font-weight: 700;
  padding: 0.85rem 2.2rem !important;
}

.home-btn-secondary {
  font-size: 1.1rem !important;
  font-weight: 700;
  padding: 0.85rem 2.2rem !important;
  background: rgba(255, 255, 255, 0.12) !important;
  color: #fff !important;
  border: 1px solid rgba(255, 255, 255, 0.35) !important;
  backdrop-filter: blur(8px);
}

.home-btn-secondary:hover {
  background: var(--accent) !important;
  border-color: var(--accent) !important;
  color: #fff !important;
}

@media screen and (max-width: 768px) {
  .home-title {
    font-size: 2.4rem;
  }

  .home-subtitle {
    font-size: 1.05rem;
  }

  .home-hero-bg::after {
    background: linear-gradient(
      to bottom,
      rgba(10, 10, 10, 0.85) 0%,
      rgba(10, 10, 10, 0.55) 60%,
      rgba(10, 10, 10, 0.8) 100%
    );
  }
}

/* ============================================
   Platform Page — Meshcapade-style Layout
   ============================================ */

.platform-page {
  padding-top: 4.5rem; /* navbar height */
  background: var(--dark-bg);
}

/* ---- Tab Cards Row ---- */
.platform-tabs-row {
  display: flex;
  gap: 0;
}

.platform-tab {
  flex: 1;
  background: var(--dark-bg-card);
  border: none;
  border-bottom: 3px solid transparent;
  padding: 1.5rem 1.5rem;
  cursor: pointer;
  display: flex;
  align-items: flex-start;
  gap: 1rem;
  text-align: left;
  transition: all 0.25s;
}

.platform-tab + .platform-tab {
  border-left: 1px solid var(--dark-border);
}

.platform-tab:hover {
  background: var(--dark-bg-hover);
}

.platform-tab.is-active {
  background: var(--dark-bg-light);
  border-bottom-color: var(--accent);
}

.platform-tab-icon {
  font-size: 1.4rem;
  color: var(--text-muted);
  flex-shrink: 0;
  margin-top: 0.15rem;
  transition: color 0.25s;
}

.platform-tab.is-active .platform-tab-icon {
  color: var(--accent);
}

.platform-tab-text {
  display: flex;
  flex-direction: column;
  gap: 0.15rem;
}

.platform-tab-label {
  font-size: 1rem;
  font-weight: 900;
  color: var(--text-primary);
}

.platform-tab-bold {
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--accent-light);
}

.platform-tab.is-active .platform-tab-bold {
  color: var(--accent-light);
}

.platform-tab-desc {
  font-size: 0.8rem;
  color: var(--text-muted);
  line-height: 1.4;
  margin-top: 0.1rem;
}

/* ---- Tab Panels (full-bleed hero style) ---- */
.platform-panels {
  position: relative;
}

.platform-panel {
  display: none;
  position: relative;
  min-height: calc(100vh - 4.5rem - 110px);
  overflow: hidden;
}

.platform-panel.is-active {
  display: block;
  animation: panelFadeIn 0.35s ease;
}

@keyframes panelFadeIn {
  from { opacity: 0; }
  to   { opacity: 1; }
}

/* Background video/image — full bleed */
.platform-panel-bg {
  position: absolute;
  inset: 0;
  z-index: 0;
}

.platform-panel-bg video,
.platform-panel-bg img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
}

.platform-panel-placeholder {
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--dark-bg-hover);
}

.platform-panel-placeholder i {
  font-size: 6rem;
  color: var(--text-muted);
  opacity: 0.25;
}

/* Gradient overlay — dark on right for text readability */
.platform-panel-overlay {
  position: relative;
  z-index: 1;
  min-height: calc(100vh - 4.5rem - 110px);
  display: flex;
  align-items: center;
  justify-content: flex-end;
  padding: 4rem 2.5rem;
  pointer-events: none;
  background: linear-gradient(
    to left,
    rgba(10, 10, 10, 0.92) 0%,
    rgba(10, 10, 10, 0.65) 45%,
    rgba(10, 10, 10, 0.15) 100%
  );
}

.platform-panel-content {
  max-width: 520px;
  pointer-events: auto;
}

.platform-panel-badge {
  display: inline-block;
  font-size: 0.8rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  padding: 0.3rem 0.9rem;
  border-radius: 20px;
  background: rgba(255, 255, 255, 0.12);
  backdrop-filter: blur(8px);
  color: #fff;
  margin-bottom: 1.25rem;
}

.platform-panel-headline {
  font-size: 3rem;
  font-weight: 900;
  color: #fff;
  line-height: 1.15;
  letter-spacing: -0.03em;
  margin-bottom: 1.25rem;
}

.platform-panel-desc {
  font-size: 1.1rem;
  color: rgba(255, 255, 255, 0.72);
  line-height: 1.7;
  margin-bottom: 2rem;
}

/* ---- Platform Responsive ---- */
@media screen and (max-width: 1023px) {
  .platform-tabs-row {
    flex-direction: column;
  }

  .platform-tab + .platform-tab {
    border-left: none;
    border-top: 1px solid var(--dark-border);
  }

  .platform-tab {
    padding: 1rem 1.25rem;
  }

  .platform-panel-overlay {
    justify-content: center;
    text-align: center;
    background: linear-gradient(
      to top,
      rgba(10, 10, 10, 0.92) 0%,
      rgba(10, 10, 10, 0.55) 60%,
      rgba(10, 10, 10, 0.3) 100%
    );
  }

  .platform-panel-headline {
    font-size: 2rem;
  }
}

@media screen and (max-width: 768px) {
  .platform-tab-desc {
    display: none;
  }

  .platform-panel-headline {
    font-size: 1.6rem;
  }

  .platform-panel-overlay {
    padding: 3rem 1.25rem;
  }
}

/* ---- TTS Audio Samples ---- */
.tts-samples-grid {
  position: absolute;
  top: 0;
  left: 0;
  width: 50%;
  height: 100%;
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 1rem;
  padding: 3rem 2.5rem;
  z-index: 2;
}

.tts-sample-card {
  background: rgba(255, 255, 255, 0.06);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 14px;
  padding: 1.25rem 1.5rem;
  transition: background 0.2s, border-color 0.2s;
}

.tts-sample-card:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: rgba(255, 255, 255, 0.15);
}

.tts-sample-text {
  font-size: 1.05rem;
  color: var(--text-primary);
  line-height: 1.6;
  margin-bottom: 0.85rem;
  font-family: 'Noto Sans JP', 'Lato', sans-serif;
}

.tts-sample-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.tts-emotion-badge {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  padding: 0.25rem 0.75rem;
  border-radius: 20px;
  color: #fff;
}

.tts-emotion-happy {
  background: rgba(76, 175, 80, 0.35);
  color: #81c784;
}

.tts-emotion-sad {
  background: rgba(66, 165, 245, 0.35);
  color: #90caf9;
}

.tts-emotion-angry {
  background: rgba(239, 83, 80, 0.35);
  color: #ef9a9a;
}

.tts-play-btn {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  border: 1px solid rgba(255, 255, 255, 0.2);
  background: rgba(255, 255, 255, 0.08);
  color: #fff;
  font-size: 0.85rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background 0.2s, border-color 0.2s, transform 0.15s;
  flex-shrink: 0;
}

.tts-play-btn:hover {
  background: var(--accent);
  border-color: var(--accent);
  transform: scale(1.1);
}

.tts-play-btn.is-playing {
  background: var(--accent);
  border-color: var(--accent);
}

@media screen and (max-width: 1023px) {
  .tts-samples-grid {
    position: relative;
    width: 100%;
    padding: 2rem 1.25rem 0;
  }
}

@media screen and (max-width: 768px) {
  .tts-samples-grid {
    padding: 1.5rem 1rem 0;
  }

  .tts-sample-text {
    font-size: 0.95rem;
  }
}

/* ============================================
   Navbar — Contact Button & Active State
   ============================================ */

.contact-btn {
  background: var(--accent) !important;
  color: #fff !important;
  border-radius: 6px !important;
  padding: 0.4rem 1rem !important;
  margin: 0.5rem 0.25rem;
  font-weight: 700 !important;
  font-size: 0.9rem !important;
  transition: background 0.2s, opacity 0.2s;
}

.contact-btn:hover {
  opacity: 0.85;
  color: #fff !important;
}

.is-active-page {
  color: var(--text-primary) !important;
  border-bottom: 2px solid var(--accent);
}

@media screen and (max-width: 1023px) {
  .is-active-page {
    border-bottom: none;
    color: var(--accent-light) !important;
  }
}