:root {
  --bg-gradient: radial-gradient(circle at top, rgba(56, 189, 248, 0.18), transparent 55%),
                  radial-gradient(circle at 20% 80%, rgba(192, 132, 252, 0.16), transparent 55%),
                  radial-gradient(circle at 80% 20%, rgba(248, 113, 113, 0.18), transparent 60%),
                  #030712;
  --surface: rgba(15, 23, 42, 0.82);
  --surface-elevated: rgba(30, 41, 59, 0.9);
  --border: rgba(148, 163, 184, 0.18);
  --border-strong: rgba(148, 163, 184, 0.35);
  --text-primary: #f8fafc;
  --text-secondary: #cbd5f5;
  --muted: #94a3b8;
  --accent: #38bdf8;
  --accent-strong: #0ea5e9;
  --accent-soft: rgba(56, 189, 248, 0.2);
  --radius-lg: 22px;
  --radius-md: 16px;
  --radius-sm: 12px;
  --shadow-soft: 0 18px 40px rgba(15, 23, 42, 0.45);
  --shadow-hover: 0 22px 45px rgba(15, 23, 42, 0.6);
  --transition: all 0.3s ease;
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: 'Heebo', 'Inter', 'Segoe UI', sans-serif;
  background: var(--bg-gradient);
  color: var(--text-primary);
  line-height: 1.65;
  display: flex;
  flex-direction: column;
  position: relative;
}

body::before {
  content: '';
  position: fixed;
  inset: 0;
  background: linear-gradient(135deg, rgba(8, 145, 178, 0.15), transparent 65%);
  pointer-events: none;
  z-index: -3;
}

#particles-js {
  position: fixed;
  inset: 0;
  z-index: -2;
}

a {
  color: var(--accent);
  text-decoration: none;
  transition: color 0.25s ease;
}

a:hover,
a:focus {
  color: var(--accent-strong);
}

button,
.button {
  font: inherit;
  cursor: pointer;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.35rem;
  padding: 0.7rem 1.6rem;
  border-radius: 999px;
  background: linear-gradient(135deg, var(--accent), #60a5fa);
  color: #02131f;
  font-weight: 700;
  letter-spacing: 0.02em;
  border: none;
  box-shadow: 0 10px 25px rgba(56, 189, 248, 0.3);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.button:hover,
.button:focus-visible {
  transform: translateY(-2px);
  box-shadow: 0 16px 30px rgba(56, 189, 248, 0.35);
}

.button--secondary {
  background: rgba(15, 23, 42, 0.65);
  color: rgba(226, 232, 240, 0.95);
  border: 1px solid rgba(148, 163, 184, 0.45);
  box-shadow: inset 0 0 0 1px rgba(148, 163, 184, 0.2);
  backdrop-filter: blur(10px);
}

.button--secondary:hover,
.button--secondary:focus-visible {
  border-color: rgba(148, 197, 255, 0.9);
  color: #cfe8ff;
  background: rgba(30, 58, 138, 0.75);
}

.button.loading::after {
  content: '…';
  margin-left: 0.35rem;
}

.page-content {
  flex: 1;
  display: flex;
  flex-direction: column;
}

.content-container {
  width: min(1120px, calc(100% - 3rem));
  margin: 0 auto;
}

@media (max-width: 640px) {
  .content-container {
    width: calc(100% - 2.5rem);
  }
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  backdrop-filter: blur(18px);
  background: rgba(2, 6, 23, 0.82);
  border-bottom: 1px solid var(--border);
}

.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 1rem 6vw;
  margin: 0 auto;
  width: min(1120px, 100%);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  font-family: 'Oxygen', 'Heebo', sans-serif;
  font-size: 1.45rem;
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: 0.04em;
}

.brand::before {
  content: '';
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: linear-gradient(135deg, #f472b6, var(--accent));
  box-shadow: 0 0 12px rgba(56, 189, 248, 0.55);
}

.nav-toggle {
  display: none;
  align-items: center;
  justify-content: center;
  width: 2.75rem;
  height: 2.75rem;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  background: rgba(15, 23, 42, 0.75);
  color: var(--text-primary);
  transition: var(--transition);
}

.nav-toggle span {
  position: relative;
  display: block;
  width: 1.4rem;
  height: 2px;
  background: currentColor;
  border-radius: 999px;
  transition: transform 0.3s ease, opacity 0.3s ease;
}

.nav-toggle span + span {
  margin-top: 0.3rem;
}

.nav-toggle[aria-expanded='true'] span:nth-child(1) {
  transform: translateY(6px) rotate(45deg);
}

.nav-toggle[aria-expanded='true'] span:nth-child(2) {
  opacity: 0;
}

.nav-toggle[aria-expanded='true'] span:nth-child(3) {
  transform: translateY(-6px) rotate(-45deg);
}

.site-nav {
  display: flex;
  align-items: center;
}

.site-nav ul {
  display: flex;
  list-style: none;
  gap: 0.5rem;
  margin: 0;
  padding: 0;
}

.site-nav a {
  display: inline-flex;
  align-items: center;
  padding: 0.55rem 1.05rem;
  border-radius: 999px;
  font-weight: 600;
  color: var(--muted);
  transition: var(--transition);
}

.site-nav a:hover,
.site-nav a:focus-visible {
  color: var(--text-primary);
  background: rgba(148, 163, 184, 0.12);
}

.site-nav a.is-active {
  background: linear-gradient(135deg, rgba(56, 189, 248, 0.18), rgba(99, 102, 241, 0.24));
  color: var(--text-primary);
  border: 1px solid rgba(56, 189, 248, 0.35);
  box-shadow: 0 12px 25px rgba(56, 189, 248, 0.18);
}

@media (max-width: 920px) {
  .nav-toggle {
    display: inline-flex;
  }

  .site-nav {
    position: absolute;
    top: 100%;
    left: 0;
    width: 100%;
    padding: 0 6vw 1.5rem;
    background: rgba(2, 6, 23, 0.95);
    border-bottom: 1px solid rgba(148, 163, 184, 0.15);
    opacity: 0;
    transform: translateY(-0.75rem);
    pointer-events: none;
    transition: var(--transition);
  }

  .site-nav.is-open {
    opacity: 1;
    transform: translateY(0);
    pointer-events: auto;
  }

  .site-nav ul {
    flex-direction: column;
    align-items: stretch;
    gap: 0.75rem;
    margin-top: 1rem;
  }

  .site-nav a {
    justify-content: center;
    padding: 0.7rem 1.1rem;
    border-radius: var(--radius-sm);
  }
}

.hero {
  padding: clamp(4rem, 8vw, 6.5rem) 0 clamp(3rem, 6vw, 4.5rem);
  position: relative;
  overflow: hidden;
}

.hero .content-container {
  display: grid;
  justify-items: center;
  text-align: center;
  gap: 1.5rem;
}

.hero-title {
  font-size: clamp(2.8rem, 6vw, 3.8rem);
  margin: 0;
  letter-spacing: -0.02em;
  color: var(--text-primary);
}

.hero--subpage {
  padding: clamp(3rem, 7vw, 5rem) 0 clamp(2.5rem, 5vw, 4rem);
}

.hero--subpage .hero-title {
  font-size: clamp(2.2rem, 5vw, 3.1rem);
}

.hero--subpage .hero-subtitle {
  font-size: 1.02rem;
  max-width: 640px;
}

.hero-subtitle {
  max-width: 680px;
  margin: 0 auto;
  color: var(--text-secondary);
  font-size: 1.1rem;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 1rem;
  margin-top: 0.5rem;
}

.page-section {
  padding: clamp(3rem, 6vw, 4.5rem) 0;
}

.section-heading {
  text-align: center;
  max-width: 720px;
  margin: 0 auto 2.5rem;
}

.section-heading h2 {
  margin: 0 0 0.75rem;
  font-size: clamp(2rem, 4vw, 2.6rem);
  color: var(--text-primary);
}

.section-heading p {
  margin: 0;
  color: var(--text-secondary);
}

.card-grid {
  display: grid;
  gap: clamp(1.4rem, 3vw, 2.4rem);
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
}

.card {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: clamp(1.2rem, 2.6vw, 1.8rem);
  padding: clamp(1.6rem, 3.6vw, 2.4rem);
  border-radius: calc(var(--radius-lg) + 8px);
  background: linear-gradient(180deg, rgba(15, 23, 42, 0.92) 0%, rgba(3, 7, 18, 0.96) 100%);
  border: 1px solid rgba(148, 163, 184, 0.25);
  box-shadow: 0 26px 60px rgba(2, 6, 23, 0.55);
  overflow: visible;
  transition: transform 0.35s ease, box-shadow 0.35s ease, border-color 0.35s ease;
}

.card::before {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: inherit;
  background: linear-gradient(145deg, rgba(148, 197, 255, 0.12), rgba(59, 130, 246, 0));
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.35s ease;
}

.card:hover,
.card:focus-within {
  transform: translateY(-6px);
  box-shadow: 0 30px 70px rgba(2, 6, 23, 0.65);
  border-color: rgba(148, 197, 255, 0.45);
}

.card:hover::before,
.card:focus-within::before {
  opacity: 1;
}

.card__body,
.card__info {
  display: flex;
  flex-direction: column;
  gap: 0.85rem;
}

.card__title {
  margin: 0;
  font-size: 1.3rem;
  font-weight: 700;
  letter-spacing: 0.01em;
  color: var(--text-primary);
}

.card__meta {
  margin: -0.2rem 0 0;
  color: rgba(148, 197, 255, 0.86);
  font-size: 0.96rem;
  letter-spacing: 0.03em;
  text-transform: uppercase;
}

.card__description {
  margin: 0;
  color: rgba(224, 231, 255, 0.92);
  font-size: 0.98rem;
  line-height: 1.6;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.card__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 0.25rem;
}

.card__actions .button {
  flex: 1 1 180px;
  min-width: 0;
}

.card--game {
  gap: clamp(1.4rem, 3vw, 2rem);
  padding: clamp(1.7rem, 3.6vw, 2.6rem);
  background: linear-gradient(180deg, rgba(15, 23, 42, 0.94) 0%, rgba(2, 6, 23, 0.98) 65%, rgba(2, 6, 23, 1) 100%);
  backdrop-filter: blur(12px);
}

.card--game .card__info {
  position: relative;
  z-index: 1;
  margin-top: calc(-1 * clamp(1.2rem, 3.6vw, 2rem));
  background: linear-gradient(180deg, rgba(241, 245, 249, 0.16) 0%, rgba(15, 23, 42, 0.88) 100%);
  border-radius: calc(var(--radius-lg) - 4px);
  border: 1px solid rgba(148, 163, 184, 0.24);
  padding: clamp(1.2rem, 2.4vw, 1.6rem);
  box-shadow: inset 0 1px 0 rgba(148, 197, 255, 0.18);
}

.card--game .card__meta {
  letter-spacing: 0.06em;
  font-size: 0.9rem;
}

.card--game .card__description {
  color: rgba(219, 234, 254, 0.9);
}

.card--game .card__actions {
  margin-top: 0.6rem;
}

.card--game .button {
  border-radius: 16px;
  font-weight: 700;
  background: linear-gradient(135deg, #38bdf8, #818cf8);
  color: #04121f;
  box-shadow: 0 18px 42px rgba(56, 189, 248, 0.35);
}

.card--game .button:hover,
.card--game .button:focus-visible {
  box-shadow: 0 24px 48px rgba(56, 189, 248, 0.4);
}

.card--game .button.button--secondary {
  background: rgba(8, 47, 73, 0.72);
  border: 1px solid rgba(148, 197, 255, 0.35);
  color: rgba(224, 231, 255, 0.9);
  box-shadow: inset 0 0 0 1px rgba(148, 197, 255, 0.15);
}

.card--game .button.button--secondary:hover,
.card--game .button.button--secondary:focus-visible {
  background: rgba(14, 116, 144, 0.82);
}

.card--game .card__art {
  margin: 0;
  position: relative;
  display: flex;
  justify-content: center;
}

.card--game .card__art img {
  width: min(360px, 96%);
  height: auto;
  display: block;
  border-radius: clamp(26px, 5vw, 34px);
  transform: translateY(calc(-1 * clamp(2.6rem, 6vw, 3.6rem)));
  filter: drop-shadow(0 36px 62px rgba(15, 23, 42, 0.6));
  background: transparent;
}



.detail-layout {
  display: grid;
  gap: clamp(2rem, 4vw, 3rem);
  align-items: flex-start;
}

@media (min-width: 900px) {
  .detail-layout {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 1fr);
  }
}

.detail-media {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-soft);
  background: #020b1f;
  display: flex;
  align-items: center;
  justify-content: center;
}

.detail-media::after {
  content: "";
  position: absolute;
  inset: auto 0 0 0;
  height: 55%;
  background: linear-gradient(
    180deg,
    rgba(2, 6, 23, 0) 0%,
    rgba(2, 6, 23, 0.45) 50%,
    rgba(2, 6, 23, 0.92) 100%
  );
  pointer-events: none;
}

.detail-media img {
  position: relative;
  display: block;
  width: 100%;
  height: auto;
  object-fit: contain;
}

.detail-body {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: clamp(1.5rem, 3vw, 2rem);
  box-shadow: var(--shadow-soft);
}

.detail-body h1 {
  margin-top: 0;
  margin-bottom: 0.75rem;
  font-size: clamp(2rem, 4vw, 2.6rem);
}

.detail-body p {
  color: var(--text-secondary);
  margin-bottom: 1rem;
}

.detail-body .button-group {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 1.5rem;
}

.panel {
  background: var(--surface);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
  padding: clamp(1.5rem, 3vw, 2rem);
  box-shadow: var(--shadow-soft);
}

.panel + .panel {
  margin-top: 1.5rem;
}


.submission-highlights {
  display: grid;
  gap: clamp(1rem, 3vw, 1.5rem);
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  margin-bottom: clamp(1.5rem, 4vw, 2.5rem);
}

.highlight-card {
  position: relative;
  padding: 1.4rem 1.5rem 1.5rem;
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
  background: var(--surface-elevated);
  box-shadow: var(--shadow-soft);
  overflow: hidden;
}

.highlight-card::after {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at top right, rgba(56, 189, 248, 0.14), transparent 55%);
  pointer-events: none;
  opacity: 0.85;
}

.highlight-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2.25rem;
  height: 2.25rem;
  border-radius: 999px;
  background: rgba(56, 189, 248, 0.18);
  border: 1px solid rgba(56, 189, 248, 0.35);
  color: var(--accent);
  font-weight: 700;
  margin-bottom: 0.85rem;
}

.submission-grid {
  display: grid;
  gap: clamp(1.5rem, 4vw, 2.5rem);
}

@media (min-width: 980px) {
  .submission-grid {
    grid-template-columns: minmax(0, 1.6fr) minmax(260px, 1fr);
    align-items: start;
  }
}

.submission-main {
  display: flex;
  flex-direction: column;
  gap: clamp(1.5rem, 3vw, 2rem);
}

.submission-sidebar {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
  background: linear-gradient(135deg, rgba(15, 23, 42, 0.92), rgba(30, 41, 59, 0.92));
}

.submission-heading {
  display: grid;
  gap: 0.4rem;
}

.eyebrow {
  font-size: 0.8rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: rgba(148, 197, 255, 0.75);
}


.submission-header {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  margin-bottom: 1.5rem;
}

@media (min-width: 720px) {
  .submission-header {
    flex-direction: row;
    flex-wrap: wrap;
    justify-content: space-between;
    align-items: flex-start;
  }
}

.submission-header h2 {
  margin: 0 0 0.35rem;
}

.muted {
  color: var(--muted);
}

.auth-controls {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  align-items: stretch;
}

@media (min-width: 640px) {
  .auth-controls {
    align-items: flex-start;
  }
}

.auth-controls .button {
  width: 100%;
}

@media (min-width: 640px) {
  .auth-controls .button {
    width: auto;
  }
}

@media (min-width: 720px) {
  .submission-header .auth-controls {
    flex-basis: 100%;
  }
  .submission-header .submission-heading {
    flex-basis: 100%;
  }
}

.auth-hint {
  font-size: 0.8rem;
  margin: 0;
  color: var(--muted);
  max-width: 18ch;
  text-align: left;
}

@media (min-width: 640px) {
  .auth-hint {
    text-align: left;
  }
}

.auth-status {
  display: grid;
  gap: 0.5rem;
  width: 100%;
}

.auth-user {
  font-weight: 600;
  color: var(--text-secondary);
  justify-self: start;
}

.auth-status .button {
  width: 100%;
}

.submission-status {
  margin: 1rem 0;
  padding: 0.85rem 1rem;
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  background: rgba(15, 23, 42, 0.55);
  box-shadow: inset 0 0 0 1px rgba(148, 163, 184, 0.14);
}

.submission-status[hidden] {
  display: none;
}

.submission-status[data-status="success"] {
  border-color: rgba(34, 197, 94, 0.45);
  color: #bbf7d0;
  background: rgba(22, 101, 52, 0.35);
}

.submission-status[data-status="error"] {
  border-color: rgba(248, 113, 113, 0.45);
  color: #fecaca;
  background: rgba(127, 29, 29, 0.35);
}

.submission-status[data-status="warning"] {
  border-color: rgba(251, 191, 36, 0.45);
  color: #fef3c7;
  background: rgba(146, 64, 14, 0.35);
}

.submission-status[data-status="info"],
.submission-status[data-status=""] {
  border-color: rgba(125, 211, 252, 0.35);
  color: #bae6fd;
  background: rgba(30, 64, 175, 0.35);
}

.submission-fieldset {
  border: 0;
  padding: 0;
  margin: 0;
  display: grid;
  gap: clamp(1.25rem, 3vw, 1.75rem);
}

.form-section {
  position: relative;
  border-radius: var(--radius-lg);
  border: 1px solid rgba(148, 163, 184, 0.22);
  background: linear-gradient(150deg, rgba(30, 41, 59, 0.92), rgba(15, 23, 42, 0.88));
  padding: clamp(1.25rem, 3vw, 1.75rem);
  box-shadow: var(--shadow-soft);
  display: grid;
  gap: clamp(1rem, 2.5vw, 1.5rem);
  overflow: hidden;
}

.form-section::before {
  content: '';
  position: absolute;
  inset: -40% 40% auto -40%;
  height: 120%;
  background: radial-gradient(circle at top right, rgba(56, 189, 248, 0.12), transparent 65%);
  pointer-events: none;
}

.form-section + .form-section {
  margin-top: clamp(1.1rem, 2.5vw, 1.6rem);
}

.form-section-header {
  position: relative;
  display: grid;
  gap: 0.35rem;
}

.form-section-title {
  margin: 0;
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--text-primary);
}

.form-section-description {
  margin: 0;
  color: var(--muted);
  font-size: 0.9rem;
  line-height: 1.5;
}

.form-section-body {
  position: relative;
  display: grid;
  gap: clamp(1rem, 2vw, 1.4rem);
}

.form-section-body > .form-group:last-child,
.form-section-body > .form-grid:last-child .form-group {
  margin-bottom: 0;
}

.field-help {
  font-size: 0.85rem;
  color: var(--muted);
  margin: 0;
}

.required {
  color: #fca5a5;
}

.form-actions {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  align-items: flex-start;
}

.form-actions .button {
  width: 100%;
}

@media (min-width: 640px) {
  .form-actions .button {
    width: auto;
  }
}

.submission-footnote {
  font-size: 0.9rem;
  color: var(--muted);
  margin: 0;
}

.submission-help {
  margin-top: 2rem;
  padding-top: 1.5rem;
  border-top: 1px solid rgba(148, 163, 184, 0.25);
  color: var(--text-secondary);
}

.submission-help h3 {
  margin-top: 0;
}

.submission-help ol {
  margin: 0 0 1rem 1.2rem;
  padding: 0;
  display: grid;
  gap: 0.5rem;
}

.submission-steps {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.75rem;
}

.submission-steps li {
  padding: 0.85rem 1rem;
  border-radius: var(--radius-sm);
  border: 1px solid rgba(148, 163, 184, 0.2);
  background: rgba(15, 23, 42, 0.65);
  color: var(--text-secondary);
  box-shadow: inset 0 0 0 1px rgba(148, 163, 184, 0.12);
}

.submission-steps strong {
  color: var(--text-primary);
}

.tips-card {
  border-radius: var(--radius-md);
  padding: 1.1rem 1.2rem 1.25rem;
  border: 1px solid rgba(148, 163, 184, 0.25);
  background: rgba(15, 23, 42, 0.72);
  box-shadow: inset 0 0 0 1px rgba(56, 189, 248, 0.08);
}

.tips-card h4 {
  margin-top: 0;
  margin-bottom: 0.6rem;
}

.tips-card ul {
  margin: 0;
  padding-left: 1.1rem;
  display: grid;
  gap: 0.45rem;
  color: var(--text-secondary);
}
.form-group {
  display: grid;
  gap: 0.5rem;
  margin-bottom: 1.25rem;
}

.form-grid {
  display: grid;
  gap: clamp(1rem, 2vw, 1.25rem);
}

@media (min-width: 720px) {
  .form-grid {
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    align-items: start;
  }
}

label {
  font-weight: 600;
  color: var(--text-primary);
}

input,
textarea,
select {
  width: 100%;
  padding: 0.75rem 1rem;
  border-radius: var(--radius-sm);
  border: 1px solid rgba(148, 163, 184, 0.28);
  background: rgba(15, 23, 42, 0.7);
  color: var(--text-primary);
  transition: border-color 0.25s ease, box-shadow 0.25s ease;
}

input:focus,
textarea:focus,
select:focus {
  outline: none;
  border-color: rgba(56, 189, 248, 0.6);
  box-shadow: 0 0 0 3px rgba(56, 189, 248, 0.2);
}

textarea {
  resize: vertical;
  min-height: 160px;
}

.accordion-list {
  display: grid;
  gap: 1.1rem;
}

details.accordion {
  background: var(--surface);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
  padding: 1.25rem 1.5rem;
  box-shadow: var(--shadow-soft);
  transition: var(--transition);
}

details.accordion[open] {
  border-color: var(--accent);
  background: var(--surface-elevated);
  box-shadow: var(--shadow-hover);
}

details.accordion summary {
  list-style: none;
  cursor: pointer;
  font-weight: 700;
  color: var(--text-primary);
  font-size: 1.05rem;
  position: relative;
}

details.accordion summary::-webkit-details-marker {
  display: none;
}

details.accordion summary::after {
  content: '+';
  position: absolute;
  right: 0;
  top: 0;
  color: var(--accent);
  font-size: 1.35rem;
  transition: transform 0.3s ease;
}

details.accordion[open] summary::after {
  transform: rotate(45deg);
}

details.accordion > *:not(summary) {
  margin-top: 0.85rem;
  color: var(--text-secondary);
}

.collapsible-group {
  display: grid;
  gap: 1rem;
}

.collapsible {
  width: 100%;
  background: var(--surface);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
  padding: 1.1rem 1.25rem;
  text-align: left;
  font-weight: 600;
  color: var(--text-primary);
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  transition: var(--transition);
}

.collapsible:hover,
.collapsible:focus-visible {
  border-color: var(--accent);
  color: var(--accent);
}

.collapsible::after {
  content: '+';
  font-size: 1.5rem;
  line-height: 1;
  color: var(--accent);
  transition: transform 0.3s ease;
}

.collapsible.is-open::after {
  transform: rotate(45deg);
}

.collapsible span {
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
}

.collapsible span small {
  font-size: 0.85rem;
  color: var(--muted);
  font-weight: 500;
}

.collapse-content {
  max-height: 0;
  overflow: hidden;
  border-radius: var(--radius-md);
  border: 1px solid transparent;
  background: rgba(15, 23, 42, 0.6);
  transition: max-height 0.3s ease, border-color 0.3s ease, padding 0.3s ease;
  padding: 0 1.25rem;
}

.collapse-content.is-open {
  border-color: var(--border-strong);
  padding: 1.25rem;
}

.tool-frame {
  width: 100%;
  min-height: 520px;
  border: none;
  border-radius: var(--radius-md);
  background: rgba(15, 23, 42, 0.65);
  box-shadow: inset 0 0 0 1px rgba(148, 163, 184, 0.15);
}

.panel--flush {
  padding: 0;
  overflow: hidden;
}

.panel--flush .tool-frame {
  border-radius: var(--radius-lg);
  min-height: clamp(480px, 60vw, 640px);
}

.uploader-layout {
  display: grid;
  gap: clamp(1.5rem, 4vw, 2.2rem);
}

@media (min-width: 980px) {
  .uploader-layout {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.1fr);
  }
}

.uploader-panel {
  display: flex;
  flex-direction: column;
  gap: 1.2rem;
}

.status {
  margin: 0;
  padding: 0.9rem 1rem;
  border-radius: var(--radius-sm);
  border: 1px solid rgba(148, 163, 184, 0.18);
  background: rgba(15, 23, 42, 0.6);
  color: var(--text-secondary);
  font-weight: 600;
}

.status.success {
  background: rgba(16, 185, 129, 0.16);
  border-color: rgba(16, 185, 129, 0.4);
  color: #d1fae5;
}

.status.error {
  background: rgba(248, 113, 113, 0.18);
  border-color: rgba(248, 113, 113, 0.38);
  color: #fee2e2;
}

.status.notice {
  background: rgba(59, 130, 246, 0.18);
  border-color: rgba(59, 130, 246, 0.4);
  color: #dbeafe;
}

.file-controls {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.file-list {
  display: grid;
  gap: 0.9rem;
}

.file-entry {
  background: rgba(15, 23, 42, 0.65);
  border-radius: var(--radius-md);
  border: 1px solid rgba(148, 163, 184, 0.18);
  padding: 1rem 1.25rem;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.file-name {
  font-weight: 600;
  color: var(--text-primary);
  word-break: break-word;
}

.file-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.6rem;
}

.download-link {
  color: var(--accent);
  font-weight: 600;
}

.download-link:hover,
.download-link:focus {
  color: var(--accent-strong);
}

.helper-text {
  color: var(--text-secondary);
  margin: 0;
  font-size: 0.95rem;
}

.file-entry .button {
  width: auto;
}

.empty-state {
  margin: 0;
  color: var(--text-secondary);
}

.tool-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 1rem;
}

.tool-note {
  color: var(--text-secondary);
  margin-top: 0.75rem;
}

.table-scroll {
  overflow-x: auto;
  border-radius: var(--radius-md);
  border: 1px solid var(--border);
}

pre,
code {
  font-family: 'JetBrains Mono', 'Fira Code', monospace;
}

pre {
  margin: 0;
  background: rgba(15, 23, 42, 0.75);
  border-radius: var(--radius-md);
  border: 1px solid var(--border);
  padding: 1rem;
  color: var(--text-secondary);
}

.site-footer {
  padding: 2.25rem 0;
  text-align: center;
  background: rgba(2, 6, 23, 0.85);
  border-top: 1px solid var(--border);
}

.site-footer p {
  margin: 0.35rem 0;
  color: var(--muted);
}

.site-footer a {
  color: var(--accent);
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  border: 0;
}

.js-reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

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

@media (max-width: 600px) {
  .hero-actions .button,
  .card__actions .button {
    width: 100%;
  }

  .nav-container {
    padding: 0.85rem 1.25rem;
  }

  .site-nav {
    padding: 0 1.25rem 1.25rem;
  }
}