@import url('https://fonts.googleapis.com/css2?family=Open+Sans:wght@300;400;500;600;700&family=Poppins:wght@400;500;600;700&display=swap');

*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

:root {
  --c-primary: #ff0000;
  --c-secondary: #ff1493;
  --c-dark: #261717;
  --c-dark2: #1a0f0f;
  --c-dark3: #320f1e;
  --c-card-bg: rgba(38,23,23,0.82);
  --c-card-border: rgba(255,20,147,0.3);
  --c-text: #f5e6ef;
  --c-text-muted: #c9a0b8;
  --c-glow-red: rgba(255,0,0,0.35);
  --c-glow-pink: rgba(255,20,147,0.35);
  --radius-card: 28px;
  --nav-h: 64px;
  --font-head: 'Poppins', 'Open Sans', system-ui, sans-serif;
  --font-body: 'Open Sans', 'Poppins', system-ui, sans-serif;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.7;
  color: var(--c-text);
  background-color: var(--c-dark);
  min-height: 100vh;
  overflow-x: hidden;
  padding-bottom: var(--nav-h);
}

/* ── Aurora Background ── */
.aurora-bg {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  overflow: hidden;
}

.aurora-layer {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  opacity: 0.55;
  mix-blend-mode: screen;
}

.aurora-1 {
  width: 120vw;
  height: 120vw;
  top: -40vw;
  left: -30vw;
  background: radial-gradient(ellipse at 40% 40%, #ff000088 0%, #ff149388 45%, transparent 70%);
  animation: aurora-drift1 11s ease-in-out infinite alternate;
}

.aurora-2 {
  width: 100vw;
  height: 80vw;
  bottom: -20vw;
  right: -20vw;
  background: radial-gradient(ellipse at 60% 60%, #ff149366 0%, #ff000055 50%, transparent 75%);
  animation: aurora-drift2 9s ease-in-out infinite alternate;
}

.aurora-3 {
  width: 80vw;
  height: 60vw;
  top: 30%;
  left: 20%;
  background: conic-gradient(from 180deg at 50% 50%, #ff0000aa 0deg, #ff1493aa 120deg, #26171700 240deg, #ff0000aa 360deg);
  background-size: 200% 200%;
  opacity: 0.25;
  animation: aurora-spin 12s linear infinite;
}

.grid-overlay {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255,20,147,0.07) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,20,147,0.07) 1px, transparent 1px);
  background-size: 48px 48px;
}

@keyframes aurora-drift1 {
  0% { transform: translate(0,0) scale(1); }
  100% { transform: translate(6vw, 4vh) scale(1.08); }
}
@keyframes aurora-drift2 {
  0% { transform: translate(0,0) scale(1.05); }
  100% { transform: translate(-5vw, -3vh) scale(1); }
}
@keyframes aurora-spin {
  0% { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}

@media (prefers-reduced-motion: reduce) {
  .aurora-1, .aurora-2, .aurora-3 {
    animation: none;
  }
}

/* ── Site Header / Hero ── */
.site-header {
  position: relative;
  z-index: 1;
}

.hero-wrap {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 80px 24px calc(var(--nav-h) + 40px);
  scroll-margin-top: var(--nav-h);
}

.hero-inner {
  max-width: 720px;
  width: 100%;
}

.brand-logo {
  max-height: 80px;
  width: auto;
  margin-bottom: 24px;
}

.brand-text {
  font-family: var(--font-head);
  font-size: 1.6rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  background: linear-gradient(135deg, var(--c-primary), var(--c-secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  display: inline-block;
  margin-bottom: 24px;
}

.hero-h1 {
  font-family: var(--font-head);
  font-size: clamp(2rem, 6vw, 4rem);
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: 20px;
  background: linear-gradient(135deg, #fff 20%, var(--c-secondary) 80%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  text-shadow: none;
  filter: drop-shadow(0 0 24px var(--c-glow-pink));
}

.hero-sub {
  font-size: 1.1rem;
  color: var(--c-text-muted);
  max-width: 560px;
  margin: 0 auto 36px;
  line-height: 1.7;
}

.hero-cta {
  display: inline-block;
  padding: 14px 40px;
  border-radius: 50px;
  background: linear-gradient(135deg, var(--c-primary), var(--c-secondary));
  color: #fff;
  font-family: var(--font-head);
  font-weight: 600;
  font-size: 1rem;
  text-decoration: none;
  letter-spacing: 0.04em;
  box-shadow: 0 0 28px var(--c-glow-red), 0 4px 16px rgba(0,0,0,0.4);
  transition: transform 0.2s, box-shadow 0.2s;
  min-height: 48px;
  line-height: 1.2;
}

.hero-cta:hover {
  transform: translateY(-3px) scale(1.04);
  box-shadow: 0 0 48px var(--c-glow-pink), 0 8px 24px rgba(0,0,0,0.5);
}

/* ── Main Content ── */
main {
  position: relative;
  z-index: 1;
}

.wrap {
  max-width: 1200px;
  margin: 0 auto;
  padding: 40px 24px;
}

/* nav > ol > li > a structure */
.content-section {
  display: grid;
  grid-template-columns: 1fr 320px;
  gap: 40px;
  align-items: start;
}

.content-article {
  min-width: 0;
}

/* ── page.content sections ── */
.page-content div {
  scroll-margin-top: calc(var(--nav-h) + 16px);
  margin-bottom: 64px;
  padding: 40px;
  background: var(--c-card-bg);
  border: 1px solid var(--c-card-border);
  border-radius: var(--radius-card);
  border-bottom: 3px solid var(--c-primary);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  box-shadow: 0 4px 32px rgba(0,0,0,0.3), 0 0 16px var(--c-glow-pink);
  transition: box-shadow 0.3s, transform 0.3s;
}

.page-content div:hover {
  box-shadow: 0 8px 48px rgba(0,0,0,0.4), 0 0 32px var(--c-glow-pink);
  transform: translateY(-2px);
}

@media (prefers-reduced-motion: reduce) {
  .page-content div:hover {
    transform: none;
  }
}

.page-content h2 {
  font-family: var(--font-head);
  font-size: clamp(1.4rem, 3vw, 2rem);
  font-weight: 700;
  margin-bottom: 20px;
  background: linear-gradient(135deg, var(--c-primary), var(--c-secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1.3;
}

.page-content h2 span {
  display: inline;
}

.page-content h3 {
  font-family: var(--font-head);
  font-size: 1.2rem;
  font-weight: 600;
  margin: 24px 0 12px;
  color: var(--c-secondary);
}

.page-content h3 span {
  display: inline;
}

.page-content p {
  color: var(--c-text);
  font-size: 1rem;
  line-height: 1.8;
  margin-bottom: 16px;
}

.page-content ul,
.page-content ol {
  padding-left: 1.5em;
  margin-bottom: 16px;
}

.page-content li {
  margin-bottom: 8px;
  line-height: 1.7;
  color: var(--c-text);
}

.page-content a {
  color: var(--c-secondary);
  text-decoration: none;
  border-bottom: 1px solid rgba(255,20,147,0.4);
  transition: color 0.2s, border-color 0.2s;
}

.page-content a:hover {
  color: var(--c-primary);
  border-color: var(--c-primary);
}

.page-content strong {
  color: #fff;
  font-weight: 600;
}

.page-content em {
  color: var(--c-secondary);
  font-style: italic;
}

.page-content img {
  max-width: 100%;
  border-radius: 16px;
  margin: 16px 0;
}

/* ── Aside ── */
.content-aside {
  position: sticky;
  top: 24px;
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.aside-card {
  background: var(--c-card-bg);
  border: 1px solid var(--c-card-border);
  border-radius: var(--radius-card);
  border-bottom: 3px solid var(--c-secondary);
  padding: 28px 24px;
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  box-shadow: 0 4px 24px rgba(0,0,0,0.25), 0 0 12px var(--c-glow-pink);
}

.aside-highlight {
  border-bottom-color: var(--c-primary);
  box-shadow: 0 4px 24px rgba(0,0,0,0.25), 0 0 16px var(--c-glow-red);
}

.aside-title {
  font-family: var(--font-head);
  font-size: 1rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: 16px;
  color: var(--c-secondary);
}

.aside-title span {
  display: inline;
}

.aside-nav-list {
  list-style: none;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.aside-link {
  display: block;
  padding: 10px 14px;
  border-radius: 10px;
  color: var(--c-text-muted);
  text-decoration: none;
  font-size: 0.9rem;
  font-weight: 500;
  transition: background 0.2s, color 0.2s, transform 0.2s;
  min-height: 40px;
  line-height: 1.4;
  display: flex;
  align-items: center;
}

.aside-link:hover {
  background: rgba(255,20,147,0.15);
  color: #fff;
  transform: translateX(4px);
}

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

.aside-desc {
  font-size: 0.9rem;
  color: var(--c-text-muted);
  line-height: 1.7;
}

/* ── Footer ── */
.site-footer {
  position: relative;
  z-index: 1;
  text-align: center;
  padding: 40px 24px calc(var(--nav-h) + 24px);
  border-top: 1px solid rgba(255,20,147,0.2);
  background: linear-gradient(to bottom, transparent, rgba(26,15,15,0.9));
}

.site-footer p {
  font-size: 0.95rem;
  color: var(--c-text-muted);
  margin-bottom: 12px;
  line-height: 1.6;
}

.site-footer a {
  color: var(--c-secondary);
  text-decoration: none;
  transition: color 0.2s;
}

.site-footer a:hover {
  color: var(--c-primary);
}

.site-footer small {
  display: block;
  font-size: 0.8rem;
  color: rgba(201,160,184,0.6);
  line-height: 1.6;
  max-width: 600px;
  margin: 0 auto;
}

/* ── Bottom Fixed Navigation ── */
.bottom-nav {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: 100;
  height: var(--nav-h);
  background: rgba(26,15,15,0.96);
  border-top: 1px solid rgba(255,20,147,0.25);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  box-shadow: 0 -4px 24px rgba(0,0,0,0.5), 0 -1px 0 rgba(255,20,147,0.15);
}

.bottom-nav ol {
  list-style: none;
  display: flex;
  align-items: center;
  justify-content: center;
  height: 100%;
  padding: 0 8px;
  gap: 0;
  overflow-x: auto;
  scrollbar-width: none;
}

.bottom-nav ol::-webkit-scrollbar {
  display: none;
}

.bottom-nav li {
  flex: 1;
  min-width: 0;
  display: flex;
  align-items: center;
  justify-content: center;
}

/* Brand center item (4th - middle of 7) */
.bottom-nav li:nth-child(4) a {
  font-weight: 700;
  background: linear-gradient(135deg, var(--c-primary), var(--c-secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  font-size: 0.85rem;
}

.bottom-nav a {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  min-height: 44px;
  padding: 8px 4px;
  color: var(--c-text-muted);
  text-decoration: none;
  font-family: var(--font-head);
  font-size: 0.72rem;
  font-weight: 500;
  letter-spacing: 0.01em;
  text-align: center;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  transition: color 0.2s;
  line-height: 1.2;
}

.bottom-nav a:hover,
.bottom-nav a:focus {
  color: var(--c-primary);
}

/* ── Parallax / Scroll effects ── */
@media (prefers-reduced-motion: no-preference) {
  .page-content div {
    transition: box-shadow 0.3s ease, transform 0.3s ease;
  }
}

/* ── Responsive ── */
@media (max-width: 900px) {
  .content-section {
    grid-template-columns: 1fr;
  }
  .content-aside {
    position: static;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
  }
}

@media (max-width: 600px) {
  .content-aside {
    grid-template-columns: 1fr;
  }
  .page-content div {
    padding: 24px 20px;
    margin-bottom: 40px;
  }
  .wrap {
    padding: 24px 16px;
  }
  .hero-wrap {
    padding: 60px 16px calc(var(--nav-h) + 32px);
  }
  .bottom-nav ol {
    gap: 0;
    justify-content: space-around;
  }
  .bottom-nav a {
    font-size: 0.65rem;
    padding: 6px 2px;
  }
}

@media (max-width: 375px) {
  .hero-h1 {
    font-size: 1.6rem;
  }
  .hero-sub {
    font-size: 0.95rem;
  }
  .page-content h2 {
    font-size: 1.2rem;
  }
}

/* ── Luminous glow keyframe for cards on scroll-in ── */
@keyframes card-glow-in {
  from {
    opacity: 0;
    transform: translateY(20px);
    box-shadow: 0 0 0 transparent;
  }
  to {
    opacity: 1;
    transform: translateY(0);
    box-shadow: 0 4px 32px rgba(0,0,0,0.3), 0 0 16px var(--c-glow-pink);
  }
}

button[aria-expanded]{min-width:44px;min-height:44px}