/* ============================================================
   DauphinCraft — Landing Page Styles
   Palette: #051628 bg / #0b3d5c mid / #4fc3f7 accent / #e0e8f0 text
   ============================================================ */

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

:root {
  --bg-deep:    #051628;
  --bg-mid:     #0b3d5c;
  --bg-surface: #0d2d47;
  --accent:     #4fc3f7;
  --accent-dim: #29b6f6;
  --text:       #e0e8f0;
  --text-muted: #8db8cc;
  --border:     rgba(79, 195, 247, 0.2);
  --card-bg:    rgba(11, 61, 92, 0.5);
  --radius:     12px;
  --transition: 0.25s ease;
}

html { scroll-behavior: smooth; }

body {
  font-family: -apple-system, 'Segoe UI', Helvetica, Arial, sans-serif;
  background: var(--bg-deep);
  color: var(--text);
  line-height: 1.6;
  overflow-x: hidden;
}

a { color: var(--accent); text-decoration: none; transition: opacity var(--transition); }
a:hover { opacity: 0.8; }
a:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; border-radius: 3px; }

img { max-width: 100%; display: block; }
code {
  font-family: 'Consolas', 'Fira Code', monospace;
  background: rgba(79, 195, 247, 0.1);
  padding: 0.15em 0.5em;
  border-radius: 4px;
  font-size: 0.9em;
  color: var(--accent);
}

.container { max-width: 1100px; margin: 0 auto; padding: 0 1.5rem; }

/* ============================================================
   BUTTONS
   ============================================================ */
.btn {
  display: inline-flex; align-items: center; gap: 0.5rem;
  padding: 0.75rem 1.75rem;
  border-radius: 8px;
  font-weight: 600;
  font-size: 1rem;
  cursor: pointer;
  transition: transform var(--transition), box-shadow var(--transition), opacity var(--transition);
  text-decoration: none;
  border: none;
}
.btn:hover { transform: translateY(-2px); }
.btn:active { transform: translateY(0); }

.btn-primary {
  background: var(--accent);
  color: var(--bg-deep);
  box-shadow: 0 4px 20px rgba(79, 195, 247, 0.35);
}
.btn-primary:hover { box-shadow: 0 6px 28px rgba(79, 195, 247, 0.5); opacity: 1; }

.btn-secondary {
  background: transparent;
  color: var(--accent);
  border: 2px solid var(--accent);
}
.btn-secondary:hover { background: rgba(79, 195, 247, 0.1); opacity: 1; }

.btn-ghost {
  background: transparent;
  color: var(--text-muted);
  border: 1px solid var(--border);
}
.btn-ghost:hover { color: var(--accent); border-color: var(--accent); opacity: 1; }

/* ============================================================
   HEADER / NAV
   ============================================================ */
.nav-toggle { display: none; }

.site-header {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  display: flex; align-items: center; justify-content: space-between;
  padding: 0.9rem 1.5rem;
  background: rgba(5, 22, 40, 0.85);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}

.header-logo {
  display: flex; align-items: center; gap: 0.6rem;
  font-weight: 700; font-size: 1.15rem;
  color: var(--text); text-decoration: none;
}
.header-logo:hover { opacity: 0.85; }

.nav-links {
  display: flex; gap: 0.25rem; list-style: none;
}
.nav-links a {
  color: var(--text-muted);
  font-size: 0.9rem;
  padding: 0.4rem 0.75rem;
  border-radius: 6px;
  transition: color var(--transition), background var(--transition);
}
.nav-links a:hover { color: var(--text); background: rgba(79, 195, 247, 0.1); opacity: 1; }

.burger { display: none; flex-direction: column; gap: 5px; cursor: pointer; padding: 4px; }
.burger span {
  display: block; width: 24px; height: 2px;
  background: var(--text);
  border-radius: 2px;
  transition: transform var(--transition), opacity var(--transition);
}

/* ============================================================
   HERO
   ============================================================ */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex; align-items: center; justify-content: center;
  text-align: center;
  overflow: hidden;
  background: linear-gradient(160deg, var(--bg-deep) 0%, #072540 40%, var(--bg-mid) 100%);
  padding: 7rem 1.5rem 4rem;
}

/* Water ripple background */
.hero::before {
  content: '';
  position: absolute; inset: 0; z-index: 0;
  background:
    radial-gradient(ellipse 80% 40% at 50% 110%, rgba(79,195,247,0.08) 0%, transparent 70%),
    radial-gradient(ellipse 50% 30% at 20% 80%, rgba(41,182,246,0.05) 0%, transparent 60%);
  animation: ripple 8s ease-in-out infinite alternate;
}

@keyframes ripple {
  0%   { transform: scaleY(1)   translateY(0); opacity: 1; }
  50%  { transform: scaleY(1.04) translateY(-8px); opacity: 0.85; }
  100% { transform: scaleY(0.97) translateY(4px); opacity: 1; }
}

/* Particles */
.particles { position: absolute; inset: 0; pointer-events: none; z-index: 1; }

.particle {
  position: absolute;
  width: 3px; height: 3px;
  background: var(--accent);
  border-radius: 50%;
  opacity: 0;
  animation: drift 12s ease-in-out infinite;
}

@keyframes drift {
  0%   { opacity: 0; transform: translateY(0) translateX(0); }
  10%  { opacity: 0.6; }
  90%  { opacity: 0.3; }
  100% { opacity: 0; transform: translateY(-120px) translateX(20px); }
}

.p1  { left: 10%; top: 70%; animation-delay: 0s; animation-duration: 14s; }
.p2  { left: 25%; top: 80%; animation-delay: 1.5s; animation-duration: 11s; width: 2px; height: 2px; }
.p3  { left: 40%; top: 65%; animation-delay: 3s; animation-duration: 16s; width: 4px; height: 4px; opacity: 0.4; }
.p4  { left: 55%; top: 75%; animation-delay: 0.7s; animation-duration: 13s; }
.p5  { left: 70%; top: 85%; animation-delay: 2s; animation-duration: 15s; width: 2px; height: 2px; }
.p6  { left: 82%; top: 60%; animation-delay: 4s; animation-duration: 12s; }
.p7  { left: 15%; top: 55%; animation-delay: 5s; animation-duration: 17s; width: 2px; height: 2px; }
.p8  { left: 60%; top: 50%; animation-delay: 1s; animation-duration: 10s; }
.p9  { left: 88%; top: 78%; animation-delay: 6s; animation-duration: 14s; width: 4px; height: 4px; }
.p10 { left: 33%; top: 90%; animation-delay: 2.5s; animation-duration: 18s; }

.bubble {
  position: absolute;
  border: 1px solid rgba(79, 195, 247, 0.3);
  border-radius: 50%;
  opacity: 0;
  animation: bubble-rise 10s ease-in infinite;
}

@keyframes bubble-rise {
  0%   { opacity: 0; transform: translateY(0); }
  15%  { opacity: 0.5; }
  85%  { opacity: 0.2; }
  100% { opacity: 0; transform: translateY(-200px); }
}

.b1 { width: 12px; height: 12px; left: 18%; top: 85%; animation-delay: 0s; }
.b2 { width: 8px;  height: 8px;  left: 45%; top: 90%; animation-delay: 2.5s; }
.b3 { width: 16px; height: 16px; left: 68%; top: 80%; animation-delay: 5s; }
.b4 { width: 6px;  height: 6px;  left: 30%; top: 92%; animation-delay: 7s; }
.b5 { width: 10px; height: 10px; left: 80%; top: 88%; animation-delay: 3.5s; }

.hero-content {
  position: relative; z-index: 2;
  max-width: 700px;
}

.hero-logo { margin-bottom: 1.5rem; display: flex; justify-content: center; }
.hero-logo img { filter: drop-shadow(0 0 24px rgba(79,195,247,0.5)); }

h1 {
  font-size: clamp(3rem, 8vw, 6rem);
  font-weight: 800;
  letter-spacing: -0.02em;
  line-height: 1;
  color: var(--text);
  text-shadow: 0 0 40px rgba(79,195,247,0.3);
  margin-bottom: 1rem;
}

.tagline {
  font-size: clamp(1.1rem, 3vw, 1.4rem);
  color: var(--text-muted);
  margin-bottom: 2.5rem;
  line-height: 1.5;
}

.hero-actions {
  display: flex; gap: 1rem; justify-content: center; flex-wrap: wrap;
  margin-bottom: 1.5rem;
}

.hero-note {
  font-size: 0.85rem; color: var(--text-muted);
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.hero-scroll-hint {
  position: absolute; bottom: 2rem; left: 50%; transform: translateX(-50%);
  z-index: 2;
}
.scroll-arrow {
  display: block; width: 20px; height: 20px;
  border-right: 2px solid var(--accent); border-bottom: 2px solid var(--accent);
  transform: rotate(45deg);
  opacity: 0.5;
  animation: bounce 2s ease-in-out infinite;
}
@keyframes bounce {
  0%, 100% { transform: rotate(45deg) translateY(0); }
  50%       { transform: rotate(45deg) translateY(6px); }
}

/* ============================================================
   SECTIONS SHARED
   ============================================================ */
section { padding: 5rem 0; }

section h2 {
  font-size: clamp(1.8rem, 4vw, 2.5rem);
  font-weight: 700;
  margin-bottom: 2.5rem;
  text-align: center;
  color: var(--text);
}
section h2::after {
  content: '';
  display: block; width: 48px; height: 3px;
  background: var(--accent); border-radius: 2px;
  margin: 0.6rem auto 0;
}

/* Fade-in via IntersectionObserver */
.fade-in { opacity: 0; transform: translateY(24px); transition: opacity 0.6s ease, transform 0.6s ease; }
.fade-in.visible { opacity: 1; transform: none; }

/* ============================================================
   SCREENSHOTS
   ============================================================ */
.screenshots { background: var(--bg-surface); }

.screenshots-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.25rem;
}

.screenshots-grid figure {
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--border);
  background: var(--card-bg);
}

.screenshots-grid img {
  width: 100%;
  aspect-ratio: 16/9;
  object-fit: cover;
  transition: transform 0.4s ease;
}
.screenshots-grid figure:hover img { transform: scale(1.04); }

figcaption {
  padding: 0.6rem 0.9rem;
  font-size: 0.85rem;
  color: var(--text-muted);
  text-align: center;
}

.screenshot-placeholder {
  aspect-ratio: 16/9;
}
.placeholder-inner {
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  height: 100%; min-height: 160px; gap: 0.75rem;
  color: var(--text-muted); font-size: 0.9rem;
  padding: 1rem;
}

/* ============================================================
   FEATURES
   ============================================================ */
.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.25rem;
}

.feature-card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.75rem 1.5rem;
  transition: border-color var(--transition), transform var(--transition), box-shadow var(--transition);
}
.feature-card:hover {
  border-color: var(--accent);
  transform: translateY(-4px);
  box-shadow: 0 8px 30px rgba(79,195,247,0.12);
}

.feature-icon {
  width: 48px; height: 48px;
  background: rgba(79, 195, 247, 0.12);
  border-radius: 10px;
  display: flex; align-items: center; justify-content: center;
  margin-bottom: 1rem;
  color: var(--accent);
}
.feature-icon svg { width: 24px; height: 24px; }

.feature-card h3 {
  font-size: 1.05rem; font-weight: 700;
  margin-bottom: 0.5rem; color: var(--text);
}
.feature-card p { font-size: 0.9rem; color: var(--text-muted); line-height: 1.6; }

/* ============================================================
   DOWNLOAD
   ============================================================ */
.download { background: var(--bg-surface); }

.download-cards {
  display: grid; grid-template-columns: 1fr 1fr; gap: 1.5rem;
  max-width: 700px; margin: 0 auto;
}

.download-card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 2rem 1.75rem;
  text-align: center;
  transition: border-color var(--transition);
}
.download-card:hover { border-color: var(--accent); }
.download-icon { color: var(--accent); margin: 0 auto 1rem; opacity: 0.8; }
.download-card h3 { margin-bottom: 0.4rem; }
.download-card p { font-size: 0.85rem; color: var(--text-muted); margin-bottom: 1.25rem; }

/* ============================================================
   JOIN SERVER
   ============================================================ */
.join { text-align: center; }
.join .container { display: flex; flex-direction: column; align-items: center; }

.join-sub { color: var(--text-muted); margin-bottom: 2rem; font-size: 1.05rem; }

.server-connect {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem 2rem;
  max-width: 480px; width: 100%;
}

.server-address {
  display: flex; align-items: center; justify-content: center; gap: 0.75rem;
  margin-bottom: 0.75rem;
}
.server-address code { font-size: 1.1rem; }

.btn-copy {
  display: inline-flex; align-items: center; gap: 0.4rem;
  background: rgba(79, 195, 247, 0.1);
  border: 1px solid var(--border);
  color: var(--accent);
  padding: 0.4rem 0.9rem;
  border-radius: 6px;
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
  transition: background var(--transition);
}
.btn-copy:hover { background: rgba(79, 195, 247, 0.2); }
.btn-copy.copied { background: rgba(79,195,247,0.25); }

.server-hint { font-size: 0.88rem; color: var(--text-muted); }

/* ============================================================
   SELF-HOST
   ============================================================ */
.selfhost { background: var(--bg-surface); }

.selfhost-steps {
  display: flex; align-items: flex-start; gap: 3rem;
  max-width: 700px; margin: 0 auto;
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 2rem;
}

.selfhost-steps ol {
  flex: 1;
  padding-left: 1.25rem;
  color: var(--text-muted);
  font-size: 0.95rem;
  line-height: 2;
}
.selfhost-steps ol li code { font-size: 0.82rem; }

.selfhost-links {
  display: flex; flex-direction: column; gap: 0.75rem;
  flex-shrink: 0;
}

/* ============================================================
   FOOTER
   ============================================================ */
.site-footer {
  background: var(--bg-deep);
  border-top: 1px solid var(--border);
  padding: 3rem 0 1.5rem;
}

.footer-grid {
  display: grid; grid-template-columns: auto 1fr auto;
  gap: 2rem; align-items: start;
  margin-bottom: 2rem;
}

.footer-brand {
  display: flex; align-items: center; gap: 0.5rem;
  font-weight: 700; color: var(--text); font-size: 1.1rem;
}

.site-footer nav ul { list-style: none; display: flex; flex-wrap: wrap; gap: 0.25rem 1rem; }
.site-footer nav ul li a { color: var(--text-muted); font-size: 0.9rem; }
.site-footer nav ul li a:hover { color: var(--accent); opacity: 1; }

.footer-credits { text-align: right; }
.footer-credits p { font-size: 0.8rem; color: var(--text-muted); line-height: 1.9; }

.footer-bottom {
  text-align: center; font-size: 0.8rem; color: var(--text-muted);
  padding-top: 1.5rem; border-top: 1px solid var(--border);
}

/* ============================================================
   MOBILE — NAV BURGER (CSS-only)
   ============================================================ */
@media (max-width: 768px) {
  .burger { display: flex; }

  .nav-links {
    position: fixed; top: 0; right: -100%; bottom: 0;
    width: min(280px, 80vw);
    background: rgba(5, 22, 40, 0.97);
    backdrop-filter: blur(16px);
    flex-direction: column; justify-content: center; align-items: center;
    gap: 0.5rem;
    transition: right 0.3s ease;
    border-left: 1px solid var(--border);
    z-index: 200;
  }

  .nav-toggle:checked ~ header .nav-links { right: 0; }
  .nav-toggle:checked ~ header .burger span:nth-child(1) { transform: rotate(45deg) translate(5px, 5px); }
  .nav-toggle:checked ~ header .burger span:nth-child(2) { opacity: 0; }
  .nav-toggle:checked ~ header .burger span:nth-child(3) { transform: rotate(-45deg) translate(5px, -5px); }

  .nav-links a { font-size: 1.1rem; padding: 0.6rem 1.25rem; }

  /* Grids → single column */
  .features-grid,
  .screenshots-grid { grid-template-columns: 1fr; }

  .download-cards { grid-template-columns: 1fr; }

  .selfhost-steps { flex-direction: column; gap: 1.5rem; }
  .selfhost-links { flex-direction: row; flex-wrap: wrap; }

  .footer-grid { grid-template-columns: 1fr; text-align: center; }
  .footer-credits { text-align: center; }
  .server-address { flex-wrap: wrap; justify-content: center; }
}

@media (max-width: 480px) {
  .hero-actions { flex-direction: column; align-items: center; }
  .hero-actions .btn { width: 100%; max-width: 320px; justify-content: center; }
  section { padding: 3.5rem 0; }
}