/* ============================================================
   ASTRO VERSE – Stylesheet  v2.0
   ============================================================ */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --bg:        #030712;
  --bg-dark:   #050d1e;
  --primary:   #00d4ff;
  --accent:    #7b2fff;
  --orange:    #ff6b35;
  --gold:      #ffd700;
  --green:     #22d65a;
  --text:      #dde6f4;
  --text-muted:#7a8a9e;
  --card-bg:   rgba(12,24,50,0.55);
  --card-border:rgba(0,212,255,0.13);
  --font-head: 'Orbitron', sans-serif;
  --font-body: 'Exo 2', sans-serif;
  --radius:    14px;
  --tr:        0.3s ease;
  --glow-c:    0 0 40px rgba(0,212,255,0.18);
}

html { scroll-behavior: smooth; }
body { background: var(--bg); color: var(--text); font-family: var(--font-body); font-size: 1rem; line-height: 1.7; overflow-x: hidden; }

/* ---------- Nebula bg on dark sections ---------- */
.section-dark {
  position: relative;
  z-index: 1;
}
.section-dark::before {
  content: '';
  position: absolute; inset: 0; z-index: 0;
  background: radial-gradient(ellipse 80% 60% at 20% 40%, rgba(123,47,255,0.06) 0%, transparent 70%),
              radial-gradient(ellipse 60% 50% at 80% 70%, rgba(0,212,255,0.05) 0%, transparent 70%);
  pointer-events: none;
}
.section-dark > * { position: relative; z-index: 1; }

/* Starfield */
#starfield { position: fixed; top:0; left:0; width:100%; height:100%; z-index:0; pointer-events:none; }

/* ============================================================ SECTIONS */
.section { position: relative; z-index: 1; padding: 100px 5vw; }

.section-header { text-align: center; margin-bottom: 60px; }

.section-tag {
  display: inline-block; font-family: var(--font-head); font-size: 0.72rem;
  letter-spacing: 4px; color: var(--primary); border: 1px solid var(--primary);
  padding: 4px 14px; border-radius: 100px; margin-bottom: 16px; opacity: 0.8;
}

.section-header h2 {
  font-family: var(--font-head); font-size: clamp(1.8rem,4vw,3rem); font-weight: 900;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text;
  margin-bottom: 12px;
}
.section-header p { color: var(--text-muted); font-size: 1.05rem; }

/* ============================================================ NAVBAR */
#navbar {
  position: fixed; top:0; left:0; right:0; z-index:1000;
  display: flex; align-items: center; justify-content: space-between;
  padding: 14px 5vw;
  background: rgba(3,7,18,0.75);
  backdrop-filter: blur(20px) saturate(1.8);
  border-bottom: 1px solid rgba(0,212,255,0.08);
  transition: var(--tr);
}
#navbar.scrolled { padding: 10px 5vw; background: rgba(3,7,18,0.97); }

.nav-logo { font-family: var(--font-head); font-size: 1.2rem; font-weight: 700; color: var(--primary); letter-spacing: 2px; }

.nav-links { display: flex; gap: 4px; list-style: none; flex-wrap: wrap; }
.nav-links a {
  color: var(--text-muted); text-decoration: none; font-size: 0.78rem;
  padding: 6px 11px; border-radius: 6px; transition: var(--tr);
  font-family: var(--font-head); letter-spacing: 0.5px;
}
.nav-links a:hover, .nav-links a.active-link { color: var(--primary); background: rgba(0,212,255,0.09); }
.nav-toggle { display: none; background: none; border: none; color: var(--primary); font-size: 1.6rem; cursor: pointer; }

/* ============================================================ HERO */
#hero {
  position: relative; z-index: 1; min-height: 100vh;
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  text-align: center; padding: 0 5vw;
  background: radial-gradient(ellipse 100% 80% at 50% 60%, rgba(0,212,255,0.04) 0%, transparent 70%);
}
.hero-content { animation: fadeUp 1.2s ease forwards; }
.hero-title {
  font-family: var(--font-head); font-size: clamp(3rem,10vw,8rem); font-weight: 900;
  line-height: 1; color: #fff; letter-spacing: 8px;
  text-shadow: 0 0 100px rgba(0,212,255,0.25);
}
.hero-title span { color: var(--primary); text-shadow: 0 0 50px var(--primary), 0 0 100px rgba(0,212,255,0.4); }
.hero-sub { margin: 20px auto 40px; font-size: clamp(1rem,2.5vw,1.25rem); color: var(--text-muted); max-width: 600px; letter-spacing: 1px; }

.btn-primary {
  display: inline-block;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  color: #fff; font-family: var(--font-head); font-size: 0.88rem; letter-spacing: 2px;
  padding: 15px 38px; border: none; border-radius: 100px; cursor: pointer;
  text-decoration: none; transition: var(--tr);
  box-shadow: 0 0 40px rgba(0,212,255,0.2), 0 4px 24px rgba(0,0,0,0.4);
}
.btn-primary:hover { transform: translateY(-3px); box-shadow: 0 0 60px rgba(0,212,255,0.45), 0 8px 32px rgba(0,0,0,0.5); }

.scroll-indicator { position: absolute; bottom: 36px; display: flex; flex-direction: column; align-items: center; gap: 5px; }
.scroll-indicator span { display: block; width: 2px; height: 14px; background: var(--primary); border-radius: 2px; animation: scrollBounce 1.5s infinite; }
.scroll-indicator span:nth-child(2) { animation-delay: 0.2s; opacity: 0.7; }
.scroll-indicator span:nth-child(3) { animation-delay: 0.4s; opacity: 0.4; }
@keyframes scrollBounce { 0%,100% { transform: scaleY(1); } 50% { transform: scaleY(2); } }

/* ============================================================ NUMERI COSMICI */
.counters-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 20px;
}
.counter-card {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: var(--radius);
  padding: 30px 24px;
  text-align: center;
  backdrop-filter: blur(10px);
  transition: var(--tr);
  opacity: 0; transform: translateY(24px);
}
.counter-card.visible { opacity: 1; transform: none; }
.counter-card:hover { border-color: var(--primary); box-shadow: var(--glow-c); transform: translateY(-4px); }
.cc-icon { font-size: 2.2rem; margin-bottom: 12px; display: block; }
.cc-num {
  display: block; font-family: var(--font-head); font-size: 1.8rem; font-weight: 900;
  color: var(--primary); margin-bottom: 8px; min-height: 2.2rem;
  background: linear-gradient(135deg, var(--primary), #fff); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text;
}
.cc-label { font-size: 0.82rem; color: var(--text-muted); letter-spacing: 1px; text-transform: uppercase; }

/* ============================================================ CARDS GRID */
.cards-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px,1fr)); gap: 24px; }

.card {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: var(--radius);
  padding: 30px 26px;
  backdrop-filter: blur(10px);
  transition: var(--tr);
  opacity: 0; transform: translateY(28px);
}
.card.visible { opacity: 1; transform: none; }
.card:hover { border-color: var(--primary); box-shadow: var(--glow-c), 0 8px 40px rgba(0,0,0,0.4); transform: translateY(-5px); }
.card-icon { font-size: 2.4rem; margin-bottom: 16px; }
.card h3 { font-family: var(--font-head); font-size: 0.92rem; color: var(--primary); margin-bottom: 12px; letter-spacing: 1px; }
.card p { color: var(--text-muted); font-size: 0.93rem; }

/* ============================================================ TWO-COL */
.two-col { display: grid; grid-template-columns: 1fr 1fr; gap: 60px; align-items: start; }
@media (max-width:900px) { .two-col { grid-template-columns: 1fr; gap: 40px; } }
.text-block h3 { font-family: var(--font-head); font-size: 0.92rem; color: var(--primary); margin-bottom: 10px; letter-spacing: 1px; }
.text-block p { color: var(--text-muted); margin-bottom: 14px; }

/* ============================================================ FORMULA BOX */
.formula-box {
  background: rgba(0,212,255,0.06); border-left: 3px solid var(--primary);
  border-radius: 0 10px 10px 0; padding: 16px 24px;
  font-family: 'Courier New', monospace; font-size: 1.15rem; color: var(--primary);
  margin: 16px 0; letter-spacing: 1px; text-align: center;
  box-shadow: inset 0 0 20px rgba(0,212,255,0.04);
}

/* ============================================================ INFO STRIP */
.info-strip {
  display: flex; justify-content: space-around; flex-wrap: wrap; gap: 20px;
  margin-top: 60px; padding: 36px 40px;
  background: rgba(0,212,255,0.04); border: 1px solid var(--card-border); border-radius: var(--radius);
}
.info-item { text-align: center; }
.info-num { display: block; font-family: var(--font-head); font-size: 2.4rem; font-weight: 900; color: var(--primary); }
.info-label { font-size: 0.83rem; color: var(--text-muted); }

/* ============================================================ GRAVITY CANVAS */
#gravityCanvas { width: 100%; max-width: 400px; border-radius: var(--radius); background: rgba(0,0,0,0.3); border: 1px solid var(--card-border); }
.visual-block { display: flex; flex-direction: column; align-items: center; gap: 12px; }
.caption { font-size: 0.78rem; color: var(--text-muted); text-align: center; font-style: italic; }

/* ============================================================ TABS */
.tabs-container { max-width: 1100px; margin: 0 auto; }
.tabs-buttons { display: flex; gap: 12px; margin-bottom: 36px; flex-wrap: wrap; }
.tab-btn {
  background: var(--card-bg); border: 1px solid var(--card-border);
  color: var(--text-muted); font-family: var(--font-head); font-size: 0.78rem;
  letter-spacing: 1px; padding: 12px 28px; border-radius: 100px; cursor: pointer; transition: var(--tr);
  backdrop-filter: blur(8px);
}
.tab-btn.active, .tab-btn:hover { background: linear-gradient(135deg,var(--primary),var(--accent)); border-color: transparent; color: #fff; }
.tab-content { display: none; }
.tab-content.active { display: block; }

/* ============================================================ STYLED LIST */
.styled-list { list-style: none; padding: 0; }
.styled-list li { position: relative; padding-left: 24px; color: var(--text-muted); margin-bottom: 10px; }
.styled-list li::before { content: '▸'; position: absolute; left: 0; color: var(--primary); }

/* ============================================================ BLACK HOLE */
.bh-container { display: grid; grid-template-columns: 1fr 1fr; gap: 60px; align-items: center; }
@media (max-width:900px) { .bh-container { grid-template-columns: 1fr; } }
.bh-visual { display: flex; flex-direction: column; align-items: center; gap: 20px; }
.black-hole-anim { position: relative; width: 300px; height: 300px; display: flex; align-items: center; justify-content: center; }
.bh-core { position: absolute; width: 80px; height: 80px; border-radius: 50%; background: radial-gradient(circle, #1a0030, #000); box-shadow: 0 0 40px 20px #000, 0 0 0 4px var(--accent); z-index: 3; }
.bh-ring { position: absolute; border-radius: 50%; border: 2px solid transparent; animation: rotateRing 6s linear infinite; }
.ring1 { width:160px; height:50px; border-color:#ff9a00; box-shadow:0 0 15px #ff9a00; animation-duration:3s; }
.ring2 { width:220px; height:70px; border-color:rgba(255,154,0,0.5); box-shadow:0 0 10px rgba(255,154,0,0.4); animation-duration:5s; animation-direction:reverse; }
.ring3 { width:280px; height:90px; border-color:rgba(255,100,0,0.3); animation-duration:8s; }
.bh-glow { position:absolute; width:160px; height:160px; border-radius:50%; background:radial-gradient(circle,rgba(123,47,255,0.2) 0%,transparent 70%); animation:bhGlow 3s ease-in-out infinite; }
@keyframes rotateRing { from{transform:rotateX(75deg) rotateZ(0)} to{transform:rotateX(75deg) rotateZ(360deg)} }
@keyframes bhGlow { 0%,100%{opacity:.5;transform:scale(1)} 50%{opacity:1;transform:scale(1.15)} }
.bh-info h3 { font-family:var(--font-head); font-size:.92rem; color:var(--primary); margin:20px 0 8px; letter-spacing:1px; }
.bh-info h3:first-child { margin-top:0; }
.bh-info p { color:var(--text-muted); font-size:.93rem; }
.bh-types { display:flex; gap:16px; margin-top:12px; flex-wrap:wrap; }
.bh-type { flex:1; min-width:100px; background:rgba(123,47,255,0.1); border:1px solid rgba(123,47,255,0.3); border-radius:var(--radius); padding:14px; text-align:center; font-size:.83rem; }
.bh-type-icon { font-size:1.5rem; display:block; margin-bottom:6px; }
.bh-type strong { display:block; color:var(--accent); }
.bh-type small { color:var(--text-muted); }

/* ============================================================ SOLAR SYSTEM CANVAS */
.solar-wrapper {
  display: grid; grid-template-columns: 1fr 360px; gap: 24px;
  margin-bottom: 24px; align-items: start;
}
@media (max-width:1000px) { .solar-wrapper { grid-template-columns: 1fr; } }

.solar-canvas-container {
  position: relative; width: 100%; border-radius: var(--radius);
  overflow: hidden; background: rgba(2,6,18,0.7);
  border: 1px solid var(--card-border);
  box-shadow: var(--glow-c), 0 20px 60px rgba(0,0,0,0.5);
}

#solarCanvas { display: block; width: 100%; height: auto; cursor: default; }

.solar-tooltip {
  position: absolute; top: 0; left: 0; pointer-events: none;
  background: rgba(0,20,50,0.9); border: 1px solid var(--primary);
  color: var(--primary); font-family: var(--font-head); font-size: 0.75rem;
  letter-spacing: 1px; padding: 5px 12px; border-radius: 6px;
  opacity: 0; transition: opacity 0.15s; backdrop-filter: blur(6px);
  white-space: nowrap; z-index: 10;
}

/* Planet Panel */
.planet-panel {
  background: var(--card-bg); border: 1px solid var(--card-border);
  border-radius: var(--radius); backdrop-filter: blur(16px);
  min-height: 300px; overflow-y: auto; max-height: 480px;
}

.pp-default { padding: 32px 24px; text-align: center; }
.pp-sun-icon { font-size: 3rem; display: block; margin: 0 auto 16px; filter: drop-shadow(0 0 16px #ffd700); animation: ppSunSpin 12s linear infinite; }
@keyframes ppSunSpin { from{filter:drop-shadow(0 0 12px #ffd700)} 50%{filter:drop-shadow(0 0 28px #ff8c00)} to{filter:drop-shadow(0 0 12px #ffd700)} }
.pp-default h3 { font-family:var(--font-head); font-size:1rem; color:var(--primary); margin-bottom:12px; }
.pp-default p { color:var(--text-muted); font-size:.9rem; line-height:1.6; }
.pp-facts-row { display:flex; gap:12px; justify-content:center; margin:20px 0; flex-wrap:wrap; }
.pp-fr { background:rgba(0,212,255,0.08); border:1px solid var(--card-border); border-radius:10px; padding:12px 16px; text-align:center; min-width:80px; }
.pp-fr span { display:block; font-family:var(--font-head); font-size:1.1rem; color:var(--primary); }
.pp-fr small { font-size:.75rem; color:var(--text-muted); }
.pp-cta { color:var(--primary); font-size:.85rem; font-family:var(--font-head); letter-spacing:1px; margin-top:16px; opacity:.7; }

.pp-content { padding: 20px; }
.pp-top { display:flex; justify-content:space-between; align-items:flex-start; margin-bottom:16px; }
.pp-name { font-family:var(--font-head); font-size:1.3rem; font-weight:900; color:var(--primary); letter-spacing:2px; }
.pp-type-badge { display:inline-block; background:rgba(123,47,255,0.2); border:1px solid rgba(123,47,255,0.4); color:#c0a0ff; font-size:.72rem; padding:3px 10px; border-radius:100px; margin-top:4px; font-family:var(--font-head); letter-spacing:.5px; }
.pp-close { background:rgba(255,255,255,0.08); border:1px solid rgba(255,255,255,0.1); color:var(--text-muted); width:28px; height:28px; border-radius:50%; cursor:pointer; font-size:.9rem; transition:var(--tr); flex-shrink:0; }
.pp-close:hover { background:rgba(255,80,80,0.2); color:#ff8080; }
.pp-grid { display:grid; grid-template-columns:1fr 1fr; gap:8px; margin-bottom:16px; }
.pp-s { background:rgba(0,212,255,0.04); border:1px solid rgba(0,212,255,0.08); border-radius:8px; padding:8px 12px; }
.pp-sl { display:block; font-size:.7rem; color:var(--text-muted); text-transform:uppercase; letter-spacing:.5px; margin-bottom:3px; }
.pp-sv { display:block; font-size:.88rem; color:var(--text); font-weight:600; }
.pp-gbar { margin-bottom:16px; }
.pp-gb-label { font-size:.8rem; color:var(--text-muted); margin-bottom:6px; }
.pp-gb-label strong { color:var(--primary); }
.pp-gb-track { background:rgba(255,255,255,0.07); border-radius:100px; height:6px; overflow:hidden; }
.pp-gb-fill { height:100%; background:linear-gradient(90deg,var(--primary),var(--accent)); border-radius:100px; transition:width .6s ease; }
.pp-facts h4 { font-family:var(--font-head); font-size:.8rem; color:var(--accent); margin-bottom:10px; letter-spacing:1px; }
.pp-facts ul { list-style:none; padding:0; }
.pp-facts li { color:var(--text-muted); font-size:.84rem; padding-left:16px; position:relative; margin-bottom:8px; line-height:1.5; }
.pp-facts li::before { content:'▸'; position:absolute; left:0; color:var(--primary); font-size:.7rem; top:3px; }

/* Solar Controls */
.solar-controls {
  display: flex; gap: 20px; align-items: center; flex-wrap: wrap;
  padding: 16px 20px; background: var(--card-bg); border: 1px solid var(--card-border);
  border-radius: var(--radius); margin-bottom: 40px; backdrop-filter: blur(10px);
}
.ctrl-btn {
  display: flex; align-items: center; gap: 8px;
  background: rgba(0,212,255,0.1); border: 1px solid rgba(0,212,255,0.3);
  color: var(--primary); font-family: var(--font-head); font-size: .78rem; letter-spacing: 1px;
  padding: 10px 20px; border-radius: 100px; cursor: pointer; transition: var(--tr); white-space: nowrap;
}
.ctrl-btn:hover { background: rgba(0,212,255,0.2); }
.speed-control { display:flex; align-items:center; gap:10px; flex:1; min-width:200px; }
.speed-val { font-family:var(--font-head); font-size:.85rem; color:var(--primary); min-width:36px; }
#speedSlider { flex:1; appearance:none; height:4px; background:rgba(0,212,255,0.2); border-radius:2px; outline:none; cursor:pointer; }
#speedSlider::-webkit-slider-thumb { appearance:none; width:16px; height:16px; background:var(--primary); border-radius:50%; box-shadow:0 0 8px var(--primary); }
.name-toggle { display:flex; align-items:center; gap:10px; cursor:pointer; font-size:.85rem; color:var(--text-muted); white-space:nowrap; }
.name-toggle input { display:none; }
.toggle-box { width:38px; height:20px; background:rgba(255,255,255,0.1); border:1px solid rgba(0,212,255,0.3); border-radius:100px; position:relative; transition:var(--tr); }
.toggle-box::after { content:''; position:absolute; left:2px; top:2px; width:14px; height:14px; background:var(--text-muted); border-radius:50%; transition:var(--tr); }
.name-toggle input:checked + .toggle-box { background:rgba(0,212,255,0.25); border-color:var(--primary); }
.name-toggle input:checked + .toggle-box::after { left:20px; background:var(--primary); }

/* ============================================================ WEIGHT CALCULATOR */
.weight-calc-section {
  background: var(--card-bg); border: 1px solid var(--card-border);
  border-radius: var(--radius); padding: 40px; margin-top: 20px; backdrop-filter: blur(12px);
}
.wc-header { text-align:center; margin-bottom:28px; }
.wc-header h3 { font-family:var(--font-head); font-size:1.3rem; background:linear-gradient(135deg,var(--primary),var(--accent)); -webkit-background-clip:text; -webkit-text-fill-color:transparent; background-clip:text; margin-bottom:8px; }
.wc-header p { color:var(--text-muted); font-size:.93rem; }
.weight-input-row { display:flex; gap:14px; justify-content:center; margin-bottom:28px; flex-wrap:wrap; }
.weight-inp-wrap { position:relative; display:flex; align-items:center; }
.weight-inp-wrap input {
  background:rgba(0,212,255,0.06); border:1px solid rgba(0,212,255,0.25);
  border-radius:12px; color:var(--text); font-family:var(--font-body); font-size:1rem;
  padding:13px 50px 13px 18px; outline:none; width:240px; transition:var(--tr);
}
.weight-inp-wrap input:focus { border-color:var(--primary); box-shadow:0 0 0 3px rgba(0,212,255,0.1); }
.inp-unit { position:absolute; right:14px; color:var(--text-muted); font-size:.88rem; pointer-events:none; }
.wr-grid { display:grid; grid-template-columns:repeat(auto-fill,minmax(150px,1fr)); gap:14px; margin-bottom:20px; }
.wr-card { background:rgba(0,212,255,0.04); border:1px solid var(--card-border); border-radius:12px; padding:16px 14px; text-align:center; transition:var(--tr); }
.wr-card:hover { border-color:var(--primary); transform:translateY(-3px); }
.wr-name { font-size:.83rem; color:var(--text-muted); margin-bottom:8px; }
.wr-weight { font-family:var(--font-head); font-size:1.4rem; color:var(--primary); }
.wr-weight span { font-size:.75rem; }
.wr-kgf { font-size:.75rem; color:var(--text-muted); margin-bottom:8px; }
.wr-bar-wrap { background:rgba(255,255,255,0.05); border-radius:100px; height:4px; overflow:hidden; margin-bottom:6px; }
.wr-bar { height:100%; border-radius:100px; }
.wr-gval { font-size:.72rem; color:var(--text-muted); }
.wr-note { text-align:center; font-size:.85rem; color:var(--text-muted); padding:14px; background:rgba(0,212,255,0.05); border-radius:10px; }

/* ============================================================ STELLE */
.lifecycle { display:flex; align-items:center; flex-wrap:wrap; gap:8px; margin:16px 0; }
.lc-step { text-align:center; font-size:1.5rem; line-height:1.3; }
.lc-arrow { color:var(--primary); font-size:1.2rem; }
.star-classes { display:flex; gap:6px; flex-wrap:wrap; margin-top:16px; }
.sc { border-radius:8px; padding:10px 12px; font-family:var(--font-head); font-size:.95rem; font-weight:700; color:#fff; text-align:center; line-height:1.4; min-width:50px; }
.sc small { display:block; font-family:var(--font-body); font-size:.58rem; font-weight:300; opacity:.85; }
.galaxy-types { display:grid; grid-template-columns:1fr 1fr 1fr; gap:14px; margin-top:12px; }
.gal-card { background:var(--card-bg); border:1px solid var(--card-border); border-radius:var(--radius); padding:18px 12px; text-align:center; transition:var(--tr); backdrop-filter:blur(8px); }
.gal-card:hover { border-color:var(--accent); }
.gal-icon { font-size:2rem; margin-bottom:8px; }
.gal-card h4 { font-family:var(--font-head); font-size:.78rem; color:var(--accent); margin-bottom:8px; }
.gal-card p { font-size:.82rem; color:var(--text-muted); }

/* ============================================================ ESOPIANETI */
.exo-grid { display:grid; grid-template-columns:repeat(auto-fill,minmax(280px,1fr)); gap:24px; margin-top:20px; }
.exo-card {
  background:var(--card-bg); border:1px solid var(--card-border); border-radius:var(--radius);
  padding:28px 24px; backdrop-filter:blur(10px); transition:var(--tr);
  opacity:0; transform:translateY(24px);
}
.exo-card.visible { opacity:1; transform:none; }
.exo-card:hover { border-color:var(--accent); box-shadow:0 0 30px rgba(123,47,255,0.15), 0 8px 40px rgba(0,0,0,0.4); transform:translateY(-4px); }
.exo-card-header { display:flex; justify-content:space-between; align-items:flex-start; margin-bottom:14px; }
.exo-name { font-family:var(--font-head); font-size:1rem; color:var(--accent); }
.exo-badge { background:rgba(0,212,255,0.1); border:1px solid rgba(0,212,255,0.25); color:var(--primary); font-size:.68rem; padding:3px 10px; border-radius:100px; font-family:var(--font-head); }
.exo-card p { color:var(--text-muted); font-size:.9rem; line-height:1.6; margin-bottom:12px; }
.exo-stats { display:flex; gap:12px; flex-wrap:wrap; }
.exo-stat { background:rgba(123,47,255,0.08); border:1px solid rgba(123,47,255,0.2); border-radius:8px; padding:6px 12px; font-size:.78rem; color:var(--text-muted); }
.exo-stat strong { color:#c0a0ff; }

.hz-diagram { margin-top:50px; text-align:center; }
.hz-diagram h3 { font-family:var(--font-head); font-size:1rem; color:var(--primary); margin-bottom:20px; }
.hz-bar { position:relative; height:40px; background:linear-gradient(90deg,#ff3300 0%,#ff8800 20%,#22dd44 35%,#22dd44 55%,#0088ff 70%,#002266 100%); border-radius:100px; max-width:700px; margin:0 auto 16px; overflow:visible; }
.hz-label { display:flex; justify-content:space-between; max-width:700px; margin:0 auto; font-size:.78rem; color:var(--text-muted); }
.hz-earth { position:absolute; left:42%; top:50%; transform:translate(-50%,-50%); font-size:1.2rem; filter:drop-shadow(0 0 8px #40a0ff); }

/* ============================================================ TIMELINE */
.timeline { position:relative; max-width:900px; margin:0 auto; padding:0 20px; }
.timeline::before { content:''; position:absolute; left:50%; top:0; bottom:0; width:2px; background:linear-gradient(to bottom,var(--primary),var(--accent)); transform:translateX(-50%); }
.tl-item { display:flex; justify-content:flex-end; padding-right:calc(50% + 40px); margin-bottom:50px; opacity:0; transform:translateX(-30px); transition:all .6s ease; }
.tl-item.right { justify-content:flex-start; padding-right:0; padding-left:calc(50% + 40px); transform:translateX(30px); }
.tl-item.visible { opacity:1; transform:translateX(0); }
.tl-content { background:var(--card-bg); border:1px solid var(--card-border); border-radius:var(--radius); padding:24px 20px; max-width:380px; position:relative; backdrop-filter:blur(8px); }
.tl-content::after { content:''; position:absolute; right:-42px; top:24px; width:14px; height:14px; border-radius:50%; background:var(--primary); border:3px solid var(--bg); box-shadow:0 0 12px var(--primary); }
.tl-item.right .tl-content::after { right:auto; left:-42px; }
.tl-content h4 { font-family:var(--font-head); font-size:.92rem; color:var(--primary); margin-bottom:6px; }
.tl-time { display:block; font-size:.73rem; color:var(--orange); margin-bottom:10px; font-style:italic; }
.tl-content p { color:var(--text-muted); font-size:.88rem; }

/* ============================================================ DARK ENERGY */
.dark-energy-visual { display:flex; gap:50px; align-items:center; flex-wrap:wrap; justify-content:center; }
.pie-chart-container { display:flex; flex-direction:column; align-items:center; gap:20px; }
.pie-legend { list-style:none; }
.legend-item { display:flex; align-items:center; gap:10px; margin-bottom:8px; font-size:.88rem; color:var(--text-muted); }
.legend-item span { display:block; width:16px; height:16px; border-radius:4px; flex-shrink:0; }
.dark-texts { display:flex; flex-direction:column; gap:22px; max-width:580px; }
.dark-card { background:var(--card-bg); border:1px solid var(--card-border); border-radius:var(--radius); padding:26px 22px; opacity:0; transform:translateY(20px); transition:all .6s ease; backdrop-filter:blur(10px); }
.dark-card.visible { opacity:1; transform:none; }
.dark-card h3 { font-family:var(--font-head); font-size:.92rem; color:var(--primary); margin-bottom:12px; letter-spacing:1px; }
.dark-card p { color:var(--text-muted); }

/* ============================================================ WAVE */
.wave-visual { display:flex; flex-direction:column; align-items:center; gap:16px; }
#waveCanvas { width:100%; max-width:420px; border-radius:var(--radius); background:rgba(0,0,0,0.4); border:1px solid var(--card-border); }
.gw-stats { display:flex; gap:24px; flex-wrap:wrap; justify-content:center; }
.gw-stat { text-align:center; }
.gw-stat span { display:block; font-family:var(--font-head); font-size:1.15rem; color:var(--primary); }
.gw-stat small { font-size:.73rem; color:var(--text-muted); }

/* ============================================================ QUIZ */
.quiz-container { max-width:720px; margin:0 auto; }
#quiz-box { background:var(--card-bg); border:1px solid var(--card-border); border-radius:20px; padding:40px; backdrop-filter:blur(12px); }
#quiz-progress { background:rgba(255,255,255,0.06); border-radius:100px; height:6px; margin-bottom:20px; overflow:hidden; }
#quiz-bar { height:100%; background:linear-gradient(90deg,var(--primary),var(--accent)); border-radius:100px; width:10%; transition:width .5s ease; }
#quiz-counter { font-size:.78rem; color:var(--text-muted); font-family:var(--font-head); letter-spacing:1px; margin-bottom:20px; }
#quiz-question { font-family:var(--font-head); font-size:1.05rem; color:var(--text); margin-bottom:26px; line-height:1.6; }
#quiz-options { display:flex; flex-direction:column; gap:11px; margin-bottom:20px; }
.quiz-option { background:rgba(255,255,255,0.04); border:1px solid rgba(255,255,255,0.1); border-radius:10px; padding:13px 18px; cursor:pointer; transition:var(--tr); color:var(--text); font-size:.92rem; text-align:left; font-family:var(--font-body); }
.quiz-option:hover { border-color:var(--primary); background:rgba(0,212,255,0.07); }
.quiz-option.correct { border-color:#22c55e; background:rgba(34,197,94,0.12); color:#22c55e; }
.quiz-option.wrong   { border-color:#ef4444; background:rgba(239,68,68,0.12); color:#ef4444; }
.quiz-option:disabled { cursor:default; }
#quiz-feedback { padding:13px 18px; border-radius:10px; font-size:.88rem; margin-bottom:18px; }
#quiz-feedback.correct-fb { background:rgba(34,197,94,0.1); color:#22c55e; border:1px solid #22c55e; }
#quiz-feedback.wrong-fb   { background:rgba(239,68,68,0.1);  color:#ef4444;  border:1px solid #ef4444; }
.hidden { display:none !important; }
#quiz-result { background:var(--card-bg); border:1px solid var(--card-border); border-radius:20px; padding:60px 40px; text-align:center; backdrop-filter:blur(12px); }
.result-icon { font-size:4rem; margin-bottom:16px; }
#quiz-result h3 { font-family:var(--font-head); font-size:1.1rem; color:var(--text-muted); margin-bottom:10px; }
.result-score { font-family:var(--font-head); font-size:3rem; font-weight:900; color:var(--primary); margin-bottom:10px; }
#result-message { color:var(--text-muted); margin-bottom:28px; }

/* ============================================================ FOOTER */
#footer { position:relative; z-index:1; padding:60px 5vw 40px; border-top:1px solid rgba(0,212,255,0.08); background:rgba(3,7,18,0.9); }
.footer-content { text-align:center; }
.footer-logo { font-family:var(--font-head); font-size:1.5rem; color:var(--primary); letter-spacing:3px; margin-bottom:12px; }
.footer-content > p { color:var(--text-muted); font-size:.93rem; margin-bottom:22px; }
.footer-links { display:flex; justify-content:center; gap:20px; flex-wrap:wrap; margin-bottom:22px; }
.footer-links a { color:var(--text-muted); text-decoration:none; font-size:.88rem; transition:color .2s; }
.footer-links a:hover { color:var(--primary); }
.footer-copy { font-size:.78rem; color:rgba(136,146,164,0.45); margin-top: 6px; }
.footer-contact-wrap { text-align: center; margin: 14px 0; }

/* ============================================================ ANIMATIONS */
@keyframes fadeUp { from{opacity:0;transform:translateY(40px)} to{opacity:1;transform:translateY(0)} }
[data-aos] { opacity:0; transform:translateY(28px); transition:opacity .7s ease,transform .7s ease; }
[data-aos].visible { opacity:1; transform:none; }
.planet-card { background:var(--card-bg); border:1px solid var(--card-border); border-radius:var(--radius); padding:20px 16px; text-align:center; transition:var(--tr); opacity:0; transform:translateY(20px); backdrop-filter:blur(8px); }
.planet-card.visible { opacity:1; transform:none; }
.planet-card:hover { border-color:var(--gold); box-shadow:0 0 20px rgba(255,215,0,0.12); transform:translateY(-3px); }
.pc-icon { font-size:2rem; margin-bottom:8px; }
.planet-card h4 { font-family:var(--font-head); font-size:.82rem; color:var(--primary); margin-bottom:10px; }
.pc-stats { display:flex; flex-direction:column; gap:4px; }
.pc-stats span { font-size:.76rem; color:var(--text-muted); }

/* ============================================================ RESPONSIVE */
@media (max-width:768px) {
  .nav-links { display:none; flex-direction:column; position:absolute; top:100%; left:0; right:0; background:rgba(3,7,18,0.98); padding:20px; border-bottom:1px solid var(--card-border); gap:4px; z-index:999; }
  .nav-links.open { display:flex; }
  .nav-toggle { display:block; }
  .galaxy-types { grid-template-columns:1fr; }
  .pp-grid { grid-template-columns:1fr; }
  #quiz-box { padding:24px; }
  .dark-energy-visual { flex-direction:column; }
  .bh-types { flex-direction:column; }
  .timeline::before { left:20px; }
  .tl-item, .tl-item.right { justify-content:flex-start; padding:0 0 0 55px; transform:translateX(0); }
  .tl-content::after, .tl-item.right .tl-content::after { left:-38px; right:auto; }
  .solar-controls { flex-direction:column; align-items:stretch; }
  .weight-input-row { flex-direction:column; align-items:center; }
  .weight-inp-wrap input { width:100%; max-width:300px; }
}
@media (max-width:600px) {
  .section { padding:70px 4vw; }
  .hero-title { letter-spacing:3px; }
  .wr-grid { grid-template-columns:1fr 1fr; }
  .exo-grid { grid-template-columns:1fr; }
}
/* ============================================================
   AUTH MODAL  +  NAV AUTH  +  DONATE  +  RESPONSIVE v3
   ============================================================ */

/* ---- Nav Auth ---- */
.nav-auth { display:flex; align-items:center; gap:10px; flex-shrink:0; }
.nav-logo { text-decoration:none; }

.btn-auth {
  background: linear-gradient(135deg, var(--primary), var(--accent));
  border: none; color: #fff; font-family: var(--font-head); font-size: .75rem;
  letter-spacing: 1px; padding: 9px 18px; border-radius: 100px; cursor: pointer;
  transition: var(--tr); white-space: nowrap;
  box-shadow: 0 0 20px rgba(0,212,255,0.2);
}
.btn-auth:hover { transform: translateY(-2px); box-shadow: 0 0 30px rgba(0,212,255,0.4); }

.user-display {
  display: flex; align-items: center; gap: 8px;
  background: rgba(0,212,255,0.08); border: 1px solid rgba(0,212,255,0.2);
  border-radius: 100px; padding: 6px 12px;
}
.user-avatar {
  width: 28px; height: 28px; border-radius: 50%;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  display: flex; align-items: center; justify-content: center;
  font-size: .85rem; font-weight: 700; color: #fff;
  flex-shrink: 0; line-height: 1;
}
.user-name { font-family: var(--font-head); font-size: .75rem; color: var(--primary); max-width: 90px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.user-logout { background: none; border: none; color: var(--text-muted); cursor: pointer; font-size: 1rem; padding: 2px 4px; border-radius: 4px; transition: color .2s; }
.user-logout:hover { color: #ef4444; }

/* ---- Auth Modal ---- */
.modal-overlay {
  position: fixed; inset: 0; z-index: 9000;
  background: rgba(3,7,18,0.88); backdrop-filter: blur(10px) saturate(1.5);
  display: flex; align-items: center; justify-content: center;
  padding: 16px; overflow-y: auto;
}
.modal-overlay[hidden] { display: none; }

.modal-box {
  background: linear-gradient(145deg, rgba(10,20,45,0.98), rgba(6,13,31,0.98));
  border: 1px solid rgba(0,212,255,0.18); border-radius: 20px;
  padding: 36px 32px; width: 100%; max-width: 440px;
  position: relative; box-shadow: 0 0 80px rgba(0,212,255,0.12), 0 40px 80px rgba(0,0,0,0.6);
  animation: modalIn .25s ease;
}
@keyframes modalIn { from{opacity:0;transform:scale(.95) translateY(16px)} to{opacity:1;transform:none} }

.modal-close {
  position: absolute; top: 14px; right: 16px;
  background: rgba(255,255,255,0.06); border: 1px solid rgba(255,255,255,0.1);
  color: var(--text-muted); width: 32px; height: 32px; border-radius: 50%;
  cursor: pointer; font-size: 1rem; transition: var(--tr); display: flex; align-items: center; justify-content: center;
}
.modal-close:hover { background: rgba(239,68,68,0.2); color: #ef4444; }

.modal-header { text-align: center; margin-bottom: 24px; }
.modal-logo { font-size: 2rem; color: var(--primary); font-family: var(--font-head); font-weight: 900; letter-spacing: 2px; margin-bottom: 8px; }
.modal-title { font-family: var(--font-head); font-size: 1.3rem; color: #fff; margin-bottom: 6px; }
.modal-sub { font-size: .82rem; color: var(--text-muted); }

/* Auth Tabs */
.auth-tabs { display: flex; gap: 8px; margin-bottom: 24px; background: rgba(255,255,255,0.04); border-radius: 10px; padding: 4px; }
.auth-tab { flex: 1; background: none; border: none; color: var(--text-muted); font-family: var(--font-head); font-size: .78rem; letter-spacing: .5px; padding: 10px; border-radius: 8px; cursor: pointer; transition: var(--tr); }
.auth-tab.active { background: linear-gradient(135deg, var(--primary), var(--accent)); color: #fff; }

/* Auth Form */
.auth-form { display: flex; flex-direction: column; gap: 16px; }

.form-group { display: flex; flex-direction: column; gap: 6px; }
.form-group label { font-size: .82rem; color: var(--text-muted); font-weight: 600; letter-spacing: .3px; }
.form-group input[type="email"],
.form-group input[type="text"],
.form-group input[type="password"] {
  width: 100%; background: rgba(0,212,255,0.05); border: 1px solid rgba(0,212,255,0.2);
  border-radius: 10px; color: var(--text); font-family: var(--font-body); font-size: .95rem;
  padding: 12px 16px; outline: none; transition: var(--tr);
}
.form-group input:focus { border-color: var(--primary); box-shadow: 0 0 0 3px rgba(0,212,255,0.1); }
.form-group input:invalid:not(:placeholder-shown) { border-color: rgba(239,68,68,0.5); }

.pass-wrap { position: relative; }
.pass-wrap input { padding-right: 48px; }
.pass-toggle { position: absolute; right: 12px; top: 50%; transform: translateY(-50%); background: none; border: none; cursor: pointer; font-size: 1rem; opacity: .5; transition: opacity .2s; padding: 4px; }
.pass-toggle:hover { opacity: 1; }

.pass-strength { margin-top: 6px; }
.ps-bar { background: rgba(255,255,255,0.06); border-radius: 100px; height: 4px; overflow: hidden; margin-bottom: 4px; }
.ps-fill { height: 100%; border-radius: 100px; width: 0; transition: width .35s ease, background .35s ease; }
.ps-label { font-size: .72rem; color: var(--text-muted); }

.field-hint { font-size: .72rem; color: var(--text-muted); opacity: .7; }
.field-error { font-size: .75rem; color: #ef4444; min-height: 16px; }

.auth-error { background: rgba(239,68,68,0.1); border: 1px solid rgba(239,68,68,0.4); border-radius: 8px; padding: 10px 14px; font-size: .85rem; color: #fca5a5; }
.auth-success { background: rgba(34,197,94,0.1); border: 1px solid rgba(34,197,94,0.4); border-radius: 8px; padding: 10px 14px; font-size: .85rem; color: #86efac; }

.auth-submit { width: 100%; padding: 14px; font-size: .9rem; position: relative; }
.auth-submit:disabled { opacity: .6; cursor: not-allowed; }

.checkbox-label { display: flex; align-items: center; gap: 10px; cursor: pointer; font-size: .85rem; color: var(--text-muted); }
.checkbox-label input { display: none; }
.checkbox-box { width: 18px; height: 18px; border: 1px solid rgba(0,212,255,0.3); border-radius: 4px; flex-shrink: 0; position: relative; transition: var(--tr); background: rgba(0,212,255,0.05); }
.checkbox-label input:checked + .checkbox-box { background: var(--primary); border-color: var(--primary); }
.checkbox-label input:checked + .checkbox-box::after { content: '✓'; position: absolute; inset: 0; display: flex; align-items: center; justify-content: center; color: #000; font-size: .75rem; font-weight: 700; }

/* ---- User Profile Banner (appears on site when logged in) ---- */
.user-banner {
  position: fixed; bottom: 80px; left: 20px; z-index: 8000;
  background: var(--card-bg); border: 1px solid var(--card-border);
  border-radius: 14px; padding: 14px 18px; backdrop-filter: blur(12px);
  display: flex; gap: 14px; align-items: center;
  box-shadow: var(--glow-c), 0 8px 40px rgba(0,0,0,0.5);
  animation: slideInLeft .4s ease;
  max-width: 280px;
}
@keyframes slideInLeft { from{opacity:0;transform:translateX(-20px)} to{opacity:1;transform:none} }
.ub-avatar { width: 40px; height: 40px; border-radius: 50%; background: linear-gradient(135deg,var(--primary),var(--accent)); display: flex; align-items: center; justify-content: center; font-family: var(--font-head); font-weight: 900; font-size: 1.1rem; color: #fff; flex-shrink: 0; }
.ub-info { display: flex; flex-direction: column; gap: 2px; }
.ub-name { font-family: var(--font-head); font-size: .82rem; color: var(--primary); }
.ub-stats { font-size: .75rem; color: var(--text-muted); }
.ub-close { background: none; border: none; color: var(--text-muted); cursor: pointer; margin-left: auto; font-size: .9rem; align-self: flex-start; transition: color .2s; flex-shrink: 0; }
.ub-close:hover { color: #fff; }

/* ---- Donate FAB ---- */
.donate-fab {
  position: fixed; bottom: 24px; right: 24px; z-index: 7000;
  background: linear-gradient(135deg, #003087, #009cde);
  border-radius: 100px; display: flex; align-items: center; gap: 8px;
  padding: 12px 20px; color: #fff; text-decoration: none;
  font-family: var(--font-head); font-size: .78rem; letter-spacing: 1px;
  box-shadow: 0 4px 24px rgba(0,156,222,0.4), 0 8px 32px rgba(0,0,0,0.4);
  transition: var(--tr); white-space: nowrap;
}
.donate-fab:hover { transform: translateY(-3px); box-shadow: 0 6px 32px rgba(0,156,222,0.6), 0 12px 40px rgba(0,0,0,0.5); }
.donate-fab-icon { font-size: 1.1rem; }
@media (max-width:480px) { .donate-fab { padding: 12px 14px; } .donate-fab-label { display: none; } }

/* ---- Donate Section ---- */
.donate-section { padding: 80px 5vw; }
.donate-inner {
  display: grid; grid-template-columns: 1fr 1fr; gap: 60px; align-items: center;
  max-width: 1000px; margin: 0 auto;
}
@media (max-width:800px) { .donate-inner { grid-template-columns: 1fr; gap: 40px; } }
.donate-text h2 { font-family: var(--font-head); font-size: clamp(1.4rem,3vw,2rem); color: var(--primary); margin-bottom: 14px; }
.donate-text p { color: var(--text-muted); line-height: 1.7; margin-bottom: 16px; }
.donate-perks { list-style: none; padding: 0; }
.donate-perks li { color: var(--text-muted); font-size: .92rem; padding: 6px 0 6px 20px; position: relative; }
.donate-perks li::before { content: ''; position: absolute; left: 0; top: 50%; transform: translateY(-50%); width: 6px; height: 6px; background: var(--primary); border-radius: 50%; }
.donate-cta { display: flex; flex-direction: column; gap: 16px; align-items: center; }
.donate-amount-btns { display: flex; gap: 10px; flex-wrap: wrap; justify-content: center; }
.amt-btn {
  background: rgba(0,212,255,0.06); border: 1px solid rgba(0,212,255,0.2);
  color: var(--text-muted); font-family: var(--font-head); font-size: .78rem;
  padding: 10px 18px; border-radius: 100px; cursor: pointer; transition: var(--tr);
}
.amt-btn:hover, .amt-btn.active { background: rgba(0,212,255,0.15); border-color: var(--primary); color: var(--primary); }
.btn-donate {
  display: flex; align-items: center; gap: 10px;
  background: linear-gradient(135deg, #003087, #009cde);
  color: #fff; text-decoration: none; font-family: var(--font-head); font-size: .9rem;
  letter-spacing: 1px; padding: 15px 32px; border-radius: 100px;
  transition: var(--tr); box-shadow: 0 0 30px rgba(0,156,222,0.3);
  width: 100%; max-width: 280px; justify-content: center;
}
.btn-donate:hover { transform: translateY(-3px); box-shadow: 0 0 50px rgba(0,156,222,0.5); }
.donate-note { font-size: .78rem; color: var(--text-muted); text-align: center; }

/* ============================================================
   ENHANCED RESPONSIVE
   ============================================================ */
@media (max-width:768px) {
  .nav-auth { order: 3; }
  .nav-toggle { order: 2; }
  .nav-logo { order: 1; }
  #navbar { flex-wrap: wrap; }
  .nav-links { order: 4; width: 100%; }
  .user-name { display: none; }
  .planet-panel { max-height: 340px; }
}

@media (max-width:600px) {
  :root { font-size: 15px; }
  .section { padding: 60px 4vw; }
  .modal-box { padding: 24px 18px; }
  .cards-grid { grid-template-columns: 1fr; }
  .counters-grid { grid-template-columns: 1fr 1fr; }
  .solar-wrapper { grid-template-columns: 1fr; }
  .two-col { grid-template-columns: 1fr; gap: 32px; }
  .timeline::before { left: 16px; }
  .tl-item, .tl-item.right { padding: 0 0 0 44px; transform: none; }
  .tl-content::after, .tl-item.right .tl-content::after { left: -32px; top: 20px; width: 12px; height: 12px; }
  .info-strip { padding: 24px 16px; gap: 16px; }
  .info-num { font-size: 1.8rem; }
  .wr-grid { grid-template-columns: 1fr 1fr; }
  .exo-grid { grid-template-columns: 1fr; }
  .galaxy-types { grid-template-columns: 1fr; }
  .bh-container { grid-template-columns: 1fr; }
  .dark-energy-visual { flex-direction: column; gap: 24px; }
  .pp-grid { grid-template-columns: 1fr; }
  .solar-controls { flex-direction: column; align-items: stretch; gap: 12px; }
  .donate-inner { grid-template-columns: 1fr; }
  .footer-links { gap: 12px; }
  .hero-title { letter-spacing: 3px; }
}

@media (max-width:360px) {
  .counters-grid { grid-template-columns: 1fr; }
  .wr-grid { grid-template-columns: 1fr; }
  .amt-btn { padding: 8px 12px; font-size: .7rem; }
}

/* Touch target minimum */
@media (hover: none) {
  .quiz-option, .ctrl-btn, .tab-btn, .auth-tab, .amt-btn { min-height: 44px; }
  .planet:hover, .card:hover { transform: none; }
}

/* Print */
@media print {
  #starfield, .donate-fab, #authModal, .nav-auth { display: none !important; }
  body { background: #fff; color: #000; }
  .section { padding: 20px 0; }
}

/* ---- Utility ---- */
.hidden { display: none !important; }

/* ---- Planet Notes (aggiunto dal JS) ---- */
.pp-notes { padding-top: 16px; border-top: 1px solid rgba(255,255,255,0.08); margin-top: 16px; }
.pp-notes h4 { font-family: var(--font-head); font-size: .82rem; color: var(--text-muted); margin-bottom: 8px; letter-spacing: .5px; }
.pp-note-input {
  width: 100%; background: rgba(0,212,255,0.05); border: 1px solid rgba(0,212,255,0.2);
  border-radius: 8px; color: var(--text); font-family: var(--font-body); font-size: .88rem;
  padding: 10px 12px; resize: vertical; min-height: 80px; max-height: 180px;
  outline: none; transition: border-color .2s;
}
.pp-note-input:focus { border-color: var(--primary); }
.btn-save-note {
  margin-top: 8px; background: rgba(0,212,255,0.12); border: 1px solid rgba(0,212,255,0.3);
  border-radius: 8px; color: var(--primary); font-family: var(--font-head); font-size: .75rem;
  letter-spacing: .5px; padding: 8px 16px; cursor: pointer; transition: var(--tr);
}
.btn-save-note:hover { background: rgba(0,212,255,0.22); }

/* ============================================================
   RESPONSIVE COMPLETO v4
   ============================================================ */
#solarCanvas { touch-action: none; }
#gravityCanvas, #waveCanvas { touch-action: none; }

@media (max-width: 520px) {
  .black-hole-anim { width: 230px; height: 230px; }
  .bh-core { width: 62px; height: 62px; }
  .ring1 { width: 122px; height: 40px; }
  .ring2 { width: 168px; height: 54px; }
  .ring3 { width: 212px; height: 68px; }
  .bh-glow { width: 122px; height: 122px; }
  .planet-panel { max-height: 340px; border-radius: 14px 14px 0 0; }
  .pp-content { padding: 14px; }
  .weight-calc-section { padding: 24px 16px; }
  .wr-grid { grid-template-columns: 1fr 1fr; gap: 10px; }
  .wr-weight { font-size: 1.1rem; }
  .weight-inp-wrap input { width: 100%; max-width: 100%; }
  .weight-input-row { width: 100%; }
  #quiz-box { padding: 20px 16px; }
  #quiz-question { font-size: .95rem; }
  .quiz-option { padding: 11px 14px; font-size: .88rem; }
  #quiz-result { padding: 40px 20px; }
  .result-score { font-size: 2.2rem; }
  .exo-grid { grid-template-columns: 1fr; }
  .tabs-buttons { flex-direction: column; gap: 8px; }
  .tab-btn { padding: 10px 16px; font-size: .72rem; text-align: center; }
  .formula-box { font-size: .95rem; padding: 12px 14px; overflow-x: auto; white-space: nowrap; }
  .donate-section { padding: 50px 4vw; }
  .donate-amount-btns { gap: 8px; }
  .amt-btn { padding: 8px 14px; font-size: .73rem; }
  .btn-donate { padding: 13px 24px; font-size: .82rem; }
}

@media (max-width: 600px) {
  .info-strip { padding: 20px 12px; gap: 12px; }
  .info-num { font-size: 1.5rem; }
  .info-label { font-size: .73rem; }
  .info-item { min-width: 80px; }
}

@media (max-width: 480px) {
  .counters-grid { grid-template-columns: 1fr 1fr; gap: 12px; }
  .footer-links { gap: 10px 16px; }
  .footer-links a { font-size: .82rem; }
}

@media (max-width: 480px) {
  .nav-logo { font-size: 1rem; letter-spacing: 1px; }
}
@media (max-width: 400px) {
  .btn-auth { padding: 7px 12px; font-size: .68rem; letter-spacing: .5px; }
  .user-name { display: none; }
  .nav-logo { font-size: .88rem; letter-spacing: 0px; }
  #navbar { padding: 10px 3vw; }
  .hero-sub { font-size: .92rem; }
  .btn-primary { padding: 12px 28px; font-size: .8rem; }
}
@media (max-width: 360px) {
  .nav-logo { font-size: .8rem; }
  .btn-auth { padding: 6px 10px; font-size: .65rem; }
}

@media (max-width: 360px) {
  .counters-grid { grid-template-columns: 1fr; }
}

@media (max-width: 1000px) {
  .planet-panel { max-height: 420px; }
}

@media (min-width: 769px) and (max-width: 1000px) {
  .section { padding: 80px 4vw; }
  .solar-wrapper { grid-template-columns: 1fr; }
  .cards-grid { grid-template-columns: 1fr 1fr; }
  .counters-grid { grid-template-columns: repeat(3, 1fr); }
  .bh-container { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 900px) {
  .exo-grid { grid-template-columns: 1fr 1fr; }
  .galaxy-types { grid-template-columns: 1fr 1fr; }
}

@media (max-height: 500px) and (orientation: landscape) {
  #hero { min-height: auto; padding: 80px 5vw 60px; }
  .hero-title { font-size: clamp(2.5rem, 8vw, 5rem); }
  .section { padding: 60px 5vw; }
}

/* ---- Footer Contact ---- */
.footer-contact {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  margin: 18px 0 14px;
  padding: 11px 22px;
  background: rgba(0,212,255,0.07);
  border: 1px solid rgba(0,212,255,0.22);
  border-radius: 100px;
  backdrop-filter: blur(8px);
  transition: var(--tr);
}
.footer-contact:hover {
  background: rgba(0,212,255,0.12);
  border-color: rgba(0,212,255,0.4);
  box-shadow: 0 0 20px rgba(0,212,255,0.15);
}
.footer-favicon {
  width: 20px;
  height: 20px;
  flex-shrink: 0;
  filter: drop-shadow(0 0 5px rgba(0,212,255,0.6));
}
.footer-email {
  color: var(--primary);
  text-decoration: none;
  font-family: var(--font-head);
  font-size: .78rem;
  letter-spacing: .5px;
  transition: var(--tr);
}
.footer-email:hover {
  color: #fff;
  text-shadow: 0 0 10px var(--primary);
}

/* ============================================================ STELLE NOTEVOLI */
.stars-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(290px, 1fr));
  gap: 22px;
}
.star-card {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: var(--radius);
  padding: 24px 22px;
  backdrop-filter: blur(10px);
  transition: var(--tr);
  opacity: 0;
  transform: translateY(24px);
}
.star-card.visible {
  opacity: 1;
  transform: none;
}
.star-card:hover {
  border-color: rgba(255,255,255,0.22);
  box-shadow: 0 0 40px rgba(0,0,0,0.5), 0 8px 32px rgba(0,0,0,0.3);
  transform: translateY(-4px);
}
.star-head {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 14px;
}
.star-orb {
  width: 46px;
  height: 46px;
  border-radius: 50%;
  flex-shrink: 0;
  box-shadow: 0 0 20px rgba(255,255,255,0.18);
}
.star-name {
  font-family: var(--font-head);
  font-size: .88rem;
  color: #fff;
  margin-bottom: 4px;
  letter-spacing: .4px;
}
.star-badge {
  display: inline-block;
  background: rgba(255,255,255,0.07);
  border: 1px solid rgba(255,255,255,0.1);
  color: var(--text-muted);
  font-size: .68rem;
  padding: 2px 8px;
  border-radius: 100px;
  font-family: var(--font-head);
}
.star-desc {
  color: var(--text-muted);
  font-size: .87rem;
  line-height: 1.65;
  margin-bottom: 14px;
}
.star-stats-row {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}
.star-st {
  background: rgba(255,255,255,0.04);
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: 8px;
  padding: 8px 10px;
  text-align: center;
  flex: 1;
  min-width: 68px;
}
.star-st span {
  display: block;
  font-family: var(--font-head);
  font-size: .82rem;
  color: var(--primary);
}
.star-st small {
  font-size: .67rem;
  color: var(--text-muted);
}

/* ============================================================ CALCOLATORE VIAGGIO LUCE */
.light-calc {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: var(--radius);
  padding: 28px 26px;
  max-width: 700px;
  margin: 0 auto;
  backdrop-filter: blur(10px);
}
.light-calc label {
  display: block;
  color: var(--text-muted);
  font-size: .82rem;
  margin-bottom: 8px;
  font-family: var(--font-head);
}
.light-calc select {
  width: 100%;
  background: rgba(255,255,255,0.06);
  border: 1px solid rgba(255,255,255,0.15);
  color: #fff;
  border-radius: 8px;
  padding: 10px 14px;
  font-family: var(--font-head);
  font-size: .85rem;
  margin-bottom: 16px;
  appearance: none;
  cursor: pointer;
}
.light-calc select:focus { outline: none; border-color: var(--primary); }
.light-result {
  background: rgba(0,212,255,0.05);
  border: 1px solid rgba(0,212,255,0.2);
  border-radius: 10px;
  padding: 18px 20px;
  text-align: center;
  min-height: 80px;
  display: flex;
  flex-direction: column;
  justify-content: center;
}
.light-result .lr-dest {
  font-family: var(--font-head);
  font-size: .95rem;
  color: var(--primary);
  margin-bottom: 6px;
}
.light-result .lr-time {
  font-size: 1.5rem;
  font-family: var(--font-head);
  color: #fff;
  letter-spacing: 1px;
}
.light-result .lr-dist {
  font-size: .8rem;
  color: var(--text-muted);
  margin-top: 6px;
}

/* ============================================================ NEBULOSE FAMOSE */
.nebulae-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 16px;
  margin-top: 16px;
}
.nebula-card {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: var(--radius);
  overflow: hidden;
  transition: var(--tr);
}
.nebula-card:hover {
  transform: translateY(-3px);
  border-color: rgba(255,255,255,0.15);
}
.nebula-preview {
  height: 85px;
  position: relative;
  overflow: hidden;
}
.nebula-preview::before {
  content: '';
  position: absolute;
  inset: 0;
  filter: blur(12px);
  transform: scale(1.1);
  background: inherit;
  opacity: .6;
}
.nebula-preview::after {
  content: attr(data-name);
  position: absolute;
  bottom: 8px;
  left: 12px;
  font-family: var(--font-head);
  font-size: .7rem;
  color: rgba(255,255,255,0.6);
  z-index: 1;
}
.nebula-body {
  padding: 14px 16px;
}
.nebula-body h4 {
  font-family: var(--font-head);
  font-size: .82rem;
  color: #fff;
  margin-bottom: 4px;
}
.nebula-body p {
  font-size: .8rem;
  color: var(--text-muted);
  line-height: 1.55;
}
.nebula-tag {
  font-size: .67rem;
  color: var(--text-muted);
  background: rgba(255,255,255,0.06);
  border-radius: 100px;
  padding: 2px 8px;
  display: inline-block;
  margin-bottom: 6px;
  font-family: var(--font-head);
  border: 1px solid rgba(255,255,255,0.1);
}

@media (max-width: 520px) {
  .stars-grid { grid-template-columns: 1fr; }
  .nebulae-grid { grid-template-columns: 1fr 1fr; }
  .light-calc { padding: 20px 16px; }
}