/* ============================================================
   TrigTutor.org — Global Stylesheet
   ============================================================ */

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

/* ===== CSS VARIABLES ===== */
:root{
  --bg-void:#050510;
  --bg-deep:#0a0a1a;
  --nebula-1:#1a0a3e;
  --nebula-2:#0d1b3e;
  --nebula-3:#1e0a2e;
  --star-white:#e8e6f0;
  --star-blue:#7eb8ff;
  --star-gold:#ffd475;
  --accent-sun:#ff6b35;
  --accent-planet:#3b8bff;
  --accent-ring:#00cec9;
  --accent-glow:#5ba8ff;
  --text-primary:#e8e6f0;
  --text-secondary:#9b97b0;
  --text-dim:#5a5678;
  --surface:#12122a;
  --surface-hover:#1a1a3a;
  --surface-border:rgba(124,118,170,0.12);
  --surface-border-strong:rgba(124,118,170,0.24);
  --glass:rgba(18,18,42,0.7);
  --glass-bright:rgba(30,30,60,0.8);
  --cta-gradient:linear-gradient(135deg,#0984e3,#3b8bff,#0984e3);
  --pro-gradient:linear-gradient(135deg,#ffd475,#ff9f43);
  --free-badge:#00cec9;
  --member-badge:#ffd475;
  --panel-bg:#12122a;
  --panel-bg-alt:#161630;
  --radius-sm:8px;
  --radius-md:12px;
  --radius-lg:16px;
  --radius-xl:20px;
}

html{scroll-behavior:smooth;overflow-x:hidden}
body{
  font-family:'Outfit',sans-serif;
  background:var(--bg-void);
  color:var(--text-primary);
  min-height:100vh;
  overflow-x:hidden;
  line-height:1.6;
}

a{color:inherit;text-decoration:none}

/* ===== CANVAS & BACKGROUND LAYERS ===== */
#starfield{position:fixed;top:0;left:0;width:100%;height:100%;z-index:0;pointer-events:none}
#planets-layer{position:fixed;top:0;left:0;width:100%;height:100%;z-index:1;pointer-events:none;overflow:hidden}
.nebula-bg{
  position:fixed;top:0;left:0;width:100%;height:100%;z-index:0;
  background:
    radial-gradient(ellipse 80% 60% at 20% 30%, rgba(26,10,62,0.5) 0%, transparent 70%),
    radial-gradient(ellipse 60% 80% at 80% 70%, rgba(13,27,62,0.4) 0%, transparent 70%),
    radial-gradient(ellipse 50% 50% at 50% 50%, rgba(30,10,46,0.3) 0%, transparent 70%),
    var(--bg-void);
  pointer-events:none;
}

/* ===== FLOATING PLANETS ===== */
.planet{position:absolute;border-radius:50%;animation-timing-function:linear;animation-iteration-count:infinite;filter:blur(0px)}
.planet-sun{
  width:80px;height:80px;
  background:radial-gradient(circle at 35% 35%,#fff5c0,#ffb347 40%,#ff6b35 70%,#cc3300 100%);
  box-shadow:0 0 60px rgba(255,107,53,0.6),0 0 120px rgba(255,107,53,0.3),inset -8px -8px 20px rgba(0,0,0,0.2);
  animation:orbit-sun 90s linear infinite;top:15%;left:-100px;
}
.planet-sun::after{
  content:'';position:absolute;top:-15px;left:-15px;right:-15px;bottom:-15px;border-radius:50%;
  background:radial-gradient(circle,rgba(255,107,53,0.15),transparent 70%);
}
.planet-purple{
  width:50px;height:50px;
  background:radial-gradient(circle at 30% 30%,#74b9ff,#0984e3 50%,#0652DD 100%);
  box-shadow:0 0 30px rgba(59,139,255,0.4),inset -5px -5px 12px rgba(0,0,0,0.3);
  animation:orbit-purple 120s linear infinite;top:60%;right:-60px;
}
.planet-purple::before{
  content:'';position:absolute;top:50%;left:-12px;right:-12px;height:8px;
  background:linear-gradient(90deg,transparent,rgba(59,139,255,0.4),rgba(59,139,255,0.6),rgba(59,139,255,0.4),transparent);
  border-radius:50%;transform:translateY(-50%) rotateX(75deg);
}
.planet-teal{
  width:35px;height:35px;
  background:radial-gradient(circle at 35% 30%,#72f5eb,#00cec9 50%,#006d6a 100%);
  box-shadow:0 0 25px rgba(0,206,201,0.4),inset -4px -4px 10px rgba(0,0,0,0.3);
  animation:orbit-teal 75s linear infinite;top:35%;left:-50px;
}
.planet-pink{
  width:25px;height:25px;
  background:radial-gradient(circle at 30% 30%,#ffb8d4,#fd79a8 50%,#c44569 100%);
  box-shadow:0 0 20px rgba(253,121,168,0.35),inset -3px -3px 8px rgba(0,0,0,0.3);
  animation:orbit-pink 55s linear infinite;top:80%;left:-30px;
}
.moon{
  width:14px;height:14px;
  background:radial-gradient(circle at 35% 35%,#e8e6f0,#9b97b0 60%,#5a5678 100%);
  box-shadow:0 0 8px rgba(232,230,240,0.2);
  animation:orbit-moon 40s linear infinite;top:20%;right:-20px;
}

@keyframes orbit-sun{
  0%{transform:translate(0,0)}25%{transform:translate(calc(100vw + 200px),20vh)}
  50%{transform:translate(calc(100vw - 200px),calc(100vh - 200px))}75%{transform:translate(-100px,50vh)}100%{transform:translate(0,0)}
}
@keyframes orbit-purple{
  0%{transform:translate(0,0)}25%{transform:translate(calc(-100vw - 100px),-30vh)}
  50%{transform:translate(calc(-100vw + 300px),calc(-100vh + 100px))}75%{transform:translate(100px,-50vh)}100%{transform:translate(0,0)}
}
@keyframes orbit-teal{
  0%{transform:translate(0,0)}25%{transform:translate(60vw,-20vh)}
  50%{transform:translate(calc(100vw + 50px),40vh)}75%{transform:translate(30vw,50vh)}100%{transform:translate(0,0)}
}
@keyframes orbit-pink{
  0%{transform:translate(0,0)}20%{transform:translate(40vw,-60vh)}40%{transform:translate(80vw,-30vh)}
  60%{transform:translate(60vw,10vh)}80%{transform:translate(20vw,-10vh)}100%{transform:translate(0,0)}
}
@keyframes orbit-moon{
  0%{transform:translate(0,0)}25%{transform:translate(calc(-80vw),40vh)}
  50%{transform:translate(calc(-40vw),70vh)}75%{transform:translate(calc(-100vw),20vh)}100%{transform:translate(0,0)}
}

/* ===== CONTENT WRAPPER ===== */
.content-wrapper{position:relative;z-index:10;min-height:100vh}

/* ===== NAVBAR ===== */
.navbar{
  position:fixed;top:0;left:0;right:0;z-index:100;
  padding:16px 32px;
  display:flex;align-items:center;justify-content:space-between;
  background:rgba(5,5,16,0.8);
  backdrop-filter:blur(20px);
  border-bottom:1px solid var(--surface-border);
  transition:all 0.3s ease;
}
.navbar.scrolled{background:rgba(5,5,16,0.95);padding:12px 32px}
.nav-brand{display:flex;align-items:center;gap:12px;text-decoration:none}
.nav-logo{
  font-family:'Sora',sans-serif;font-weight:800;font-size:1.5rem;
  background:linear-gradient(135deg,var(--accent-ring),var(--star-blue),var(--accent-planet));
  -webkit-background-clip:text;-webkit-text-fill-color:transparent;
  letter-spacing:-0.02em;
}
.nav-logo span{
  -webkit-text-fill-color:var(--star-gold);font-weight:400;font-size:0.85rem;
  margin-left:2px;letter-spacing:0.05em;
}
.nav-links{display:flex;align-items:center;gap:24px}
.nav-links a{
  color:var(--text-secondary);text-decoration:none;font-size:0.9rem;font-weight:500;
  transition:color 0.2s;letter-spacing:0.01em;
}
.nav-links a:hover,.nav-links a.active{color:var(--text-primary)}
.nav-cta{
  padding:10px 24px;border-radius:10px;font-weight:700;font-size:0.9rem;
  background:var(--pro-gradient);
  color:#1a1a2e;border:none;cursor:pointer;text-decoration:none;
  transition:all 0.3s;letter-spacing:0.01em;
}
.nav-cta:hover{transform:translateY(-1px);box-shadow:0 4px 20px rgba(255,212,117,0.4)}
.nav-pro{
  padding:8px 20px;border-radius:10px;font-weight:700;font-size:0.85rem;
  background:var(--pro-gradient);
  color:#000;border:none;cursor:pointer;text-decoration:none;
  letter-spacing:0.02em;transition:all 0.3s;
  display:inline-flex;align-items:center;gap:6px;
}
.nav-pro:hover{transform:translateY(-1px);box-shadow:0 4px 16px rgba(255,212,117,0.3)}
.nav-pro svg{width:14px;height:14px}

/* Mobile hamburger */
.nav-hamburger{display:none;background:none;border:none;color:var(--text-primary);cursor:pointer;padding:4px}
.nav-hamburger svg{width:24px;height:24px}

@keyframes gradient-shift{0%,100%{background-position:0% 50%}50%{background-position:100% 50%}}

/* ===== SECTION LAYOUT ===== */
.section{padding:80px 24px;max-width:1280px;margin:0 auto}
.section-header{text-align:center;margin-bottom:56px}
.section-label{
  font-size:0.78rem;text-transform:uppercase;letter-spacing:0.15em;
  color:var(--accent-ring);font-weight:600;margin-bottom:12px;
}
.section-title{
  font-family:'Sora',sans-serif;font-size:clamp(2rem,4vw,3rem);
  font-weight:700;letter-spacing:-0.02em;line-height:1.15;
  margin-bottom:16px;
}
.section-desc{
  font-size:1.05rem;color:var(--text-secondary);max-width:600px;
  margin:0 auto;font-weight:300;line-height:1.7;
}

/* ===== BADGES ===== */
.badge-free{background:rgba(0,206,201,0.15);color:var(--free-badge)}
.badge-member,.badge-pro{background:rgba(255,212,117,0.12);color:var(--member-badge)}
.tile-badge,.module-badge{
  font-size:0.65rem;text-transform:uppercase;letter-spacing:0.08em;
  padding:3px 10px;border-radius:100px;font-weight:600;
}

/* ===== BUTTONS ===== */
.btn-primary{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:14px 32px;border-radius:12px;font-family:'Outfit',sans-serif;
  font-weight:600;font-size:1rem;
  background:var(--cta-gradient);background-size:200% 200%;
  color:#fff;border:none;cursor:pointer;transition:all 0.3s;
  text-decoration:none;animation:gradient-shift 4s ease infinite;
}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 6px 24px rgba(59,139,255,0.4)}
.btn-secondary{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:14px 32px;border-radius:12px;font-family:'Outfit',sans-serif;
  font-weight:600;font-size:1rem;
  background:transparent;color:var(--text-primary);
  border:1px solid var(--surface-border);cursor:pointer;transition:all 0.3s;
  text-decoration:none;
}
.btn-secondary:hover{border-color:rgba(124,118,170,0.4);background:rgba(255,255,255,0.03)}
.btn-gold{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:14px 32px;border-radius:12px;font-family:'Outfit',sans-serif;
  font-weight:700;font-size:1rem;
  background:var(--pro-gradient);color:#1a1a2e;border:none;cursor:pointer;
  transition:all 0.3s;text-decoration:none;
}
.btn-gold:hover{transform:translateY(-2px);box-shadow:0 6px 24px rgba(255,212,117,0.3)}

/* ===== GLASS CARDS ===== */
.glass-card{
  background:var(--glass);
  border:1px solid var(--surface-border);
  border-radius:var(--radius-xl);
  padding:32px;
  transition:all 0.35s cubic-bezier(0.25,0.46,0.45,0.94);
}
.glass-card:hover{
  border-color:rgba(124,118,170,0.25);
  box-shadow:0 8px 40px rgba(0,0,0,0.4);
  background:var(--glass-bright);
}

/* ===== FOOTER ===== */
.site-footer{
  padding:60px 24px 40px;
  border-top:1px solid var(--surface-border);
  position:relative;z-index:10;
  background:rgba(5,5,16,0.4);
}
.footer-inner{
  max-width:1200px;margin:0 auto;
  display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:48px;
  padding-bottom:40px;border-bottom:1px solid var(--surface-border);
  margin-bottom:32px;
}
.footer-brand-col .footer-logo{
  font-family:'Sora',sans-serif;font-weight:800;font-size:1.4rem;
  background:linear-gradient(135deg,var(--accent-ring),var(--star-blue),var(--accent-planet));
  -webkit-background-clip:text;-webkit-text-fill-color:transparent;
  margin-bottom:12px;
}
.footer-brand-col .footer-logo span{
  -webkit-text-fill-color:var(--star-gold);font-weight:400;font-size:0.75rem;
  margin-left:2px;
}
.footer-brand-col p{font-size:0.85rem;color:var(--text-secondary);line-height:1.7;font-weight:300;max-width:300px}
.footer-col h4{
  font-family:'Sora',sans-serif;font-size:0.8rem;font-weight:700;
  text-transform:uppercase;letter-spacing:0.1em;color:var(--text-primary);
  margin-bottom:16px;
}
.footer-col a{
  display:block;color:var(--text-secondary);text-decoration:none;
  font-size:0.85rem;padding:4px 0;transition:color 0.2s;font-weight:400;
}
.footer-col a:hover{color:var(--accent-ring)}
.footer-bottom{
  max-width:1200px;margin:0 auto;
  display:flex;align-items:center;justify-content:space-between;
  flex-wrap:wrap;gap:16px;
}
.footer-copy{font-size:0.78rem;color:var(--text-dim);line-height:1.7}
.footer-copy img{vertical-align:middle;margin:0 3px}
.footer-legal{display:flex;gap:20px;flex-wrap:wrap}
.footer-legal a{font-size:0.78rem;color:var(--text-dim);text-decoration:none;transition:color 0.2s}
.footer-legal a:hover{color:var(--text-secondary)}
.footer-trust{
  max-width:1200px;margin:20px auto 0;padding-top:20px;
  border-top:1px solid rgba(124,118,170,0.06);
  font-size:0.72rem;color:var(--text-dim);line-height:1.8;text-align:center;
}

/* ===== GLOW EFFECTS ===== */
.glow-orb{
  position:absolute;border-radius:50%;filter:blur(80px);opacity:0.15;
  pointer-events:none;animation:float-glow 15s ease-in-out infinite;
}
@keyframes float-glow{0%,100%{transform:translate(0,0)}33%{transform:translate(30px,-20px)}66%{transform:translate(-20px,30px)}}

/* ===== SCROLL ANIMATIONS ===== */
.reveal{opacity:0;transform:translateY(30px);transition:all 0.7s cubic-bezier(0.25,0.46,0.45,0.94)}
.reveal.visible{opacity:1;transform:translateY(0)}
@keyframes fadeInUp{from{opacity:0;transform:translateY(20px)}to{opacity:1;transform:translateY(0)}}
@keyframes fadeInDown{from{opacity:0;transform:translateY(-10px)}to{opacity:1;transform:translateY(0)}}
@keyframes fadeIn{from{opacity:0;transform:translateY(6px)}to{opacity:1;transform:translateY(0)}}
@keyframes pulse-dot{0%,100%{opacity:1;transform:scale(1)}50%{opacity:0.5;transform:scale(0.7)}}
@keyframes bounce-down{0%,100%{transform:translateY(0);opacity:0.4}50%{transform:translateY(8px);opacity:1}}

/* ===== RESPONSIVE ===== */
@media(max-width:900px){
  .footer-inner{grid-template-columns:1fr 1fr;gap:32px}
  .section{padding:60px 20px}
}
@media(max-width:640px){
  .navbar{padding:12px 16px}
  .nav-links{display:none}
  .nav-hamburger{display:flex}
  .section{padding:48px 16px}
  .footer-inner{grid-template-columns:1fr;gap:24px}
  .footer-bottom{flex-direction:column;align-items:flex-start}
}