/* =============================================================
   The Trail to 50 — styles.css
   Palette: Sunrise -> Forest Green. Mobile-first.
   ============================================================= */

:root{
  --peach:#ffb88c;
  --rose:#f79a76;
  --pine:#2e5d4b;
  --forest:#1f3a2e;
  --gold:#e8b04b;
  --gold-lite:#ffe6a8;
  --cream:#fbf3e4;
  --ink:#241a12;
  --electric:#c58bff;
  --electric-deep:#7a2bff;

  --font-display:"Trebuchet MS","Segoe UI",-apple-system,system-ui,sans-serif;
  --font-body:"Segoe UI",-apple-system,system-ui,Roboto,sans-serif;
  --font-hand:"Segoe Script","Bradley Hand","Comic Sans MS",cursive;
  --font-serif:"Cormorant Garamond","EB Garamond","Iowan Old Style",Georgia,"Times New Roman",serif;

  --maxw:560px; /* mobile-first content column */
}

*{box-sizing:border-box;}
html,body{margin:0;padding:0;}
body{
  font-family:var(--font-body);
  color:var(--cream);
  background:var(--forest);
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
/* Scroll is locked until the gate is solved */
body.locked{overflow:hidden;height:100vh;}
/* Scroll frozen during the summit fireworks */
html.noscroll{overflow:hidden !important;}
html.noscroll body{overflow:hidden !important;}

img{max-width:100%;display:block;}
button{font-family:inherit;cursor:pointer;}

/* ---------- shared canvas layers ---------- */
.fx-layer{
  position:fixed;inset:0;width:100%;height:100%;
  pointer-events:none;z-index:60;
}
#fx-lightning{z-index:70;}
#fx-confetti{z-index:80;}
#fx-fireworks{z-index:55;}

/* ---------- generic overlay ---------- */
.overlay{
  position:fixed;inset:0;z-index:90;
  display:flex;flex-direction:column;
  align-items:center;justify-content:center;
  text-align:center;padding:28px;
  transition:opacity .8s ease, visibility .8s ease;
}
.overlay.hidden{opacity:0;visibility:hidden;pointer-events:none;}

/* ===========================================================
   STEP 0 — Volume note
   =========================================================== */
#volume-note{
  background:radial-gradient(120% 90% at 50% 20%, #14202a 0%, #0a1016 70%, #060a0e 100%);
  color:var(--cream);
}
#volume-note .vol-emoji{font-size:56px;animation:pulse 2s ease-in-out infinite;}
#volume-note h1{
  font-family:var(--font-display);font-weight:800;
  font-size:clamp(22px,6vw,30px);margin:18px 0 8px;text-wrap:balance;
}
#volume-note p{color:#a9b6c2;margin:0 0 30px;font-size:16px;}

@keyframes pulse{0%,100%{transform:scale(1);}50%{transform:scale(1.14);}}

/* ===========================================================
   THE GATE — electric museum night
   =========================================================== */
#gate{
  background:
    radial-gradient(90% 60% at 50% 8%, rgba(130,80,215,.30) 0%, rgba(10,16,26,0) 60%),
    radial-gradient(120% 100% at 50% 100%, #0b1320 0%, #05070d 100%);
  color:var(--cream);
  justify-content:flex-start;
  padding-top:max(26px, env(safe-area-inset-top));
  gap:18px;overflow-y:auto;
}
.gate-photo{
  width:min(58vw,220px);aspect-ratio:3/4;margin-top:6px;
  background:#0d1622;border:6px solid #f4efe4;border-radius:6px;
  box-shadow:0 14px 40px rgba(0,0,0,.6), 0 0 34px rgba(170,110,255,.35);
  overflow:hidden;position:relative;transform:rotate(-2deg);
}
.gate-photo img{width:100%;height:100%;object-fit:cover;}
.gate-photo .ph-cap{
  position:absolute;left:0;right:0;bottom:0;
  font-family:var(--font-hand);font-size:13px;color:#eaf4ff;
  background:linear-gradient(transparent,rgba(6,12,22,.85));
  padding:16px 6px 6px;
}
.gate-photo::after{ /* faint electric aura */
  content:"";position:absolute;inset:-2px;border-radius:6px;
  box-shadow:inset 0 0 22px rgba(180,120,255,.35);pointer-events:none;
}
.gate-q{
  font-family:var(--font-display);font-weight:800;
  font-size:clamp(20px,5.6vw,28px);line-height:1.25;
  max-width:20ch;text-wrap:balance;margin:4px 0 6px;
  text-shadow:0 2px 18px rgba(170,110,255,.35);
}
.gate-options{
  display:flex;flex-direction:column;gap:12px;width:100%;
  max-width:420px;padding-bottom:30px;
}
.gate-opt{
  display:flex;align-items:center;gap:12px;text-align:left;
  background:rgba(255,255,255,.06);color:var(--cream);
  border:1.5px solid rgba(180,120,255,.28);border-radius:14px;
  padding:15px 16px;font-size:16px;line-height:1.3;
  transition:transform .15s ease, background .2s, border-color .2s, box-shadow .2s;
  -webkit-tap-highlight-color:transparent;
}
.gate-opt .key{
  flex:0 0 auto;width:28px;height:28px;border-radius:50%;
  display:grid;place-items:center;font-weight:800;font-size:14px;
  background:rgba(180,120,255,.18);border:1px solid rgba(180,120,255,.4);
}
.gate-opt:hover{background:rgba(180,120,255,.14);border-color:rgba(180,120,255,.5);}
.gate-opt:active{transform:scale(.98);}
.gate-opt.wrong{animation:shake .4s;border-color:#e06b6b;}
.gate-opt.correct{background:rgba(120,255,180,.16);border-color:#6fe6a0;}
.gate-nudge{min-height:22px;font-size:15px;color:#ffd7a0;font-family:var(--font-hand);}

@keyframes shake{
  0%,100%{transform:translateX(0);}20%{transform:translateX(-8px);}
  40%{transform:translateX(7px);}60%{transform:translateX(-5px);}80%{transform:translateX(4px);}
}

/* ===========================================================
   THE EXPERIENCE (scroll) — dawn to forest
   =========================================================== */
#experience{display:none;}
#experience.on{display:block;}

/* Sky gradient painted per-section; the page overall climbs dawn->forest */
.scene{
  position:relative;min-height:100svh;
  display:flex;flex-direction:column;align-items:center;justify-content:center;
  text-align:center;padding:64px 22px;overflow:hidden;
}
.scene .inner{width:100%;max-width:var(--maxw);position:relative;z-index:2;}

/* Trailhead */
#trailhead{
  background:linear-gradient(180deg,#ffd3a6 0%,var(--peach) 34%,var(--rose) 72%,#e88a6a 100%);
  color:var(--ink);
}
#trailhead .sun{
  position:absolute;top:12%;left:50%;transform:translateX(-50%);
  width:150px;height:150px;border-radius:50%;
  background:radial-gradient(circle,#fff6df 0%,#ffdf9c 55%,rgba(255,210,140,0) 72%);
  animation:breathe 6s ease-in-out infinite;
}
#trailhead h1{
  font-family:var(--font-display);font-weight:800;
  font-size:clamp(34px,10vw,54px);margin:0 0 10px;text-wrap:balance;
  color:#5a2f1c;text-shadow:0 2px 0 rgba(255,255,255,.35);
}
#trailhead .sub{font-size:clamp(17px,4.5vw,22px);color:#7a3f22;font-weight:600;}
#trailhead .scrollhint{
  display:inline-block;margin-top:26px;
  color:#5a2f1c;font-size:15px;font-weight:700;
  background:rgba(255,255,255,.5);border:1px solid rgba(90,45,25,.25);
  padding:10px 18px;border-radius:999px;
  box-shadow:0 6px 16px rgba(120,60,30,.18);
  animation:bobY 1.6s ease-in-out infinite;
}
@keyframes breathe{0%,100%{transform:translateX(-50%) scale(1);}50%{transform:translateX(-50%) scale(1.06);}}
@keyframes bobY{0%,100%{transform:translateY(0);}50%{transform:translateY(8px);}}

/* Parallax mountains sit at the bottom of trailhead */
.mtns{position:absolute;left:0;right:0;bottom:0;width:100%;height:44%;z-index:1;}

/* ---- The trail with milestones ---- */
#trail{
  position:relative;
  background:linear-gradient(180deg,#e88a6a 0%,#c98a63 18%,#7f9b6a 46%,var(--pine) 74%,#274d3d 100%);
  padding:40px 0 20px;
}
/* central vertical dashed path that "grows" with scroll */
.trail-line{
  position:absolute;top:0;left:50%;transform:translateX(-50%);
  width:4px;height:100%;
  background-image:linear-gradient(#fff 0 60%, transparent 0);
  background-size:4px 20px;opacity:.55;z-index:1;
}
.trail-progress{
  position:absolute;top:0;left:50%;transform:translateX(-50%);
  width:5px;height:0;z-index:2;border-radius:3px;
  background:linear-gradient(var(--gold-lite),var(--gold));
  box-shadow:0 0 12px rgba(232,176,75,.8);
}
.milestone{
  position:relative;z-index:3;
  min-height:78svh;display:flex;align-items:center;justify-content:center;
  padding:30px 20px;
}
.polaroid{
  width:min(78vw,320px);background:#fff;padding:12px 12px 44px;
  border-radius:6px;box-shadow:0 18px 44px rgba(0,0,0,.4);
  color:#2a2a2a;
  transform:rotate(var(--tilt,-4deg)) translateY(28px);
  opacity:0;transition:opacity .7s ease, transform .7s cubic-bezier(.2,.8,.2,1);
  transform-origin:top center;
}
.milestone:nth-child(even) .polaroid{--tilt:4deg;}
.polaroid.in{opacity:1;transform:rotate(var(--tilt,-4deg)) translateY(0);}
.polaroid .pic{
  aspect-ratio:4/5;border-radius:3px;overflow:hidden;
  background:linear-gradient(140deg,var(--rose),var(--pine));
  display:grid;place-items:center;
}
.polaroid .pic img{width:100%;height:100%;object-fit:cover;object-position:center;}
.polaroid .pic .missing{
  font-size:13px;color:rgba(255,255,255,.85);padding:10px;text-align:center;
  font-family:var(--font-body);
}
.polaroid .cap{
  font-family:var(--font-hand);font-size:18px;text-align:center;
  margin-top:12px;line-height:1.2;color:#2a2a2a;
}
.polaroid .note{font-size:12px;color:#8a8a8a;text-align:center;margin-top:3px;}

/* ---- Summit ---- */
#summit{
  background:linear-gradient(180deg,#274d3d 0%,#1f3a2e 55%,#16281f 100%);
  color:var(--cream);
}
#summit h2{
  font-family:var(--font-display);font-weight:800;
  font-size:clamp(30px,9vw,50px);margin:0 0 10px;text-wrap:balance;
  color:var(--gold-lite);text-shadow:0 0 30px rgba(232,176,75,.5);
}
#summit .sub{font-size:18px;color:#cfe0d3;}
#summit .scrollhint{
  display:inline-block;margin-top:26px;
  color:#1f3a2e;font-size:15px;font-weight:700;
  background:rgba(255,230,168,.92);border:1px solid rgba(232,176,75,.6);
  padding:10px 18px;border-radius:999px;
  box-shadow:0 6px 18px rgba(0,0,0,.35);
  animation:bobY 1.6s ease-in-out infinite;
}

/* ---- Letter on cream paper ---- */
#letter{
  background:linear-gradient(180deg,#16281f 0%,#1f3a2e 100%);
  color:var(--ink);padding:64px 18px 72px;
}
.paper{
  width:100%;max-width:var(--maxw);margin:0 auto;
  background:#fffdfa;
  border-radius:8px;padding:44px 30px 48px;
  box-shadow:0 30px 70px rgba(0,0,0,.55), 0 2px 0 rgba(255,255,255,.6) inset;
  position:relative;color:#2b2622;
  border:1px solid rgba(120,90,50,.12);
}
.paper::before{ /* delicate gold rule under the title */
  content:"";position:absolute;left:50%;top:0;transform:translateX(-50%);
  width:64px;height:3px;margin-top:30px;border-radius:2px;
  background:linear-gradient(90deg,transparent,var(--gold),transparent);opacity:0;
}
.paper h2{
  font-family:var(--font-serif);font-weight:600;
  font-size:clamp(26px,7vw,34px);letter-spacing:.01em;
  margin:0 0 26px;color:#4a3b2a;text-align:center;text-wrap:balance;
}
.verse{margin:0 auto;max-width:34ch;}
.paper p.vline{
  font-family:var(--font-serif);font-style:italic;
  font-size:clamp(17px,4.7vw,20px);line-height:1.62;
  text-align:center;text-wrap:balance;margin:0 0 9px;color:#3a332b;
  opacity:0;transform:translateY(12px);transition:opacity .6s ease, transform .6s ease;
}
.paper p.blessing{
  font-family:var(--font-serif);font-weight:500;
  font-size:clamp(17.5px,4.9vw,21px);line-height:1.66;
  text-align:center;text-wrap:pretty;margin:30px auto 0;max-width:40ch;color:#2b2622;
  padding-top:26px;border-top:1px solid rgba(120,90,50,.16);
  opacity:0;transform:translateY(14px);transition:opacity .7s ease, transform .7s ease;
}
.paper p.in{opacity:1;transform:none;}
.paper .sig{
  font-family:var(--font-serif);font-style:italic;font-size:20px;color:#7a5a2a;
  text-align:right;margin-top:22px;
}
.paper .sig:empty{display:none;}

/* ---- Closing ---- */
#closing{
  background:linear-gradient(180deg,#1f3a2e 0%,#132018 100%);
  color:var(--cream);gap:22px;
}
#closing .msg{
  font-family:var(--font-display);font-weight:700;
  font-size:clamp(20px,6vw,28px);max-width:22ch;text-wrap:balance;
  color:var(--gold-lite);
}
#closing .replay{
  background:linear-gradient(var(--gold-lite),var(--gold));color:#5a3d10;
  border:none;border-radius:999px;padding:15px 26px;font-weight:800;font-size:17px;
  box-shadow:0 10px 26px rgba(232,176,75,.5);transition:transform .15s;
}
#closing .replay:active{transform:scale(.96);}

/* floating lanterns */
.lantern{
  position:absolute;bottom:-40px;width:16px;height:22px;border-radius:50% 50% 45% 45%;
  background:radial-gradient(circle at 50% 35%, #ffe6a8, #f0a24a);
  box-shadow:0 0 16px rgba(240,162,74,.8);opacity:.85;
  animation:rise linear infinite;
}
@keyframes rise{
  0%{transform:translateY(0) translateX(0);opacity:0;}
  10%{opacity:.9;}
  100%{transform:translateY(-118vh) translateX(24px);opacity:0;}
}

/* ---- Primary button (volume note) ---- */
.btn-primary{
  background:linear-gradient(var(--gold-lite),var(--gold));color:#5a3d10;
  border:none;border-radius:999px;padding:16px 30px;font-weight:800;font-size:18px;
  box-shadow:0 10px 30px rgba(232,176,75,.45);transition:transform .15s;
}
.btn-primary:active{transform:scale(.96);}

/* ---- Mute toggle ---- */
#mute{
  position:fixed;top:12px;right:12px;z-index:95;
  width:44px;height:44px;border-radius:50%;border:none;
  background:rgba(0,0,0,.4);color:#fff;font-size:20px;
  display:none;place-items:center;backdrop-filter:blur(4px);
}
#mute.on{display:grid;}

/* ---- Focus visibility (accessibility) ---- */
:focus-visible{outline:3px solid var(--gold-lite);outline-offset:2px;border-radius:8px;}

/* ---- Reduced motion ---- */
@media (prefers-reduced-motion:reduce){
  *{animation-duration:.001ms !important;animation-iteration-count:1 !important;}
  .polaroid,.paper p{transition:opacity .3s ease;transform:none;}
  .polaroid{transform:rotate(var(--tilt,-4deg));}
}

/* ---- Larger screens: keep it centered & cozy, not stretched ---- */
@media (min-width:720px){
  :root{--maxw:600px;}
  .gate-photo{width:200px;}
}