/* Alive layer: world colours, animated gradient, particles, ripples, glow, level-up, toasts. All additive. */
:root { --w1: #ff5da2; --w2: #ffd43b; --w3: #22d3ee; --px: 0; --py: 0; --sy: 0; }

#fx-bg { position: fixed; inset: 0; z-index: -1; overflow: hidden; pointer-events: none; }
#fx-canvas { position: fixed; inset: 0; z-index: 0; pointer-events: none; }
.fx-blob { position: absolute; border-radius: 50%; filter: blur(70px); opacity: 0.28; will-change: transform; }
.fx-blob.b1 { width: 46vmax; height: 46vmax; left: -12vmax; top: -10vmax; background: var(--w1); }
.fx-blob.b2 { width: 40vmax; height: 40vmax; right: -10vmax; top: 18vh; background: var(--w2); opacity: 0.2; }
.fx-blob.b3 { width: 44vmax; height: 44vmax; left: 20vw; bottom: -22vmax; background: var(--w3); opacity: 0.24; }
.fx-grid { position: absolute; inset: 0; opacity: 0.07; background-image: linear-gradient(var(--w3) 1px, transparent 1px), linear-gradient(90deg, var(--w3) 1px, transparent 1px); background-size: 56px 56px; mask-image: linear-gradient(#000, transparent 70%); }
html[data-fx="high"] .fx-blob { animation: blob-drift 22s ease-in-out infinite alternate; transform: translate(calc(var(--px) * -40px), calc(var(--py) * -30px - var(--sy) * 120px)); transition: background 1.2s; }
html[data-fx="high"] .fx-blob.b2 { animation-duration: 28s; animation-direction: alternate-reverse; transform: translate(calc(var(--px) * 55px), calc(var(--py) * 40px)); }
html[data-fx="high"] .fx-blob.b3 { animation-duration: 34s; }
html[data-fx="low"] .fx-blob { animation: blob-drift 40s ease-in-out infinite alternate; }
html[data-fx="off"] .fx-blob { animation: none; opacity: 0.12; }
html[data-fx="off"] #fx-canvas { display: none; }
@keyframes blob-drift { from { margin: 0; } to { margin: 6vmax 4vmax 0 -4vmax; } }
html[data-theme="paper"] .fx-blob { opacity: 0.16; mix-blend-mode: multiply; }
html[data-theme="terminal"] .fx-blob { opacity: 0.12; }
html[data-theme="contrast"] #fx-bg, html[data-theme="contrast"] #fx-canvas { display: none; }
html[data-theme="paper"] #fx-canvas { opacity: 0.6; }

/* animated gradient accents */
.topbar { border-bottom: 2px solid transparent; border-image: linear-gradient(90deg, var(--w1), var(--w2), var(--w3), var(--w1)) 1; }
html[data-fx="high"] .topbar { border-image-source: linear-gradient(90deg, var(--w1), var(--w2), var(--w3), var(--w1), var(--w2)); animation: bar-shift 9s linear infinite; }
html[data-theme="contrast"] .topbar { border-image: none; border-bottom-color: #fff; }
@keyframes bar-shift { to { border-image-source: linear-gradient(90deg, var(--w2), var(--w3), var(--w1), var(--w2), var(--w3)); } }
html:not([data-theme="contrast"]) main h1 { background: linear-gradient(100deg, var(--ink) 0%, var(--ink) 35%, var(--w1) 60%, var(--w3) 100%); background-size: 220% 100%; -webkit-background-clip: text; background-clip: text; color: transparent; padding-bottom: 0.06em; }
html[data-fx="high"]:not([data-theme="contrast"]) main h1 { animation: h1-sheen 7s ease-in-out infinite alternate; }
@keyframes h1-sheen { to { background-position: 100% 0; } }
html[data-theme="paper"] main h1 { background-image: linear-gradient(100deg, var(--ink) 0%, var(--ink) 40%, var(--w1) 100%); }
.primary { background-image: linear-gradient(110deg, var(--accent), var(--w2)); box-shadow: 0 6px 18px color-mix(in srgb, var(--w1) 35%, transparent); }
html[data-fx="high"] .primary:hover { box-shadow: 0 8px 26px color-mix(in srgb, var(--w1) 60%, transparent), 0 0 0 2px color-mix(in srgb, var(--w3) 55%, transparent); transform: translateY(-2px); }
.sec-tile, .menu-card, .lesson-row, .level-card, .game-card { transition: box-shadow 220ms, transform 220ms, border-color 220ms; }
html[data-fx="high"] .sec-tile:hover, html[data-fx="high"] .menu-card:hover, html[data-fx="high"] .lesson-row:hover, html[data-fx="high"] .level-card:hover, html[data-fx="high"] .game-card:hover, html[data-fx="high"] .lvl-card:hover, html[data-fx="high"] .dc-card:hover { box-shadow: 0 10px 32px color-mix(in srgb, var(--w1) 38%, transparent), 0 0 0 1.5px color-mix(in srgb, var(--w3) 70%, transparent); border-color: var(--w3); }
html[data-fx="high"]:not([data-theme="contrast"]) .lvl-card, html[data-fx="high"]:not([data-theme="contrast"]) .dc-card { box-shadow: 0 0 0 1px color-mix(in srgb, var(--w3) 45%, transparent), 0 8px 22px color-mix(in srgb, var(--w1) 18%, transparent); }
html[data-fx="high"] .hero3d::before { content: ""; position: absolute; inset: -2px; z-index: -1; border-radius: inherit; background: conic-gradient(from var(--hero-a, 0deg), var(--w1), var(--w2), var(--w3), var(--w1)); filter: blur(26px); opacity: 0.35; animation: hero-spin 14s linear infinite; }
@property --hero-a { syntax: "<angle>"; inherits: false; initial-value: 0deg; }
@keyframes hero-spin { to { --hero-a: 360deg; } }
.hero3d { position: relative; isolation: isolate; }

/* ripples */
.fx-host { overflow: hidden; }
.fx-ripple { position: absolute; border-radius: 50%; pointer-events: none; background: radial-gradient(circle, color-mix(in srgb, var(--w2) 70%, #fff) 0%, color-mix(in srgb, var(--w3) 40%, transparent) 55%, transparent 70%); transform: scale(0); opacity: 0.7; animation: ripple 650ms ease-out forwards; }
@keyframes ripple { to { transform: scale(1); opacity: 0; } }

/* level cards (home + level pages) */
.level-row { display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px; margin: 18px 0 8px; }
.level-card { position: relative; display: block; padding: 16px 16px 14px; border-radius: 16px; border: 1px solid var(--line); background: linear-gradient(150deg, color-mix(in srgb, var(--c1) 22%, var(--bg-elev)), var(--bg-elev) 70%); color: var(--ink); text-decoration: none; overflow: hidden; }
.level-card b { display: block; font: 700 1.15rem/1.2 Fraunces, Georgia, serif; }
.level-card .lc-n { display: inline-grid; place-items: center; width: 38px; height: 38px; border-radius: 12px; margin-bottom: 8px; font: 800 1.1rem "IBM Plex Mono", monospace; color: #10233a; background: linear-gradient(135deg, var(--c1), var(--c2)); box-shadow: 0 0 18px color-mix(in srgb, var(--c1) 70%, transparent); }
.level-card span.lc-t { display: block; margin-top: 4px; color: var(--muted); font-size: 0.9rem; }
@media (max-width: 899px) { .level-row { grid-template-columns: 1fr 1fr; } }
@media (max-width: 420px) { .level-row { grid-template-columns: 1fr; } }
.world-tag { display: inline-flex; gap: 8px; align-items: center; padding: 4px 12px; border-radius: 999px; font-weight: 700; font-size: 0.85rem; background: linear-gradient(110deg, color-mix(in srgb, var(--w1) 30%, var(--bg-elev)), color-mix(in srgb, var(--w3) 30%, var(--bg-elev))); border: 1px solid var(--line); }

/* XP chip + toasts + level up */
.xp-chip { display: inline-flex; align-items: center; gap: 6px; padding: 6px 12px; border-radius: 999px; font: 700 0.85rem "Atkinson Hyperlegible", system-ui, sans-serif; color: #10233a; text-decoration: none; background: linear-gradient(110deg, var(--w2), var(--w1)); box-shadow: 0 0 14px color-mix(in srgb, var(--w1) 50%, transparent); white-space: nowrap; }
@media (max-width: 899px) { .topbar .xp-chip { display: none; } }
#fx-toasts { position: fixed; left: 50%; transform: translateX(-50%); top: calc(var(--top-h) + 10px); z-index: 60; display: grid; gap: 8px; width: min(420px, calc(100vw - 24px)); pointer-events: none; }
.fx-toast { padding: 10px 14px; border-radius: 14px; background: #fff; color: #10233a; border: 2px solid var(--w1); box-shadow: 0 8px 28px rgba(0, 0, 0, 0.35), 0 0 0 4px color-mix(in srgb, var(--w2) 55%, transparent); display: grid; gap: 2px; animation: toast-in 380ms cubic-bezier(.3, 1.5, .5, 1); }
.fx-toast span { font-size: 0.88rem; }
@keyframes toast-in { from { opacity: 0; transform: translateY(-14px) scale(0.9); } }
.levelup { position: fixed; inset: 0; z-index: 420; display: grid; place-items: center; background: radial-gradient(circle at 50% 45%, rgba(0, 0, 0, 0.55), rgba(0, 0, 0, 0.78)); animation: lu-fade 300ms ease; cursor: pointer; }
.lu-card { text-align: center; color: #fff; padding: 24px; }
.lu-ring { width: 150px; height: 150px; margin: 0 auto 10px; border-radius: 50%; display: grid; place-items: center; font: 800 4rem "IBM Plex Mono", monospace; color: #10233a; background: conic-gradient(var(--w1), var(--w2), var(--w3), var(--w1)); box-shadow: 0 0 60px var(--w2), 0 0 120px var(--w1); animation: lu-pop 700ms cubic-bezier(.3, 1.6, .5, 1); }
.lu-ring span { display: grid; place-items: center; width: 118px; height: 118px; border-radius: 50%; background: #fff; }
.lu-title { margin: 6px 0 0; font: 800 2.4rem Fraunces, Georgia, serif; background: linear-gradient(90deg, var(--w2), var(--w1), var(--w3)); -webkit-background-clip: text; background-clip: text; color: transparent; }
.lu-sub { margin: 4px 0 0; font-size: 1.1rem; }
@keyframes lu-fade { from { opacity: 0; } }
@keyframes lu-pop { from { transform: scale(0.2) rotate(-120deg); opacity: 0; } }
html[data-fx="off"] .lu-ring, html[data-fx="off"] .levelup, html[data-fx="off"] .fx-toast { animation: none; }

/* welcome banner */
.welcome { position: fixed; left: 50%; transform: translateX(-50%); top: calc(var(--top-h) + 10px); z-index: 44; width: min(620px, calc(100vw - 20px)); display: grid; grid-template-columns: auto 1fr auto; gap: 12px; align-items: center; padding: 12px 14px; border-radius: 18px; color: #10233a; background: linear-gradient(110deg, #fff, #fff5d6); border: 2px solid var(--w1); box-shadow: 0 12px 34px rgba(0, 0, 0, 0.35), 0 0 0 5px color-mix(in srgb, var(--w2) 45%, transparent); animation: toast-in 450ms cubic-bezier(.3, 1.5, .5, 1); }
.welcome { pointer-events: none; }
.welcome button { pointer-events: auto; }
.welcome .wl-emoji { font-size: 2rem; line-height: 1; }
.welcome b { display: block; font: 800 1.05rem/1.25 Fraunces, Georgia, serif; }
.welcome span.wl-t { display: block; font-size: 0.92rem; margin-top: 2px; }
.welcome .wl-actions { display: flex; gap: 8px; align-items: center; margin-top: 8px; flex-wrap: wrap; }
.welcome .wl-go { font: inherit; font-weight: 700; padding: 6px 12px; border-radius: 999px; border: 0; cursor: pointer; color: #10233a; background: linear-gradient(110deg, var(--w2), var(--w1)); }
.welcome .wl-x { font-size: 1.5rem; line-height: 1; border: 0; background: transparent; cursor: pointer; color: #10233a; padding: 4px 8px; align-self: start; }
html[data-fx="off"] .welcome { animation: none; }
@media (max-width: 420px) { .welcome { grid-template-columns: auto 1fr auto; padding: 10px; } .welcome { pointer-events: none; }
.welcome button { pointer-events: auto; }
.welcome .wl-emoji { font-size: 1.5rem; } }

/* guided tour */
.tour-scrim { position: fixed; inset: 0; z-index: 430; }
.tour-ring { position: fixed; z-index: 431; border-radius: 14px; box-shadow: 0 0 0 9999px rgba(8, 12, 20, 0.72), 0 0 0 3px var(--w2), 0 0 24px 4px var(--w1); pointer-events: none; transition: all 300ms ease; }
.tour-ring.none { box-shadow: 0 0 0 9999px rgba(8, 12, 20, 0.72); width: 0; height: 0; }
.tour-card { position: fixed; z-index: 432; width: min(360px, calc(100vw - 24px)); padding: 16px 16px 12px; border-radius: 18px; background: #fff; color: #10233a; border: 2px solid var(--w1); box-shadow: 0 14px 40px rgba(0, 0, 0, 0.5); }
.tour-card h2 { margin: 0 0 4px; font: 800 1.15rem Fraunces, Georgia, serif; color: #10233a; }
.tour-card p { margin: 0 0 10px; font-size: 0.95rem; color: #1f3347; }
.tour-card .tc-row { display: flex; gap: 8px; align-items: center; flex-wrap: wrap; }
.tour-card button, .tour-card a.tc-go { font: inherit; font-weight: 700; padding: 7px 14px; border-radius: 999px; border: 2px solid #10233a; background: #fff; color: #10233a; cursor: pointer; text-decoration: none; }
.tour-card button.tc-next { background: linear-gradient(110deg, var(--w2), var(--w1)); border-color: transparent; }
.tour-card .tc-step { margin-left: auto; font-size: 0.8rem; color: #4a5d70; }
@media (max-width: 899px) { .tour-card { left: 12px !important; right: 12px; bottom: 12px; top: auto !important; width: auto; } }

/* reduced motion: still, never hidden */
@media (prefers-reduced-motion: reduce) {
  .fx-blob, .topbar, main h1, .hero3d::before, .fx-toast, .welcome, .lu-ring, .levelup, .fx-ripple { animation: none !important; }
  .tour-ring { transition: none; }
}

/* progress page */
.me-card { padding: 16px; border-radius: 16px; border: 1px solid var(--line); background: var(--bg-elev); }
.me-top { display: flex; justify-content: space-between; gap: 10px; flex-wrap: wrap; font-weight: 700; }
.me-lvl { font: 800 1.6rem Fraunces, Georgia, serif; }
.me-bar { height: 14px; margin: 10px 0; border-radius: 999px; background: color-mix(in srgb, var(--line) 60%, transparent); overflow: hidden; }
.me-bar i { display: block; height: 100%; border-radius: inherit; background: linear-gradient(90deg, var(--w1), var(--w2), var(--w3)); transition: width 600ms ease; }
.badge-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(190px, 1fr)); gap: 12px; margin: 10px 0 18px; }
.badge { display: grid; gap: 3px; padding: 12px; border-radius: 14px; border: 1px solid var(--line); background: var(--bg-elev); }
.badge .b-ico { font-size: 1.8rem; }
.badge.got { border-color: var(--w2); box-shadow: 0 0 18px color-mix(in srgb, var(--w2) 45%, transparent); }
.badge.locked { opacity: 0.6; filter: grayscale(0.7); }
.fx-controls { display: grid; gap: 8px; margin-top: 10px; padding-top: 10px; border-top: 1px solid var(--line); }
.fx-label { margin: 0; font-weight: 700; font-size: 0.85rem; }
.fx-note { margin: 0; font-size: 0.8rem; color: var(--muted); }