/* ============================================================
   RallyAI Studio — projector-first live tennis effects
   Design language: cinematic black canvas, glass controls,
   one accent (electric lime → court), generous whitespace.
   ============================================================ */

:root {
  --bg: #050608;
  --accent: #d6ff3f; /* electric court lime */
  --accent-2: #19e3ff; /* cyan rally */
  --glass: rgba(20, 22, 28, 0.62);
  --glass-brd: rgba(255, 255, 255, 0.1);
  --text: #f4f6f8;
  --muted: rgba(244, 246, 248, 0.55);
  --shadow: 0 12px 40px rgba(0, 0, 0, 0.55);
  --font:
    -apple-system, BlinkMacSystemFont, "SF Pro Display", "Segoe UI", Roboto,
    "Helvetica Neue", system-ui, sans-serif;
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  -webkit-tap-highlight-color: transparent;
}
html,
body {
  height: 100%;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font);
  overflow: hidden;
}
body {
  position: fixed;
  inset: 0;
}

/* ---------------- Projection stage ---------------- */
#stage {
  position: absolute;
  inset: 0;
  background: radial-gradient(120% 90% at 50% -10%, #0d1016 0%, #050608 60%);
}

#cam {
  position: absolute;
  width: 1px;
  height: 1px;
  opacity: 0;
  pointer-events: none;
}
.offscreen {
  display: none;
}

#output {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  display: block;
  background: #000;
}

/* ---------------- Splash ---------------- */
.splash {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 28px;
  z-index: 30;
  background: radial-gradient(
    110% 80% at 50% 30%,
    rgba(13, 16, 22, 0.7),
    rgba(5, 6, 8, 0.96)
  );
  backdrop-filter: blur(6px);
  transition:
    opacity 0.6s ease,
    visibility 0.6s;
}
.splash.gone {
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
}
.brand {
  text-align: center;
}
.brand-mark {
  font-size: 14px;
  color: var(--accent);
  text-shadow: 0 0 24px var(--accent);
  margin-bottom: 18px;
}
@keyframes pulse {
  0%,
  100% {
    opacity: 0.5;
    transform: scale(0.9);
  }
  50% {
    opacity: 1;
    transform: scale(1.25);
  }
}
.brand h1 {
  font-size: clamp(40px, 8.5vw, 96px);
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1;
  perspective: 700px;
}
.brand h1 span {
  color: var(--accent);
}
/* per-character spans created by hero.js */
.brand h1 .char {
  display: inline-block;
  will-change: transform, opacity, filter;
  transform-style: preserve-3d;
}
.brand h1 .char.space {
  width: 0.28em;
}

/* drifting ambient glow behind the title */
.hero-glow {
  position: absolute;
  width: 70vw;
  height: 70vw;
  max-width: 760px;
  max-height: 760px;
  border-radius: 50%;
  background: radial-gradient(
    circle,
    rgba(214, 255, 63, 0.18) 0%,
    rgba(25, 227, 255, 0.08) 38%,
    transparent 66%
  );
  filter: blur(14px);
  pointer-events: none;
  z-index: -1;
}

/* concentric court rings that breathe */
.hero-rings {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  pointer-events: none;
  z-index: -1;
}
.hero-rings span {
  position: absolute;
  border: 1px solid rgba(255, 255, 255, 0.06);
  border-radius: 50%;
  width: 280px;
  height: 280px;
}
.hero-rings span:nth-child(2) {
  width: 460px;
  height: 460px;
}
.hero-rings span:nth-child(3) {
  width: 660px;
  height: 660px;
}
.tagline {
  margin-top: 12px;
  color: var(--muted);
  font-size: clamp(14px, 2.2vw, 19px);
  font-weight: 400;
}

.start-btn {
  padding: 16px 42px;
  border: none;
  border-radius: 100px;
  background: var(--accent);
  color: #0a0c05;
  font-weight: 700;
  font-size: 18px;
  letter-spacing: 0.01em;
  cursor: pointer;
  box-shadow: 0 8px 30px rgba(214, 255, 63, 0.35);
  transition:
    transform 0.18s ease,
    box-shadow 0.18s ease;
}
.start-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 14px 40px rgba(214, 255, 63, 0.5);
}
.start-btn:active {
  transform: translateY(0);
}
.splash-status {
  color: var(--muted);
  font-size: 13px;
  letter-spacing: 0.04em;
}

/* ---------------- HUD (score/combo on projection) ---------------- */
.hud {
  position: absolute;
  top: 4vh;
  left: 0;
  right: 0;
  z-index: 20;
  display: flex;
  flex-direction: column;
  align-items: center;
  pointer-events: none;
  transition: opacity 0.3s;
}
.hud.hidden {
  opacity: 0;
}
.hud-score {
  font-size: clamp(48px, 11vw, 130px);
  font-weight: 800;
  line-height: 0.9;
  letter-spacing: -0.04em;
  color: #fff;
  text-shadow:
    0 4px 30px rgba(0, 0, 0, 0.6),
    0 0 50px rgba(214, 255, 63, 0.25);
}
.hud-combo {
  margin-top: 6px;
  color: var(--accent);
  font-weight: 700;
  font-size: clamp(18px, 3.5vw, 34px);
}
.hud-combo small {
  color: var(--muted);
  font-weight: 500;
  margin-left: 8px;
  font-size: 0.5em;
  text-transform: uppercase;
  letter-spacing: 0.2em;
}
.hud-combo.hidden {
  display: none;
}
.hud-combo.bump {
  animation: bump 0.3s ease;
}
@keyframes bump {
  0% {
    transform: scale(1);
  }
  40% {
    transform: scale(1.35);
  }
  100% {
    transform: scale(1);
  }
}

/* ---------------- Control dock ---------------- */
.dock {
  position: absolute;
  left: 50%;
  bottom: 22px;
  transform: translateX(-50%);
  z-index: 40;
  display: flex;
  align-items: center;
  gap: 18px;
  padding: 12px 16px;
  border-radius: 22px;
  background: var(--glass);
  border: 1px solid var(--glass-brd);
  backdrop-filter: blur(22px) saturate(1.4);
  -webkit-backdrop-filter: blur(22px) saturate(1.4);
  box-shadow: var(--shadow);
  max-width: min(94vw, 980px);
  transition:
    transform 0.4s cubic-bezier(0.2, 0.8, 0.2, 1),
    opacity 0.4s;
}
.dock.tucked {
  transform: translateX(-50%) translateY(160%);
  opacity: 0;
  pointer-events: none;
}

.dock-modes {
  display: flex;
  gap: 4px;
  padding: 4px;
  border-radius: 14px;
  background: rgba(0, 0, 0, 0.3);
}
.mode-btn {
  border: none;
  background: transparent;
  color: var(--muted);
  padding: 9px 18px;
  border-radius: 11px;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s;
  white-space: nowrap;
}
.mode-btn:hover {
  color: var(--text);
}
.mode-btn.active {
  background: var(--accent);
  color: #0a0c05;
}

.preset-rail {
  display: flex;
  gap: 8px;
  overflow-x: auto;
  scrollbar-width: none;
  max-width: 52vw;
  padding: 2px;
}
.preset-rail::-webkit-scrollbar {
  display: none;
}
.preset-chip {
  flex: 0 0 auto;
  border: 1px solid var(--glass-brd);
  background: rgba(255, 255, 255, 0.04);
  color: var(--text);
  padding: 9px 16px;
  border-radius: 12px;
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.18s;
  white-space: nowrap;
}
.preset-chip:hover {
  background: rgba(255, 255, 255, 0.1);
}
.preset-chip.active {
  border-color: var(--accent);
  color: var(--accent);
  box-shadow:
    inset 0 0 0 1px var(--accent),
    0 0 18px rgba(214, 255, 63, 0.18);
}

.dock-utils {
  display: flex;
  gap: 6px;
}
.util-btn {
  width: 42px;
  height: 42px;
  border-radius: 12px;
  border: 1px solid var(--glass-brd);
  background: rgba(255, 255, 255, 0.04);
  color: var(--text);
  font-size: 18px;
  cursor: pointer;
  display: grid;
  place-items: center;
  transition: all 0.18s;
}
.util-btn:hover {
  background: rgba(255, 255, 255, 0.12);
}
.util-btn.on {
  background: var(--accent);
  color: #0a0c05;
  border-color: var(--accent);
}

/* pull tab */
.dock-tab {
  position: absolute;
  left: 50%;
  bottom: 0;
  transform: translateX(-50%);
  z-index: 39;
  padding: 6px 22px 9px;
  border-radius: 14px 14px 0 0;
  background: var(--glass);
  border: 1px solid var(--glass-brd);
  border-bottom: none;
  color: var(--muted);
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  cursor: pointer;
  opacity: 0;
  transition: opacity 0.3s;
  backdrop-filter: blur(18px);
}
.dock-tab.show {
  opacity: 1;
}

/* ---------------- hover tooltips ---------------- */
[data-tip] {
  position: relative;
}
[data-tip]::after {
  content: attr(data-tip);
  position: absolute;
  left: 50%;
  bottom: calc(100% + 10px);
  transform: translateX(-50%) translateY(4px);
  padding: 6px 12px;
  border-radius: 9px;
  background: rgba(8, 10, 14, 0.92);
  border: 1px solid var(--glass-brd);
  color: var(--text);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.04em;
  white-space: nowrap;
  pointer-events: none;
  opacity: 0;
  transition:
    opacity 0.18s ease,
    transform 0.18s ease;
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.45);
  z-index: 60;
}
[data-tip]::before {
  content: "";
  position: absolute;
  left: 50%;
  bottom: calc(100% + 4px);
  transform: translateX(-50%) translateY(4px);
  border: 5px solid transparent;
  border-top-color: rgba(8, 10, 14, 0.92);
  opacity: 0;
  transition:
    opacity 0.18s ease,
    transform 0.18s ease;
  z-index: 60;
}
[data-tip]:hover::after,
[data-tip]:hover::before {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}

/* ---------------- adjustable parameter panel ---------------- */
.adjust-panel {
  position: absolute;
  left: 50%;
  bottom: 96px;
  transform: translateX(-50%);
  z-index: 41;
  width: min(92vw, 440px);
  padding: 16px 18px 20px;
  border-radius: 20px;
  background: var(--glass);
  border: 1px solid var(--glass-brd);
  backdrop-filter: blur(22px) saturate(1.4);
  -webkit-backdrop-filter: blur(22px) saturate(1.4);
  box-shadow: var(--shadow);
}
.adjust-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 14px;
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 0.02em;
}
.adjust-close {
  width: 34px;
  height: 34px;
  border-radius: 10px;
  border: 1px solid var(--glass-brd);
  background: rgba(255, 255, 255, 0.04);
  color: var(--text);
  font-size: 15px;
  cursor: pointer;
}
.adjust-body {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

/* toggle rows */
.adj-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
}
.adj-row > span {
  font-size: 14px;
  font-weight: 600;
  color: var(--text);
}
.adj-toggle {
  position: relative;
  width: 52px;
  height: 30px;
  border-radius: 30px;
  border: 1px solid var(--glass-brd);
  background: rgba(255, 255, 255, 0.08);
  cursor: pointer;
  flex: 0 0 auto;
  transition: background 0.2s;
}
.adj-toggle::after {
  content: "";
  position: absolute;
  top: 3px;
  left: 3px;
  width: 22px;
  height: 22px;
  border-radius: 50%;
  background: #fff;
  transition: transform 0.2s;
}
.adj-toggle.on {
  background: var(--accent);
}
.adj-toggle.on::after {
  transform: translateX(22px);
}

/* slider rows */
.adj-slider {
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.adj-slider .lbl {
  display: flex;
  justify-content: space-between;
  font-size: 14px;
  font-weight: 600;
}
.adj-slider .lbl small {
  color: var(--muted);
  font-weight: 500;
}
.adj-slider input[type="range"] {
  -webkit-appearance: none;
  appearance: none;
  width: 100%;
  height: 6px;
  border-radius: 6px;
  background: rgba(255, 255, 255, 0.14);
  outline: none;
}
.adj-slider input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 26px;
  height: 26px;
  border-radius: 50%;
  background: var(--accent);
  cursor: pointer;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.4);
}
.adj-slider input[type="range"]::-moz-range-thumb {
  width: 26px;
  height: 26px;
  border: none;
  border-radius: 50%;
  background: var(--accent);
  cursor: pointer;
}

/* ---------------- touch / iPad optimization ---------------- */
@media (pointer: coarse) {
  /* bigger tap targets */
  .mode-btn {
    padding: 12px 20px;
    font-size: 15px;
  }
  .preset-chip {
    padding: 12px 18px;
    min-height: 46px;
    display: flex;
    align-items: center;
  }
  .util-btn {
    width: 50px;
    height: 50px;
    font-size: 20px;
  }
  .dock {
    gap: 14px;
    padding: 14px 16px;
    bottom: 18px;
  }
  /* show the tip on press, since there's no hover */
  [data-tip]:active::after,
  [data-tip]:active::before {
    opacity: 1;
    transform: translateX(-50%) translateY(0);
  }
}

/* ---------------- GSAP transition sweep ---------------- */
.fx-wipe {
  position: absolute;
  inset: 0;
  z-index: 25;
  pointer-events: none;
  opacity: 0;
  background: linear-gradient(
    105deg,
    transparent 30%,
    rgba(214, 255, 63, 0.16) 44%,
    rgba(25, 227, 255, 0.22) 50%,
    rgba(214, 255, 63, 0.16) 56%,
    transparent 70%
  );
  will-change: transform, opacity;
}

.hidden {
  display: none !important;
}

@media (max-width: 720px) {
  .dock {
    flex-wrap: wrap;
    justify-content: center;
    bottom: 12px;
    gap: 10px;
  }
  .preset-rail {
    max-width: 92vw;
    order: 3;
  }
}