/* Importing Google Fonts - Space Grotesk + JetBrains Mono */
@import url("https://fonts.googleapis.com/css2?family=Space+Grotesk:wght@400;500;600;700&family=JetBrains+Mono:wght@500&display=swap");

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: "Space Grotesk", sans-serif;
}

:root {
  --bg: #0c0d13;
  --tile: #14161f;
  --tile-border: #232634;
  --text: #f2f3f7;
  --muted: #8a8fa8;
  --violet: #7c5cff;
  --cyan: #22d3ee;
  --pink: #ff4ecd;
  --green: #22c55e;
  --red: #ff3d63;
}

/* Lets the conic border angle animate smoothly */
@property --angle {
  syntax: "<angle>";
  initial-value: 0deg;
  inherits: false;
}

body {
  min-height: 100vh;
  background:
    linear-gradient(rgba(255, 255, 255, 0.025) 1px, transparent 1px) 0 0 / 40px 40px,
    linear-gradient(90deg, rgba(255, 255, 255, 0.025) 1px, transparent 1px) 0 0 / 40px 40px,
    var(--bg);
  color: var(--text);
}

.wrap {
  max-width: 1160px;
  margin: 0 auto;
  padding: 80px 20px;
}

/* ---------- Intro ---------- */
.intro {
  max-width: 640px;
  margin: 0 auto 52px;
  text-align: center;
}

.eyebrow {
  display: inline-block;
  padding: 6px 14px;
  border: 1px solid var(--tile-border);
  border-radius: 999px;
  color: var(--cyan);
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.intro h1 {
  margin: 16px 0 12px;
  font-size: clamp(2.2rem, 5vw, 3.4rem);
  font-weight: 700;
  letter-spacing: -0.03em;
}

.intro h1 span {
  background: linear-gradient(90deg, var(--violet), var(--pink), var(--cyan));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.intro p {
  color: var(--muted);
  font-size: 1.05rem;
  line-height: 1.6;
}

/* ---------- Grid of tiles ---------- */
.grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 18px;
}

.tile {
  position: relative;
  display: grid;
  place-items: center;
  min-height: 180px;
  padding: 30px 16px 44px;
  border: 1px solid var(--tile-border);
  border-radius: 20px;
  background: var(--tile);
}

.tile-name {
  position: absolute;
  left: 18px;
  bottom: 14px;
  color: var(--muted);
  font-size: 0.78rem;
  font-weight: 500;
}

/* ---------- Base button ---------- */
.btn {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 14px 26px;
  border: 0;
  border-radius: 14px;
  background: #23263a;
  color: var(--text);
  font-size: 1rem;
  font-weight: 600;
  white-space: nowrap;
  cursor: pointer;
  overflow: hidden;
  isolation: isolate;
  transition: transform 0.2s, box-shadow 0.3s, background 0.3s, color 0.3s;
  -webkit-tap-highlight-color: transparent;
}

.btn:focus-visible,
.btn-push:focus-visible {
  outline: 3px solid rgba(34, 211, 238, 0.6);
  outline-offset: 3px;
}

/* 01 · Ripple */
.btn-ripple {
  background: var(--violet);
  box-shadow: 0 10px 30px -10px rgba(124, 92, 255, 0.8);
}

.ripple {
  position: absolute;
  z-index: -1;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.45);
  transform: scale(0);
  animation: ripple 0.65s ease-out forwards;
  pointer-events: none;
}

@keyframes ripple {
  to {
    transform: scale(1);
    opacity: 0;
  }
}

/* 02 · Magnetic (moved by script.js) */
.btn-magnetic {
  background: linear-gradient(135deg, var(--pink), var(--violet));
  box-shadow: 0 12px 30px -12px rgba(255, 78, 205, 0.8);
  transition: transform 0.25s cubic-bezier(0.2, 0.8, 0.2, 1);
}

.btn-magnetic span {
  display: inline-block;
  transition: transform 0.25s cubic-bezier(0.2, 0.8, 0.2, 1);
}

/* 03 · Shine sweep (on hover + every few seconds) */
.btn-shine {
  border: 1px solid #34384f;
  background: linear-gradient(180deg, #2b2f46, #1c1f2e);
}

.btn-shine::after {
  content: "";
  position: absolute;
  top: 0;
  left: -75%;
  width: 50%;
  height: 100%;
  background: linear-gradient(100deg, transparent, rgba(255, 255, 255, 0.45), transparent);
  transform: skewX(-20deg);
  animation: shine 3.2s ease-in-out infinite;
}

.btn-shine:hover::after {
  animation: shine 0.9s ease-in-out;
}

@keyframes shine {
  0% {
    left: -75%;
  }
  35%,
  100% {
    left: 130%;
  }
}

/* 04 · Liquid fill */
.btn-liquid {
  border: 2px solid var(--cyan);
  background: transparent;
  color: var(--cyan);
}

.btn-liquid .liquid {
  position: absolute;
  z-index: -1;
  left: -50%;
  top: 110%;
  width: 200%;
  aspect-ratio: 1;
  border-radius: 42%;
  background: var(--cyan);
  animation: spinWave 5s linear infinite;
  transition: top 0.8s cubic-bezier(0.3, 0.7, 0.3, 1);
}

.btn-liquid:hover,
.btn-liquid:focus-visible {
  color: #06212a;
}

.btn-liquid:hover .liquid,
.btn-liquid:focus-visible .liquid {
  top: -90%;
}

@keyframes spinWave {
  to {
    transform: rotate(360deg);
  }
}

/* 05 · Loading → success */
.btn-submit {
  display: grid;
  min-width: 150px;
  background: var(--green);
  color: #052e12;
  box-shadow: 0 10px 30px -12px rgba(34, 197, 94, 0.8);
}

.btn-submit .state {
  grid-area: 1 / 1;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  transition: opacity 0.25s, transform 0.25s;
}

.btn-submit .loading,
.btn-submit .done {
  opacity: 0;
  transform: translateY(14px);
}

.btn-submit.is-loading .idle,
.btn-submit.is-done .idle {
  opacity: 0;
  transform: translateY(-14px);
}

.btn-submit.is-loading .loading,
.btn-submit.is-done .done {
  opacity: 1;
  transform: none;
}

.btn-submit.is-done {
  background: #16a34a;
  color: #fff;
}

.btn-submit svg {
  width: 20px;
  height: 20px;
  fill: none;
  stroke: currentColor;
  stroke-width: 3;
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-dasharray: 24;
  stroke-dashoffset: 24;
}

.btn-submit.is-done svg {
  animation: draw 0.4s 0.15s ease forwards;
}

@keyframes draw {
  to {
    stroke-dashoffset: 0;
  }
}

.spin {
  width: 20px;
  height: 20px;
  border: 3px solid rgba(5, 46, 18, 0.25);
  border-top-color: #052e12;
  border-radius: 50%;
  animation: spinWave 0.7s linear infinite;
}

/* 06 · Spinning conic-gradient border */
.btn-border {
  padding: 2px;
  background: conic-gradient(from var(--angle), var(--pink), var(--violet), var(--cyan), var(--pink));
  animation: rotateAngle 3s linear infinite;
}

.btn-border span {
  display: block;
  padding: 12px 24px;
  border-radius: 12px;
  background: var(--tile);
  transition: background 0.3s;
}

.btn-border:hover span {
  background: rgba(20, 22, 31, 0.6);
}

@keyframes rotateAngle {
  to {
    --angle: 360deg;
  }
}

/* 07 · 3D push */
.btn-push {
  padding: 0;
  border: 0;
  border-radius: 14px;
  background: #a3173a;
  cursor: pointer;
  -webkit-tap-highlight-color: transparent;
}

.btn-push .front {
  display: block;
  padding: 14px 30px;
  border-radius: 14px;
  background: var(--red);
  color: #fff;
  font-size: 1rem;
  font-weight: 700;
  transform: translateY(-6px);
  transition: transform 0.25s cubic-bezier(0.3, 0.7, 0.4, 1.5);
}

.btn-push:hover .front {
  transform: translateY(-8px);
}

.btn-push:active .front,
.btn-push.is-pressed .front {
  transform: translateY(-2px);
  transition-duration: 0.05s;
}

/* 08 · Neon */
.btn-neon {
  border: 2px solid #5ef1ff;
  background: transparent;
  color: #5ef1ff;
  text-shadow: 0 0 8px rgba(94, 241, 255, 0.8);
  box-shadow: 0 0 12px rgba(94, 241, 255, 0.5), inset 0 0 12px rgba(94, 241, 255, 0.3);
  animation: neonPulse 2.4s ease-in-out infinite;
}

.btn-neon:hover {
  background: #5ef1ff;
  color: #04161a;
  text-shadow: none;
  box-shadow: 0 0 30px rgba(94, 241, 255, 0.9), 0 0 60px rgba(94, 241, 255, 0.5);
}

@keyframes neonPulse {
  50% {
    box-shadow: 0 0 24px rgba(94, 241, 255, 0.75), inset 0 0 18px rgba(94, 241, 255, 0.45);
  }
}

/* 09 · Icon slide */
.btn-arrow {
  background: #f2f3f7;
  color: #0c0d13;
  padding-right: 22px;
}

.btn-arrow svg {
  width: 18px;
  height: 18px;
  fill: none;
  stroke: currentColor;
  stroke-width: 2.4;
  stroke-linecap: round;
  stroke-linejoin: round;
  transition: transform 0.3s cubic-bezier(0.3, 0.7, 0.3, 1);
}

.btn-arrow span {
  transition: transform 0.3s cubic-bezier(0.3, 0.7, 0.3, 1);
}

.btn-arrow:hover span {
  transform: translateX(-4px);
}

.btn-arrow:hover svg {
  transform: translateX(6px);
}

/* 10 · Confetti */
.btn-confetti {
  background: linear-gradient(135deg, #ffb020, #ff5e3a);
  color: #2a0f00;
  box-shadow: 0 10px 30px -12px rgba(255, 140, 40, 0.9);
  overflow: visible;
}

.btn-confetti:active {
  transform: scale(0.95);
}

.confetti {
  position: fixed;
  z-index: 50;
  width: 8px;
  height: 12px;
  border-radius: 2px;
  pointer-events: none;
}

/* 11 · Hold to confirm */
.btn-hold {
  border: 2px solid var(--red);
  background: transparent;
  color: var(--red);
  user-select: none;
}

.btn-hold .hold-fill {
  position: absolute;
  z-index: -1;
  inset: 0;
  background: var(--red);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.35s ease;
}

.btn-hold.is-holding .hold-fill {
  transform: scaleX(1);
  transition: transform var(--hold, 1.2s) linear;
}

.btn-hold.is-holding,
.btn-hold.is-done {
  color: #fff;
}

.btn-hold.is-done .hold-fill {
  transform: scaleX(1);
}

.btn-hold.is-done {
  animation: shake 0.4s;
}

@keyframes shake {
  25% {
    transform: translateX(-4px);
  }
  75% {
    transform: translateX(4px);
  }
}

/* 12 · Copy */
.btn-copy {
  gap: 12px;
  padding: 8px 8px 8px 14px;
  border: 1px solid #2c3044;
  background: #0f1118;
}

.btn-copy code {
  font-family: "JetBrains Mono", monospace;
  font-size: 0.88rem;
  color: #c7cbe0;
}

.copy-label {
  min-width: 84px;
  padding: 7px 12px;
  border-radius: 9px;
  background: #23263a;
  font-size: 0.85rem;
  transition: background 0.3s, color 0.3s;
}

.btn-copy.is-copied .copy-label {
  background: var(--green);
  color: #052e12;
}

/* ---------- Responsive ---------- */
@media (max-width: 1020px) {
  .grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

@media (max-width: 760px) {
  .grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 480px) {
  .grid {
    grid-template-columns: 1fr;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}