:root {
  --bg1: #0b1220;
  --bg2: #0e1a33;
  --card: #0f1b34cc;
  --stroke: #ffffff1f;
  --text: #eaf0ff;
  --muted: #b8c4e3;
}

html {
  background-color: var(--bg1);
}

body {
  min-height: 100vh;
  color: var(--text);
  background:
    radial-gradient(1200px 600px at 20% 10%, #1b2c62 0%, transparent 60%),
    radial-gradient(900px 500px at 85% 30%, #3a1d6f 0%, transparent 55%),
    linear-gradient(160deg, var(--bg1), var(--bg2));
  overflow-x: hidden;
}

.topbar {
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--stroke);
  background: linear-gradient(180deg, #0b1220cc, transparent);
}

.brand-dot {
  width: 10px;
  height: 10px;
  border-radius: 999px;
  background: #6ee7ff;
  box-shadow: 0 0 18px #6ee7ff99;
  display: inline-block;
  margin-right: 0.5rem;
}

.hero {
  padding: 5rem 0 2.5rem;
}

.hero h1 {
  letter-spacing: -0.02em;
  line-height: 1.05;
}

.sub {
  color: var(--muted);
  max-width: 60ch;
}

/* Grid */
.stride-grid {
  display: grid;
  grid-template-columns: repeat(6, minmax(0, 1fr));
  gap: 1rem;
}
@media (max-width: 1200px) {
  .stride-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}
@media (max-width: 576px) {
  .stride-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

/* Tile */
.stride-tile {
  position: relative;
  border-radius: 20px;
  padding: 1.35rem 1.2rem 1.6rem;
  border: 1px solid var(--stroke);
  background: linear-gradient(180deg, var(--card), #0b1220aa);
  text-decoration: none;
  color: var(--text);
  overflow: hidden;
  transform: translateY(0) scale(1);
  transition:
    transform 0.22s ease,
    border-color 0.22s ease,
    box-shadow 0.22s ease;
  box-shadow: 0 10px 30px #00000055;
  min-height: 190px;
}

.stride-tile::before {
  content: "";
  position: absolute;
  inset: -2px;
  background:
    radial-gradient(500px 250px at 20% 10%, #7aa2ff33, transparent 60%),
    radial-gradient(600px 300px at 80% 30%, #c084fc2b, transparent 55%);
  opacity: 0;
  transition: opacity 0.22s ease;
  pointer-events: none;
}

.stride-tile::after {
  content: "";
  position: absolute;
  top: -120px;
  left: -120px;
  width: 220px;
  height: 220px;
  border-radius: 999px;
  background: radial-gradient(circle, #ffffff22 0%, transparent 60%);
  transform: scale(0.6);
  opacity: 0;
  transition:
    transform 0.35s ease,
    opacity 0.35s ease;
  pointer-events: none;
}

.stride-tile:hover {
  transform: translateY(-6px) scale(1.01);
  border-color: #ffffff3b;
  box-shadow:
    0 18px 50px #00000070,
    0 0 0 1px #ffffff12 inset;
}
.stride-tile:hover::before {
  opacity: 1;
}
.stride-tile:hover::after {
  opacity: 0.9;
  transform: scale(1);
}

/* Letter + title */
.stride-letter {
  font-size: 3.1rem;
  font-weight: 850;
  letter-spacing: -0.02em;
  line-height: 1;
  margin-bottom: 0.55rem;
}

.stride-letter .main {
  display: inline-block;
  padding-top: 2px; /* prevents glyph clipping on some fonts */
  transition: transform 0.22s ease;
}

.stride-title {
  font-size: 1.15rem;
  font-weight: 650;
  color: var(--text);
  margin-bottom: 0.5rem;
}

.stride-desc {
  color: var(--muted);
  font-size: 0.95rem;
  margin-bottom: 0;
  max-width: 32ch;
}

.stride-arrow {
  position: absolute;
  right: 14px;
  bottom: 12px;
  color: #ffffff7a;
  transform: translateX(-2px);
  transition:
    transform 0.22s ease,
    color 0.22s ease;
  font-size: 1.2rem;
}
.stride-tile:hover .stride-arrow {
  transform: translateX(2px);
  color: #ffffffcc;
}

.stride-tile:hover .stride-letter .main {
  transform: translateY(-2px);
}

.hint {
  color: var(--muted);
  border: 1px solid var(--stroke);
  background: #0b122055;
  border-radius: 16px;
  padding: 1rem 1.25rem;

  transition:
    transform 0.35s cubic-bezier(0.2, 0.8, 0.2, 1),
    box-shadow 0.35s ease,
    border-color 0.35s ease;
}

.col-lg-5 {
  color: inherit;
}

.col-lg-5:visited,
.col-lg-5:active {
  color: inherit;
}

.col-lg-5 .hint {
  height: 100%;
}

.hint:hover {
  transform: translateY(-4px);
  border-color: #ffffff33;
  cursor: pointer;
  box-shadow:
    0 18px 50px #00000060,
    0 0 0 1px #ffffff12 inset,
    0 0 40px #6ee7ff22;
}

.brand-link {
  text-decoration: none;
  color: var(--text);
  position: relative;
  display: inline-block;
  letter-spacing: 0.02em;
  transition: color 0.25s ease;
}

/* Animated underline */
.brand-link::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -4px;
  width: 100%;
  height: 2px;
  background: linear-gradient(90deg, #6ee7ff, #7aa2ff);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.25s ease;
}

.brand-link:hover {
  color: #ffffff;
}

.brand-link:hover::after {
  transform: scaleX(1);
}

/* DEBUGGING */
@media (prefers-reduced-motion: reduce) {
  * {
    animation: none !important;
    transition: none !important;
  }
}

/* Start state */
.topbar,
.hero .row,
.stride-grid,
.hero .small {
  opacity: 0;
  transform: translateY(10px);
}

/* Animate in */
.topbar {
  animation: fadeUp 650ms cubic-bezier(0.2, 0.9, 0.2, 1) 80ms forwards;
}

.hero .row {
  animation: fadeUp 800ms cubic-bezier(0.2, 0.9, 0.2, 1) 140ms forwards;
}

.hero .small {
  animation: fadeUp 700ms cubic-bezier(0.2, 0.9, 0.2, 1) 220ms forwards;
}

.stride-grid {
  animation: fadeUp 800ms cubic-bezier(0.2, 0.9, 0.2, 1) 220ms forwards;
}

/* Start state */
.bonus-box {
  opacity: 0;
  transform: translateY(10px);
  animation: fadeUp 800ms cubic-bezier(0.2, 0.9, 0.2, 1) 520ms forwards;
}

/* Stagger tiles */
.stride-tile {
  opacity: 0;
  transform: translateY(14px) scale(0.985);
  animation: tileIn 720ms cubic-bezier(0.2, 0.9, 0.2, 1) forwards;
}

/* delay per tile using nth-child */
.stride-tile:nth-child(1) {
  animation-delay: 300ms;
}
.stride-tile:nth-child(2) {
  animation-delay: 370ms;
}
.stride-tile:nth-child(3) {
  animation-delay: 440ms;
}
.stride-tile:nth-child(4) {
  animation-delay: 510ms;
}
.stride-tile:nth-child(5) {
  animation-delay: 580ms;
}
.stride-tile:nth-child(6) {
  animation-delay: 650ms;
}

@keyframes fadeUp {
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes tileIn {
  0% {
    opacity: 0;
    transform: translateY(14px) scale(0.985);
    filter: blur(6px);
  }
  100% {
    opacity: 1;
    transform: translateY(0) scale(1);
    filter: blur(0);
  }
}

/* Account */
.github-link {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  text-decoration: none;
  color: var(--muted);
  font-weight: 500;
  transition:
    transform 0.25s ease,
    color 0.25s ease;
}

.github-icon {
  font-size: 1.6rem; /* makes icon bigger */
  line-height: 1;
}

.github-text {
  font-size: 0.95rem; /* controlled size */
}

.github-link:hover {
  color: #ffffff;
  transform: translateX(-2px);
  text-shadow: 0 0 10px #6ee7ff55;
}

/* STRIDE animation*/
.grad-stride {
  background: linear-gradient(90deg, #6ee7ff, #7aa2ff, #c084fc, #6ee7ff);
  background-size: 300% 100%;
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;

  animation: strideGradient 4s ease-in-out infinite;
}

@keyframes strideGradient {
  0% {
    background-position: 0% 50%;
  }
  50% {
    background-position: 100% 50%;
  }
  100% {
    background-position: 0% 50%;
  }
}

/* Score */
.score-bar {
  margin-top: 4rem;
  padding: 1rem 1.5rem;
  border-radius: 16px;

  display: flex;
  justify-content: space-between;
  align-items: center;

  background: rgba(255, 255, 255, 0.05);
  border: 1px solid #ffffff1a;
  backdrop-filter: blur(10px);

  color: var(--text);
  font-weight: 500;
}

.score-label {
  color: var(--muted);
  letter-spacing: 0.05em;
}

.score-value {
  font-weight: 700;
  font-size: 1.1rem;
}

.e-note {
  font-family:
    ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono",
    "Courier New", monospace;
  font-size: 0.95rem;
  color: rgba(234, 240, 255, 0.7);
  background: rgba(11, 18, 32, 0.55);
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 14px;
  padding: 0.75rem 1rem;
  display: inline-block;
  letter-spacing: 0.02em;

  /* subtle "signal interference" vibe */
  filter: blur(0.2px);
  text-shadow:
    1px 0 rgba(255, 0, 80, 0.25),
    -1px 0 rgba(0, 200, 255, 0.2);
  animation: eeFlicker 2.4s infinite;
}

@keyframes eeFlicker {
  0%,
  100% {
    opacity: 0.85;
    transform: translateY(0);
  }
  40% {
    opacity: 0.65;
    transform: translateY(-1px);
  }
  55% {
    opacity: 0.9;
    transform: translateY(0);
  }
  70% {
    opacity: 0.75;
    transform: translateY(1px);
  }
}

.bonus-box {
  color: var(--text);
  display: block;
  margin-top: 1.5rem;
  border-radius: 16px;
  padding: 1.2rem 1.4rem;
  background: rgba(15, 30, 56, 0.35); /* lighter */
  border: 1px solid rgba(255, 255, 255, 0.12);
  backdrop-filter: blur(6px);
  box-shadow:
    0 10px 30px rgba(0, 0, 0, 0.35),
    0 0 40px rgba(34, 211, 238, 0.08); /* subtle glow */
  transition:
    transform 0.12s ease,
    box-shadow 0.12s ease;
}

.bonus-box:hover {
  transform: translateY(-2px);
  box-shadow:
    0 14px 40px rgba(0, 0, 0, 0.4),
    0 0 60px rgba(192, 132, 252, 0.18);
}

.bonus-title {
  font-weight: 800;
  letter-spacing: 0.02em;
}

.bonus-desc {
  color: var(--muted);
  font-size: 0.95rem;
  margin-top: 0.25rem;
}

.bonus-cta {
  white-space: nowrap;
  font-weight: 800;
  color: rgba(234, 240, 255, 0.9);
  padding: 0.25rem 0.6rem;
  border-radius: 999px;
  border: 1px solid rgba(255, 255, 255, 0.14);
  background: rgba(11, 18, 32, 0.45);
}

/* Progress bar (Bootstrap) */
.score-progress {
  height: 12px;
  border-radius: 999px;
  overflow: hidden;
  margin-top: 0.75rem;

  background: rgba(255, 255, 255, 0.06);
  border: 1px solid #ffffff1a;
  backdrop-filter: blur(10px);
}

.score-progress .progress-bar {
  border-radius: 999px;
  background: linear-gradient(90deg, #6ee7ff, #7aa2ff, #c084fc);
  transition: width 300ms ease;
}

/* Modal */

.start-here-card {
  border: 1px solid var(--stroke);
  background: rgba(11, 18, 32, 0.45);
  border-radius: 16px;
  padding: 0.9rem 1.1rem;
  max-width: 52ch;
}

.first-visit-modal {
  background: linear-gradient(
    180deg,
    rgba(15, 27, 52, 0.9),
    rgba(11, 18, 32, 0.92)
  );
  border: 1px solid rgba(255, 255, 255, 0.14);
  border-radius: 18px;
  backdrop-filter: blur(10px);
  color: var(--text);
  box-shadow: 0 20px 70px rgba(0, 0, 0, 0.65);
}

/* Pills */
/* Tile score pills */
.tile-pills {
  position: relative;
  z-index: 2; /* ensure above tile ::before glow */
  display: flex;
  gap: 0.5rem;
  margin: 0.25rem 0 0.75rem;
  flex-wrap: wrap;
}

.badge-soft {
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.14);
  color: var(--muted);
  font-weight: 650;
  padding: 0.35rem 0.6rem;
}

/* When 3/3 */
.badge-soft.is-done {
  color: rgba(234, 240, 255, 0.95);
  border-color: rgba(110, 231, 255, 0.35);
  box-shadow: 0 0 18px rgba(110, 231, 255, 0.12);
}

.tile-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
}

.tile-header .badge-soft {
  margin-top: 6px; /* aligns better with the S */
}