/* ---------- BASE ---------- */
*,
*::before,
*::after {
  box-sizing: border-box;
}

:root {
  --c1: #dfe9f3;
  --c2: #e4d9ff;
  --c3: #ffd4d4;
  --brand: #6366f1;
  --cardBg: #ffffffee;
  --radius: 18px;
  font-size: 16px;
}

body {
  margin: 0;
  font-family: Poppins, Arial, sans-serif;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--c1), var(--c2), var(--c3));
  background-size: 400% 400%;
  animation: bgMove 18s ease infinite;
  padding: 2rem;
}

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

/* ---------- CARD ---------- */
.card {
  max-width: 780px;
  width: 100%;
  background: var(--cardBg);
  backdrop-filter: blur(8px);
  padding: 3rem 4rem;
  border-radius: var(--radius);
  box-shadow: 0 10px 28px rgba(0, 0, 0, 0.14);
}

h1 {
  font-size: clamp(1.4rem, 3vw, 1.8rem);
  text-align: center;
  margin: 0 0 1.2rem;
}

.instructions {
  margin: 0 0 1.6rem;
  font-size: 0.95rem;
  color: #444;
}

/* ---------- GAPS ---------- */
p {
  line-height: 1.8;
  margin: 1.2rem 0;
  font-size: 1rem;
}

.blank {
  display: inline-block;
  position: relative;
  margin: 8px 0;
  vertical-align: middle;
}

.blank input {
  width: 8.5rem;
  max-width: 42vw;
  padding: 0.4rem 0.5rem;
  font-size: 1rem;
  text-align: center;
  border: 2px solid #c9d4ff;
  border-radius: 10px;
  transition: 0.25s;
}

.blank input:focus {
  outline: none;
  border-color: var(--brand);
}

.blank.correct input {
  border-color: #4ade80;
  background: #ecfdf5;
}

.blank.wrong input {
  border: 2px solid #f87171;
  background: linear-gradient(145deg, #ffeaea, #fff6f6);
  transition: 0.3s;
  animation: shake 0.3s ease-in-out;
}

/* ---------- TOOLTIP ---------- */
.tooltip {
  cursor: pointer;
  color: var(--brand);
  font-weight: 600;
  margin-left: 0.2rem;
}

.tipbox {
  position: absolute;
  bottom: calc(100% + 6px);
  left: 50%;
  transform: translateX(-50%);
  min-width: 180px;
  max-width: 230px;
  padding: 0.55rem 0.8rem;
  background: #111;
  color: #fff;
  font-size: 0.8rem;
  line-height: 1.3;
  border-radius: 8px;
  opacity: 0;
  pointer-events: none;
  transition: 0.22s;
  z-index: 20;
  text-align: center;
}

.tipbox::after {
  content: "";
  position: absolute;
  top: 100%;
  left: 50%;
  transform: translateX(-50%) rotate(45deg);
  width: 10px;
  height: 10px;
  background: #111;
}

.tooltip:hover + .tipbox,
.tooltip:focus + .tipbox {
  opacity: 1;
  transform: translate(-50%, -6px);
}

/* ---------- BUTTON ---------- */
button {
  display: block;
  margin: 2.4rem auto 0;
  padding: 0.9rem 2.6rem;
  font-size: 1rem;
  font-weight: 600;
  border: none;
  border-radius: 40px;
  background: var(--brand);
  color: #fff;
  cursor: pointer;
  transition: 0.25s;
}

button:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 18px rgba(0, 0, 0, 0.18);
}

/* ---------- SCORE ---------- */
#score {
  text-align: center;
  font-weight: 600;
  margin-top: 1rem;
  font-size: 1.1rem;
}

/* ---------- MEDIA ---------- */
@media (max-width: 900px) {
  .card {
    padding: 2.2rem;
  }
}

/* ---------- VIDEO BG ---------- */
#bg-video {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  object-fit: cover;
  z-index: -1;
  opacity: 0.7;
  pointer-events: none;
}

/* ---------- MODAL ---------- */
.modal {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.5);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 100;
}

.modal.hidden {
  display: none;
}

.modal-content {
  background: white;
  padding: 2rem 2.5rem;
  border-radius: 16px;
  max-width: 90%;
  width: 400px;
  text-align: center;
  box-shadow: 0 15px 35px rgba(0, 0, 0, 0.2);
  animation: popUp 0.3s ease-out;
}

.modal-content h2 {
  margin-top: 0;
}

#close-modal {
  margin-top: 1.2rem;
  padding: 0.6rem 1.8rem;
  background: var(--brand);
  color: white;
  border: none;
  border-radius: 40px;
  font-weight: 600;
  cursor: pointer;
}

#close-modal:hover {
  background: #4f46e5;
}

/* ---------- ANIMATIONS ---------- */
@keyframes popUp {
  from {
    transform: scale(0.85);
    opacity: 0;
  }

  to {
    transform: scale(1);
    opacity: 1;
  }
}

@keyframes shake {
  0% {
    transform: translateX(0);
  }
  25% {
    transform: translateX(-4px);
  }
  50% {
    transform: translateX(4px);
  }
  75% {
    transform: translateX(-4px);
  }
  100% {
    transform: translateX(0);
  }
}