/* ===========================
   Modern English Australia / Koala Spies Sydney Theme
   =========================== */

:root {
  --bg: #e7eef0;         /* very light ash/blue background */
  --card: #1f2426;       /* dark ash charcoal */
  --ink: #0f1416;        /* near-black text */
  --muted: #9aa6ac;      /* muted ash text */
  --accent: #009688;     /* TEAL BLUE (new main accent) */
  --line: #2c3234;       /* darker ash divider */
  --radius: 14px;
  --shadow: 0 6px 24px rgba(0,0,0,.25);

  --good: #2ecc71;
  --bad: #e74c3c;
}


/* ===== Instructions Block (NEW LOOK) ===== */
.instructions {
  text-align: center;
  font-family: system-ui, -apple-system, Segoe UI, Roboto, Arial, sans-serif;
  background: rgba(255,255,255,0.8);
  color: var(--ink);
  backdrop-filter: blur(6px);
  padding: 1.2rem 1.4rem;
  margin: 1rem auto;
  width: min(90%, 800px);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  font-size: 1.25rem;
  line-height: 1.5;
}

/* link button inside instructions */
.instructions .pdf-button {
  display: inline-block;
  margin-left: 0.8rem;
  padding: 0.3rem 1rem;
  background: var(--accent);
  color: #fff;
  border-radius: var(--radius);
  text-decoration: none;
  font-size: 1rem;
}
.instructions .pdf-button:hover {
  opacity: .9;
}

/* ===== Header ===== */
header {
  background: var(--card);
  color: var(--accent);
  text-align: center;
  padding: 1.5rem;
  box-shadow: var(--shadow);
}
header h1 {
  margin: 0;
  font-size: 1.8rem;
}
header p {
  margin: 0.3rem 0 0;
  color: var(--muted);
}

/* ===== Audio Section ===== */
.audio-section {
  text-align: center;
  padding: 1rem;
}
audio {
  width: 90%;
  max-width: 700px;
  border-radius: var(--radius);
}

/* ===== Progress Bar ===== */
.progress-container {
  width: 100%;
  background: #ddd;
  height: 12px;
  margin: 1rem 0 1.5rem;
}
.progress-bar {
  height: 100%;
  width: 0%;
  background: var(--accent);
  transition: width 0.4s ease;
}

/* ===== Verse Cards ===== */
main {
  max-width: 900px;
  margin: auto;
  padding: 1rem;
}

.verse-card {
  background: white;
  padding: 1.5rem 1.8rem;
  margin-bottom: 1.5rem;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

/* ===== Each line in the exercise (IMPROVED SPACING) ===== */
.gap-line {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.4rem;

  background: #fafafa;
  padding: 0.7rem 0.9rem;
  border-left: 4px solid var(--accent);
  border-radius: 10px;
  font-size: 1.15rem;
  margin: 0.8rem 0;
  box-shadow: 0 2px 7px rgba(0,0,0,.08);
}

/* ===== Input Styling (Improved) ===== */
input.gap {
  width: 120px;
  padding: 6px 8px;
  margin: 0 4px;
  border: 2px solid var(--muted);
  border-radius: 8px;
  font-size: 1rem;
  transition: all 0.25s ease;
}

/* Correct + Incorrect Styles (DYNAMIC) */
input.gap.correct {
  border-color: var(--good);
  background: #eafff1;
  box-shadow: 0 0 10px rgba(46,204,113,.4);
}
input.gap.incorrect {
  border-color: var(--bad);
  background: #ffecec;
  animation: shake 0.25s ease;
}

/* input shake animation */
@keyframes shake {
  0% { transform: translateX(0); }
  25% { transform: translateX(3px); }
  50% { transform: translateX(-3px); }
  75% { transform: translateX(2px); }
  100% { transform: translateX(0); }
}

/* ===== Mobile ===== */
@media (max-width: 600px) {
  input.gap {
    width: 80px;
    font-size: 0.9rem;
  }
  .gap-line {
    font-size: 1rem;
    padding: 0.6rem;
  }
}

/* ===== Footer ===== */
footer {
  background: var(--card);
  color: var(--ink-light, #f5f5f5);
  text-align: center;
  padding: 2rem 1rem;
  margin-top: 3rem;
  border-top: 3px solid var(--accent);
  box-shadow: 0 -4px 12px rgba(0,0,0,.3);
}

footer p {
  margin: 0 0 1rem;
  font-size: 1rem;
  color: var(--muted);
}

.footer-nav {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 0.8rem;
}

.footer-nav a {
  background: #1e1e1e;
  color: var(--accent);
  text-decoration: none;
  padding: 0.5rem 1rem;
  border-radius: var(--radius);
  border: 1px solid var(--line);
  transition: all 0.25s ease;
  font-size: 0.95rem;
  box-shadow: var(--shadow);
}

.footer-nav a:hover {
  background: var(--accent);
  color: #fff;
  transform: translateY(-2px);
  box-shadow: 0 6px 24px rgba(0,0,0,.35);
}

/* ===== Background Video Overlay ===== */
body::before {
  content: "";
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: black;
  z-index: -3;
}

#bg-video {
  position: fixed;
  top: 50%;
  left: 50%;
  min-width: 100%;
  min-height: 100%;
  transform: translate(-50%, -50%);
  opacity: 0.35;
  z-index: -2;
}