/* ====================================
   MOBILE-FIRST LANDING PAGE
   ==================================== */

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

body.landing-body {
  margin: 0;
  padding: 0;
  min-height: 100dvh; /* better on iOS/Samsung */
  background: radial-gradient(circle at top, #1d4ed8 0, #00172e 65%);
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI",
    sans-serif;
  -webkit-font-smoothing: antialiased;
  color: #e5e7eb;
}

.landing-container {
  min-height: 100dvh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 16px;
}

/* Card / pill that holds everything */
.landing-card {
  position: relative;
  width: 100%;
  max-width: 380px;
  padding: 18px 16px 20px;
  border-radius: 24px;

  /* Soft inner gradient */
  background:
    linear-gradient(
      145deg,
      rgba(255, 255, 255, 0.05) 0%,
      rgba(56, 189, 248, 0.07) 38%,
      rgba(15, 23, 42, 0.92) 100%
    );

  border: 1px solid rgba(148, 163, 184, 0.25);

  /* Base shadow (also animated) */
  box-shadow:
    0 18px 40px rgba(15, 23, 42, 0.85),
    0 0 40px rgba(56, 189, 248, 0.16);

  text-align: center;
  overflow: hidden;                    /* so gloss/shimmer stay clipped */
  -webkit-backdrop-filter: blur(4px);
  backdrop-filter: blur(4px);

  /* Fade-in + glow pulse */
  animation:
    landingFadeIn 0.6s ease-out forwards,
    cardGlowPulse 4.8s ease-in-out 0.6s infinite;

  opacity: 0;
}

/* Top gloss + shimmer layer */
.landing-card::before {
  content: "";
  position: absolute;
  top: -40%;
  left: -60%;
  width: 220%;
  height: 55%;
  border-radius: 50%;
  background: linear-gradient(
    120deg,
    transparent 0%,
    rgba(255, 255, 255, 0.22) 30%,
    rgba(255, 255, 255, 0.35) 45%,
    transparent 70%
  );
  opacity: 0;
  pointer-events: none;
  mix-blend-mode: screen;
  animation: cardShimmer 6s linear 1.2s infinite;
}

/* Inner shadow for depth */
.landing-card::after {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: inherit;
  box-shadow:
    inset 0 0 18px rgba(15, 23, 42, 0.85),
    inset 0 0 32px rgba(15, 23, 42, 0.75);
  pointer-events: none;
  mix-blend-mode: multiply;
}

/* Fade-in animation for the card */
@keyframes landingFadeIn {
  from {
    opacity: 0;
    transform: translateY(18px) scale(0.98);
  }
  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

/* Neon title */
.landing-neon-title {
  margin: 0 0 14px 0;
  font-size: 1.5rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.26em;
  color: #e9d5ff;
  text-shadow:
    0 0 3px #c084fc,
    0 0 6px #a855f7;
}

/* Simon rotating lights */
.simon-animation {
  position: relative;
  width: 72vw;
  max-width: 260px;
  height: auto;
  margin: 4px auto 18px auto;
  aspect-ratio: 1 / 1;
}

.simon-frame {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: contain;
  opacity: 0;
  transition: opacity 0.7s ease-in-out;
}

/* Sequential frame animation */
.frame-yellow {
  animation: simonCycle 4s infinite;
  animation-delay: 0s;
}
.frame-green {
  animation: simonCycle 4s infinite;
  animation-delay: 1s;
}
.frame-blue {
  animation: simonCycle 4s infinite;
  animation-delay: 2s;
}
.frame-red {
  animation: simonCycle 4s infinite;
  animation-delay: 3s;
}

@keyframes simonCycle {
  0%   { opacity: 0; }
  5%   { opacity: 1; }
  25%  { opacity: 1; }
  30%  { opacity: 0; }
  100% { opacity: 0; }
}

/* Soft glow pulse around the card */
@keyframes cardGlowPulse {
  0%,
  100% {
    box-shadow:
      0 18px 40px rgba(15, 23, 42, 0.85),
      0 0 40px rgba(56, 189, 248, 0.16);
  }
  50% {
    box-shadow:
      0 24px 50px rgba(15, 23, 42, 0.95),
      0 0 60px rgba(56, 189, 248, 0.3);
  }
}

/* Shimmer sweep across the top gloss */
@keyframes cardShimmer {
  0% {
    transform: translateX(-40%);
    opacity: 0;
  }
  10% {
    opacity: 0.7;
  }
  28% {
    transform: translateX(40%);
    opacity: 0;
  }
  100% {
    transform: translateX(40%);
    opacity: 0;
  }
}

/* Landing START button (index_01) – green pill with pulse */
.landing-start-btn {
  width: 100%;
  margin-top: 14px;
  padding: 14px 0;
  border-radius: 999px;
  border: 1px solid rgba(255, 255, 255, 0.55); /* clean 1px stroke */
  background: linear-gradient(135deg, #22dd66 0%, #16a34a 100%);
  color: #ffffff;
  font-size: 1.15rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  cursor: pointer;

  box-shadow:
    0 4px 12px rgba(34, 197, 94, 0.45),
    inset 0 0 6px rgba(255, 255, 255, 0.25);

  animation: startPulse 2.2s ease-in-out infinite;
  transition: transform 0.15s ease, box-shadow 0.15s ease;
}

/* Button pulse (landing START) */
@keyframes startPulse {
  0% {
    transform: translateY(0) scale(1);
    box-shadow: 0 6px 16px rgba(34, 197, 94, 0.45);
  }
  50% {
    transform: translateY(-1px) scale(1.03);
    box-shadow: 0 10px 24px rgba(34, 197, 94, 0.6);
  }
  100% {
    transform: translateY(0) scale(1);
    box-shadow: 0 6px 16px rgba(34, 197, 94, 0.45);
  }
}

/* Hover (desktop only) */
@media (hover: hover) and (pointer: fine) {
  .landing-start-btn:hover {
    transform: scale(1.045);
    box-shadow:
      0 12px 32px rgba(34, 197, 94, 0.85),
      inset 0 0 10px rgba(255, 255, 255, 0.35);
  }
}

/* Active/tapped landing button */
.landing-start-btn:active {
  transform: translateY(1px) scale(0.99);
  box-shadow: 0 4px 10px rgba(34, 197, 94, 0.35);
}

/* Bevelled SINGLE PLAYER button */
.start-btn-green {
  width: 100%;
  margin-top: 12px;
  padding: 16px 0;
  border-radius: 999px;

  background: linear-gradient(135deg, #22dd66 0%, #16a34a 100%);
  color: #ffffff;
  font-size: 1.1rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  cursor: pointer;

  /* 3D BEVEL */
  border: 2px solid rgba(255, 255, 255, 0.55);
  box-shadow:
    0 6px 0 #0f3f1f,                        /* bottom hard edge */
    0 10px 16px rgba(0,0,0,0.35),           /* outer drop shadow */
    inset 0 3px 4px rgba(255,255,255,0.35), /* top inner shine */
    inset 0 -3px 6px rgba(0,0,0,0.28);      /* bottom inner shadow */

  transition: all 0.15s ease;
}

.start-btn-green:active {
  transform: translateY(4px);
  box-shadow:
    0 2px 0 #0f3f1f,
    0 4px 10px rgba(0,0,0,0.35),
    inset 0 1px 3px rgba(255,255,255,0.25),
    inset 0 -2px 4px rgba(0,0,0,0.3);
}

/* Bevelled MULTI PLAYER button */
.start-btn-orange {
  width: 100%;
  margin-top: 12px;
  padding: 16px 0;
  border-radius: 999px;

  background: linear-gradient(135deg, #ff9f1c 0%, #ff5f00 100%);
  color: #ffffff;
  font-size: 1.1rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  cursor: pointer;

  /* 3D BEVEL */
  border: 2px solid rgba(255, 255, 255, 0.55);
  box-shadow:
    0 6px 0 #7a2d00,                        /* bottom hard edge */
    0 10px 16px rgba(0,0,0,0.35),           /* outer drop shadow */
    inset 0 3px 4px rgba(255,255,255,0.30), /* top highlight */
    inset 0 -3px 6px rgba(0,0,0,0.25);      /* lower shadow */

  transition: all 0.15s ease;
}

.start-btn-orange:active {
  transform: translateY(4px);
  box-shadow:
    0 2px 0 #7a2d00,
    0 4px 10px rgba(0,0,0,0.35),
    inset 0 1px 3px rgba(255,255,255,0.25),
    inset 0 -2px 4px rgba(0,0,0,0.3);
}

/* Difficulty selector pill (third pill) */
.difficulty-pill {
  width: 100%;
  margin-top: 12px;
  padding: 16px 0;
  border-radius: 999px;

  background: linear-gradient(135deg, #ee0e06 0%, #a80000 100%);
  color: #ffffff;
  font-size: 1.1rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  cursor: pointer;

  /* 3D BEVEL */
  border: 2px solid rgba(255, 255, 255, 0.55);
  box-shadow:
    0 6px 0 #7a2d00,                        /* bottom hard edge */
    0 10px 16px rgba(0,0,0,0.35),           /* outer drop shadow */
    inset 0 3px 4px rgba(255,255,255,0.30), /* top highlight */
    inset 0 -3px 6px rgba(0,0,0,0.25);      /* lower shadow */

  transition: all 0.15s ease;
}

.difficulty-pill:active {
  transform: translateY(4px);
  box-shadow:
    0 2px 0 #7a2d00,
    0 4px 10px rgba(0,0,0,0.35),
    inset 0 1px 3px rgba(255,255,255,0.25),
    inset 0 -2px 4px rgba(0,0,0,0.3);
}


/* Tiny footer */
.landing-footer {
  margin-top: 10px;
  font-size: 0.7rem;
  opacity: 0.55;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

/* ====================================
   Larger screens tweaks
   ==================================== */

@media (min-width: 640px) {
  .landing-card {
    max-width: 420px;
    padding: 20px 18px 22px;
  }

  .landing-neon-title {
    font-size: 1.6rem;
  }

  .landing-start-btn {
    font-size: 1.05rem;
  }
}

/* Universal glossy input pill */
.landing-input {
  width: 100%;
  padding: 14px 18px;
  border-radius: 999px;
  border: 1px solid rgba(255,255,255,0.45);
  background: rgba(255,255,255,0.15);
  color: white;
  font-size: 1.05rem;
  outline: none;
  backdrop-filter: blur(4px);
}