/* PAGE LAYOUT */
* {
  padding: 0;
  margin: 0;
  box-sizing: border-box;
  font-family: "Raleway", sans-serif;
}

:root {
  --ordinary-color: #ffffff;
  --main-color: #00abf0;
  --bg-color: #000000;
  --o-color: rgb(192, 64, 85);
  --secondary-bg-color: #112e42;
}

body {
  height: 100vh;
  background: linear-gradient(135deg, var(--bg-color), var(--secondary-bg-color));
}

.wrapper {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  text-align: center;
}

/* MODE SELECTORS */
#mode, #difficulty {
  display: block;
  margin: 0 auto 1em auto;
  padding: 0.7em 1em;
  font-size: 1rem;
  border-radius: 8px;
  border: 2px solid var(--main-color);
  background: var(--bg-color);
  color: var(--main-color);
  cursor: pointer;
}

#mode:hover, #difficulty:hover {
  background: transparent;
}

/* BOARD */
.container {
  width: 70vmin;
  height: 70vmin;
  display: flex;
  flex-wrap: wrap;
  gap: 2vmin;
}

.button-opt {
  background: transparent;
  border: 3px solid var(--main-color);
  height: 22vmin;
  width: 22vmin;
  border-radius: 8px;
  color: var(--main-color);
  font-size: 12vmin;
  cursor: pointer;
  transition: 0.25s;
}

.button-opt:hover {
  background: rgba(0, 171, 240, 0.08);
  transform: scale(1.05);
}

/* POPUP & RESTART */
#restart {
  font-size: 1.3em;
  margin-top: 1.5em;
  padding: 1em;
  border-radius: 8px;
  background: var(--bg-color);
  color: var(--main-color);
  border: none;
  cursor: pointer;
  display: block;
  margin-inline: auto;
}

#restart:hover {
  background: transparent;
  border: 3px solid var(--main-color);
}

/* POPUP */
.popup {
  background: linear-gradient(135deg, var(--secondary-bg-color), var(--bg-color));
  height: 100%;
  width: 100%;
  position: absolute;
  z-index: 2;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 1em;
  font-size: 12vmin;
  color: var(--main-color);
  opacity: 0;
  transform: scale(0.8);
  transition: all 0.3s ease;
}

.popup.show {
  opacity: 1;
  transform: scale(1);
}

#new-game {
  font-size: 0.6em;
  padding: 0.5rem 1em;
  background: var(--main-color);
  color: var(--bg-color);
  border-radius: 0.3em;
  border: none;
  cursor: pointer;
}

#new-game:hover {
  border: 3px solid var(--main-color);
  background: transparent;
  color: var(--main-color);
}

#message {
  color: var(--main-color);
  text-align: center;
  font-size: 1em;
}

.popup.hide {
  display: none;
}

/* ANIMATIONS */
.button-opt.place {
  animation: pop 0.3s ease;
}

@keyframes pop {
  0% { transform: scale(0); opacity: 0; }
  70% { transform: scale(1.2); opacity: 1; }
  100% { transform: scale(1); }
}

.button-opt.win {
  background: rgba(0, 171, 240, 0.4);
  border-color: #00ffea;
  animation: flash 0.5s ease infinite alternate;
}

@keyframes flash {
  0% { box-shadow: 0 0 10px #00ffea; }
  100% { box-shadow: 0 0 25px #00ffea; }
}

/* MOBILE */
@media (max-width: 600px) {
  .container {
    width: 85vmin;
    height: 85vmin;
  }

  .button-opt {
    height: 26vmin;
    width: 26vmin;
    font-size: 14vmin;
  }
}

/* FOOTER LAYOUT */
.footer{
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    background: var(--bg-color);
    padding: 2rem 9%;
    cursor: pointer;
    width: 100%;
    position: absolute;
    top: 120%;
}

.footer-text p{
    font-size: 16px;
    color: var(--main-color);
}

.footer span {
    color: var(--main-color);
    font-size: 16px;
    cursor: pointer;
}

.footer span:hover {
    color: var(--o-color);
}

.footer {
  gap: 1rem;
  text-align: center;
}