@import url('https://fonts.googleapis.com/css2?family=Press+Start+2P&display=swap');

:root {
  --font-main: "Open Sans", ui-sans-serif, system-ui, Inter, Roboto, "Helvetica Neue", "Arial Nova", "Nimbus Sans", Arial, sans-serif;
  --font-game: "Press Start 2P", cursive;

  --light-bg: #f0f0f0;
  --light-color: #333;
  --light-accent: #007bff;
  --light-accent-hover: #0056b3;
  --light-board-bg: #d4d4d4;
  --light-tile-bg: #b0b0b0;
  --light-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);

  --dark-bg: #0f172a;
  --dark-color: #e2e8f0;
  --dark-accent: #0ea5e9;
  --dark-accent-hover: #0284c7;
  --dark-board-bg: #1e293b;
  --dark-tile-bg: #475569;
  --dark-shadow: 0 4px 6px rgba(0, 0, 0, 0.3);

  --background: var(--light-bg);
  --text-color: var(--light-color);
  --accent-color: var(--light-accent);
  --accent-hover: var(--light-accent-hover);
  --board-bg: var(--light-board-bg);
  --tile-bg: var(--light-tile-bg);
  --shadow: var(--light-shadow);
}

body.dark-theme {
  --background: var(--dark-bg);
  --text-color: var(--dark-color);
  --accent-color: var(--dark-accent);
  --accent-hover: var(--dark-accent-hover);
  --board-bg: var(--dark-board-bg);
  --tile-bg: var(--dark-tile-bg);
  --shadow: var(--dark-shadow);
}

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

body {
  margin: 0;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: flex-start;
  background: var(--background);
  color: var(--text-color);
  font-family: var(--font-main);
  transition: background 0.3s, color 0.3s;
}

html {
  scroll-behavior: smooth;
  font-size: clamp(1rem, 0.8rem + 1vw, 1.5rem);
  line-height: 1.5;
}

.container {
  padding: 2rem 1rem;
  width: 100%;
  max-width: 1120px;
  margin: 0 auto;
}

.header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 2rem;
}

.title {
  text-align: center;
  margin: 0;
  font-family: var(--font-game);
  font-size: 1.5rem;
  color: var(--accent-color);
  text-shadow: 2px 2px 0 var(--board-bg);
}

#app {
  display: flex;
  flex-wrap: wrap;
  gap: 24px;
  align-items: flex-start;
}

.app__component {
  max-width: 32rem;
  margin: 0 auto;
}

.game-board {
  flex: 8;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  min-width: min(100%, 24rem);
  padding: 0.8rem;
  border-radius: 1rem;
  gap: 0.8rem;
  aspect-ratio: 1 / 1;
  background: var(--board-bg);
  box-shadow: var(--shadow), inset 0 0 10px rgba(0,0,0,0.2);
  border: 3px solid var(--tile-bg);
}

.game-controls {
  flex: 5;
  border-radius: 1rem;
  padding: 1.5rem;
  background: var(--board-bg);
  min-width: min(100%, 16rem);
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
  box-shadow: var(--shadow);
  border: 3px solid var(--tile-bg);
}

.game-controls__title {
  margin: 0 0 1rem 0;
  font-family: var(--font-game);
  font-size: 1rem;
  color: var(--accent-color);
}

.game-controls__btn {
  font-size: 0.8rem;
  font-family: var(--font-game);
  border-radius: 8px;
  border: none;
  display: flex;
  align-items: center;
  gap: 1ch;
  padding: 0.8em 1.2em;
  background: var(--accent-color);
  color: var(--background);
  text-transform: uppercase;
  box-shadow: 0 4px 0 color-mix(in srgb, var(--accent-color) 70%, black);
  transition: all 150ms ease-out;

  &:hover {
    background: var(--accent-hover);
    transform: translateY(-2px);
    box-shadow: 0 6px 0 color-mix(in srgb, var(--accent-hover) 70%, black);
  }

  &:active {
    transform: translateY(2px);
    box-shadow: 0 2px 0 color-mix(in srgb, var(--accent-color) 70%, black);
  }

  &:disabled {
    opacity: 50%;
    cursor: not-allowed;
    transform: translateY(0);
    box-shadow: 0 4px 0 color-mix(in srgb, var(--accent-color) 70%, black);
  }
}

.game-controls__btn-set {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 1rem;
}

.game-controls__stats {
  margin: 0.5rem 0 0 0;
  padding-left: 2ch;
  font-size: 0.9rem;
}

.tile__container {
  transition: scale 150ms ease-out;

  &.selecting {
    scale: 1.125;
  }
}

.tile {
  background: var(--tile-bg);
  width: 100%;
  height: 100%;
  border-radius: 0.5em;
  display: grid;
  place-items: center;
  box-shadow: inset 0 0 5px rgba(0,0,0,0.2);

  &::after {
    content: attr(data-num);
    font-size: 1.8rem;
    font-weight: 700;
    font-family: var(--font-game);
    line-height: 1;
    color: var(--text-color);
  }

  &.slide-left { animation: 300ms 1 ease slideleft; }
  &.slide-right { animation: 300ms 1 ease slideright; }
  &.slide-up { animation: 300ms 1 ease slideup; }
  &.slide-down { animation: 300ms 1 ease slidedown; }
  &.appear { animation: 300ms 1 cubic-bezier(0.34, 1.56, 0.64, 1) appear; }
}

@keyframes slideleft { from { translate: calc(100% + 0.8rem) 0; } to { translate: 0; } }
@keyframes slideright { from { translate: calc(-100% - 0.8rem) 0; } to { translate: 0; } }
@keyframes slideup { from { translate: 0 calc(100% + 0.8rem); } to { translate: 0; } }
@keyframes slidedown { from { translate: 0 calc(-100% - 0.8rem); } to { translate: 0; } }
@keyframes appear { from { scale: 0; } to { scale: 1; } }

/* Theme Switcher */
.theme-switcher {
  position: relative;
  width: 60px;
  height: 30px;
  background-color: var(--board-bg);
  border-radius: 15px;
  border: 2px solid var(--tile-bg);
}

#theme-toggle {
  width: 100%;
  height: 100%;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0;
  display: flex;
  align-items: center;
  justify-content: space-around;
  position: relative;
  z-index: 1;
}

#theme-toggle svg {
  width: 20px;
  height: 20px;
  color: var(--accent-color);
  transition: opacity 0.3s;
}

.theme-indicator {
  position: absolute;
  width: 24px;
  height: 24px;
  top: 1px;
  left: 1px;
  background: var(--accent-color);
  border-radius: 50%;
  transition: transform 0.3s cubic-bezier(0.7, 0, 0.3, 1);
}

body.dark-theme .theme-indicator {
  transform: translateX(30px);
}

body.dark-theme .sun { opacity: 0; }
body:not(.dark-theme) .moon { opacity: 0; }

/* Modal Styles */
.github-modal {
  position: fixed;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.24s ease;
  z-index: 10;
}

.github-modal.visible {
  opacity: 1;
  pointer-events: auto;
}

.github-modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(10, 8, 18, 0.7);
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.24s ease;
  z-index: 9;
}

.github-modal-overlay.visible {
  opacity: 1;
  pointer-events: auto;
}

.modal-content {
  background: var(--board-bg);
  border-radius: 20px;
  padding: 26px 24px;
  max-width: 380px;
  width: calc(100% - 40px);
  border: 1px solid var(--accent-color);
  box-shadow: var(--shadow);
  text-align: center;
  position: relative;
}

.modal-content h3 {
  font-family: var(--font-game);
  font-size: 1rem;
  color: var(--accent-color);
  margin: 0 0 14px 0;
}

.modal-content p {
  color: var(--text-color);
  font-size: 14px;
  line-height: 1.6;
  margin: 0 0 16px 0;
}

.github-button-wrapper {
  display: flex;
  justify-content: center;
  margin-bottom: 16px;
}

.modal-link {
  display: inline-block;
  padding: 10px 18px;
  border-radius: 10px;
  background: var(--accent-color);
  color: var(--background);
  font-weight: 600;
  text-decoration: none;
  box-shadow: 0 4px 10px rgba(0,0,0,0.2);
  transition: transform 0.18s ease, box-shadow 0.18s ease;
}

.modal-link:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 20px rgba(0,0,0,0.3);
}

.close-modal {
  position: absolute;
  top: 14px;
  right: 16px;
  background: transparent;
  border: none;
  color: var(--text-color);
  font-size: 24px;
  cursor: pointer;
  transition: transform 0.18s ease, color 0.18s;
}

.close-modal:hover {
  transform: scale(1.1);
  color: var(--accent-color);
}

@media screen and (max-width: 520px) {
  .container {
    padding: 1.5rem 1rem;
  }
  .header {
    flex-direction: column;
    gap: 1rem;
  }
  .title {
    font-size: 1.2rem;
  }
}

@media screen and (max-width: 320px) {
  .title {
    font-size: 1rem;
  }
}

.navbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  background-color: var(--dark-bg);
  padding: 0.5rem 1rem;
  border-bottom: 1px solid var(--dark-board-bg);
}

.navbar a {
  color: var(--dark-color);
  text-decoration: none;
  padding: 0.5rem 1rem;
  border-radius: 0.5rem;
  transition: background-color 0.3s;
}

.navbar a:hover {
  background-color: var(--dark-board-bg);
}

.nav-right {
  display: flex;
  gap: 1rem;
}