/* Base */
* {
  box-sizing: border-box;
}

body {
  font-family:
    ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, "Liberation Mono",
    monospace;
  background: var(--bg);
  margin: 0;
  padding: 1rem 2rem;
  line-height: 1.6;
  min-height: 100vh;
}

/* Theme variables */
:root {
  --bg: #000;
  --fg: #fff;
  --fg-dim: rgba(255, 255, 255, 0.5);
  --border: rgba(255, 255, 255, 0.3);
  --border-hover: rgba(255, 255, 255, 0.5);
}

.theme-white {
  --bg: #000;
  --fg: #fff;
  --fg-dim: rgba(255, 255, 255, 0.5);
  --border: rgba(255, 255, 255, 0.3);
  --border-hover: rgba(255, 255, 255, 0.5);
}

.theme-green {
  --bg: #0c0c0c;
  --fg: #00ff00;
  --fg-dim: rgba(0, 255, 0, 0.5);
  --border: rgba(0, 255, 0, 0.3);
  --border-hover: rgba(0, 255, 0, 0.5);
}

.theme-amber {
  --bg: #1a1200;
  --fg: #ffb000;
  --fg-dim: rgba(255, 176, 0, 0.5);
  --border: rgba(255, 176, 0, 0.3);
  --border-hover: rgba(255, 176, 0, 0.5);
}

.theme-blue {
  --bg: #0a1628;
  --fg: #4af;
  --fg-dim: rgba(68, 170, 255, 0.5);
  --border: rgba(68, 170, 255, 0.3);
  --border-hover: rgba(68, 170, 255, 0.5);
}

.theme-red {
  --bg: #0c0c0c;
  --fg: #ff3b3b;
  --fg-dim: rgba(255, 59, 59, 0.5);
  --border: rgba(255, 59, 59, 0.3);
  --border-hover: rgba(255, 59, 59, 0.5);
}

/* Header */
h1 {
  text-align: center;
  color: var(--fg);
  margin-bottom: 0rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.tagline {
  text-align: center;
  color: var(--fg-dim);
  margin-top: 0rem;
  margin-bottom: 3rem;
  font-size: 0.9rem;
}

/* Controls */
.controls {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 1.5rem;
}

.control-btn {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  border: 1px solid var(--border);
  background: transparent;
  color: var(--fg);
  cursor: pointer;
  transition: all 0.2s;
  font-size: 0.9rem;
  display: flex;
  align-items: center;
  justify-content: center;
  line-height: 1;
  padding: 0;
}

.control-btn:hover {
  border-color: var(--border-hover);
  background: var(--border);
}

.theme-btn:hover {
  border-color: transparent;
}

.control-btn:disabled {
  opacity: 0.3;
  cursor: not-allowed;
}

.control-btn:disabled:hover {
  background: transparent;
  border-color: var(--border);
}

.control-divider {
  width: 1px;
  height: 20px;
  background: var(--border);
  margin: 0 0.5rem;
}

.theme-btn {
  border: 2px solid transparent;
}

.theme-btn.white {
  background: #fff;
}
.theme-btn.blue {
  background: #4af;
}
.theme-btn.red {
  background: #ff3b3b;
}
.theme-btn.green {
  background: #00ff00;
}
.theme-btn.amber {
  background: #ffb000;
}

.theme-btn.active {
  border-color: var(--fg);
}

/* Quotes grid */
.quotes-container {
  max-width: 1200px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
  gap: 1.5rem;
  justify-items: center;
}

.quote-wrapper {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1rem;
}

/* Card flip */
.card-container {
  width: 340px;
  height: 340px;
  perspective: 1000px;
}

.card-inner {
  position: relative;
  width: 100%;
  height: 100%;
  transition: transform 0.6s;
  transform-style: preserve-3d;
  -webkit-transform-style: preserve-3d;
}

.card-container.flipped .card-inner {
  transform: rotateY(180deg);
}

.card-front,
.card-back {
  position: absolute;
  width: 100%;
  height: 100%;
  -webkit-backface-visibility: hidden;
  backface-visibility: hidden;
  -webkit-transform: translateZ(0);
  transform: translateZ(0);
  padding: 2rem;
  display: flex;
  flex-direction: column;
  justify-content: center;
  overflow: hidden;
}

.card-front {
  background: var(--bg);
  border: 1px solid var(--border);
}

.card-back {
  -webkit-transform: rotateY(180deg) translateZ(0);
  transform: rotateY(180deg) translateZ(0);
  background: var(--fg);
  border: 1px solid var(--border);
}

.card-back .quote-text {
  color: var(--bg);
  font-style: italic;
}

.card-back .attribution {
  color: var(--bg);
  opacity: 0.7;
}

.card-back .comment-syntax {
  color: var(--bg);
  opacity: 0.3;
}

/* Quote content */
.quote-text {
  margin: 0;
  font-size: 1.1rem;
  color: var(--fg);
  position: relative;
  z-index: 1;
}

.attribution {
  margin-top: 1.5rem;
  font-size: 0.75rem;
  color: var(--fg-dim);
  font-style: normal;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  position: relative;
  z-index: 1;
}

.attribution s {
  opacity: 0.5;
}

.comment-syntax {
  position: absolute;
  font-size: 1.5rem;
  color: var(--border);
  z-index: 1;
}

.comment-syntax.open {
  top: 1rem;
  left: 1.5rem;
}

.comment-syntax.close {
  bottom: 1rem;
  right: 1.5rem;
}

/* Buttons */
.button-group {
  display: flex;
  gap: 0.5rem;
  width: 340px;
}

.btn {
  flex: 1;
  background: transparent;
  color: var(--fg-dim);
  border: 1px solid var(--border);
  padding: 0.6rem 0;
  font-size: 0.75rem;
  cursor: pointer;
  font-family: inherit;
  transition: all 0.2s;
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

.btn:hover {
  color: var(--fg);
  border-color: var(--border-hover);
}

/* Footer */
footer {
  text-align: center;
  margin-top: 3rem;
  font-size: 0.75rem;
  color: var(--fg-dim);
}

footer a {
  color: var(--fg-dim);
  text-decoration: none;
}

footer a:hover {
  color: var(--fg);
}

/* Mobile */
@media (max-width: 480px) {
  .control-btn {
    width: 28px;
    height: 28px;
  }

  .control-btn svg {
    width: 12px;
    height: 12px;
  }

  .control-divider {
    margin: 0 0.25rem;
  }

  .copy-btn {
    display: none;
  }
}