:root {
  color-scheme: dark;
  /* Apple‑like system blue and neutrals */
  --primary-color: #0a84ff; /* macOS/iOS system blue */

  /* Background animated gradient (kept, but softened via glass card) */
  --gradient-color-1: #6452ee;
  --gradient-color-2: #b73ce7;
  --gradient-color-3: #1e91bb;
  --gradient-color-4: #32b395;

  /* Card surface defaults (light) */
  --background-color: rgba(255, 255, 255, 0.66);
  --text-color: #0b0b0c;
  --border-color: rgba(0, 0, 0, 0.08);
  --shadow-ambient: 0 8px 30px rgba(0, 0, 0, 0.06);

  /* Surface & component tokens */
  --radius-card: 24px;
  --blur-strength: 16px;
  --card-padding: 40px 32px 48px;

  /* Links */
  --link-color: #007aff;

  /* Toggle */
  --toggle-width: 58px;
  --toggle-height: 32px;
  --toggle-gap: 6px;
  --toggle-thumb-size: 26px;
  --toggle-sun-color: #f6c453;
  /* Dark blue-gray, similar to iOS moon */
  --toggle-moon-color: #2e3440;
}

/* Ensure built-in UI (forms, scrollbars) matches theme */
html:not(.dark) {
  color-scheme: light;
}

canvas.particles-js-canvas-el {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 1;
  pointer-events: none;
}

html {
  height: 100%;
}

body {
  min-height: 100%;
  margin: 0;
  background: linear-gradient(
    -45deg,
    var(--gradient-color-1),
    var(--gradient-color-2),
    var(--gradient-color-3),
    var(--gradient-color-4)
  );
  background-size: 300% 300%;
  animation: gradient 15s ease infinite;
  font-family:
    system-ui,
    -apple-system,
    BlinkMacSystemFont,
    "SF Pro Text",
    "SF Pro Display",
    "Segoe UI",
    Roboto,
    "Helvetica Neue",
    Arial,
    sans-serif;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 48px 16px;
  color: var(--text-color);
}

h1 {
  color: var(--text-color);
  margin: 0.6em 0 0.4em;
  line-height: 1.18;
  font-weight: 700;
  font-size: clamp(28px, 4vw, 36px);
  letter-spacing: -0.01em;
  transition: color 0.35s ease;
}

/* Links */
.card-main a,
.card-spotify a {
  color: var(--link-color);
  text-decoration: none;
  transform: translateZ(0);
  will-change: opacity;
  transition: opacity 0.2s ease;
}
.card-main a:hover,
.card-spotify a:hover {
  opacity: 0.6;
}

.card-main a img {
  transition:
    transform 0.25s ease,
    opacity 0.25s ease;
}
.card-main a img:hover {
  transform: scale(1.08);
  opacity: 0.95;
}

@keyframes gradient {
  0%,
  100% {
    background-position: 0% 50%;
  }
  50% {
    background-position: 100% 50%;
  }
}

/*
 * Theme toggle (top-right of the card)
 */
.theme-toggle {
  position: absolute;
  top: 12px;
  right: 12px;
  width: var(--toggle-width);
  height: var(--toggle-height);
  border: 0;
  border-radius: 999px;
  padding: 0 8px;
  display: inline-flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--toggle-gap);
  cursor: pointer;
  background: rgba(0, 0, 0, 0.06);
  box-shadow:
    0 0 0 1px rgba(0, 0, 0, 0.06) inset,
    0 2px 10px rgba(0, 0, 0, 0.12);
  transition:
    background-color 0.35s ease,
    box-shadow 0.35s ease;
  z-index: 3;
}

.theme-toggle:focus-visible {
  outline: 2px solid var(--primary-color);
  outline-offset: 2px;
}

.theme-toggle .icon {
  pointer-events: none;
  font-size: 16px;
  line-height: 1;
  transition: opacity 0.35s ease;
}

.theme-toggle .sun {
  color: var(--toggle-sun-color);
  opacity: 0.35;
}
.theme-toggle .moon {
  color: var(--toggle-moon-color);
  opacity: 1;
}

.theme-toggle .thumb {
  position: absolute;
  top: 3px;
  left: 3px;
  width: var(--toggle-thumb-size);
  height: var(--toggle-thumb-size);
  border-radius: 50%;
  background: #ffffff;
  box-shadow:
    0 2px 8px rgba(0, 0, 0, 0.25),
    0 0 0 1px rgba(0, 0, 0, 0.05) inset;
  transition:
    transform 0.35s cubic-bezier(0.4, 0, 0.2, 1),
    background-color 0.35s ease;
}

html.dark .theme-toggle {
  background: rgba(255, 255, 255, 0.08);
  box-shadow:
    0 2px 10px rgba(0, 0, 0, 0.35),
    0 0 0 1px rgba(255, 255, 255, 0.06) inset;
}

html.dark .theme-toggle .thumb {
  transform: translateX(26px);
  background: #0b0b0b;
}

html.dark .theme-toggle .sun {
  opacity: 1;
}
html.dark .theme-toggle .moon {
  opacity: 0.35;
}

/*
 * Custom RGB glowing cursor
 * Only show on devices with a mouse/pointer (not touch devices)
 */
#custom-cursor {
  display: none;
}

@media (pointer: fine) {
  body {
    cursor: none !important;
  }

  body * {
    cursor: none !important;
  }

  #custom-cursor {
    display: block;
    position: fixed;
    top: 0;
    left: 0;
    width: 20px;
    height: 20px;
    border-radius: 50%;
    pointer-events: none;
    z-index: 9999;
    transform: translate(-50%, -50%);
    transition:
      width 0.2s ease,
      height 0.2s ease,
      opacity 0.2s ease;
    will-change: transform;
    animation: rainbow 3s linear infinite;
  }

  #custom-cursor::before {
    content: "";
    position: absolute;
    top: 50%;
    left: 50%;
    width: 100%;
    height: 100%;
    border-radius: 50%;
    transform: translate(-50%, -50%);
    background: radial-gradient(
      circle,
      hsla(280, 100%, 65%, 0.9) 0%,
      hsla(280, 100%, 60%, 0.5) 40%,
      transparent 70%
    );
    animation: pulse 2s ease-in-out infinite;
  }

  #custom-cursor::after {
    content: "";
    position: absolute;
    top: 50%;
    left: 50%;
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.95);
    transform: translate(-50%, -50%);
    box-shadow: 0 0 12px hsla(280, 100%, 60%, 0.8);
  }

  body.cursor-hover #custom-cursor {
    width: 40px;
    height: 40px;
  }

  @keyframes pulse {
    0%,
    100% {
      transform: translate(-50%, -50%) scale(1);
      opacity: 1;
    }
    50% {
      transform: translate(-50%, -50%) scale(1.5);
      opacity: 0.6;
    }
  }

  @keyframes rainbow {
    0% {
      filter: hue-rotate(0deg) brightness(1.2);
    }
    100% {
      filter: hue-rotate(360deg) brightness(1.2);
    }
  }
}

/*
 * GitHub contribution calendar
 */
#github-calendar {
  margin-top: 1rem;
}

#github-calendar svg {
  display: block;
  max-width: 100%;
  height: auto;
  margin: 0 auto;
}

/*
 * Cards wrapper
 */
#cards-wrapper {
  display: flex;
  align-items: stretch;
  justify-content: center;
  gap: 24px;
  z-index: 2;
  position: relative;
  width: 100%;
}

/*
 * Shared card styles
 */
.card-main,
.card-spotify {
  background-color: var(--background-color);
  color: var(--text-color);
  border-radius: var(--radius-card);
  padding: var(--card-padding);
  border: 1px solid var(--border-color);
  box-shadow: var(--shadow-ambient);
  position: relative;
  backdrop-filter: saturate(180%) blur(var(--blur-strength));
  -webkit-backdrop-filter: saturate(180%) blur(var(--blur-strength));
  transition:
    background-color 0.35s ease,
    box-shadow 0.35s ease,
    border-color 0.35s ease;
}

.card-main {
  width: 760px;
  max-width: 100%;
}

.card-spotify {
  width: 280px;
  display: flex;
  flex-direction: column;
}

.card-spotify[hidden] {
  display: none;
}

html.dark .card-main,
html.dark .card-spotify {
  --background-color: rgba(22, 22, 24, 0.66);
  --text-color: #e6e6e7;
  --border-color: rgba(255, 255, 255, 0.08);
  --link-color: #61adff;
  box-shadow: 0 12px 36px rgba(0, 0, 0, 0.35);
}

/*
 * Spotify card specific styles
 */
.spotify-header {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  margin-bottom: 20px;
  font-size: 13px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  opacity: 0.6;
}

.spotify-header .fa-spotify {
  font-size: 18px;
  color: #1db954;
}

.spotify-content {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 16px;
}

.spotify-album-art {
  width: 160px;
  height: 160px;
  border-radius: 12px;
  object-fit: cover;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.3);
}

.spotify-info {
  text-align: center;
  width: 100%;
  overflow: hidden;
}

.spotify-title,
.spotify-artist {
  display: block;
  white-space: nowrap;
}

.spotify-title {
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 4px;
}

.spotify-artist {
  font-size: 14px;
  opacity: 0.7;
  margin: 0;
}

.spotify-title.is-disabled {
  pointer-events: none;
  text-decoration: none;
  opacity: 0.7;
}

/* Marquee animation for overflowing text */
.spotify-title.marquee,
.spotify-artist.marquee {
  text-align: left;
  animation-name: marquee;
  animation-duration: var(--marquee-duration);
  animation-timing-function: ease-in-out;
  animation-iteration-count: infinite;
}

@keyframes marquee {
  0%,
  10% {
    transform: translateX(0);
  }
  45%,
  55% {
    transform: translateX(var(--marquee-offset));
  }
  90%,
  100% {
    transform: translateX(0);
  }
}

.spotify-progress-container {
  width: 100%;
  height: 4px;
  background: rgba(255, 255, 255, 0.1);
  border-radius: 2px;
  margin-top: 24px;
  overflow: hidden;
}

html:not(.dark) .spotify-progress-container {
  background: rgba(0, 0, 0, 0.1);
}

.spotify-progress {
  height: 100%;
  background: #1db954;
  width: 0%;
  transition: width 1s linear;
  will-change: width;
}

/* Responsive: stack cards on tablet/mobile */
@media (max-width: 1100px) {
  #cards-wrapper {
    flex-direction: column;
    align-items: center;
  }

  .card-main,
  .card-spotify {
    width: 100%;
    max-width: 760px;
  }
}

/* Responsive: smaller screens */
@media (max-width: 600px) {
  body {
    padding: 24px 12px;
  }

  .card-main,
  .card-spotify {
    padding: 32px 20px 36px;
  }

  .spotify-album-art {
    width: 120px;
    height: 120px;
  }
}