@font-face {
  font-family: "Circular";
  src: url("https://encore.scdn.co/fonts/SpotifyMixUI-Regular-cc3b1de388efa4cbca6c75cebc24585e.woff2") format("woff2");
  font-weight: 400;
  font-style: normal;
  font-display: swap;
}

@font-face {
  font-family: "Circular";
  src: url("https://encore.scdn.co/fonts/SpotifyMixUI-Bold-4264b799009b1db5c491778b1bc8e5b7.woff2") format("woff2");
  font-weight: 700;
  font-style: normal;
  font-display: swap;
}

@font-face {
  font-family: "Circular";
  src: url("https://encore.scdn.co/fonts/SpotifyMixUITitleVariable-8769ccfde3379b7ebcadd9529b49d0cc.woff2")
    format("woff2");
  font-weight: 100 900;
  font-style: normal;
  font-display: swap;
}

:root {
  --font-family-base: "Circular", "Helvetica Neue", Arial, sans-serif;

  --color-black: #000;
  --color-white: #fff;
  --color-bg-page: #000;
  --color-surface-1: #121212;
  --color-surface-2: #181818;
  --color-surface-3: #242424;
  --color-text-muted: #b3b3b3;
  --color-text-dark: #b3b3b3;
  --color-card-default: #d84c3d;
  --color-checker: #303030;

  --color-accent: #1db954;
  --color-accent-strong: #1ed760;

  --color-white-90: rgba(255, 255, 255, 0.92);
  --color-white-50: rgba(255, 255, 255, 0.55);
  --color-white-30: rgba(255, 255, 255, 0.3);
  --color-white-20: rgba(255, 255, 255, 0.18);
  --color-white-10: rgba(255, 255, 255, 0.1);
  --color-white-05: rgba(255, 255, 255, 0.07);

  --color-accent-20: rgba(29, 185, 84, 0.24);
  --color-accent-10: rgba(29, 185, 84, 0.14);
  --shadow-card: 0 12px 28px rgba(0, 0, 0, 0.35);
  --shadow-accent: 0 6px 20px rgba(0, 0, 0, 0.35);

  --radius-ui: 12px;
  --transition-fast: 0.16s ease;
  --transition-normal: 0.2s ease;

  --card-radius: 16px;
  --lyrics-max-height: 342px;
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

::selection {
  background: var(--color-accent);
  color: var(--color-black);
}

body {
  font-family: var(--font-family-base);
  background: var(--color-bg-page);
  min-height: 100vh;
  color: var(--color-white);
  overflow-x: hidden;
  font-size: 14px;
  display: flex;
  flex-direction: column;
}

.container {
  display: flex;
  flex: 1;
  min-height: 0;
  gap: 8px;
  padding: 8px;
  max-width: 100vw;
  margin: 0 auto;
  width: 100%;
  align-items: stretch;
}

.sidebar {
  flex: 1;
  max-width: 460px;
  background: var(--color-surface-1);
  border: 1px solid var(--color-white-10);
  border-radius: var(--radius-ui);
  padding: 24px 28px;
  margin: 0;
}

.main-content {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 0;
  background: var(--color-surface-1);
  border: 1px solid var(--color-white-10);
  border-radius: var(--radius-ui);
  padding: 24px;
}

.header-title {
  font-size: 2.5em;
  font-weight: 800;
  margin-bottom: 8px;
  color: var(--color-white);
}

.header-subtitle {
  font-size: 1em;
  color: var(--color-text-muted);
  margin-bottom: 24px;
}

.form-group {
  margin-bottom: 20px;
  transition:
    opacity var(--transition-normal),
    filter var(--transition-normal);
}

/* Estado desabilitado para form-group (background color) */
.disabled-form-group {
  opacity: 0.45;
  pointer-events: none;
  filter: grayscale(0.5);
  transition:
    opacity var(--transition-normal),
    filter var(--transition-normal);
  cursor: not-allowed;
}

.form-label {
  display: block;
  font-size: 0.9em;
  font-weight: 600;
  color: var(--color-text-muted);
  margin-bottom: 8px;
  text-transform: uppercase;
  letter-spacing: 0.4px;
}

.form-input {
  width: 100%;
  padding: 12px;
  border: 1px solid var(--color-white-20);
  border-radius: var(--radius-ui);
  background: var(--color-surface-2);
  color: var(--color-white);
  font-size: 1em;
  transition:
    border-color var(--transition-fast),
    box-shadow var(--transition-fast),
    background var(--transition-fast);
  font-family: inherit;
}

.form-input:focus {
  outline: none;
  border-color: var(--color-accent);
  background: var(--color-surface-3);
  box-shadow: 0 0 0 3px var(--color-accent-20);
}

.form-input::placeholder {
  color: var(--color-white-50);
}

/* Restrict textarea resize to vertical only */
textarea.form-input {
  resize: vertical;
  min-height: 100px;
}

.file-input-wrapper {
  position: relative;
  display: inline-block;
  width: 100%;
}

.file-input {
  position: absolute;
  opacity: 0;
  width: 100%;
  height: 100%;
  cursor: pointer;
}

label,
.file-input-label {
  user-select: none;
}

.file-input-label {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  padding: 16px;
  border: 1px dashed var(--color-white-30);
  border-radius: var(--radius-ui);
  background: var(--color-surface-2);
  color: var(--color-text-dark);
  cursor: pointer;
  transition:
    border-color var(--transition-fast),
    background var(--transition-fast),
    color var(--transition-fast);
  font-weight: 500;
}

.file-input-label:hover {
  border-color: var(--color-white-50);
  background: var(--color-surface-3);
  color: var(--color-white);
}

.checkbox-group {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 16px;
}

.checkbox {
  width: 20px;
  height: 20px;
  accent-color: var(--color-accent);
  margin: 0;
}

input[type="checkbox"].checkbox {
  cursor: pointer;
}

.checkbox-label {
  font-size: 1em;
  color: var(--color-text-muted);
  cursor: pointer;
  user-select: none;
  margin: 0;
}

.color-input {
  width: 100%;
  height: 60px;
  border: 1px solid var(--color-white-20);
  border-radius: var(--radius-ui);
  background: var(--color-surface-2);
  cursor: pointer;
  transition:
    border-color var(--transition-fast),
    box-shadow var(--transition-fast);
}

.color-input:hover {
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px var(--color-accent-20);
}

.buttons-container {
  display: flex;
  gap: 8px;
  margin-top: 24px;
}

.btn {
  flex: 1;
  padding: 12px 20px;
  border: none;
  border-radius: var(--radius-ui);
  font-weight: 700;
  font-size: 0.92em;
  cursor: pointer;
  transition:
    background var(--transition-fast),
    color var(--transition-fast),
    box-shadow var(--transition-fast),
    transform var(--transition-fast),
    border-color var(--transition-fast);
  text-transform: none;
  letter-spacing: 0;
  font-family: inherit;
}

.btn-primary {
  background: var(--color-accent);
  color: var(--color-black);
}

.btn-primary:hover {
  background: var(--color-accent-strong);
  transform: translateY(-1px);
  box-shadow: var(--shadow-accent);
}

.btn-secondary {
  background: var(--color-surface-2);
  color: var(--color-white);
  border: 1px solid var(--color-white-20);
}

.btn-secondary:hover {
  background: var(--color-surface-3);
  border-color: var(--color-white-30);
  transform: translateY(-1px);
}

.card {
  width: 532px;
  height: 532px;
  background-color: var(--color-card-default);
  border-radius: var(--card-radius);
  padding: 24px;
  color: var(--color-black);
  display: flex;
  flex-direction: column;
  justify-content: flex-start;
  gap: 26px;
  box-sizing: border-box;
  position: relative;
  user-select: none;
  box-shadow: var(--shadow-card);
  transition: transform var(--transition-fast);
  font-size: 1rem;
  overflow: hidden;
}

.card:hover {
  transform: translateY(-2px);
}

.card img {
  width: 50px;
  height: 50px;
  object-fit: cover;
  border-radius: var(--radius-ui);
  image-rendering: auto;
}

/* Default cover placeholder */
.card img:not([src]),
.card img[src=""] {
  background-color: var(--color-text-dark);
  background-image:
    linear-gradient(45deg, var(--color-checker) 25%, transparent 25%),
    linear-gradient(-45deg, var(--color-checker) 25%, transparent 25%),
    linear-gradient(45deg, transparent 75%, var(--color-checker) 75%),
    linear-gradient(-45deg, transparent 75%, var(--color-checker) 75%);
  background-size: 8px 8px;
  background-position:
    0 0,
    0 4px,
    4px -4px,
    -4px 0px;
}

.header {
  display: flex;
  align-items: center;
  gap: 14px;
}

.header div {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.title {
  font-weight: bold;
}

.title,
.artist {
  font-size: 1.1em;
}

.lyrics {
  font-size: 3.2em;
  white-space: pre-wrap;
  font-weight: bold;
  letter-spacing: 0em;
  margin-bottom: 2.5rem;
  line-height: 1.1;
  flex-grow: 1;
  display: flex;
  align-items: flex-start;
  max-height: var(--lyrics-max-height);
  overflow: hidden;
}

.spotify-logo {
  position: absolute;
  bottom: 24px;
  left: 24px;
  width: auto;
  height: 26px;
  opacity: 1;
}

footer {
  text-align: center;
  padding: 16px 0;
  color: var(--color-text-muted);
  font-size: 1em;
  user-select: none;
}

footer a {
  color: var(--color-accent);
  text-decoration: none;
  transition: filter var(--transition-fast);
}

footer a:hover {
  text-decoration: none;
  filter: brightness(120%);
}

@media (max-width: 1024px) {
  .container {
    flex-direction: column;
    gap: 8px;
    padding: 8px;
  }

  .sidebar {
    max-width: 100%;
    width: 100%;
    order: 1;
    height: auto;
  }

  .main-content {
    order: 2;
    min-height: auto;
    height: auto;
  }

  .card {
    width: 100%;
    max-width: 532px;
  }

  #color-labels {
    display: flex;
    gap: 20px;
    flex-wrap: wrap;
    flex-direction: row;
  }

  .form-group#bg-color {
    flex: 1;
  }
}

@media (max-width: 768px) {
  .container {
    padding: 8px;
    gap: 8px;
  }

  .sidebar {
    padding: 20px;
  }

  .header-title {
    font-size: 2em;
  }

  .card {
    width: 100%;
    height: auto;
    aspect-ratio: 1 / 1;
  }

  .buttons-container {
    flex-direction: column;
  }

  .btn {
    flex: none;
  }
}

@media (max-width: 480px) {
  .container {
    padding: 6px;
  }

  .sidebar {
    padding: 16px;
  }

  .header-title {
    font-size: 1.75em;
  }

  .form-input {
    padding: 14px;
  }

  .btn {
    padding: 14px 20px;
  }
}

/* Dark scrollbar */
::-webkit-scrollbar {
  width: 8px;
}

::-webkit-scrollbar-track {
  background: var(--color-surface-2);
}

::-webkit-scrollbar-thumb {
  background: var(--color-white-20);
  border-radius: var(--radius-ui);
}

::-webkit-scrollbar-thumb:hover {
  background: var(--color-white-30);
}