@import url('https://fonts.googleapis.com/css2?family=Montserrat:wght@500;700;900&display=swap');

:root {
  --color-primary: #4a90e2;
  --color-primary-h: 210;
  --color-primary-s: 60%;
  --color-primary-l: 55%;

  --color-text: #222222;
  --color-background: #f0f2f5;
  --color-secondary-background: #d5e4fc;
  --color-secondary: #65b36e;

  --btn-bg: var(--color-primary);
  --btn-text: var(--color-background);
  --btn-shadow: rgba(74, 144, 226, 0.3);
  --btn-hover-bg: #357abd;
  --btn-hover-shadow: rgba(53, 122, 189, 0.5);

  --box-shadow: 0 2px 2px hsla(var(--color-primary-h), 50%, 10%, .1), 0 4px 4px hsla(var(--color-primary-h), 50%, 10%, .05);

  --body-font: 'Montserrat', sans-serif;
}

/* Dark theme variables: default values to be overwritten by JS */
body.dark-theme {
  /* These will be dynamically overwritten */
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: var(--body-font);
  background: var(--color-secondary-background);
  color: var(--color-text);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 2rem 1rem;
  transition: background-color 0.4s ease, color 0.4s ease;
}

main {
  width: 100%;
  max-width: 900px;
  background: var(--color-background);
  border-radius: 12px;
  padding: 2rem;
  box-shadow: var(--box-shadow);
  transition: background-color 0.4s ease, color 0.4s ease, box-shadow 0.4s ease;
  color: var(--color-text);
}

.card-header {
  text-align: center;
  margin-bottom: 2rem;
}

h1 {
  margin: 0rem;
  font-weight: 900;
  color: var(--color-primary);
  transition: color 0.4s ease;
}

h2 {
  margin: 0rem;
  margin-top: 0.5rem;
  font-weight: 700;
  color: var(--color-text);
  transition: color 0.4s ease;
}

#controls {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 1rem;
  margin-bottom: 2rem;
  flex-wrap: wrap;
}

#controls label {
  font-weight: 600;
  font-size: 1.1rem;
  user-select: none;
  color: var(--color-text);
  transition: color 0.4s ease;
}

#baseColor {
  width: 80px;
  height: 40px;
  border: none;
  cursor: pointer;
  padding: 0;
  background: transparent;
}

#generateBtn,
#themeToggleBtn {
  font-family: inherit;
  padding: 0.6rem 1.4rem;
  background: var(--btn-bg);
  color: var(--btn-text);
  border: none;
  border-radius: 6px;
  font-weight: 500;
  font-size: 1rem;
  cursor: pointer;
  box-shadow: 0 6px 12px var(--btn-shadow);
  transition: background-color 0.22s ease-in-out, box-shadow 0.22s ease-in-out;
}

/* #generateBtn:focus, */
/* #themeToggleBtn:focus */
#generateBtn:hover,
#themeToggleBtn:hover {
  background: var(--btn-hover-bg);
  outline: none;
  box-shadow: 0 6px 16px var(--btn-hover-shadow);
}

#palette {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
  gap: 1.4rem;
}

.color-card {
  border-radius: 12px;
  overflow: hidden;
  background: #fafafa;
  box-shadow: var(--box-shadow);
  cursor: default;
  user-select: none;
  transition: transform 0.15s ease, background-color 0.4s ease, box-shadow 0.4s ease;
  position: relative;
}

.color-card:focus-within,
.color-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.15);
}

.color-swatch {
  width: 100%;
  height: 80px;
  border-radius: 12px 12px 0 0;
  box-shadow: inset 0 0 5px rgba(0, 0, 0, 0.15);
  transition: background-color 0.4s ease;
}

.color-info {
  padding: 0.8rem 1rem 1rem;
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
  font-family: monospace;
  font-size: 0.9rem;
  color: #444;
  position: relative;
  transition: color 0.4s ease;
}

.color-purpose {
  font-weight: 600;
  font-size: 0.85rem;
  color: #666;
  user-select: none;
  margin-bottom: 0.15rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  transition: color 0.4s ease;
}

.color-hex,
.color-rgba,
.color-hsl {
  background: #fff;
  padding: 0.3rem 0.5rem;
  border-radius: 5px;
  box-shadow: inset 0 0 5px rgba(0, 0, 0, 0.07);
  cursor: pointer;
  user-select: all;
  transition: background-color 0.15s ease, color 0.15s ease;
  color: inherit;
}

.color-hex:hover,
.color-rgba:hover,
.color-hsl:hover,
.color-hex:focus,
.color-rgba:focus,
.color-hsl:focus {
  background: var(--color-primary);
  color: white;
  outline: none;
}

.copy-tooltip {
  position: absolute;
  background: var(--color-primary);
  color: white;
  padding: 0.25rem 0.5rem;
  border-radius: 3px;
  font-size: 0.75rem;
  /* font-family: sans-serif; */
  white-space: nowrap;
  pointer-events: none;
  opacity: 0;
  transition: opacity 0.22s ease;
  transform-origin: bottom center;
  left: 50%;
  top: 0;
  transform: translate(-50%, -150%);
  z-index: 10;
  user-select: none;
}

.copy-tooltip.visible {
  opacity: 1;
}

/* Responsive */
@media (max-width: 420px) {
  #controls {
    flex-direction: column;
    gap: 1rem;
  }

  #generateBtn,
  #themeToggleBtn {
    width: 100%;
  }
}

.display-none {
  display: none;
}

/* New styles for CSS Variables display */
#cssVariablesSection {
  font-family: var(--body-font);
  color: var(--color-text);
}

.css-vars-block {
  background: var(--color-background);
  border-radius: 10px;
  border: 1px solid var(--color-secondary-background);
  padding: 1rem;
  box-shadow: var(--box-shadow);
  position: relative;
}

.code-block {
  background: #f5f5f5;
  border-radius: 6px;
  padding: 1rem;
  overflow-x: auto;
  max-height: 220px;
  font-size: 0.875rem;
  color: #333;
  user-select: text;
  margin-bottom: 0.6rem;
  white-space: pre-wrap;
  word-break: break-word;
}

body.dark-theme .css-vars-block,
body.dark-theme .code-block {
  background: var(--color-secondary-background);
  color: var(--color-text);
  border-color: var(--color-secondary);
  box-shadow: 0 2px 6px rgba(0,0,0,0.3);
}

.copy-css-btn {
  font-family: inherit;
  cursor: pointer;
  padding: 0.4rem 1rem;
  background: var(--btn-bg);
  color: var(--btn-text);
  border-radius: 6px;
  border: none;
  box-shadow: 0 4px 10px var(--btn-shadow);
  transition: background-color 0.22s ease-in-out, box-shadow 0.22s ease-in-out;
}

.copy-css-btn:hover,
.copy-css-btn:focus {
  background: var(--btn-hover-bg);
  outline: none;
  box-shadow: 0 5px 14px var(--btn-hover-shadow);
}