/* ==========================================================================
   Color Palette & Variables
   ========================================================================== */
:root {
  --color-text: #2d2d2d;
  --color-text-muted: #666;
  --color-bg: #fafafa;
  --color-bg-subtle: #f5f5f5;
  --color-bg-input: #fff;
  --color-border: #ddd;
  --color-border-light: #e8e8e8;
  --color-accent: #6b8e6b;
  --color-accent-hover: #5a7d5a;
  --color-accent-light: rgba(107, 142, 107, 0.1);
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.08);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.1);
  --transition-fast: 0.15s ease;
  --transition-normal: 0.25s ease;
}

/* Dark mode colors */
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --color-text: #e0e0e0;
    --color-text-muted: #a0a0a0;
    --color-bg: #1a1a1a;
    --color-bg-subtle: #252525;
    --color-bg-input: #2a2a2a;
    --color-border: #404040;
    --color-border-light: #353535;
    --color-accent: #8fb88f;
    --color-accent-hover: #a0c9a0;
    --color-accent-light: rgba(143, 184, 143, 0.15);
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.4);
  }
}

/* Manual dark mode override */
:root[data-theme="dark"] {
  --color-text: #e0e0e0;
  --color-text-muted: #a0a0a0;
  --color-bg: #1a1a1a;
  --color-bg-subtle: #252525;
  --color-bg-input: #2a2a2a;
  --color-border: #404040;
  --color-border-light: #353535;
  --color-accent: #8fb88f;
  --color-accent-hover: #a0c9a0;
  --color-accent-light: rgba(143, 184, 143, 0.15);
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.4);
}

/* ==========================================================================
   Base Styles
   ========================================================================== */
body {
  background-color: var(--color-bg);
  color: var(--color-text);
  font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
  line-height: 1.6;
  margin: 1.5rem auto;
  max-width: 1214px;
  padding: 0 1.5rem;
}

/* ==========================================================================
   Page Header
   ========================================================================== */
.page-header {
  margin-bottom: 1.5rem;
}

.page-header h1 {
  color: var(--color-accent);
  font-size: 2rem;
  font-weight: 700;
  margin: 0 0 0.5rem 0;
}

.page-header nav {
  display: flex;
  gap: 1.5rem;
}

.page-header nav a {
  color: var(--color-text-muted);
  font-size: 0.9rem;
}

.page-header nav a:hover {
  color: var(--color-accent);
}

/* ==========================================================================
   Typography
   ========================================================================== */
h4 {
  border-bottom: 2px solid var(--color-accent);
  color: var(--color-text);
  letter-spacing: 0.02em;
  margin-bottom: 1rem;
  padding-bottom: 0.5rem;
}

a {
  color: var(--color-text-muted);
  text-decoration: none;
  transition: color var(--transition-fast);
}

a:hover {
  color: var(--color-accent);
}

p strong a {
  color: var(--color-accent);
  font-weight: 600;
}

p strong a:hover {
  color: var(--color-accent-hover);
  text-decoration: underline;
}

code {
  background-color: var(--color-bg-subtle);
  border: 1px solid var(--color-border-light);
  border-radius: 4px;
  font-size: 0.9em;
  padding: 0.15rem 0.35rem;
}

/* ==========================================================================
   Form Elements
   ========================================================================== */
textarea {
  background-color: var(--color-bg-input);
  border: 1px solid var(--color-border);
  color: var(--color-text);
  border-radius: 0.5rem;
  box-shadow: var(--shadow-sm);
  font-family: inherit;
  font-size: 0.95rem;
  line-height: 1.5;
  padding: 0.75rem;
  transition:
    border-color var(--transition-fast),
    box-shadow var(--transition-fast);
  width: 100%;
  box-sizing: border-box;
  resize: vertical;
}

textarea:focus {
  border-color: var(--color-accent);
  box-shadow:
    0 0 0 3px var(--color-accent-light),
    var(--shadow-sm);
  outline: none;
}

/* Custom Checkbox Styling */
label {
  align-items: center;
  cursor: pointer;
  display: flex;
  gap: 0.5rem;
  transition: color var(--transition-fast);
}

label:hover {
  color: var(--color-accent);
}

input[type="checkbox"] {
  accent-color: var(--color-accent);
  cursor: pointer;
  height: 1rem;
  width: 1rem;
}

/* Checkbox container */
.checkbox-row {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  margin: 0;
}

/* ==========================================================================
   Results Section
   ========================================================================== */
pre {
  background: linear-gradient(135deg, var(--color-bg-input) 0%, var(--color-bg-subtle) 100%);
  border: 1px solid var(--color-border);
  border-radius: 0.5rem;
  box-shadow: var(--shadow-md);
  overflow-x: auto;
  padding: 1rem 1.25rem;
}

/* Override highlight.js background */
pre.hljs {
  background: linear-gradient(135deg, var(--color-bg-input) 0%, var(--color-bg-subtle) 100%);
}

/* Dark mode highlight.js overrides */
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) pre.hljs {
    color: #e0e0e0;
  }
  :root:not([data-theme="light"]) .hljs-attr {
    color: #9cdcfe;
  }
  :root:not([data-theme="light"]) .hljs-string {
    color: #ce9178;
  }
  :root:not([data-theme="light"]) .hljs-number {
    color: #b5cea8;
  }
  :root:not([data-theme="light"]) .hljs-literal {
    color: #569cd6;
  }
}

:root[data-theme="dark"] pre.hljs {
  color: #e0e0e0;
}
:root[data-theme="dark"] .hljs-attr {
  color: #9cdcfe;
}
:root[data-theme="dark"] .hljs-string {
  color: #ce9178;
}
:root[data-theme="dark"] .hljs-number {
  color: #b5cea8;
}
:root[data-theme="dark"] .hljs-literal {
  color: #569cd6;
}

/* ==========================================================================
   Layout
   ========================================================================== */
.flex {
  display: flex;
  flex-direction: column;
  gap: 0;
}

.flex > * {
  flex-grow: 1;
}

@media (min-width: 64em) {
  .flex {
    flex-direction: row-reverse;
    gap: 2rem;
  }
}

/* ==========================================================================
   Footer
   ========================================================================== */
footer {
  border-top: 1px solid var(--color-border-light);
  color: var(--color-text-muted);
  font-size: 0.875rem;
  margin-top: 2rem;
  padding-top: 1rem;
  text-align: center;
}

footer a {
  color: var(--color-accent);
}

footer a:hover {
  color: var(--color-accent-hover);
  text-decoration: underline;
}

/* ==========================================================================
   Theme Toggle
   ========================================================================== */
.theme-toggle {
  background: var(--color-bg-subtle);
  border: 1px solid var(--color-border);
  border-radius: 4px;
  color: var(--color-text-muted);
  cursor: pointer;
  font-size: 1.25rem;
  line-height: 1;
  padding: 0.25rem 0.5rem;
  position: fixed;
  right: 0.75rem;
  top: 0.75rem;
  transition:
    background-color var(--transition-fast),
    border-color var(--transition-fast),
    color var(--transition-fast);
  z-index: 10000;
}

.theme-toggle:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
}

@media screen and (min-width: 800px) {
  .theme-toggle {
    right: 210px;
  }
}

/* ==========================================================================
   GitHub Ribbon
   ========================================================================== */
#forkongithub a {
  background: #4a6b4a;
  color: #fff;
  font-family: arial, sans-serif;
  font-size: 1rem;
  font-weight: bold;
  line-height: 2rem;
  padding: 5px 40px;
  position: relative;
  text-align: center;
  text-decoration: none;
  transition: background-color var(--transition-normal);
}

#forkongithub a:hover {
  background: #b85c38;
  color: #fff;
}

#forkongithub a::before,
#forkongithub a::after {
  background: rgba(255, 255, 255, 0.3);
  content: "";
  display: block;
  height: 1px;
  left: 0;
  position: absolute;
  top: 1px;
  width: 100%;
}

#forkongithub a::after {
  bottom: 1px;
  top: auto;
}

@media screen and (min-width: 800px) {
  #forkongithub {
    display: block;
    height: 200px;
    overflow: hidden;
    position: fixed;
    right: 0;
    top: 0;
    width: 200px;
    z-index: 9999;
  }

  #forkongithub a {
    box-shadow: 4px 4px 10px rgba(0, 0, 0, 0.3);
    position: absolute;
    right: -60px;
    top: 60px;
    transform: rotate(45deg);
    width: 200px;
  }
}