/* ========================================
   AlgoRhythmics — Black & White Theme
   ======================================== */

/* --- DARK MODE (default) --- */
[data-md-color-scheme="slate"] {
  --md-primary-fg-color: #000000;
  --md-primary-bg-color: #ffffff;
  --md-accent-fg-color: #ffffff;
  --md-default-fg-color: rgba(255, 255, 255, 0.92);
  --md-default-bg-color: #0a0a0a;
  --md-code-bg-color: #141414;
  --md-code-fg-color: #e0e0e0;
  --md-typeset-a-color: #ffffff;
  --md-footer-bg-color: #000000;
  --md-footer-fg-color: rgba(255, 255, 255, 0.7);
}

[data-md-color-scheme="slate"] .md-header {
  background-color: #000000;
  border-bottom: 1px solid rgba(255, 255, 255, 0.12);
}

[data-md-color-scheme="slate"] .md-tabs {
  background-color: #000000;
}

[data-md-color-scheme="slate"] .md-nav__link--active,
[data-md-color-scheme="slate"] .md-nav__link:hover {
  color: #ffffff;
}

[data-md-color-scheme="slate"] .md-nav__link {
  color: rgba(255, 255, 255, 0.55);
}

[data-md-color-scheme="slate"] .md-sidebar {
  border-right: 1px solid rgba(255, 255, 255, 0.08);
}

[data-md-color-scheme="slate"] .md-search__input {
  background-color: #141414;
}

/* --- LIGHT MODE --- */
[data-md-color-scheme="default"] {
  --md-primary-fg-color: #ffffff;
  --md-primary-bg-color: #000000;
  --md-accent-fg-color: #000000;
  --md-default-fg-color: rgba(0, 0, 0, 0.87);
  --md-default-bg-color: #ffffff;
  --md-code-bg-color: #f5f5f5;
  --md-code-fg-color: #1a1a1a;
  --md-typeset-a-color: #000000;
  --md-footer-bg-color: #000000;
  --md-footer-fg-color: rgba(255, 255, 255, 0.7);
}

[data-md-color-scheme="default"] .md-header {
  background-color: #ffffff;
  border-bottom: 1px solid rgba(0, 0, 0, 0.12);
  color: #000000;
}

[data-md-color-scheme="default"] .md-header .md-header__title {
  color: #000000;
}

[data-md-color-scheme="default"] .md-header .md-icon {
  color: #000000;
}

[data-md-color-scheme="default"] .md-tabs {
  background-color: #ffffff;
  border-bottom: 1px solid rgba(0, 0, 0, 0.08);
}

[data-md-color-scheme="default"] .md-nav__link--active,
[data-md-color-scheme="default"] .md-nav__link:hover {
  color: #000000;
}

[data-md-color-scheme="default"] .md-nav__link {
  color: rgba(0, 0, 0, 0.5);
}

[data-md-color-scheme="default"] .md-sidebar {
  border-right: 1px solid rgba(0, 0, 0, 0.08);
}

/* --- TYPOGRAPHY (Inter — geometric sans-serif) --- */
.md-typeset {
  font-size: 0.85rem;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

.md-typeset h1 {
  font-weight: 800;
  letter-spacing: -0.03em;
  font-size: 2.4em;
  border-bottom: 2px solid currentColor;
  padding-bottom: 0.3em;
  margin-bottom: 1em;
}

.md-typeset h2 {
  font-weight: 700;
  letter-spacing: -0.02em;
  font-size: 1.6em;
  margin-top: 2em;
}

.md-typeset h3 {
  font-weight: 600;
  font-size: 1.25em;
  letter-spacing: -0.01em;
}

/* Blockquotes — strong and distinct */
.md-typeset blockquote {
  border-left: 4px solid currentColor;
  padding: 0.8em 1.2em;
  font-style: italic;
  font-size: 1.05em;
  margin: 1.5em 0;
}

/* Horizontal rules — bold separators */
.md-typeset hr {
  border: none;
  border-top: 2px solid currentColor;
  margin: 2.5em 0;
  opacity: 0.3;
}

/* Code blocks */
.md-typeset code {
  border-radius: 2px;
  font-size: 0.85em;
}

.md-typeset pre {
  border-radius: 0;
  border: 1px solid rgba(128, 128, 128, 0.2);
}

/* --- LOGO --- */
.md-header__button.md-logo img {
  height: 2rem;
  width: auto;
  border-radius: 50%;
}

/* Navigation logo in sidebar */
.md-nav__button.md-logo img {
  border-radius: 50%;
}

/* --- STRONG EMPHASIS FOR INTERLUDES --- */
/* Stage directions in interludes */
.md-typeset em {
  opacity: 0.85;
}

/* --- FOOTER --- */
.md-footer {
  border-top: 1px solid rgba(128, 128, 128, 0.2);
}

/* --- GRID CARDS on homepage --- */
.md-typeset .grid.cards > ul > li {
  border: 1px solid rgba(128, 128, 128, 0.3);
  border-radius: 0;
}

.md-typeset .grid.cards > ul > li:hover {
  border-color: currentColor;
}

/* --- HOMEPAGE: three examples --- */
.algo-examples p {
  padding-left: 1.2em;
  border-left: 2px solid rgba(128, 128, 128, 0.25);
  margin: 1em 0;
  opacity: 0.85;
}

/* --- HOMEPAGE: subtitle line --- */
.algo-subtitle {
  text-align: center;
  opacity: 0.5;
  font-size: 0.9em;
  letter-spacing: 0.02em;
  margin-bottom: 2em;
}

/* --- HOMEPAGE: primary CTA --- */
.algo-primary-cta {
  text-align: center;
  margin: 2em auto 3em;
  max-width: 32em;
}

.algo-primary-cta .md-button {
  display: inline-block;
  font-size: 1em;
  padding: 0.6em 2em;
  border: 2px solid currentColor;
  border-radius: 0;
  background: transparent;
  color: inherit;
  text-decoration: none;
  font-weight: 600;
  letter-spacing: 0.01em;
  transition: opacity 0.2s;
}

.algo-primary-cta .md-button:hover {
  opacity: 0.7;
}

.algo-primary-cta p:last-child {
  margin-top: 1em;
  font-size: 0.85em;
  opacity: 0.6;
}

/* --- HOMEPAGE: closer --- */
.algo-closer {
  text-align: center;
  margin: 4em 0 2em;
  padding-top: 2em;
}

.algo-closer p {
  font-size: 1.1em;
  font-weight: 600;
  letter-spacing: -0.01em;
  opacity: 0.6;
}

/* --- CLEAN SCROLLBAR --- */
::-webkit-scrollbar {
  width: 6px;
}

::-webkit-scrollbar-thumb {
  background: rgba(128, 128, 128, 0.3);
  border-radius: 0;
}

/* --- FEEDBACK HEADER LINK --- */
.algo-header-msg {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: currentColor;
  opacity: 0.5;
  transition: opacity 0.2s;
  cursor: pointer;
}

.algo-header-msg:hover {
  opacity: 1;
}

/* --- FEEDBACK FORM --- */
.algo-feedback {
  margin-top: 3em;
  padding-top: 2em;
  border-top: 1px solid rgba(128, 128, 128, 0.2);
}

.algo-feedback summary {
  cursor: pointer;
  font-size: 0.85em;
  opacity: 0.5;
  transition: opacity 0.2s;
}

.algo-feedback summary:hover {
  opacity: 0.8;
}

.algo-feedback details[open] summary {
  opacity: 0.8;
  margin-bottom: 1em;
}

.algo-feedback form {
  display: flex;
  flex-direction: column;
  gap: 0.6em;
  max-width: 28em;
}

.algo-feedback input[type="text"],
.algo-feedback textarea {
  font-family: inherit;
  font-size: 0.85em;
  padding: 0.5em 0.7em;
  border: 1px solid rgba(128, 128, 128, 0.3);
  border-radius: 2px;
  background: transparent;
  color: inherit;
}

.algo-feedback input[type="text"]:focus,
.algo-feedback textarea:focus {
  outline: none;
  border-color: currentColor;
}

.algo-feedback textarea {
  resize: vertical;
  min-height: 4em;
}

.algo-feedback-actions {
  display: flex;
  align-items: center;
  gap: 1em;
}

.algo-feedback button {
  font-family: inherit;
  font-size: 0.8em;
  padding: 0.4em 1.4em;
  border: 1px solid currentColor;
  border-radius: 2px;
  background: transparent;
  color: inherit;
  cursor: pointer;
  transition: opacity 0.2s;
}

.algo-feedback button:hover {
  opacity: 0.7;
}

.algo-feedback button:disabled {
  opacity: 0.3;
  cursor: not-allowed;
}

.algo-msg-status {
  font-size: 0.8em;
  opacity: 0.7;
}

.algo-msg-ok {
  opacity: 1;
}

.algo-msg-err {
  opacity: 1;
  color: #c44;
}

/* --- PRINT --- */
@media print {
  .md-typeset {
    color: #000 !important;
  }
  .algo-feedback {
    display: none;
  }
}