/* ============================================================
   AI for EDA Hub — editorial × industrial theme
   ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=Fraunces:opsz,wght@9..144,500;9..144,600;9..144,700&family=IBM+Plex+Sans:wght@300;400;500;600&family=JetBrains+Mono:wght@400;500&display=swap');

/* ----------------------------------------------------------------
   1. Color tokens (light / dark)
   ---------------------------------------------------------------- */

[data-md-color-scheme="default"] {
  --tl-paper:      #F5F2EC;
  --tl-ink:        #0F1B22;
  --tl-teal-deep:  #14606B;
  --tl-teal-soft:  #7CB7B5;
  --tl-navy:       #1F4D7A;
  --tl-rule:       rgba(15, 27, 34, 0.12);
  --tl-hero-from:  #14606B;
  --tl-hero-to:    #1F4D7A;

  /* Override mkdocs-material palette tokens */
  --md-primary-fg-color:        var(--tl-teal-deep);
  --md-primary-fg-color--light:  var(--tl-teal-soft);
  --md-primary-fg-color--dark:   var(--tl-navy);
  --md-primary-bg-color:        #FFFFFF;
  --md-primary-bg-color--light: rgba(255, 255, 255, 0.7);
  --md-accent-fg-color:         var(--tl-navy);
  --md-accent-fg-color--transparent: rgba(31, 77, 122, 0.1);
  --md-accent-bg-color:         #FFFFFF;
  --md-accent-bg-color--light:  rgba(255, 255, 255, 0.7);
  --md-default-bg-color:        var(--tl-paper);
  --md-default-fg-color:        var(--tl-ink);
  --md-default-fg-color--light: rgba(15, 27, 34, 0.65);
  --md-default-fg-color--lighter: rgba(15, 27, 34, 0.4);
  --md-default-fg-color--lightest: rgba(15, 27, 34, 0.07);
  --md-typeset-a-color:         var(--tl-teal-deep);
}

[data-md-color-scheme="slate"] {
  --tl-paper:      #0E141A;
  --tl-ink:        #E8EDEF;
  --tl-teal-deep:  #3FA3AE;
  --tl-teal-soft:  #5C8A92;
  --tl-navy:       #2A3B4D;
  --tl-rule:       rgba(232, 237, 239, 0.14);
  --tl-hero-from:  #1A2330;
  --tl-hero-to:    #2A3B4D;

  --md-primary-fg-color:        var(--tl-teal-deep);
  --md-primary-fg-color--light: var(--tl-teal-soft);
  --md-primary-fg-color--dark:  var(--tl-navy);
  --md-primary-bg-color:        var(--tl-ink);
  --md-primary-bg-color--light: rgba(232, 237, 239, 0.7);
  --md-accent-fg-color:         var(--tl-teal-soft);
  --md-accent-fg-color--transparent: rgba(63, 163, 174, 0.1);
  --md-default-bg-color:        var(--tl-paper);
  --md-default-fg-color:        var(--tl-ink);
  --md-default-fg-color--light: rgba(232, 237, 239, 0.65);
  --md-default-fg-color--lighter: rgba(232, 237, 239, 0.4);
  --md-typeset-a-color:         var(--tl-teal-deep);
}

/* ----------------------------------------------------------------
   2. Typography
   ---------------------------------------------------------------- */

:root {
  --md-text-font:      "IBM Plex Sans", -apple-system, BlinkMacSystemFont, "Helvetica Neue", sans-serif;
  --md-code-font:      "JetBrains Mono", "SF Mono", Menlo, Consolas, monospace;
  --tl-display-font:   "Fraunces", "Iowan Old Style", Georgia, serif;
}

body, .md-typeset {
  font-family: var(--md-text-font);
  font-feature-settings: "ss01", "cv11";
  letter-spacing: -0.005em;
}

.md-typeset h1,
.md-typeset h2 {
  font-family: var(--tl-display-font);
  font-weight: 600;
  letter-spacing: -0.02em;
}

.md-typeset h1 {
  font-variation-settings: "opsz" 96;
}

/* ----------------------------------------------------------------
   3. Hero
   ---------------------------------------------------------------- */

.tl-hero {
  position: relative;
  padding: 5rem 1.5rem 6rem;
  margin-bottom: 3rem;
  color: var(--md-primary-bg-color);
  background:
    linear-gradient(135deg,
      var(--tl-hero-from) 0%,
      var(--tl-hero-to) 100%);
  overflow: hidden;
}

/* Subtle grid texture overlay */
.tl-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.04) 1px, transparent 1px);
  background-size: 64px 64px;
  pointer-events: none;
}

.tl-hero__inner {
  position: relative;
  max-width: 60rem;
  margin: 0 auto;
}

.tl-hero__content {
  max-width: 40rem;
}

.tl-hero h1 {
  margin: 0 0 1.25rem;
  font-family: var(--tl-display-font);
  font-size: clamp(2rem, 4.5vw, 3.25rem);
  font-weight: 600;
  font-variation-settings: "opsz" 144;
  color: currentColor;
  line-height: 1.05;
  letter-spacing: -0.025em;
}

.tl-hero p {
  margin: 0 0 2.5rem;
  font-size: 1.0625rem;
  line-height: 1.55;
  opacity: 0.85;
  max-width: 32rem;
}

/* Outlined CTA buttons */
.tl-hero .md-button {
  margin: 0.25rem 0.75rem 0.25rem 0;
  padding: 0.625rem 1.25rem;
  color: var(--md-primary-bg-color);
  background-color: transparent;
  border: 1px solid currentColor;
  border-radius: 0;
  font-family: var(--md-text-font);
  font-weight: 500;
  letter-spacing: 0.01em;
  transition: background-color 200ms ease, color 200ms ease;
}

.tl-hero .md-button--primary {
  background-color: var(--md-primary-bg-color);
  color: var(--tl-hero-from);
  border-color: var(--md-primary-bg-color);
}

.tl-hero .md-button:hover,
.tl-hero .md-button:focus {
  background-color: var(--md-primary-bg-color);
  color: var(--tl-hero-from);
  border-color: var(--md-primary-bg-color);
}

.tl-hero .md-button--primary:hover,
.tl-hero .md-button--primary:focus {
  background-color: transparent;
  color: var(--md-primary-bg-color);
  border-color: var(--md-primary-bg-color);
}

/* EDA process strip — left bottom anchor */
.tl-hero__strip {
  margin-top: 3.5rem;
  padding-top: 1.25rem;
  border-top: 1px solid rgba(255, 255, 255, 0.18);
  font-family: var(--md-code-font);
  font-size: 0.6875rem;
  font-weight: 500;
  letter-spacing: 0.28em;
  text-transform: uppercase;
  color: rgba(255, 255, 255, 0.55);
}

/* Right bottom badge */
.tl-hero__badge {
  position: absolute;
  right: 1.5rem;
  bottom: 1.25rem;
  font-family: var(--md-code-font);
  font-size: 0.6875rem;
  letter-spacing: 0.18em;
  color: rgba(255, 255, 255, 0.45);
}

@media (max-width: 59.99em) {
  .tl-hero {
    padding: 3rem 1.25rem 4rem;
  }
  .tl-hero h1 {
    font-size: 1.875rem;
  }
  .tl-hero__strip {
    margin-top: 2.5rem;
    font-size: 0.625rem;
    letter-spacing: 0.2em;
  }
  .tl-hero__badge {
    display: none;
  }
}

/* ----------------------------------------------------------------
   4. Language switcher (single-click, replaces dropdown)
   ---------------------------------------------------------------- */

.md-header .md-alternate {
  transition: transform 220ms cubic-bezier(0.2, 0.7, 0.2, 1);
}

.md-header .md-alternate:hover,
.md-header .md-alternate:focus {
  transform: rotate(-12deg) scale(1.08);
}

/* ----------------------------------------------------------------
   5. Grid cards refinement
   ---------------------------------------------------------------- */

.md-typeset .grid.cards > ul > li,
.md-typeset .grid.cards > :is(ol, ul) > li {
  border: 1px solid var(--tl-rule);
  border-radius: 0;
  background: transparent;
  transition: border-color 200ms ease, transform 200ms ease;
}

.md-typeset .grid.cards > ul > li:hover {
  border-color: var(--tl-teal-deep);
  transform: translateY(-2px);
}

.md-typeset .grid.cards > ul > li > hr {
  border-color: var(--tl-rule);
  margin: 1rem 0 0.875rem;
}

/* ----------------------------------------------------------------
   6. Misc — links, code, admonitions
   ---------------------------------------------------------------- */

.md-typeset code {
  font-family: var(--md-code-font);
  font-size: 0.8125em;
  padding: 0.125em 0.4em;
  border-radius: 2px;
}

.md-typeset .admonition,
.md-typeset details {
  border-radius: 0;
  border-left-width: 3px;
}