/* =============================================
   CaseForge – Main Stylesheet
   Colours, fonts, tool bar and theme come from ../shared/rm-tools.css
   ============================================= */

/* ---------- CSS Custom Properties (mapped to the shared theme) ---------- */
:root {
  --clr-primary:       var(--rm-primary);
  --clr-primary-dark:  var(--rm-primary-hover);
  --clr-primary-light: var(--rm-primary-soft);
  --clr-accent:        var(--rm-amber);

  --clr-bg:            var(--rm-bg);
  --clr-surface:       var(--rm-surface);
  --clr-surface-2:     var(--rm-surface-2);
  --clr-border:        var(--rm-border);

  --clr-text:          var(--rm-text);
  --clr-text-muted:    var(--rm-muted);

  --radius-sm:  var(--rm-radius-sm);
  --radius-md:  var(--rm-radius);
  --radius-lg:  var(--rm-radius);
  --radius-xl:  var(--rm-radius-lg);

  --shadow-sm:  var(--rm-shadow-sm);
  --shadow-md:  var(--rm-shadow-md);
  --shadow-lg:  var(--rm-shadow-lg);

  --transition: var(--rm-ease);
}

/* ---------- Reset ---------- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; scroll-padding-top: 80px; }
body {
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}
a { color: var(--clr-primary); text-decoration: none; }
a:hover { text-decoration: underline; }
ul { list-style: none; }
img, svg { display: block; }
button { cursor: pointer; font-family: inherit; }

/* ---------- Layout Helpers ---------- */
.container {
  width: 100%;
  max-width: 1100px;
  margin-inline: auto;
  padding-inline: 1.25rem;
}
main { flex: 1; }

/* =============================================
   HERO SECTION (blueprint band from rm-tools.css)
   ============================================= */
.hero {
  padding: 3rem 0 2.5rem;
  text-align: center;
}
.hero h1 {
  font-size: clamp(2rem, 5vw, 3.1rem);
  font-weight: 700;
  line-height: 1.1;
  margin-bottom: .6rem;
}
.hero p {
  font-size: 1.05rem;
  max-width: 540px;
  margin-inline: auto;
}

/* =============================================
   CONVERTER CARD
   ============================================= */
.converter-section { padding: 2.5rem 0 3rem; }

.converter-card {
  background: var(--clr-surface);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-lg);
  overflow: hidden;
  transition: background var(--transition), border-color var(--transition);
}

/* Textarea */
.textarea-wrap { position: relative; }
#input-text {
  width: 100%;
  min-height: 220px;
  padding: 1.25rem;
  font-size: 1rem;
  font-family: inherit;
  line-height: 1.7;
  border: none;
  outline: none;
  resize: vertical;
  background: var(--clr-surface);
  color: var(--clr-text);
  transition: background var(--transition), color var(--transition);
}
#input-text::placeholder { color: var(--clr-text-muted); }
.textarea-border { height: 1px; background: var(--clr-border); }

/* Stats bar */
.stats-bar {
  display: flex;
  flex-wrap: wrap;
  gap: .5rem 1.5rem;
  padding: .75rem 1.25rem;
  background: var(--clr-surface-2);
  font-size: .85rem;
  color: var(--clr-text-muted);
}
.stat { display: flex; align-items: center; gap: .35rem; }
.stat-label { font-weight: 500; }
.stat-value { font-weight: 600; font-family: var(--rm-mono); color: var(--clr-primary); }

/* Case conversion buttons */
.case-buttons-section { padding: 1.25rem 1.25rem .75rem; }
.case-buttons-section h2 {
  font: 600 .72rem var(--rm-mono);
  text-transform: uppercase;
  letter-spacing: .18em;
  color: var(--clr-text-muted);
  margin-bottom: .85rem;
}
.case-buttons {
  display: flex;
  flex-wrap: wrap;
  gap: .5rem;
}

.case-btn {
  padding: .5rem 1rem;
  border-radius: var(--radius-md);
  border: 1px solid var(--clr-border);
  background: var(--clr-surface);
  color: var(--clr-text);
  font-size: .875rem;
  font-weight: 500;
  transition: background var(--transition), border-color var(--transition),
              color var(--transition), box-shadow var(--transition), transform .1s;
}
.case-btn:hover {
  background: var(--clr-primary-light);
  border-color: var(--clr-primary);
  color: var(--clr-primary);
  box-shadow: var(--shadow-sm);
  transform: translateY(-1px);
}
.case-btn.active {
  background: var(--clr-primary);
  border-color: var(--clr-primary);
  color: var(--rm-primary-ink);
  box-shadow: var(--shadow-md);
}

/* Divider */
.section-divider { height: 1px; background: var(--clr-border); margin: 0 1.25rem; }

/* Action toolbar */
.action-bar {
  display: flex;
  flex-wrap: wrap;
  gap: .6rem;
  padding: 1rem 1.25rem;
  align-items: center;
}

.action-btn {
  display: inline-flex;
  align-items: center;
  gap: .4rem;
  padding: .5rem 1rem;
  border-radius: var(--radius-md);
  border: 1px solid var(--clr-border);
  background: var(--clr-surface);
  color: var(--clr-text);
  font-size: .875rem;
  font-weight: 600;
  transition: background var(--transition), border-color var(--transition), color var(--transition);
}
.action-btn svg { width: 15px; height: 15px; flex-shrink: 0; }
.action-btn:hover {
  background: var(--clr-primary-light);
  border-color: var(--clr-primary);
  color: var(--clr-primary);
}
.action-btn.danger:hover {
  background: transparent;
  border-color: var(--rm-danger);
  color: var(--rm-danger);
}
.action-btn.success {
  border-color: var(--rm-success);
  color: var(--rm-success);
}

.ml-auto { margin-left: auto; }

/* Toast notification */
.toast {
  position: fixed;
  bottom: 2rem;
  left: 50%;
  transform: translateX(-50%) translateY(100px);
  background: var(--rm-text);
  color: var(--rm-bg);
  padding: .65rem 1.4rem;
  border-radius: var(--radius-md);
  font-size: .9rem;
  font-weight: 600;
  box-shadow: var(--shadow-lg);
  z-index: 999;
  opacity: 0;
  transition: transform .3s ease, opacity .3s ease;
  pointer-events: none;
  white-space: nowrap;
}
.toast.show {
  transform: translateX(-50%) translateY(0);
  opacity: 1;
}

/* =============================================
   REFERENCE SECTION (case descriptions)
   ============================================= */
.reference-section {
  padding: 3rem 0;
  background: var(--clr-surface-2);
  border-top: 1px solid var(--clr-border);
}
.reference-section h2 {
  font-size: 1.9rem;
  font-weight: 700;
  margin-bottom: .5rem;
}
.reference-section .section-subtitle {
  color: var(--clr-text-muted);
  margin-bottom: 2rem;
}
.reference-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1.25rem;
}
.ref-card {
  background: var(--clr-surface);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius-lg);
  padding: 1.25rem 1.4rem;
  transition: box-shadow var(--transition), transform var(--transition), border-color var(--transition);
}
.ref-card:hover { box-shadow: var(--shadow-md); transform: translateY(-2px); border-color: var(--clr-primary); }
.ref-card h3 { font-size: 1.2rem; font-weight: 700; margin-bottom: .35rem; }
.ref-card .example {
  font-family: var(--rm-mono);
  font-size: .82rem;
  background: var(--clr-surface-2);
  color: var(--clr-primary);
  border: 1px solid var(--clr-border);
  padding: .3rem .6rem;
  border-radius: var(--radius-sm);
  display: inline-block;
  margin-bottom: .5rem;
}
.ref-card p { font-size: .875rem; color: var(--clr-text-muted); }

/* =============================================
   ABOUT SECTION
   ============================================= */
#about {
  padding: 3.5rem 0;
}
.about-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
  align-items: center;
}
.about-text h2 { font-size: 2.1rem; font-weight: 700; margin-bottom: 1rem; }
.about-text p { color: var(--clr-text-muted); line-height: 1.8; margin-bottom: .75rem; }
.feature-list { display: flex; flex-direction: column; gap: .75rem; margin-top: 1.25rem; }
.feature-item {
  display: flex;
  align-items: center;
  gap: .85rem;
  font-size: .9rem;
}
.feature-item .rm-icon { width: 34px; height: 34px; }
.feature-item .rm-icon svg { width: 17px; height: 17px; }
.about-visual {
  border-radius: var(--radius-xl);
  padding: 2.5rem;
}
.demo-cases { display: flex; flex-direction: column; gap: .85rem; }
.demo-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: rgba(173,216,255,.08);
  border: 1px solid rgba(173,216,255,.18);
  border-radius: var(--radius-md);
  padding: .65rem 1rem;
  font-size: .88rem;
}
.demo-row .label { color: var(--rm-hero-muted); font-weight: 500; }
.demo-row .value { font-weight: 600; font-family: var(--rm-mono); color: var(--rm-amber); }

/* =============================================
   RESPONSIVE
   ============================================= */
@media (max-width: 768px) {
  .about-inner { grid-template-columns: 1fr; }
}

@media (max-width: 480px) {
  .action-bar { gap: .4rem; }
  .action-btn { padding: .45rem .75rem; font-size: .8rem; }
}