/* ───────────────────────────────────────────
   CleanCalc Help – Custom Styles
   ─────────────────────────────────────────── */

/* Local Inter Font */
@font-face {
  font-family: 'Inter';
  font-style: normal;
  font-weight: 100 900;
  font-display: swap;
  src: url('../fonts/inter.woff2') format('woff2');
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6,
    U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122,
    U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}

:root {
  --cc-blue-500: #3b82f6;
  --cc-blue-600: #2563eb;
  --cc-blue-700: #1d4ed8;
  --cc-blue-50: #eff6ff;
  --cc-slate-900: #0f172a;
  --cc-slate-700: #334155;
  --cc-slate-500: #64748b;
  --cc-slate-200: #e2e8f0;
  --cc-slate-100: #f1f5f9;
  --cc-slate-50: #f8fafc;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: 5rem;
}

body {
  font-family: 'Inter', ui-sans-serif, system-ui, sans-serif;
  color: var(--cc-slate-700);
  background: var(--cc-slate-50);
}

/* Sidebar */
.help-sidebar {
  scrollbar-width: thin;
  scrollbar-color: var(--cc-slate-200) transparent;
}
.help-sidebar::-webkit-scrollbar { width: 4px; }
.help-sidebar::-webkit-scrollbar-thumb { background: var(--cc-slate-200); border-radius: 9999px; }

.sidebar-link {
  display: flex;
  align-items: center;
  gap: .5rem;
  padding: .5rem .75rem;
  border-radius: .5rem;
  font-size: .875rem;
  color: var(--cc-slate-500);
  transition: all .15s ease;
  text-decoration: none;
}
.sidebar-link:hover,
.sidebar-link.active {
  color: var(--cc-blue-600);
  background: var(--cc-blue-50);
  font-weight: 500;
}
.sidebar-link.active {
  border-left: 3px solid var(--cc-blue-600);
}

/* Content cards */
.help-card {
  background: #fff;
  border: 1px solid var(--cc-slate-200);
  border-radius: 1rem;
  padding: 2rem;
  margin-bottom: 2rem;
  scroll-margin-top: 5.5rem;
  transition: box-shadow .2s ease;
}
.help-card:hover {
  box-shadow: 0 4px 24px rgba(0,0,0,.06);
}

/* Step indicators */
.step-number {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2rem;
  height: 2rem;
  border-radius: 50%;
  background: var(--cc-blue-600);
  color: #fff;
  font-weight: 700;
  font-size: .875rem;
  flex-shrink: 0;
}

/* Info boxes */
.info-box {
  border-radius: .75rem;
  padding: 1rem 1.25rem;
  margin: 1rem 0;
  display: flex;
  gap: .75rem;
  align-items: flex-start;
  font-size: .875rem;
  line-height: 1.5;
}
.info-box.tip    { background: #ecfdf5; border-left: 4px solid #10b981; color: #065f46; }
.info-box.warn   { background: #fffbeb; border-left: 4px solid #f59e0b; color: #92400e; }
.info-box.info   { background: #eff6ff; border-left: 4px solid #3b82f6; color: #1e40af; }

/* Keyboard shortcut badges */
kbd {
  display: inline-block;
  padding: .15rem .4rem;
  font-family: 'Inter', monospace;
  font-size: .75rem;
  font-weight: 600;
  line-height: 1;
  color: var(--cc-slate-700);
  background: var(--cc-slate-100);
  border: 1px solid var(--cc-slate-200);
  border-radius: .3rem;
  box-shadow: 0 1px 0 var(--cc-slate-200);
}

/* FAQ accordion */
.faq-item summary {
  cursor: pointer;
  list-style: none;
  padding: 1rem 1.25rem;
  font-weight: 600;
  color: var(--cc-slate-900);
  display: flex;
  align-items: center;
  gap: .75rem;
  border-radius: .75rem;
  transition: background .15s ease;
}
.faq-item summary:hover { background: var(--cc-slate-50); }
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary .chevron { transition: transform .2s ease; }
.faq-item[open] summary .chevron { transform: rotate(90deg); }
.faq-item .faq-body {
  padding: 0 1.25rem 1rem 3rem;
  color: var(--cc-slate-500);
  font-size: .875rem;
  line-height: 1.7;
}

/* Search input */
.search-input {
  width: 100%;
  padding: .75rem 1rem .75rem 2.75rem;
  border-radius: .75rem;
  border: 1px solid var(--cc-slate-200);
  background: #fff;
  font-size: .875rem;
  color: var(--cc-slate-900);
  outline: none;
  transition: border-color .15s ease, box-shadow .15s ease;
}
.search-input:focus {
  border-color: var(--cc-blue-500);
  box-shadow: 0 0 0 3px rgba(59, 130, 246, .15);
}

/* Feature grid card */
.feature-mini-card {
  background: var(--cc-slate-50);
  border: 1px solid var(--cc-slate-200);
  border-radius: .75rem;
  padding: 1.25rem;
  text-align: center;
  transition: all .2s ease;
}
.feature-mini-card:hover {
  border-color: var(--cc-blue-500);
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(59, 130, 246, .1);
}

/* Back to top */
.back-to-top {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  width: 2.75rem;
  height: 2.75rem;
  border-radius: 50%;
  background: var(--cc-blue-600);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 12px rgba(37, 99, 235, .3);
  opacity: 0;
  transform: translateY(1rem);
  transition: opacity .2s ease, transform .2s ease;
  cursor: pointer;
  z-index: 50;
  text-decoration: none;
}
.back-to-top.visible {
  opacity: 1;
  transform: translateY(0);
}

/* Mobile menu overlay */
.mobile-sidebar-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,.4);
  z-index: 40;
  opacity: 0;
  pointer-events: none;
  transition: opacity .2s ease;
}
.mobile-sidebar-overlay.open {
  opacity: 1;
  pointer-events: auto;
}

/* Desktop sidebar (≥1024px) */
@media (min-width: 1024px) {
  .help-sidebar-wrapper {
    position: fixed;
    top: 4rem;       /* h-16 = 4rem header */
    left: 0;
    bottom: 0;
    width: 16rem;    /* w-64 = 16rem */
    background: #fff;
    border-right: 1px solid var(--cc-slate-200);
    z-index: 30;
    box-shadow: none;
    transform: none;
  }
  .help-main {
    margin-left: 16rem;  /* ml-64 */
  }
}

/* Mobile sidebar (<1024px) */
@media (max-width: 1023px) {
  .help-sidebar-wrapper {
    position: fixed;
    top: 0;
    left: 0;
    bottom: 0;
    width: 280px;
    z-index: 50;
    background: #fff;
    transform: translateX(-100%);
    transition: transform .25s ease;
    padding-top: 4rem;
    box-shadow: 4px 0 16px rgba(0,0,0,.1);
  }
  .help-sidebar-wrapper.open {
    transform: translateX(0);
  }
}

/* Search highlight */
mark.search-hl {
  background: #fef08a;
  color: inherit;
  padding: .05em .15em;
  border-radius: .2rem;
  box-shadow: 0 0 0 1px rgba(250, 204, 21, .5);
}

/* Search results counter */
.search-result-counter {
  position: fixed;
  top: 4.5rem;
  left: 50%;
  transform: translateX(-50%);
  z-index: 35;
  display: inline-flex;
  align-items: center;
  gap: .5rem;
  padding: .4rem 1rem;
  background: #fff;
  border: 1px solid var(--cc-slate-200);
  border-radius: 2rem;
  font-size: .8rem;
  color: var(--cc-slate-700);
  box-shadow: 0 2px 12px rgba(0,0,0,.08);
  animation: counterSlideIn .2s ease;
}
.search-clear-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 1.4rem;
  height: 1.4rem;
  border-radius: 50%;
  background: var(--cc-slate-100);
  color: var(--cc-slate-500);
  border: none;
  cursor: pointer;
  font-size: .65rem;
  transition: background .15s;
}
.search-clear-btn:hover {
  background: #fee2e2;
  color: #dc2626;
}
@keyframes counterSlideIn {
  from { opacity: 0; transform: translateX(-50%) translateY(-.5rem); }
  to   { opacity: 1; transform: translateX(-50%) translateY(0); }
}

/* No results state */
.search-no-results {
  text-align: center;
  padding: 3rem 1rem;
}

/* Print styles */
@media print {
  .help-sidebar-wrapper,
  .help-header,
  .back-to-top,
  .mobile-sidebar-overlay { display: none !important; }
  .help-main { margin-left: 0 !important; }
  .help-card { break-inside: avoid; box-shadow: none; border: 1px solid #ddd; }
}