/* ============================================================
   converters.css — Unit Converter Subsection Styles
   FuturisticMth.com | Drop into /converters/css/
   ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=Syne:wght@400;600;700;800&family=DM+Sans:ital,opsz,wght@0,9..40,300;0,9..40,400;0,9..40,500;1,9..40,300&display=swap');

/* ── CSS Variables ── */
:root {
  --cvt-bg:           #1c2333;
  --cvt-surface:      #242e42;
  --cvt-surface-2:    #2d3a52;
  --cvt-border:       #3a4a63;
  --cvt-accent:       #4fc3f7;
  --cvt-accent-2:     #9575cd;
  --cvt-accent-glow:  rgba(79, 195, 247, 0.12);
  --cvt-text:         #dce6f0;
  --cvt-text-muted:   #8fa3be;
  --cvt-text-dim:     #5a6e87;
  --cvt-font-head:    'Syne', sans-serif;
  --cvt-font-body:    'DM Sans', sans-serif;
  --cvt-radius:       12px;
  --cvt-radius-lg:    18px;
  --cvt-shadow:       0 4px 20px rgba(0,0,0,0.25);
  --cvt-shadow-glow:  0 0 40px rgba(79, 195, 247, 0.06);
  --cvt-transition:   0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ── Base Reset ── */
.cvt-section * { box-sizing: border-box; margin: 0; padding: 0; }

.cvt-section {
  font-family: var(--cvt-font-body);
  color: var(--cvt-text);
  background: var(--cvt-bg);
  min-height: 100vh;
  line-height: 1.6;
}

/* ── AdSense Banner Wrapper ── */
.cvt-adsense-wrap {
  display: flex;
  justify-content: center;
  align-items: center;
  padding: 14px 20px;
  background: var(--cvt-surface);
  border-bottom: 1px solid var(--cvt-border);
  min-height: 90px;
  overflow: hidden;
}

/* ── Breadcrumb ── */
.cvt-breadcrumb {
  padding: 14px 24px;
  font-size: 0.78rem;
  color: var(--cvt-text-muted);
  letter-spacing: 0.03em;
  border-bottom: 1px solid var(--cvt-border);
  background: var(--cvt-surface);
}
.cvt-breadcrumb a { color: var(--cvt-accent); text-decoration: none; transition: opacity var(--cvt-transition); }
.cvt-breadcrumb a:hover { opacity: 0.75; }
.cvt-breadcrumb span { margin: 0 6px; color: var(--cvt-text-dim); }

/* ── Page Layout ── */
.cvt-layout {
  display: grid;
  grid-template-columns: 220px 1fr;
  max-width: 1300px;
  margin: 0 auto;
  padding: 0 20px 60px;
  gap: 0 32px;
}
@media (max-width: 900px) {
  .cvt-layout { grid-template-columns: 1fr; padding: 0 16px 40px; }
}

/* ── Sidebar ── */
.cvt-sidebar { grid-row: 1 / 3; padding-top: 28px; }
@media (max-width: 900px) { .cvt-sidebar { grid-row: auto; padding-top: 16px; } }

.cvt-sidebar-title {
  font-family: var(--cvt-font-head);
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--cvt-text-dim);
  padding: 0 12px 10px;
  border-bottom: 1px solid var(--cvt-border);
  margin-bottom: 6px;
}
.cvt-sidebar nav { display: flex; flex-direction: column; gap: 2px; }
@media (max-width: 900px) { .cvt-sidebar nav { flex-direction: row; flex-wrap: wrap; gap: 6px; } }

.cvt-sidebar-link {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 8px 12px;
  border-radius: 8px;
  color: var(--cvt-text-muted);
  text-decoration: none;
  font-size: 0.85rem;
  transition: all var(--cvt-transition);
  border: 1px solid transparent;
}
.cvt-sidebar-link:hover { color: var(--cvt-text); background: var(--cvt-surface-2); border-color: var(--cvt-border); }
.cvt-sidebar-link.active { color: var(--cvt-accent); background: var(--cvt-accent-glow); border-color: rgba(79,195,247,0.2); font-weight: 500; }
.cvt-sidebar-link .icon { font-size: 1rem; width: 20px; text-align: center; flex-shrink: 0; }

/* ── Main ── */
.cvt-main { padding-top: 28px; }

/* ── Converter Card ── */
.cvt-card {
  background: var(--cvt-surface);
  border: 1px solid var(--cvt-border);
  border-radius: var(--cvt-radius-lg);
  padding: 28px;
  margin-bottom: 24px;
  box-shadow: var(--cvt-shadow), var(--cvt-shadow-glow);
  position: relative;
  overflow: hidden;
}
.cvt-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--cvt-accent), var(--cvt-accent-2));
}
.cvt-card-title { font-family: var(--cvt-font-head); font-size: 1.45rem; font-weight: 800; color: var(--cvt-text); margin-bottom: 4px; letter-spacing: -0.02em; }
.cvt-card-subtitle { font-size: 0.85rem; color: var(--cvt-text-muted); margin-bottom: 24px; }

/* ── Converter Tool ── */
.cvt-tool { display: grid; grid-template-columns: 1fr auto 1fr; gap: 14px; align-items: end; margin-bottom: 20px; }
@media (max-width: 640px) { .cvt-tool { grid-template-columns: 1fr; gap: 10px; } }

.cvt-field { display: flex; flex-direction: column; gap: 7px; }
.cvt-label { font-size: 0.72rem; font-weight: 600; letter-spacing: 0.08em; text-transform: uppercase; color: var(--cvt-text-dim); }

.cvt-input {
  background: var(--cvt-surface-2);
  border: 1px solid var(--cvt-border);
  border-radius: var(--cvt-radius);
  padding: 12px 14px;
  font-family: var(--cvt-font-body);
  font-size: 1.05rem;
  font-weight: 500;
  color: var(--cvt-text);
  outline: none;
  transition: border-color var(--cvt-transition), box-shadow var(--cvt-transition);
  width: 100%;
}
.cvt-input:focus { border-color: var(--cvt-accent); box-shadow: 0 0 0 3px var(--cvt-accent-glow); }
.cvt-input[readonly] { color: var(--cvt-accent); font-size: 1.1rem; font-weight: 600; cursor: default; }

.cvt-select {
  background: var(--cvt-surface-2);
  border: 1px solid var(--cvt-border);
  border-radius: var(--cvt-radius);
  padding: 11px 36px 11px 13px;
  font-family: var(--cvt-font-body);
  font-size: 0.875rem;
  color: var(--cvt-text);
  outline: none;
  cursor: pointer;
  transition: border-color var(--cvt-transition);
  width: 100%;
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath fill='%238fa3be' d='M1 1l5 5 5-5'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 13px center;
}
.cvt-select:focus { border-color: var(--cvt-accent); }

.cvt-swap-btn {
  background: var(--cvt-surface-2);
  border: 1px solid var(--cvt-border);
  border-radius: var(--cvt-radius);
  color: var(--cvt-text-muted);
  font-size: 1.1rem;
  width: 46px;
  height: 46px;
  cursor: pointer;
  transition: all var(--cvt-transition);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  align-self: flex-end;
}
.cvt-swap-btn:hover { background: var(--cvt-accent-glow); border-color: var(--cvt-accent); color: var(--cvt-accent); transform: rotate(180deg); }

/* ── Result ── */
.cvt-result {
  background: var(--cvt-surface-2);
  border: 1px solid var(--cvt-border);
  border-radius: var(--cvt-radius);
  padding: 14px 18px;
  margin-bottom: 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  flex-wrap: wrap;
}
.cvt-result-formula { font-size: 0.8rem; color: var(--cvt-text-dim); font-style: italic; }
.cvt-result-value { font-family: var(--cvt-font-head); font-size: 1.2rem; font-weight: 700; color: var(--cvt-accent); }

/* ── Reference Table ── */
.cvt-table-wrap { overflow-x: auto; border-radius: var(--cvt-radius); border: 1px solid var(--cvt-border); }
.cvt-table-title { font-family: var(--cvt-font-head); font-size: 0.8rem; font-weight: 700; letter-spacing: 0.06em; text-transform: uppercase; color: var(--cvt-text-muted); padding: 12px 16px 8px; border-bottom: 1px solid var(--cvt-border); }
.cvt-table { width: 100%; border-collapse: collapse; font-size: 0.85rem; }
.cvt-table thead tr { background: var(--cvt-surface-2); }
.cvt-table th { padding: 9px 16px; text-align: left; font-size: 0.72rem; font-weight: 600; letter-spacing: 0.06em; text-transform: uppercase; color: var(--cvt-text-dim); }
.cvt-table td { padding: 9px 16px; border-top: 1px solid var(--cvt-border); color: var(--cvt-text-muted); }
.cvt-table td:first-child { color: var(--cvt-text); font-weight: 500; }
.cvt-table tr:hover td { background: var(--cvt-surface-2); }

/* ── Article ── */
.cvt-article { background: var(--cvt-surface); border: 1px solid var(--cvt-border); border-radius: var(--cvt-radius-lg); padding: 36px 40px; line-height: 1.8; }
@media (max-width: 640px) { .cvt-article { padding: 22px 18px; } .cvt-card { padding: 18px; } }

.cvt-article h1 { font-family: var(--cvt-font-head); font-size: 1.85rem; font-weight: 800; letter-spacing: -0.03em; color: var(--cvt-text); margin-bottom: 14px; line-height: 1.2; }
.cvt-article h2 { font-family: var(--cvt-font-head); font-size: 1.15rem; font-weight: 700; color: var(--cvt-text); margin: 32px 0 12px; padding-bottom: 8px; border-bottom: 1px solid var(--cvt-border); }
.cvt-article h2:first-of-type { margin-top: 20px; }
.cvt-article p { color: var(--cvt-text-muted); margin-bottom: 14px; font-size: 0.93rem; }
.cvt-article ul, .cvt-article ol { color: var(--cvt-text-muted); padding-left: 20px; margin-bottom: 14px; font-size: 0.93rem; }
.cvt-article li { margin-bottom: 5px; }
.cvt-article strong { color: var(--cvt-text); font-weight: 600; }
.cvt-article table { width: 100%; border-collapse: collapse; margin: 18px 0; font-size: 0.85rem; border-radius: var(--cvt-radius); overflow: hidden; border: 1px solid var(--cvt-border); }
.cvt-article th { background: var(--cvt-surface-2); padding: 10px 14px; text-align: left; font-size: 0.72rem; letter-spacing: 0.06em; text-transform: uppercase; color: var(--cvt-text-dim); font-weight: 600; }
.cvt-article td { padding: 10px 14px; border-top: 1px solid var(--cvt-border); color: var(--cvt-text-muted); }
.cvt-article tr:hover td { background: var(--cvt-surface-2); }

/* ── FAQ ── */
.cvt-faq { margin: 8px 0; }
.cvt-faq-item { border: 1px solid var(--cvt-border); border-radius: var(--cvt-radius); margin-bottom: 7px; overflow: hidden; }
.cvt-faq-q { padding: 13px 17px; font-weight: 600; font-size: 0.88rem; color: var(--cvt-text); cursor: pointer; display: flex; justify-content: space-between; align-items: center; background: var(--cvt-surface-2); transition: background var(--cvt-transition); user-select: none; }
.cvt-faq-q:hover { background: var(--cvt-border); }
.cvt-faq-q::after { content: '+'; color: var(--cvt-accent); font-size: 1.2rem; font-weight: 300; transition: transform var(--cvt-transition); flex-shrink: 0; }
.cvt-faq-item.open .cvt-faq-q::after { transform: rotate(45deg); }
.cvt-faq-a { display: none; padding: 13px 17px; font-size: 0.86rem; color: var(--cvt-text-muted); line-height: 1.7; border-top: 1px solid var(--cvt-border); }
.cvt-faq-item.open .cvt-faq-a { display: block; }

/* ── Related Links ── */
.cvt-related { display: flex; flex-wrap: wrap; gap: 9px; margin-top: 10px; }
.cvt-related-link { display: inline-flex; align-items: center; gap: 6px; padding: 7px 15px; background: var(--cvt-surface-2); border: 1px solid var(--cvt-border); border-radius: 999px; color: var(--cvt-text-muted); text-decoration: none; font-size: 0.82rem; font-weight: 500; transition: all var(--cvt-transition); }
.cvt-related-link:hover { color: var(--cvt-accent); border-color: var(--cvt-accent); background: var(--cvt-accent-glow); }

/* ── Hub Page ── */
.cvt-hub-hero { padding: 52px 20px 36px; text-align: center; max-width: 680px; margin: 0 auto; }
.cvt-hub-hero h1 { font-family: var(--cvt-font-head); font-size: clamp(1.9rem, 5vw, 3rem); font-weight: 800; letter-spacing: -0.04em; color: var(--cvt-text); margin-bottom: 12px; line-height: 1.1; }
.cvt-hub-hero h1 span { background: linear-gradient(135deg, var(--cvt-accent), var(--cvt-accent-2)); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
.cvt-hub-hero p { color: var(--cvt-text-muted); font-size: 1rem; line-height: 1.7; }

.cvt-hub-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(230px, 1fr)); gap: 14px; max-width: 1200px; margin: 0 auto; padding: 0 20px 50px; }

.cvt-hub-card { background: var(--cvt-surface); border: 1px solid var(--cvt-border); border-radius: var(--cvt-radius-lg); padding: 22px; text-decoration: none; display: block; transition: all var(--cvt-transition); position: relative; overflow: hidden; }
.cvt-hub-card::before { content: ''; position: absolute; inset: 0; background: linear-gradient(135deg, var(--cvt-accent-glow), transparent); opacity: 0; transition: opacity var(--cvt-transition); }
.cvt-hub-card:hover { border-color: rgba(79,195,247,0.35); transform: translateY(-3px); box-shadow: var(--cvt-shadow), 0 0 28px rgba(79,195,247,0.06); }
.cvt-hub-card:hover::before { opacity: 1; }
.cvt-hub-card-icon { font-size: 1.9rem; margin-bottom: 10px; display: block; }
.cvt-hub-card-name { font-family: var(--cvt-font-head); font-size: 0.97rem; font-weight: 700; color: var(--cvt-text); margin-bottom: 4px; }
.cvt-hub-card-desc { font-size: 0.78rem; color: var(--cvt-text-dim); line-height: 1.5; }
.cvt-hub-card-arrow { position: absolute; top: 18px; right: 18px; color: var(--cvt-text-dim); font-size: 0.88rem; transition: all var(--cvt-transition); }
.cvt-hub-card:hover .cvt-hub-card-arrow { color: var(--cvt-accent); transform: translate(3px,-3px); }

/* ── Cookie Banner ── */
#cvt-cookie-banner {
  position: fixed;
  bottom: 0; left: 0; right: 0;
  z-index: 9999;
  background: var(--cvt-surface);
  border-top: 2px solid var(--cvt-accent);
  box-shadow: 0 -6px 32px rgba(0,0,0,0.4);
  padding: 18px 28px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  flex-wrap: wrap;
  font-family: var(--cvt-font-body);
  transform: translateY(100%);
  transition: transform 0.45s cubic-bezier(0.4, 0, 0.2, 1);
}
#cvt-cookie-banner.visible { transform: translateY(0); }

#cvt-cookie-banner p { color: var(--cvt-text-muted); font-size: 0.86rem; line-height: 1.6; flex: 1; min-width: 220px; margin: 0; }
#cvt-cookie-banner p a { color: var(--cvt-accent); text-decoration: underline; text-underline-offset: 2px; }
#cvt-cookie-banner p a:hover { opacity: 0.8; }

.cvt-cookie-actions { display: flex; gap: 10px; flex-shrink: 0; flex-wrap: wrap; }
.cvt-cookie-btn { padding: 9px 22px; border-radius: 8px; font-family: var(--cvt-font-body); font-size: 0.86rem; font-weight: 600; cursor: pointer; border: none; transition: all var(--cvt-transition); white-space: nowrap; }
.cvt-cookie-btn-accept { background: var(--cvt-accent); color: #111827; }
.cvt-cookie-btn-accept:hover { opacity: 0.88; transform: translateY(-1px); }
.cvt-cookie-btn-decline { background: transparent; color: var(--cvt-text-muted); border: 1px solid var(--cvt-border); }
.cvt-cookie-btn-decline:hover { border-color: var(--cvt-text-muted); color: var(--cvt-text); }

@media (max-width: 540px) {
  #cvt-cookie-banner { flex-direction: column; align-items: flex-start; }
  .cvt-cookie-actions { width: 100%; }
  .cvt-cookie-btn { flex: 1; text-align: center; }
}

/* ── Animations ── */
@keyframes cvt-fade-up { from { opacity: 0; transform: translateY(16px); } to { opacity: 1; transform: translateY(0); } }
.cvt-card, .cvt-article { animation: cvt-fade-up 0.4s ease both; }
.cvt-hub-card { animation: cvt-fade-up 0.45s ease both; }
.cvt-hub-card:nth-child(2)  { animation-delay: 0.04s; }
.cvt-hub-card:nth-child(3)  { animation-delay: 0.08s; }
.cvt-hub-card:nth-child(4)  { animation-delay: 0.12s; }
.cvt-hub-card:nth-child(5)  { animation-delay: 0.16s; }
.cvt-hub-card:nth-child(6)  { animation-delay: 0.20s; }
.cvt-hub-card:nth-child(7)  { animation-delay: 0.24s; }
.cvt-hub-card:nth-child(8)  { animation-delay: 0.28s; }
.cvt-hub-card:nth-child(9)  { animation-delay: 0.32s; }
.cvt-hub-card:nth-child(10) { animation-delay: 0.36s; }
.cvt-hub-card:nth-child(11) { animation-delay: 0.40s; }
.cvt-hub-card:nth-child(12) { animation-delay: 0.44s; }
.cvt-hub-card:nth-child(13) { animation-delay: 0.48s; }