/* ====== CalcNinja Complete Stylesheet ====== */

:root {
  --primary: #2563EB;
  --primary-dark: #1D4ED8;
  --accent: #059669;
  --bg: #F8FAFC;
  --bg-card: #FFFFFF;
  --text: #0F172A;
  --text-muted: #64748B;
  --border: #E2E8F0;
  --success-bg: #DCFCE7;
  --success-border: #16A34A;
  --success-text: #14532D;
  --warning: #F59E0B;
  --danger: #DC2626;
  --whatsapp: #25D366;
}

[data-theme="dark"] {
  --bg: #0F172A;
  --bg-card: #1E293B;
  --text: #F1F5F9;
  --text-muted: #94A3B8;
  --border: #334155;
}

*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html { scroll-behavior: smooth; -webkit-font-smoothing: antialiased; }

body {
  font-family: 'Plus Jakarta Sans', 'Inter', system-ui, -apple-system, sans-serif;
  background-color: var(--bg); color: var(--text); line-height: 1.6;
  font-size: 16px; transition: background-color 0.3s, color 0.3s;
}

h1, h2, h3, h4, h5, h6 {
  font-family: 'Plus Jakarta Sans', system-ui, sans-serif;
  font-weight: 700; line-height: 1.2; letter-spacing: -0.02em;
}

h1 { font-size: clamp(1.8rem, 4vw, 2.8rem); margin-bottom: 1rem; }
h2 { font-size: clamp(1.4rem, 3vw, 2.2rem); margin-bottom: 1rem; }
h3 { font-size: clamp(1.1rem, 2.5vw, 1.6rem); margin-bottom: 0.75rem; }

p { font-family: 'Inter', system-ui, sans-serif; margin-bottom: 1rem; line-height: 1.7; }

a {
  color: var(--primary); text-decoration: none; transition: color 0.2s;
}

a:hover { color: var(--primary-dark); text-decoration: underline; }

ul, ol { margin-left: 1.5rem; margin-bottom: 1rem; }
li { margin-bottom: 0.5rem; }

/* HEADER + NAV */
header {
  position: sticky; top: 0; z-index: 100;
  background: rgba(248, 250, 252, 0.96); backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--border);
  padding: 0 1.25rem; display: flex; align-items: center;
  justify-content: space-between; height: 64px; transition: all 0.2s;
}

[data-theme="dark"] header { background: rgba(15, 23, 42, 0.96); }

header.scrolled { box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08); }

.logo {
  font-size: 1.35rem; font-weight: 700; color: var(--primary);
  text-decoration: none; letter-spacing: -0.02em;
  display: flex; align-items: center; gap: 0.5rem;
}

.logo:hover { text-decoration: none; }

.desktop-nav {
  display: flex; gap: 2rem; align-items: center;
  flex: 1; justify-content: center;
}

.desktop-nav a { font-weight: 600; font-size: 0.95rem; letter-spacing: -0.01em; }
.desktop-nav a:hover { color: var(--primary-dark); }

.header-actions {
  display: flex; gap: 1rem; align-items: center;
}

.theme-toggle {
  background: none; border: none; font-size: 1.2rem;
  cursor: pointer; padding: 0.5rem; border-radius: 8px;
  transition: background 0.2s;
}

.theme-toggle:hover { background: var(--border); }

.hamburger {
  display: none; background: none; border: none;
  font-size: 1.4rem; cursor: pointer; padding: 0.5rem;
}

@media (max-width: 768px) {
  .desktop-nav { display: none; }
  .hamburger { display: block; }
}

/* MOBILE NAV */
.mobile-nav {
  position: fixed; top: 64px; left: 0; right: 0;
  background: var(--bg-card); border-bottom: 1px solid var(--border);
  padding: 1rem; display: flex; flex-direction: column;
  gap: 0.5rem; max-height: calc(100vh - 64px);
  overflow-y: auto; transform: translateY(-100%);
  transition: transform 0.3s; z-index: 99;
}

.mobile-nav.open { transform: translateY(0); }

.mobile-nav a {
  padding: 1rem; border-radius: 10px; background: var(--bg);
  font-weight: 500; display: block;
}

.mobile-nav a:hover { background: var(--border); }

/* MAIN */
main {
  max-width: 1280px; margin: 0 auto; padding: 0 1.25rem;
}

/* MASCOT + HERO */
.mascot-row {
  text-align: center; padding: 2rem 1rem 0;
  display: flex; flex-direction: column; align-items: center; gap: 0.5rem;
}

.mascot { font-size: 4rem; animation: wave 2.5s infinite; }

@keyframes wave {
  0%, 100% { transform: rotate(0deg); }
  10%, 20% { transform: rotate(14deg); }
  30%, 40% { transform: rotate(-8deg); }
  50% { transform: rotate(14deg); }
  60% { transform: rotate(0deg); }
}

.mascot-bubble {
  background: linear-gradient(135deg, #2563EB, #1D4ED8);
  color: white; padding: 1rem 1.5rem; border-radius: 20px;
  font-size: 0.95rem; max-width: 400px; line-height: 1.5;
  box-shadow: 0 4px 16px rgba(37, 99, 235, 0.25);
}

.hero { text-align: center; padding: 2rem 1rem; }

.text-primary { color: var(--primary); }

.hero-sub {
  font-size: 1.1rem; color: var(--text-muted);
  margin-bottom: 2rem; max-width: 600px;
  margin-left: auto; margin-right: auto;
}

.search-wrap { max-width: 600px; margin: 0 auto 2rem; }

.search-wrap input {
  width: 100%; height: 52px; padding: 0 1.5rem;
  font-size: 16px; border: 2px solid var(--border);
  border-radius: 50px; background: var(--bg-card);
  color: var(--text); transition: all 0.2s;
}

.search-wrap input:focus {
  outline: none; border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.trust-badges {
  display: flex; justify-content: center;
  flex-wrap: wrap; gap: 1rem; padding: 1rem 0;
}

.badge {
  background: var(--success-bg); color: var(--success-text);
  padding: 0.5rem 1rem; border-radius: 50px;
  font-size: 0.85rem; font-weight: 600;
  border: 1px solid var(--success-border);
}

/* QUICK CALC SECTION */
.quick-calc-section {
  background: linear-gradient(135deg, var(--bg-card), rgba(37, 99, 235, 0.03));
  border-radius: 20px; border: 1px solid var(--border);
  padding: 2rem; margin: 3rem 0;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.04);
}

.quick-calc-tabs {
  display: flex; gap: 0.75rem; margin-bottom: 2rem;
  border-bottom: 2px solid var(--border); flex-wrap: wrap;
}

.qtab {
  background: none; border: none; padding: 0.75rem 1.5rem;
  font-size: 0.95rem; font-weight: 600; cursor: pointer;
  color: var(--text-muted); border-bottom: 3px solid transparent;
  margin-bottom: -2px; transition: all 0.2s; min-height: 48px;
}

.qtab:hover { color: var(--text); }

.qtab.active {
  color: var(--primary); border-bottom-color: var(--primary);
}

.quick-calc-body { position: relative; }

.qc-panel {
  display: none; animation: fadeIn 0.3s;
}

.qc-panel.active { display: block; }

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

.qc-input-row {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 1.5rem; margin-bottom: 2rem;
}

.qc-field { display: flex; flex-direction: column; }

.qc-field label {
  font-weight: 600; margin-bottom: 0.5rem; font-size: 0.9rem;
  display: flex; justify-content: space-between; align-items: center;
}

.qc-val {
  background: var(--primary); color: white;
  padding: 0.3rem 0.8rem; border-radius: 20px;
  font-size: 0.8rem; font-weight: 700;
}

/* RANGE SLIDERS */
.range-input, input[type="range"] {
  width: 100%; height: 8px; border-radius: 10px;
  background: var(--border); outline: none;
  -webkit-appearance: none; cursor: pointer;
}

.range-input::-webkit-slider-thumb, input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none; appearance: none;
  width: 28px; height: 28px; border-radius: 50%;
  background: var(--primary); cursor: pointer;
  box-shadow: 0 2px 8px rgba(37, 99, 235, 0.4);
  transition: all 0.2s;
}

.range-input::-webkit-slider-thumb:hover, input[type="range"]::-webkit-slider-thumb:hover {
  width: 32px; height: 32px; box-shadow: 0 4px 12px rgba(37, 99, 235, 0.6);
}

.range-input::-moz-range-thumb, input[type="range"]::-moz-range-thumb {
  width: 28px; height: 28px; border-radius: 50%;
  background: var(--primary); cursor: pointer; border: none;
  box-shadow: 0 2px 8px rgba(37, 99, 235, 0.4);
  transition: all 0.2s;
}

.range-input::-moz-range-track, input[type="range"]::-moz-range-track {
  background: transparent; border: none;
}

/* QC RESULT BOX */
.qc-result {
  background: linear-gradient(135deg, var(--success-bg), rgba(5, 150, 105, 0.05));
  border: 2px solid var(--success-border); border-radius: 16px;
  padding: 2rem; margin-top: 2rem;
}

.qc-result-label { font-size: 0.9rem; color: var(--text-muted); margin-bottom: 0.5rem; }

.qc-result-main {
  font-size: clamp(2.5rem, 6vw, 3.5rem); font-weight: 700;
  color: var(--success-text); line-height: 1; margin-bottom: 0.5rem;
}

.qc-result-detail { font-size: 0.95rem; color: var(--text-muted); margin-bottom: 1.5rem; }

.qc-actions {
  display: flex; gap: 0.75rem; flex-wrap: wrap;
}

.btn-wa, .btn-copy, .btn-detail {
  padding: 0.75rem 1.25rem; border-radius: 10px; border: none;
  font-size: 0.9rem; font-weight: 600; cursor: pointer;
  transition: all 0.2s; min-height: 44px;
  display: flex; align-items: center; justify-content: center; gap: 0.5rem;
}

.btn-wa {
  background: var(--whatsapp); color: white;
}

.btn-wa:hover { background: #20a853; transform: translateY(-2px); }

.btn-copy {
  background: var(--primary); color: white;
}

.btn-copy:hover { background: var(--primary-dark); }

.btn-detail {
  background: var(--bg); color: var(--text);
  border: 2px solid var(--border); flex: 1; min-width: 150px;
}

.btn-detail:hover {
  border-color: var(--primary); color: var(--primary);
}

.gst-rate, .mode-btn {
  background: var(--bg); border: 2px solid var(--border);
  padding: 0.5rem 1rem; border-radius: 8px; cursor: pointer;
  font-weight: 600; font-size: 0.85rem; transition: all 0.2s; min-height: 40px;
}

.gst-rate.active, .mode-btn.active {
  background: var(--primary); color: white; border-color: var(--primary);
}

.number-input {
  width: 100%; padding: 0.75rem 1rem; border: 2px solid var(--border);
  border-radius: 8px; font-size: 16px; background: var(--bg-card);
  color: var(--text); transition: all 0.2s;
}

.number-input:focus {
  outline: none; border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

/* TOOLS GRID */
.section-title { text-align: center; margin-bottom: 0.5rem; }

.section-sub {
  text-align: center; color: var(--text-muted); margin-bottom: 2rem;
}

#tools { margin: 3rem 0; }

.tools-grid {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1.5rem; margin-bottom: 3rem;
}

.tools-grid.small {
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); gap: 1rem;
}

/* TOOL CARDS */
.tool-card {
  background: var(--bg-card); border: 1px solid var(--border);
  border-radius: 16px; padding: 1.5rem;
  display: flex; flex-direction: column; transition: all 0.3s;
  cursor: pointer; min-height: 240px;
  text-decoration: none; color: inherit;
}

.tool-card:hover {
  border-color: var(--primary); transform: translateY(-4px);
  box-shadow: 0 12px 24px rgba(37, 99, 235, 0.15);
}

.tool-card-top {
  display: flex; justify-content: space-between;
  align-items: start; margin-bottom: 1rem;
}

.tool-emoji { font-size: 2.5rem; }

.tool-badge, .tool-cat {
  font-size: 0.75rem; padding: 0.4rem 0.8rem;
  border-radius: 20px; font-weight: 600;
}

.tool-badge {
  background: linear-gradient(135deg, #FFF4E6, #FFE4CC); color: #D97706;
}

.tool-cat { background: var(--bg); color: var(--text-muted); }

.tool-name { margin-bottom: 0.5rem; }

.tool-desc {
  font-size: 0.9rem; color: var(--text-muted); margin-bottom: auto;
}

.tool-cta {
  color: var(--primary); font-weight: 600; font-size: 0.9rem; margin-top: 1rem;
}

#noResults {
  text-align: center; padding: 3rem; color: var(--text-muted);
}

#noResults > div { font-size: 3rem; margin-bottom: 1rem; }

/* AFFILIATE SECTION */
.affiliate-section {
  margin: 3rem 0; padding: 2rem;
  background: linear-gradient(135deg, rgba(37, 99, 235, 0.08), rgba(5, 150, 105, 0.08));
  border-radius: 16px; border: 1px solid var(--border);
}

.affiliate-label {
  text-align: center; font-size: 0.85rem;
  color: var(--text-muted); font-weight: 600;
  text-transform: uppercase; margin-bottom: 1.5rem; letter-spacing: 0.05em;
}

.affiliate-row {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 1.25rem;
}

.aff-card {
  background: var(--bg-card); border: 2px solid var(--border);
  border-radius: 14px; padding: 1.25rem;
  display: flex; align-items: center; gap: 1rem;
  transition: all 0.2s; text-decoration: none; color: inherit;
}

.aff-card:hover {
  border-color: var(--primary); transform: translateY(-2px);
  box-shadow: 0 8px 16px rgba(37, 99, 235, 0.12);
}

.aff-icon { font-size: 2rem; flex-shrink: 0; }

.aff-name { font-weight: 600; font-size: 0.95rem; }

.aff-desc { font-size: 0.8rem; color: var(--text-muted); }

.aff-cta {
  margin-left: auto; color: var(--primary);
  font-weight: 600; font-size: 0.85rem; white-space: nowrap;
}

/* EMAIL SECTION */
.email-section { margin: 3rem 0; padding: 0 1rem; }

.email-card {
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  color: white; border-radius: 16px; padding: 2.5rem;
  text-align: center; display: flex; flex-direction: column;
  align-items: center; gap: 1.5rem;
}

.email-icon { font-size: 3rem; }

.email-card h3 { color: white; margin-bottom: 0.5rem; }

.email-card p { margin: 0; opacity: 0.95; }

.email-form {
  display: flex; gap: 0.75rem; width: 100%;
  max-width: 500px; flex-wrap: wrap;
}

#emailInput {
  flex: 1; min-width: 200px; padding: 0.75rem 1.25rem;
  border: none; border-radius: 10px; font-size: 16px;
  background: rgba(255, 255, 255, 0.95); color: var(--text);
}

#emailInput:focus { outline: none; background: white; }

.email-form .btn-primary {
  background: white; color: var(--primary);
  padding: 0.75rem 1.5rem; border: none; border-radius: 10px;
  font-weight: 600; cursor: pointer; font-size: 16px; min-height: 44px;
  transition: all 0.2s;
}

.email-form .btn-primary:hover {
  transform: translateY(-2px); box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
}

.email-note {
  font-size: 0.8rem; opacity: 0.9; margin: 0;
}

/* FEATURES GRID */
.features-section { margin: 3rem 0; padding: 2rem 1rem; }

.features-grid {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 2rem; margin-top: 2rem;
}

.feature-card {
  background: var(--bg-card); border: 1px solid var(--border);
  border-radius: 16px; padding: 2rem; text-align: center;
  transition: all 0.3s;
}

.feature-card:hover {
  border-color: var(--primary); transform: translateY(-4px);
  box-shadow: 0 12px 24px rgba(37, 99, 235, 0.1);
}

.feature-icon { font-size: 2.5rem; margin-bottom: 1rem; }

.feature-card h3 { margin-bottom: 0.75rem; }

.feature-card p { font-size: 0.95rem; color: var(--text-muted); margin: 0; }

/* FAQ SECTION */
.faq-section { margin: 3rem 0; padding: 0 1rem; }

.faq-item {
  margin-bottom: 1rem; border-bottom: 1px solid var(--border);
  padding-bottom: 1rem;
}

.faq-q {
  background: none; border: none; width: 100%; text-align: left;
  padding: 1rem; font-size: 1rem; font-weight: 600; cursor: pointer;
  display: flex; justify-content: space-between; align-items: center;
  color: var(--text); transition: color 0.2s;
}

.faq-q:hover { color: var(--primary); }

.faq-q::after {
  content: '▼'; font-size: 0.75rem; transition: transform 0.3s; margin-left: 1rem;
}

.faq-q.open::after { transform: rotate(180deg); }

.faq-a {
  max-height: 0; overflow: hidden; transition: max-height 0.3s ease; padding: 0 1rem;
}

.faq-a.open { max-height: 500px; padding: 1rem; }

.faq-a > div {
  font-size: 0.95rem; color: var(--text-muted); line-height: 1.7;
}

/* FOOTER */
footer {
  background: var(--bg-card); border-top: 1px solid var(--border);
  margin-top: 4rem; padding: 3rem 1.25rem 1rem;
  color: var(--text);
}

.footer-inner {
  max-width: 1280px; margin: 0 auto;
  display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 2rem; margin-bottom: 2rem;
}

.footer-brand { grid-column: 1 / -1; }

@media (min-width: 768px) {
  .footer-brand { grid-column: span 1; }
}

.footer-brand > p { font-size: 0.9rem; color: var(--text-muted); margin: 0.75rem 0; }

.footer-social { display: flex; gap: 1rem; margin-top: 1rem; }

.footer-social a {
  display: inline-flex; width: 40px; height: 40px;
  align-items: center; justify-content: center;
  background: var(--bg); border-radius: 50%;
  font-size: 1.1rem; transition: all 0.2s;
}

.footer-social a:hover {
  background: var(--primary); color: white; text-decoration: none;
}

.footer-col h4 {
  margin-bottom: 1rem; font-size: 0.95rem; font-weight: 600;
}

.footer-col a {
  display: block; font-size: 0.85rem;
  color: var(--text-muted); margin-bottom: 0.75rem;
  transition: color 0.2s;
}

.footer-col a:hover { color: var(--primary); text-decoration: none; }

.footer-bottom {
  text-align: center; border-top: 1px solid var(--border);
  padding-top: 2rem; font-size: 0.85rem;
  color: var(--text-muted);
}

.footer-legal {
  display: flex; justify-content: center;
  gap: 2rem; margin-top: 1rem; flex-wrap: wrap;
}

.footer-legal a {
  color: var(--text-muted); text-decoration: underline;
}

/* HISTORY PANEL */
#histPanel {
  position: fixed; top: 64px; left: 0; bottom: 0;
  width: 320px; max-width: 100vw; background: var(--bg-card);
  z-index: 200; transform: translateX(-100%);
  transition: transform 0.3s; box-shadow: 4px 0 24px rgba(0, 0, 0, 0.12);
  overflow-y: auto; padding: 1.25rem;
}

#histPanel.open { transform: translateX(0); }

/* BACK TO TOP */
#backTop {
  position: fixed; bottom: 24px; right: 20px;
  background: var(--primary); color: white;
  border: none; border-radius: 50%; width: 44px; height: 44px;
  font-size: 1.1rem; cursor: pointer; display: none;
  box-shadow: 0 4px 16px rgba(37, 99, 235, 0.35); z-index: 80;
}

#backTop:hover { background: var(--primary-dark); }

/* HISTORY BUTTON */
#historyBtn {
  position: fixed; bottom: 24px; left: 20px;
  background: var(--primary); color: white;
  border: none; border-radius: 50px; padding: 11px 18px;
  font-size: 0.85rem; font-weight: 600; cursor: pointer;
  box-shadow: 0 4px 16px rgba(37, 99, 235, 0.35);
  display: flex; align-items: center; gap: 6px; z-index: 80;
}

#histBadge {
  background: white; color: var(--primary);
  border-radius: 50%; width: 20px; height: 20px;
  display: none; align-items: center; justify-content: center;
  font-size: 0.72rem; font-weight: 700; line-height: 1;
}

/* BREADCRUMB */
.breadcrumb { padding: 1rem 0; font-size: 0.9rem; color: var(--text-muted); margin-bottom: 2rem; }

.breadcrumb a { color: var(--primary); }

/* TOOL PAGE LAYOUT */
.tool-page { padding: 2rem 0; }

.tool-layout {
  display: grid; grid-template-columns: 1fr 1fr;
  gap: 3rem; margin-bottom: 3rem;
}

@media (max-width: 1024px) {
  .tool-layout { grid-template-columns: 1fr; gap: 2rem; }
}

.tool-form-col h1 { margin-bottom: 0.75rem; }

.tool-intro {
  color: var(--text-muted); margin-bottom: 2rem;
  font-size: 0.95rem; line-height: 1.7;
}

.form-group { margin-bottom: 2rem; }

.form-label {
  display: flex; justify-content: space-between;
  align-items: center; font-weight: 600;
  margin-bottom: 0.75rem; font-size: 0.95rem;
}

.form-label-hint {
  font-size: 0.8rem; color: var(--text-muted); font-weight: 400;
}

.dual-input { display: flex; gap: 1rem; }

.dual-input .range-input { flex: 2; }

.dual-input .number-input { flex: 1; min-width: 120px; }

.field-focus-hint {
  font-size: 0.8rem; color: var(--text-muted);
  margin-top: 0.5rem; padding: 0.5rem; background: var(--bg);
  border-radius: 8px;
}

/* RESULT HERO BOX */
.result-hero {
  background: linear-gradient(135deg, var(--success-bg), rgba(5, 150, 105, 0.05));
  border: 2px solid var(--success-border); border-radius: 16px;
  padding: 2rem; margin: 2rem 0;
}

.result-headline {
  font-size: 0.9rem; color: var(--text-muted);
  margin-bottom: 0.5rem; text-transform: uppercase;
  letter-spacing: 0.05em; font-weight: 600;
}

.result-main {
  font-size: clamp(2rem, 8vw, 3.5rem); font-weight: 700;
  color: var(--success-text); line-height: 1; margin-bottom: 0.75rem;
}

.result-explain {
  font-size: 0.95rem; color: var(--text-muted); margin-bottom: 1.5rem;
}

.result-breakdown {
  background: rgba(20, 83, 45, 0.05); border-radius: 10px;
  padding: 1rem; font-size: 0.9rem; margin-bottom: 1.5rem; line-height: 1.8;
}

.trust-row { display: flex; gap: 0.75rem; flex-wrap: wrap; margin-bottom: 1.5rem; }

.trust-badge {
  background: rgba(20, 83, 45, 0.1); color: var(--success-text);
  padding: 0.4rem 0.8rem; border-radius: 8px;
  font-size: 0.8rem; font-weight: 600;
}

.share-row { display: flex; gap: 0.75rem; flex-wrap: wrap; }

.btn-whatsapp, .btn-save {
  padding: 0.75rem 1.25rem; border-radius: 10px; border: none;
  font-size: 0.9rem; font-weight: 600; cursor: pointer;
  transition: all 0.2s; min-height: 44px;
  display: flex; align-items: center; justify-content: center;
  gap: 0.5rem; flex: 1; min-width: 140px;
}

.btn-whatsapp { background: var(--whatsapp); color: white; }

.btn-whatsapp:hover { background: #20a853; transform: translateY(-2px); }

.btn-save { background: var(--primary); color: white; }

.btn-save:hover { background: var(--primary-dark); }

/* CHARTS */
.chart-wrap {
  background: var(--bg-card); border: 1px solid var(--border);
  border-radius: 16px; padding: 1.5rem; margin: 2rem 0;
}

.chart-wrap h3 { margin-bottom: 1.5rem; }

canvas { max-width: 100%; height: auto; }

/* TABLES */
.table-wrap {
  background: var(--bg-card); border: 1px solid var(--border);
  border-radius: 16px; padding: 1.5rem; margin: 2rem 0;
  overflow-x: auto;
}

.table-wrap h3 { margin-bottom: 1.5rem; }

.table-scroll { overflow-x: auto; }

table {
  width: 100%; border-collapse: collapse; font-size: 0.9rem;
}

thead {
  background: var(--bg); border-bottom: 2px solid var(--border);
}

th {
  padding: 0.75rem; text-align: left;
  font-weight: 600; color: var(--text-muted);
}

td {
  padding: 0.75rem; border-bottom: 1px solid var(--border);
}

tbody tr:hover { background: var(--bg); }

/* TOOL INFO COLUMN */
.tool-info-col {
  display: flex; flex-direction: column; gap: 1.5rem;
}

.info-card {
  background: var(--bg-card); border: 1px solid var(--border);
  border-radius: 16px; padding: 1.5rem;
}

.info-card h3 { margin-bottom: 1rem; }

.info-card p { margin: 0 0 0.75rem; }

.formula-box {
  background: var(--bg); padding: 1rem; border-radius: 10px;
  font-family: 'Courier New', monospace; font-size: 1rem;
  margin-bottom: 1rem; overflow-x: auto;
}

.formula-vars { font-size: 0.9rem; line-height: 1.8; }

.formula-vars div { margin-bottom: 0.5rem; }

.example-calc {
  background: var(--bg); padding: 1rem; border-radius: 10px;
  font-family: 'Courier New', monospace; font-size: 0.85rem; line-height: 1.8;
}

.tip-list { margin: 0; padding-left: 1.5rem; }

.tip-list li { margin-bottom: 0.75rem; color: var(--text-muted); }

/* AFFILIATE WIDGET */
.aff-widget {
  background: linear-gradient(135deg, rgba(37, 99, 235, 0.08), rgba(5, 150, 105, 0.08));
  border: 1px solid var(--border); border-radius: 16px;
  padding: 1.5rem;
}

.aff-widget-title { font-weight: 600; margin-bottom: 1rem; font-size: 0.95rem; }

.aff-widget-list { display: flex; flex-direction: column; gap: 0.75rem; }

.aff-w-item {
  background: var(--bg-card); border: 1px solid var(--border);
  padding: 0.75rem 1rem; border-radius: 10px; font-size: 0.9rem;
  color: var(--text); text-decoration: none; transition: all 0.2s;
  display: block;
}

.aff-w-item:hover { border-color: var(--primary); background: var(--bg); }

/* TOOL ARTICLE */
.tool-article {
  background: var(--bg-card); border: 1px solid var(--border);
  border-radius: 16px; padding: 2rem; margin: 3rem 0; max-width: 900px;
}

.tool-article h2 { margin-bottom: 1.5rem; }

.tool-article p { margin-bottom: 1rem; line-height: 1.8; }

.tool-article ul, .tool-article ol { margin-bottom: 1.5rem; }

/* RELATED TOOLS */
.related-tools { margin: 3rem 0; }

.related-tools h2 { margin-bottom: 1.5rem; }

/* AD SLOTS */
.ad-slot {
  min-height: 90px; display: flex; align-items: center;
  justify-content: center; background: var(--bg);
  border: 2px dashed var(--border); border-radius: 12px;
  margin: 2rem 0; font-size: 0.85rem; color: var(--text-muted); contain: layout;
}

.ad-300 { display: flex; align-items: center; justify-content: center; }

/* PERSONALIZE */
.personalize-row { margin: 2rem 0; }

#userName {
  width: 100%; padding: 0.75rem 1rem; border: 2px solid var(--border);
  border-radius: 10px; font-size: 16px; background: var(--bg-card);
  color: var(--text);
}

#userName:focus { outline: none; border-color: var(--primary); }

/* PRINT STYLES */
@media print {
  header, footer, .mobile-nav, .affiliate-section,
  .email-section, .ad-slot, #historyBtn, #backTop, #cn-toast {
    display: none;
  }
  body { background: white; color: black; }
  .result-hero { border: 1px solid #000; box-shadow: none; }
}

/* RESPONSIVE */
@media (max-width: 768px) {
  main { padding: 0 1rem; }
  .quick-calc-section { padding: 1.5rem 1rem; }
  .quick-calc-tabs {
    overflow-x: auto; flex-wrap: nowrap;
    -webkit-overflow-scrolling: touch;
  }
  .qc-input-row { grid-template-columns: 1fr; gap: 1rem; }
  .affiliate-row { grid-template-columns: 1fr; }
  .email-form { flex-direction: column; }
  .email-form input, .email-form button { width: 100%; }
  .footer-inner { grid-template-columns: 1fr; }
  .footer-brand { grid-column: span 1; }
  .share-row { flex-direction: column; }
  .share-row button, .share-row a { width: 100%; }
}

@media (max-width: 480px) {
  body { font-size: 15px; }
  h1 { font-size: 1.5rem; }
  h2 { font-size: 1.2rem; }
  .hero { padding: 1rem 0.5rem; }
  .tools-grid { grid-template-columns: 1fr; gap: 1rem; }
  .tool-emoji { font-size: 2rem; }
  .qc-result-main { font-size: 2rem; }
  .result-main { font-size: 1.75rem; }
}