@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800;900&display=swap');

/* Lucide icon sizing */
.calc-card-icon svg { width: 24px; height: 24px; stroke: var(--orange); stroke-width: 1.75; }
.nav-brand-icon svg { width: 18px; height: 18px; stroke: #000; stroke-width: 2.5; }
.step-icon {
  width: 38px; height: 38px;
  background: var(--orange); color: #000;
  border-radius: 50%;
  display: inline-flex; align-items: center; justify-content: center;
  font-size: 1rem; font-weight: 900; margin-bottom: 0.75rem;
}

:root {
  --bg: #080A0F;
  --surface: #0F1219;
  --card: #141820;
  --card-hover: #1A1F2E;
  --border: rgba(255,255,255,0.07);
  --border-hover: rgba(249,115,22,0.35);
  --orange: #F97316;
  --orange-light: #FB923C;
  --orange-dim: rgba(249,115,22,0.12);
  --orange-glow: rgba(249,115,22,0.25);
  --text: #F1F5F9;
  --text-muted: #64748B;
  --text-dim: #94A3B8;
  --success: #22C55E;
  --success-dim: rgba(34,197,94,0.1);
  --radius: 14px;
  --radius-sm: 8px;
  --shadow: 0 4px 24px rgba(0,0,0,0.4);
  --shadow-orange: 0 0 40px rgba(249,115,22,0.15);
}

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

html { scroll-behavior: smooth; }

body {
  font-family: 'Inter', system-ui, sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

/* ── NAV ─────────────────────────────────────── */
.nav {
  position: sticky; top: 0; z-index: 100;
  background: rgba(8,10,15,0.85);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
  padding: 0 2rem;
  height: 64px;
  display: flex; align-items: center; justify-content: space-between;
}
.nav-brand {
  display: flex; align-items: center; gap: 10px;
  text-decoration: none; color: var(--text);
  font-size: 1.1rem; font-weight: 800; letter-spacing: -0.02em;
}
.nav-brand-icon {
  width: 34px; height: 34px;
  background: var(--orange);
  border-radius: 8px;
  display: flex; align-items: center; justify-content: center;
  font-size: 18px;
}
.nav-brand span { color: var(--orange); }
.nav-links { display: flex; align-items: center; gap: 1.5rem; }
.nav-links a {
  color: var(--text-dim); text-decoration: none;
  font-size: 0.875rem; font-weight: 500;
  transition: color 0.2s;
}
.nav-links a:hover { color: var(--text); }
.nav-cta {
  background: var(--orange) !important;
  color: #000 !important; font-weight: 700 !important;
  padding: 0.4rem 1rem !important;
  border-radius: var(--radius-sm) !important;
  transition: opacity 0.2s !important;
}
.nav-cta:hover { opacity: 0.85 !important; }

/* ── HERO ────────────────────────────────────── */
.hero {
  text-align: center;
  padding: 5rem 2rem 4rem;
  max-width: 860px; margin: 0 auto;
  position: relative;
}
.hero-badge {
  display: inline-flex; align-items: center; gap: 6px;
  background: var(--orange-dim);
  border: 1px solid var(--border-hover);
  color: var(--orange-light);
  font-size: 0.78rem; font-weight: 600; letter-spacing: 0.05em;
  padding: 0.3rem 0.9rem; border-radius: 999px;
  margin-bottom: 1.5rem; text-transform: uppercase;
}
.hero h1 {
  font-size: clamp(2.2rem, 5vw, 3.6rem);
  font-weight: 900; letter-spacing: -0.03em;
  line-height: 1.1; margin-bottom: 1.25rem;
}
.hero h1 em { font-style: normal; color: var(--orange); }
.hero p {
  font-size: 1.1rem; color: var(--text-dim);
  max-width: 580px; margin: 0 auto 2.5rem;
}
.hero-stats {
  display: flex; justify-content: center; gap: 3rem;
  flex-wrap: wrap;
}
.hero-stat { text-align: center; }
.hero-stat-num {
  font-size: 1.8rem; font-weight: 800;
  color: var(--orange); letter-spacing: -0.03em;
}
.hero-stat-label { font-size: 0.8rem; color: var(--text-muted); margin-top: 2px; }

/* ── SECTION ─────────────────────────────────── */
.section { padding: 3rem 2rem; max-width: 1200px; margin: 0 auto; }
.section-header { margin-bottom: 2rem; }
.section-header h2 {
  font-size: 1.5rem; font-weight: 800;
  letter-spacing: -0.02em; margin-bottom: 0.4rem;
}
.section-header p { color: var(--text-muted); font-size: 0.9rem; }

/* ── CALCULATOR GRID ─────────────────────────── */
.calc-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1rem;
}
.calc-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem;
  text-decoration: none; color: var(--text);
  transition: all 0.25s;
  position: relative; overflow: hidden;
  cursor: pointer;
}
.calc-card::before {
  content: '';
  position: absolute; top: 0; left: 0; right: 0; height: 2px;
  background: linear-gradient(90deg, var(--orange), transparent);
  opacity: 0; transition: opacity 0.25s;
}
.calc-card:hover {
  background: var(--card-hover);
  border-color: var(--border-hover);
  transform: translateY(-3px);
  box-shadow: var(--shadow), var(--shadow-orange);
}
.calc-card:hover::before { opacity: 1; }

.calc-card-icon {
  width: 48px; height: 48px;
  background: var(--orange-dim);
  border-radius: 12px;
  display: flex; align-items: center; justify-content: center;
  font-size: 22px; margin-bottom: 1rem;
  transition: background 0.25s;
}
.calc-card:hover .calc-card-icon { background: var(--orange-glow); }

.calc-card h3 {
  font-size: 1rem; font-weight: 700; margin-bottom: 0.4rem;
}
.calc-card p {
  font-size: 0.83rem; color: var(--text-muted); line-height: 1.5;
  margin-bottom: 1rem;
}
.calc-card-tag {
  display: inline-block;
  background: rgba(255,255,255,0.05);
  color: var(--text-muted);
  font-size: 0.72rem; font-weight: 600;
  padding: 0.2rem 0.6rem; border-radius: 999px;
  text-transform: uppercase; letter-spacing: 0.04em;
  margin-right: 0.3rem; margin-bottom: 0.3rem;
}
.calc-card-arrow {
  position: absolute; bottom: 1.5rem; right: 1.5rem;
  color: var(--orange); font-size: 1rem;
  opacity: 0; transform: translateX(-6px);
  transition: all 0.25s;
}
.calc-card:hover .calc-card-arrow { opacity: 1; transform: translateX(0); }

/* ── CALCULATOR PAGE LAYOUT ──────────────────── */
.calc-page {
  max-width: 1100px; margin: 0 auto;
  padding: 2rem;
}
.calc-page-header {
  margin-bottom: 2rem;
}
.back-link {
  display: inline-flex; align-items: center; gap: 6px;
  color: var(--text-muted); text-decoration: none;
  font-size: 0.85rem; font-weight: 500;
  transition: color 0.2s; margin-bottom: 1.5rem;
}
.back-link:hover { color: var(--orange); }
.calc-page-header h1 {
  font-size: clamp(1.6rem, 3vw, 2.4rem);
  font-weight: 900; letter-spacing: -0.03em;
  margin-bottom: 0.5rem;
}
.calc-page-header p { color: var(--text-dim); font-size: 0.95rem; }

.calc-workspace {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
  align-items: start;
}
@media (max-width: 768px) {
  .calc-workspace { grid-template-columns: 1fr; }
}

/* ── INPUTS PANEL ────────────────────────────── */
.panel {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.75rem;
}
.panel-title {
  font-size: 0.8rem; font-weight: 700;
  text-transform: uppercase; letter-spacing: 0.07em;
  color: var(--text-muted); margin-bottom: 1.5rem;
  display: flex; align-items: center; gap: 8px;
}
.panel-title::after {
  content: ''; flex: 1; height: 1px; background: var(--border);
}

.field { margin-bottom: 1.25rem; }
.field label {
  display: block; font-size: 0.83rem; font-weight: 600;
  color: var(--text-dim); margin-bottom: 0.5rem;
}
.field-hint {
  font-size: 0.75rem; color: var(--text-muted);
  margin-top: 0.3rem;
}

.input-wrap { position: relative; display: flex; align-items: center; }
.input-wrap input,
.input-wrap select {
  width: 100%;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text);
  font-family: inherit; font-size: 0.95rem; font-weight: 500;
  padding: 0.65rem 0.9rem;
  transition: border-color 0.2s, box-shadow 0.2s;
  outline: none;
  appearance: none;
}
.input-wrap input:focus,
.input-wrap select:focus {
  border-color: var(--orange);
  box-shadow: 0 0 0 3px var(--orange-dim);
}
.input-unit {
  position: absolute; right: 0.9rem;
  font-size: 0.78rem; color: var(--text-muted);
  font-weight: 600; pointer-events: none;
}
.input-wrap input:has(+ .input-unit) { padding-right: 2.5rem; }

.toggle-group {
  display: flex; gap: 0.5rem;
}
.toggle-btn {
  flex: 1; padding: 0.55rem 0;
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius-sm); color: var(--text-muted);
  font-family: inherit; font-size: 0.83rem; font-weight: 600;
  cursor: pointer; transition: all 0.2s;
}
.toggle-btn.active {
  background: var(--orange-dim); border-color: var(--orange);
  color: var(--orange);
}

/* ── RESULTS PANEL ───────────────────────────── */
.results-panel {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.75rem;
  position: sticky; top: 80px;
}
.result-item {
  padding: 1rem 1.1rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  margin-bottom: 0.75rem;
  transition: border-color 0.3s;
}
.result-item.highlight {
  border-color: var(--orange);
  background: var(--orange-dim);
}
.result-label {
  font-size: 0.75rem; color: var(--text-muted);
  font-weight: 600; text-transform: uppercase;
  letter-spacing: 0.05em; margin-bottom: 0.3rem;
}
.result-value {
  font-size: 1.7rem; font-weight: 800;
  letter-spacing: -0.03em; color: var(--text);
  line-height: 1;
}
.result-item.highlight .result-value { color: var(--orange); }
.result-sub {
  font-size: 0.78rem; color: var(--text-muted); margin-top: 0.2rem;
}

.result-divider {
  height: 1px; background: var(--border);
  margin: 1rem 0;
}

/* PDF / CTA Button */
.btn {
  display: flex; align-items: center; justify-content: center;
  gap: 8px; width: 100%; padding: 0.85rem 1.5rem;
  border: none; border-radius: var(--radius-sm);
  font-family: inherit; font-size: 0.9rem; font-weight: 700;
  cursor: pointer; transition: all 0.2s; text-decoration: none;
}
.btn-primary {
  background: var(--orange); color: #000;
}
.btn-primary:hover {
  background: var(--orange-light);
  box-shadow: 0 4px 20px var(--orange-glow);
  transform: translateY(-1px);
}
.btn-ghost {
  background: var(--surface); color: var(--text-dim);
  border: 1px solid var(--border);
  margin-top: 0.75rem;
}
.btn-ghost:hover {
  border-color: var(--border-hover); color: var(--text);
}

/* ── WASTE TOGGLE ────────────────────────────── */
.waste-notice {
  background: var(--success-dim);
  border: 1px solid rgba(34,197,94,0.2);
  border-radius: var(--radius-sm);
  padding: 0.6rem 0.9rem;
  font-size: 0.8rem; color: var(--success);
  margin-bottom: 1rem;
  display: none;
}
.waste-notice.show { display: block; }

/* ── SEO CONTENT BLOCK ───────────────────────── */
.seo-block {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 2.5rem;
  margin-top: 2rem;
}
.seo-block h2 {
  font-size: 1.3rem; font-weight: 800;
  letter-spacing: -0.02em; margin-bottom: 1rem;
}
.seo-block h3 {
  font-size: 1rem; font-weight: 700;
  margin: 1.5rem 0 0.5rem; color: var(--text);
}
.seo-block p {
  color: var(--text-dim); font-size: 0.9rem;
  line-height: 1.7; margin-bottom: 0.75rem;
}
.seo-block ul {
  list-style: none; padding: 0;
}
.seo-block ul li {
  padding: 0.4rem 0; color: var(--text-dim);
  font-size: 0.9rem; padding-left: 1.2rem; position: relative;
}
.seo-block ul li::before {
  content: '→'; position: absolute; left: 0;
  color: var(--orange); font-size: 0.8rem;
}

/* ── ECOSYSTEM CTA ───────────────────────────── */
.ecosystem-strip {
  background: linear-gradient(135deg, var(--orange-dim), rgba(249,115,22,0.05));
  border: 1px solid var(--border-hover);
  border-radius: var(--radius);
  padding: 2rem;
  margin-top: 2rem;
  display: flex; align-items: center; justify-content: space-between;
  gap: 1.5rem; flex-wrap: wrap;
}
.ecosystem-strip h3 {
  font-size: 1.1rem; font-weight: 800;
  margin-bottom: 0.4rem;
}
.ecosystem-strip p {
  color: var(--text-muted); font-size: 0.85rem;
}
.ecosystem-links {
  display: flex; gap: 0.75rem; flex-wrap: wrap;
}
.eco-link {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 0.5rem 1rem;
  font-size: 0.8rem; font-weight: 700;
  color: var(--text-dim); text-decoration: none;
  transition: all 0.2s;
}
.eco-link:hover {
  border-color: var(--orange); color: var(--orange);
}

/* ── FOOTER ──────────────────────────────────── */
.footer {
  border-top: 1px solid var(--border);
  padding: 3rem 2rem;
  margin-top: 4rem;
}
.footer-inner {
  max-width: 1200px; margin: 0 auto;
  display: flex; justify-content: space-between;
  align-items: center; gap: 1rem; flex-wrap: wrap;
}
.footer-brand {
  font-size: 1rem; font-weight: 800;
  letter-spacing: -0.02em;
}
.footer-brand span { color: var(--orange); }
.footer-copy {
  font-size: 0.8rem; color: var(--text-muted);
}
.footer-links {
  display: flex; gap: 1.5rem;
}
.footer-links a {
  color: var(--text-muted); text-decoration: none;
  font-size: 0.8rem; transition: color 0.2s;
}
.footer-links a:hover { color: var(--orange); }

/* ── UTILS ───────────────────────────────────── */
.divider {
  height: 1px; background: var(--border);
  margin: 3rem 0;
}
.tag-row { display: flex; flex-wrap: wrap; gap: 0.5rem; margin-top: 0.75rem; }
.tag {
  background: var(--orange-dim); color: var(--orange-light);
  font-size: 0.72rem; font-weight: 700;
  padding: 0.2rem 0.7rem; border-radius: 999px;
  text-transform: uppercase; letter-spacing: 0.05em;
}
.tag-gray {
  background: rgba(255,255,255,0.05); color: var(--text-muted);
}

/* ── ANIMATIONS ──────────────────────────────── */
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(16px); }
  to   { opacity: 1; transform: translateY(0); }
}
.fade-up { animation: fadeUp 0.5s ease both; }
.delay-1 { animation-delay: 0.1s; }
.delay-2 { animation-delay: 0.2s; }
.delay-3 { animation-delay: 0.3s; }

/* Number pulse on change */
@keyframes pulse-orange {
  0%   { color: var(--orange); }
  100% { color: var(--text); }
}
.result-value.updated {
  animation: pulse-orange 0.6s ease;
}

/* ── RESPONSIVE ──────────────────────────────── */
@media (max-width: 640px) {
  .nav-links { display: none; }
  .hero { padding: 3rem 1.25rem 2.5rem; }
  .section { padding: 2rem 1.25rem; }
  .ecosystem-strip { flex-direction: column; align-items: flex-start; }
  .footer-inner { flex-direction: column; text-align: center; }
}

/* ── LABOR SECTION ───────────────────────────── */
.labor-section {
  margin-top: 1.5rem;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 2rem;
}
.labor-section-header { margin-bottom: 1.75rem; }
.labor-section-header h2 {
  font-size: 1.15rem; font-weight: 800;
  letter-spacing: -0.02em; margin-bottom: 0.4rem;
  display: flex; align-items: center; gap: 10px;
}
.optional-badge {
  font-size: 0.68rem; font-weight: 700;
  background: var(--orange-dim); color: var(--orange);
  border: 1px solid var(--border-hover);
  padding: 0.15rem 0.55rem; border-radius: 999px;
  text-transform: uppercase; letter-spacing: 0.06em;
}
.labor-section-header p { color: var(--text-muted); font-size: 0.875rem; }
.labor-workspace {
  display: grid; grid-template-columns: 1fr 1fr; gap: 1.25rem;
}
@media (max-width: 768px) { .labor-workspace { grid-template-columns: 1fr; } }
.labor-context {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 0.6rem 0.9rem;
  font-size: 0.8rem; color: var(--text-muted);
  margin-top: 1rem;
}
.labor-context strong { color: var(--orange); }
.summary-line {
  display: flex; justify-content: space-between; align-items: center;
  padding: 0.75rem 0; font-size: 0.9rem; color: var(--text-dim);
  border-bottom: 1px solid var(--border);
}
.summary-line:last-of-type { border-bottom: none; }
.summary-line span:last-child { font-weight: 700; color: var(--text); }
.summary-total {
  display: flex; justify-content: space-between; align-items: center;
  padding: 1rem 0; margin-top: 0.25rem;
  border-top: 2px solid var(--orange);
}
.summary-total .total-label {
  font-size: 0.8rem; font-weight: 700; letter-spacing: 0.06em;
  text-transform: uppercase; color: var(--text-muted);
}
.summary-total .total-value {
  font-size: 1.8rem; font-weight: 900;
  color: var(--orange); letter-spacing: -0.03em;
}
.summary-divider { height: 1px; background: var(--border); margin: 0.25rem 0; }