/* ── ConserveMode™ Design System ───────────────────────────────────────────
   Aesthetic: Industrial-precision meets clean energy. Dark command-center
   feel with sharp green data accents. Like a real-time power dashboard.
   Fonts: Syne (display) + DM Sans (body)
──────────────────────────────────────────────────────────────────────────── */

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

:root {
  --green:       #00d084;
  --green-dim:   #00a868;
  --green-glow:  rgba(0,208,132,0.15);
  --green-line:  rgba(0,208,132,0.3);
  --dark:        #060d0a;
  --dark2:       #0c1810;
  --dark3:       #111f16;
  --dark4:       #162b1e;
  --mid:         #1e3d2a;
  --border:      rgba(0,208,132,0.18);
  --text:        #e8f5ee;
  --text-dim:    #8ab49a;
  --text-muted:  #4a7060;
  --white:       #ffffff;
  --gold:        #f0c060;
  --radius:      8px;
  --radius-lg:   16px;
  --transition:  0.25s cubic-bezier(0.4,0,0.2,1);
  --shadow:      0 4px 24px rgba(0,0,0,0.4);
  --glow:        0 0 40px rgba(0,208,132,0.12);
}

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

html { scroll-behavior: smooth; }

body {
  font-family: 'DM Sans', sans-serif;
  background: var(--dark);
  color: var(--text);
  font-size: 16px;
  line-height: 1.7;
  overflow-x: hidden;
}

/* ── Typography ────────────────────────────────────────────────── */
h1, h2, h3, h4, h5 {
  font-family: 'Syne', sans-serif;
  line-height: 1.15;
  color: var(--white);
}
h1 { font-size: clamp(2.4rem, 5vw, 4rem); font-weight: 800; }
h2 { font-size: clamp(1.8rem, 3.5vw, 2.8rem); font-weight: 700; }
h3 { font-size: clamp(1.3rem, 2.5vw, 1.8rem); font-weight: 600; }
h4 { font-size: 1.1rem; font-weight: 600; }
p  { color: var(--text-dim); line-height: 1.8; }
a  { color: var(--green); text-decoration: none; transition: var(--transition); }
a:hover { color: var(--white); }

.accent   { color: var(--green); }
.gold     { color: var(--gold); }
.muted    { color: var(--text-muted); font-size: 0.9rem; }
.lead     { font-size: 1.15rem; color: var(--text); max-width: 640px; line-height: 1.8; }

/* ── Layout ────────────────────────────────────────────────────── */
.container { max-width: 1180px; margin: 0 auto; padding: 0 28px; }
.section   { padding: 96px 0; }
.section-sm { padding: 60px 0; }

.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 48px; align-items: start; }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 32px; }
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }

@media (max-width: 900px) {
  .grid-2, .grid-3 { grid-template-columns: 1fr; }
  .grid-4 { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 580px) {
  .grid-4 { grid-template-columns: 1fr; }
  .section { padding: 64px 0; }
}

/* ── Nav ───────────────────────────────────────────────────────── */
.nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  padding: 0 28px;
  background: rgba(6,13,10,0.92);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border);
  height: 68px;
  display: flex; align-items: center; justify-content: space-between;
}
.nav-logo {
  font-family: 'Syne', sans-serif;
  font-size: 1.25rem; font-weight: 800;
  color: var(--white); letter-spacing: -0.02em;
}
.nav-logo span { color: var(--green); }
.nav-links { display: flex; align-items: center; gap: 8px; }
.nav-links a {
  font-size: 0.875rem; font-weight: 500; color: var(--text-dim);
  padding: 6px 14px; border-radius: 6px;
  transition: var(--transition);
}
.nav-links a:hover { color: var(--white); background: var(--dark3); }
.nav-links a.active { color: var(--green); }
.nav-cta {
  background: var(--green); color: var(--dark) !important;
  font-weight: 600 !important; padding: 8px 20px !important;
  border-radius: 6px !important;
}
.nav-cta:hover { background: #00f09a !important; color: var(--dark) !important; }
.nav-hamburger { display: none; flex-direction: column; gap: 5px; cursor: pointer; padding: 4px; }
.nav-hamburger span { width: 22px; height: 2px; background: var(--text); border-radius: 2px; transition: var(--transition); }

@media (max-width: 820px) {
  .nav-links { display: none; flex-direction: column; position: absolute;
    top: 68px; left: 0; right: 0; background: var(--dark2);
    border-bottom: 1px solid var(--border); padding: 16px 28px; gap: 4px; }
  .nav-links.open { display: flex; }
  .nav-hamburger { display: flex; }
}

/* ── Buttons ───────────────────────────────────────────────────── */
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 13px 28px; border-radius: var(--radius);
  font-family: 'DM Sans', sans-serif; font-size: 0.95rem; font-weight: 600;
  cursor: pointer; border: none; transition: var(--transition); text-decoration: none;
}
.btn-primary { background: var(--green); color: var(--dark); }
.btn-primary:hover { background: #00f09a; color: var(--dark); transform: translateY(-1px); box-shadow: 0 8px 24px rgba(0,208,132,0.3); }
.btn-outline { background: transparent; color: var(--green); border: 1.5px solid var(--green-line); }
.btn-outline:hover { background: var(--green-glow); color: var(--white); border-color: var(--green); }
.btn-ghost  { background: var(--dark3); color: var(--text); }
.btn-ghost:hover { background: var(--dark4); color: var(--white); }
.btn-lg { padding: 16px 36px; font-size: 1rem; }

/* ── Cards ─────────────────────────────────────────────────────── */
.card {
  background: var(--dark2);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 32px;
  transition: var(--transition);
}
.card:hover { border-color: rgba(0,208,132,0.4); box-shadow: var(--glow); }
.card-icon { font-size: 2rem; margin-bottom: 16px; }

/* ── Layer Savings Table ───────────────────────────────────────── */
.savings-table { width: 100%; border-collapse: collapse; margin: 24px 0; }
.savings-table th {
  background: var(--mid); color: var(--green);
  font-family: 'Syne', sans-serif; font-size: 0.8rem; font-weight: 700;
  text-transform: uppercase; letter-spacing: 0.08em;
  padding: 14px 16px; text-align: left; border: 1px solid var(--border);
}
.savings-table td {
  padding: 14px 16px; border: 1px solid var(--border);
  font-size: 0.925rem; color: var(--text-dim); vertical-align: top;
}
.savings-table tr:nth-child(even) td { background: rgba(255,255,255,0.02); }
.savings-table tr:hover td { background: var(--green-glow); }
.savings-pct { font-family: 'Syne', sans-serif; font-size: 1.4rem; font-weight: 800; color: var(--green); white-space: nowrap; }
.savings-label { font-weight: 600; color: var(--text); }

/* ── Hero elements ─────────────────────────────────────────────── */
.hero { padding: 160px 0 96px; position: relative; overflow: hidden; }
.hero::before {
  content: '';
  position: absolute; top: 0; left: 0; right: 0; bottom: 0;
  background: radial-gradient(ellipse 80% 60% at 50% 0%, rgba(0,208,132,0.08) 0%, transparent 70%);
  pointer-events: none;
}
.hero-grid {
  position: absolute; inset: 0;
  background-image: linear-gradient(var(--border) 1px, transparent 1px),
                    linear-gradient(90deg, var(--border) 1px, transparent 1px);
  background-size: 60px 60px;
  mask-image: radial-gradient(ellipse 70% 50% at 50% 0%, black 0%, transparent 80%);
  opacity: 0.4;
}
.hero-eyebrow {
  display: inline-flex; align-items: center; gap: 8px;
  background: var(--green-glow); border: 1px solid var(--green-line);
  color: var(--green); font-size: 0.8rem; font-weight: 600;
  letter-spacing: 0.1em; text-transform: uppercase;
  padding: 6px 16px; border-radius: 100px; margin-bottom: 24px;
}
.hero-eyebrow::before { content: '●'; font-size: 0.5rem; animation: pulse 2s infinite; }
@keyframes pulse { 0%,100%{opacity:1} 50%{opacity:0.3} }

.stat-row { display: flex; gap: 48px; margin-top: 48px; flex-wrap: wrap; }
.stat-item { }
.stat-num { font-family: 'Syne', sans-serif; font-size: 2.5rem; font-weight: 800; color: var(--green); line-height: 1; }
.stat-label { font-size: 0.85rem; color: var(--text-muted); margin-top: 4px; }

/* ── Section labels ────────────────────────────────────────────── */
.section-label {
  display: inline-block;
  font-size: 0.75rem; font-weight: 700; letter-spacing: 0.12em;
  text-transform: uppercase; color: var(--green);
  margin-bottom: 12px;
}
.section-title { margin-bottom: 16px; }
.section-subtitle { color: var(--text-dim); max-width: 600px; margin-bottom: 48px; font-size: 1.05rem; }

/* ── Layer badges ──────────────────────────────────────────────── */
.layer-card {
  background: var(--dark2); border: 1px solid var(--border);
  border-radius: var(--radius-lg); padding: 32px; position: relative; overflow: hidden;
}
.layer-card::after {
  content: ''; position: absolute; top: 0; left: 0; right: 0; height: 3px;
  background: var(--green);
}
.layer-num {
  font-family: 'Syne', sans-serif; font-size: 0.7rem; font-weight: 700;
  letter-spacing: 0.15em; text-transform: uppercase;
  color: var(--green); margin-bottom: 8px;
}
.layer-pct {
  font-family: 'Syne', sans-serif; font-size: 3.5rem; font-weight: 800;
  color: var(--green); line-height: 1; margin-bottom: 8px;
}
.layer-title { font-family: 'Syne', sans-serif; font-size: 1rem; font-weight: 700; color: var(--white); margin-bottom: 12px; }
.layer-desc { font-size: 0.9rem; color: var(--text-dim); line-height: 1.7; }
.layer-measure { margin-top: 20px; padding-top: 16px; border-top: 1px solid var(--border);
  font-size: 0.8rem; color: var(--text-muted); font-family: 'DM Sans', monospace; }

/* ── Formula table ─────────────────────────────────────────────── */
.formula-table { width: 100%; border-collapse: collapse; font-size: 0.9rem; }
.formula-table th {
  background: var(--mid); color: var(--green);
  font-family: 'Syne', sans-serif; font-size: 0.75rem; font-weight: 700;
  letter-spacing: 0.08em; text-transform: uppercase;
  padding: 12px 14px; border: 1px solid var(--border); text-align: left;
}
.formula-table td { padding: 11px 14px; border: 1px solid var(--border); color: var(--text-dim); }
.formula-table tr:nth-child(even) td { background: rgba(255,255,255,0.02); }
.formula-table .hit td { color: var(--green); font-weight: 500; }
.formula-table .total th, .formula-table .total td {
  background: var(--mid); color: var(--white); font-weight: 700;
}
.formula-table .zero { color: var(--green) !important; font-weight: 700; }

/* ── Callout boxes ─────────────────────────────────────────────── */
.callout {
  background: var(--green-glow); border: 1px solid var(--green-line);
  border-left: 4px solid var(--green);
  border-radius: var(--radius); padding: 20px 24px; margin: 24px 0;
}
.callout p { color: var(--text); }
.callout-gold {
  background: rgba(240,192,96,0.08); border-color: rgba(240,192,96,0.3);
  border-left-color: var(--gold);
}
.callout-gold p { color: var(--text); }

/* ── Page header (inner pages) ─────────────────────────────────── */
.page-header {
  padding: 140px 0 64px;
  background: radial-gradient(ellipse 60% 80% at 50% -10%, rgba(0,208,132,0.1) 0%, transparent 70%);
  border-bottom: 1px solid var(--border);
}

/* ── Footer ────────────────────────────────────────────────────── */
footer {
  background: var(--dark2);
  border-top: 1px solid var(--border);
  padding: 64px 0 32px;
}
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 48px; margin-bottom: 48px; }
.footer-brand .nav-logo { font-size: 1.4rem; display: block; margin-bottom: 12px; }
.footer-brand p { font-size: 0.875rem; color: var(--text-muted); max-width: 260px; }
.footer-col h5 { font-family: 'Syne', sans-serif; font-size: 0.8rem; font-weight: 700;
  letter-spacing: 0.1em; text-transform: uppercase; color: var(--text-muted); margin-bottom: 16px; }
.footer-col a { display: block; font-size: 0.875rem; color: var(--text-muted); margin-bottom: 10px; }
.footer-col a:hover { color: var(--green); }
.footer-legal {
  border-top: 1px solid var(--border); padding-top: 24px;
  display: flex; justify-content: center; flex-direction: column; align-items: center; gap: 6px;
}
.footer-legal p { font-size: 0.8rem; color: var(--text-muted); text-align: center; }
.footer-badges { display: flex; gap: 12px; margin-top: 8px; }
.badge {
  display: inline-flex; align-items: center; gap: 6px;
  background: var(--dark3); border: 1px solid var(--border);
  border-radius: 100px; padding: 4px 12px;
  font-size: 0.75rem; color: var(--text-dim); font-weight: 500;
}

@media (max-width: 820px) {
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .stat-row { gap: 28px; }
}
@media (max-width: 580px) {
  .footer-grid { grid-template-columns: 1fr; }
  .hero { padding: 130px 0 72px; }
}

/* ── Misc utilities ────────────────────────────────────────────── */
.text-center { text-align: center; }
.text-center .section-subtitle { margin-left: auto; margin-right: auto; }
.mt-8  { margin-top: 8px; }
.mt-16 { margin-top: 16px; }
.mt-24 { margin-top: 24px; }
.mt-48 { margin-top: 48px; }
.mb-48 { margin-bottom: 48px; }
.divider { height: 1px; background: var(--border); margin: 48px 0; }
.tag { display: inline-block; background: var(--green-glow); border: 1px solid var(--green-line);
  color: var(--green); font-size: 0.75rem; font-weight: 600; letter-spacing: 0.06em;
  padding: 3px 10px; border-radius: 4px; text-transform: uppercase; }

/* ── Animations ────────────────────────────────────────────────── */
@keyframes fadeUp { from { opacity:0; transform:translateY(24px); } to { opacity:1; transform:translateY(0); } }
.fade-up { animation: fadeUp 0.6s ease both; }
.fade-up-1 { animation-delay: 0.1s; }
.fade-up-2 { animation-delay: 0.2s; }
.fade-up-3 { animation-delay: 0.3s; }
.fade-up-4 { animation-delay: 0.4s; }