/* ============================================================
   OptivAI — style.css
   Brand: Deep Navy #0A0F1E | Electric Cyan #00D4FF
   Fonts: Work Sans (display) | Inter (body)
   ============================================================ */

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

/* ── Design Tokens ── */
:root {
  /* Brand Colors */
  --navy:        #0A0F1E;
  --navy-mid:    #111827;
  --navy-light:  #1E2A3A;
  --cyan:        #00D4FF;
  --cyan-dim:    #00A8CC;
  --cyan-glow:   rgba(0, 212, 255, 0.12);
  --cyan-glow-lg: rgba(0, 212, 255, 0.06);
  --white:       #FFFFFF;
  --off-white:   #F0F4FF;
  --slate:       #8892A4;
  --slate-light: #B8C2D4;
  --green:       #10B981;
  --green-dim:   #0D9668;
  --border:      #1E2A3A;
  --border-light: rgba(255,255,255,0.08);

  /* Type Scale */
  --text-xs:   clamp(0.75rem,  0.7rem  + 0.25vw, 0.875rem);
  --text-sm:   clamp(0.875rem, 0.8rem  + 0.35vw, 1rem);
  --text-base: clamp(1rem,     0.95rem + 0.25vw, 1.125rem);
  --text-lg:   clamp(1.125rem, 1rem    + 0.75vw, 1.5rem);
  --text-xl:   clamp(1.5rem,   1.2rem  + 1.25vw, 2.25rem);
  --text-2xl:  clamp(2rem,     1.2rem  + 2.5vw,  3.5rem);
  --text-hero: clamp(2.75rem,  1rem    + 6vw,    6rem);

  /* Spacing */
  --space-1: 0.25rem; --space-2: 0.5rem; --space-3: 0.75rem;
  --space-4: 1rem;    --space-5: 1.25rem; --space-6: 1.5rem;
  --space-8: 2rem;    --space-10: 2.5rem; --space-12: 3rem;
  --space-16: 4rem;   --space-20: 5rem;   --space-24: 6rem;
  --space-32: 8rem;

  /* Layout */
  --content-narrow: 640px;
  --content-default: 960px;
  --content-wide: 1200px;

  /* Radii */
  --radius-sm: 0.375rem;
  --radius-md: 0.625rem;
  --radius-lg: 1rem;
  --radius-xl: 1.5rem;
  --radius-full: 9999px;

  /* Transitions */
  --ease: cubic-bezier(0.16, 1, 0.3, 1);
  --transition: 200ms var(--ease);

  /* Fonts */
  --font-display: 'Work Sans', 'Helvetica Neue', sans-serif;
  --font-body:    'Inter', 'Helvetica Neue', sans-serif;

  /* Shadows */
  --shadow-cyan: 0 0 40px rgba(0, 212, 255, 0.15);
  --shadow-card: 0 4px 24px rgba(0, 0, 0, 0.4);
}

/* ── Reset ── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html {
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  scroll-behavior: smooth;
  scroll-padding-top: 80px;
}
body {
  font-family: var(--font-body);
  font-size: var(--text-base);
  color: var(--off-white);
  background: var(--navy);
  line-height: 1.6;
  overflow-x: hidden;
}
img, svg { display: block; max-width: 100%; }
ul { list-style: none; }
a { color: inherit; text-decoration: none; }
button { cursor: pointer; border: none; background: none; font: inherit; color: inherit; }
h1,h2,h3,h4,h5,h6 { font-family: var(--font-display); line-height: 1.15; text-wrap: balance; }
p, li { text-wrap: pretty; }
input, textarea, select { font: inherit; color: inherit; }

/* ── Utilities ── */
.container {
  width: 100%;
  max-width: var(--content-wide);
  margin-inline: auto;
  padding-inline: clamp(var(--space-6), 5vw, var(--space-16));
}
.container--narrow { max-width: var(--content-narrow); }
.container--default { max-width: var(--content-default); }

.text-cyan    { color: var(--cyan); }
.text-slate   { color: var(--slate); }
.text-green   { color: var(--green); }
.text-white   { color: var(--white); }

.section-label {
  font-family: var(--font-display);
  font-size: var(--text-xs);
  font-weight: 700;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--cyan);
  display: flex;
  align-items: center;
  gap: var(--space-2);
}
.section-label::before {
  content: '';
  display: block;
  width: 24px;
  height: 1.5px;
  background: var(--cyan);
  flex-shrink: 0;
}

/* ── Buttons ── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-4) var(--space-8);
  border-radius: var(--radius-full);
  font-family: var(--font-display);
  font-size: var(--text-sm);
  font-weight: 700;
  letter-spacing: 0.02em;
  transition: all var(--transition);
  cursor: pointer;
  text-decoration: none;
  white-space: nowrap;
}
.btn--primary {
  background: var(--cyan);
  color: var(--navy);
  box-shadow: 0 0 24px rgba(0, 212, 255, 0.35);
}
.btn--primary:hover {
  background: #33DDFF;
  box-shadow: 0 0 40px rgba(0, 212, 255, 0.55);
  transform: translateY(-1px);
}
.btn--outline {
  background: transparent;
  color: var(--off-white);
  border: 1.5px solid var(--border-light);
}
.btn--outline:hover {
  border-color: var(--cyan);
  color: var(--cyan);
  transform: translateY(-1px);
}
.btn--lg {
  padding: var(--space-5) var(--space-10);
  font-size: var(--text-base);
}

/* ── Nav ── */
.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  padding-block: var(--space-4);
  transition: background var(--transition), box-shadow var(--transition);
}
.nav.scrolled {
  background: rgba(10, 15, 30, 0.95);
  backdrop-filter: blur(16px);
  box-shadow: 0 1px 0 var(--border-light);
}
.nav__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-8);
}
.nav__logo {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: 800;
  letter-spacing: -0.02em;
}
.nav__logo .ai { color: var(--cyan); }
.nav__links {
  display: flex;
  align-items: center;
  gap: var(--space-8);
}
.nav__links a {
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--slate-light);
  transition: color var(--transition);
}
.nav__links a:hover { color: var(--white); }
.nav__cta { margin-left: auto; }

/* Mobile nav */
.nav__hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: var(--space-2);
}
.nav__hamburger span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--off-white);
  border-radius: 2px;
  transition: all var(--transition);
}

@media (max-width: 768px) {
  .nav__links, .nav__cta { display: none; }
  .nav__hamburger { display: flex; }
  .nav.mobile-open .nav__links {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 100%; left: 0; right: 0;
    background: rgba(10, 15, 30, 0.98);
    backdrop-filter: blur(16px);
    padding: var(--space-6) var(--space-6) var(--space-8);
    border-bottom: 1px solid var(--border-light);
    gap: var(--space-6);
    align-items: flex-start;
  }
  .nav.mobile-open .nav__cta {
    display: block;
    padding: 0 var(--space-6) var(--space-6);
    background: rgba(10, 15, 30, 0.98);
    backdrop-filter: blur(16px);
  }
}

/* ── Hero ── */
.hero {
  min-height: 100dvh;
  display: flex;
  align-items: center;
  position: relative;
  overflow: hidden;
  padding-top: 100px;
  padding-bottom: var(--space-24);
}
.hero__bg {
  position: absolute;
  inset: 0;
  pointer-events: none;
}
/* Ambient glow orbs */
.hero__orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  opacity: 0.5;
}
.hero__orb--1 {
  width: 600px; height: 600px;
  background: radial-gradient(circle, rgba(0,212,255,0.18) 0%, transparent 70%);
  top: -100px; left: -100px;
}
.hero__orb--2 {
  width: 400px; height: 400px;
  background: radial-gradient(circle, rgba(16,185,129,0.12) 0%, transparent 70%);
  bottom: 50px; right: -50px;
}
/* Grid lines */
.hero__grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(0,212,255,0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0,212,255,0.04) 1px, transparent 1px);
  background-size: 60px 60px;
  mask-image: radial-gradient(ellipse 80% 80% at 50% 50%, black 40%, transparent 100%);
}
.hero__content {
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-16);
  align-items: center;
}
.hero__badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-4);
  background: rgba(0,212,255,0.1);
  border: 1px solid rgba(0,212,255,0.25);
  border-radius: var(--radius-full);
  font-size: var(--text-xs);
  font-weight: 600;
  color: var(--cyan);
  letter-spacing: 0.05em;
  margin-bottom: var(--space-6);
}
.hero__badge-dot {
  width: 6px; height: 6px;
  background: var(--cyan);
  border-radius: 50%;
  animation: pulse 2s infinite;
}
@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.5; transform: scale(0.8); }
}
.hero__title {
  font-size: var(--text-hero);
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1.05;
  color: var(--white);
  margin-bottom: var(--space-6);
}
.hero__title .highlight {
  color: var(--cyan);
  position: relative;
}
.hero__subtitle {
  font-size: var(--text-lg);
  color: var(--slate-light);
  line-height: 1.6;
  max-width: 52ch;
  margin-bottom: var(--space-10);
}
.hero__actions {
  display: flex;
  gap: var(--space-4);
  flex-wrap: wrap;
  align-items: center;
}
.hero__proof {
  display: flex;
  align-items: center;
  gap: var(--space-6);
  margin-top: var(--space-10);
  padding-top: var(--space-8);
  border-top: 1px solid var(--border-light);
}
.hero__proof-item {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
}
.hero__proof-value {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-weight: 800;
  color: var(--cyan);
  letter-spacing: -0.02em;
}
.hero__proof-label {
  font-size: var(--text-xs);
  color: var(--slate);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}
.hero__proof-divider {
  width: 1px;
  height: 40px;
  background: var(--border-light);
}

/* Hero right — savings card */
.hero__visual {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}
.savings-card {
  background: var(--navy-mid);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-xl);
  padding: var(--space-8);
  box-shadow: var(--shadow-card), 0 0 60px rgba(0,212,255,0.08);
  position: relative;
  overflow: hidden;
}
.savings-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--cyan), transparent);
  opacity: 0.6;
}
.savings-card__header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: var(--space-6);
}
.savings-card__company {
  font-size: var(--text-sm);
  color: var(--slate);
}
.savings-card__name {
  font-family: var(--font-display);
  font-weight: 700;
  color: var(--off-white);
  margin-top: var(--space-1);
}
.savings-card__badge {
  display: flex;
  align-items: center;
  gap: var(--space-1);
  padding: var(--space-1) var(--space-3);
  background: rgba(16,185,129,0.15);
  border: 1px solid rgba(16,185,129,0.3);
  border-radius: var(--radius-full);
  font-size: var(--text-xs);
  font-weight: 700;
  color: var(--green);
}
.savings-card__amount {
  margin-bottom: var(--space-6);
}
.savings-card__amount-label {
  font-size: var(--text-xs);
  color: var(--slate);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: var(--space-2);
}
.savings-card__amount-value {
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  font-weight: 800;
  color: var(--green);
  letter-spacing: -0.03em;
}
.savings-card__amount-sub {
  font-size: var(--text-sm);
  color: var(--slate);
  margin-top: var(--space-1);
}
.savings-card__bars {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  margin-bottom: var(--space-6);
}
.bar-row {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
}
.bar-row__label {
  display: flex;
  justify-content: space-between;
  font-size: var(--text-xs);
  color: var(--slate);
}
.bar-row__label span:last-child { color: var(--off-white); font-weight: 600; }
.bar-track {
  height: 6px;
  background: var(--navy-light);
  border-radius: var(--radius-full);
  overflow: hidden;
}
.bar-fill {
  height: 100%;
  border-radius: var(--radius-full);
  background: linear-gradient(90deg, var(--cyan-dim), var(--cyan));
  transition: width 1s var(--ease);
}
.bar-fill--green {
  background: linear-gradient(90deg, var(--green-dim), var(--green));
}
.savings-card__footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: var(--space-5);
  border-top: 1px solid var(--border-light);
}
.savings-card__footer-label {
  font-size: var(--text-xs);
  color: var(--slate);
}
.savings-card__footer-value {
  font-family: var(--font-display);
  font-weight: 700;
  color: var(--cyan);
  font-size: var(--text-sm);
}

.mini-card {
  background: var(--navy-mid);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  padding: var(--space-5) var(--space-6);
  display: flex;
  align-items: center;
  gap: var(--space-4);
}
.mini-card__icon {
  width: 44px; height: 44px;
  background: var(--cyan-glow);
  border-radius: var(--radius-md);
  display: flex; align-items: center; justify-content: center;
  flex-shrink: 0;
  color: var(--cyan);
  font-size: 20px;
}
.mini-card__text { flex: 1; }
.mini-card__title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: var(--text-sm);
  color: var(--off-white);
}
.mini-card__sub {
  font-size: var(--text-xs);
  color: var(--slate);
}

@media (max-width: 900px) {
  .hero__content {
    grid-template-columns: 1fr;
    gap: var(--space-12);
  }
  .hero__visual { order: 2; }
}
@media (max-width: 480px) {
  .hero__proof { flex-wrap: wrap; gap: var(--space-4); }
  .hero__proof-divider { display: none; }
  .hero__actions { flex-direction: column; align-items: flex-start; }
}

/* ── Section Base ── */
.section {
  padding-block: clamp(var(--space-16), 8vw, var(--space-32));
}
.section--alt { background: var(--navy-mid); }
.section--dark { background: var(--navy); }
.section__header {
  text-align: center;
  margin-bottom: clamp(var(--space-12), 5vw, var(--space-20));
}
.section__header .section-label { justify-content: center; margin-bottom: var(--space-4); }
.section__title {
  font-size: var(--text-2xl);
  font-weight: 800;
  letter-spacing: -0.03em;
  color: var(--white);
  margin-bottom: var(--space-4);
}
.section__subtitle {
  font-size: var(--text-base);
  color: var(--slate-light);
  max-width: 54ch;
  margin-inline: auto;
  line-height: 1.7;
}

/* ── How It Works ── */
.steps {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: var(--space-6);
  position: relative;
}
.step-card {
  background: var(--navy-mid);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-xl);
  padding: var(--space-8);
  position: relative;
  overflow: hidden;
  transition: border-color var(--transition), box-shadow var(--transition);
}
.step-card:hover {
  border-color: rgba(0,212,255,0.3);
  box-shadow: 0 0 40px rgba(0,212,255,0.08);
}
.step-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--cyan), var(--green));
  opacity: 0;
  transition: opacity var(--transition);
}
.step-card:hover::before { opacity: 1; }
.step-number {
  font-family: var(--font-display);
  font-size: clamp(3rem, 5vw, 5rem);
  font-weight: 800;
  color: rgba(0,212,255,0.08);
  line-height: 1;
  margin-bottom: var(--space-4);
  letter-spacing: -0.05em;
}
.step-icon {
  width: 52px; height: 52px;
  background: var(--cyan-glow);
  border: 1px solid rgba(0,212,255,0.2);
  border-radius: var(--radius-lg);
  display: flex; align-items: center; justify-content: center;
  margin-bottom: var(--space-5);
  color: var(--cyan);
  font-size: 24px;
}
.step-card h3 {
  font-size: var(--text-lg);
  font-weight: 700;
  color: var(--white);
  margin-bottom: var(--space-3);
}
.step-card p {
  font-size: var(--text-sm);
  color: var(--slate-light);
  line-height: 1.7;
}
.step-tag {
  display: inline-block;
  margin-top: var(--space-4);
  padding: var(--space-1) var(--space-3);
  background: rgba(0,212,255,0.08);
  border-radius: var(--radius-full);
  font-size: var(--text-xs);
  color: var(--cyan);
  font-weight: 600;
}

/* ── Proof Section ── */
.proof-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-10);
  align-items: center;
}
.proof-label {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-4);
  background: rgba(16,185,129,0.1);
  border: 1px solid rgba(16,185,129,0.25);
  border-radius: var(--radius-full);
  font-size: var(--text-xs);
  font-weight: 700;
  color: var(--green);
  letter-spacing: 0.05em;
  margin-bottom: var(--space-6);
}
.proof-title {
  font-size: var(--text-2xl);
  font-weight: 800;
  color: var(--white);
  letter-spacing: -0.03em;
  margin-bottom: var(--space-5);
}
.proof-body {
  font-size: var(--text-base);
  color: var(--slate-light);
  line-height: 1.75;
  margin-bottom: var(--space-8);
}
.proof-stats {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-5);
}
.proof-stat {
  background: var(--navy-mid);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  padding: var(--space-5) var(--space-6);
}
.proof-stat__value {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-weight: 800;
  letter-spacing: -0.03em;
  margin-bottom: var(--space-1);
}
.proof-stat__label {
  font-size: var(--text-xs);
  color: var(--slate);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}
.proof-visual {
  background: var(--navy-mid);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-xl);
  padding: var(--space-8);
  box-shadow: var(--shadow-card);
  position: relative;
  overflow: hidden;
}
.proof-visual::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--green), transparent);
}
.meter-display {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-4);
  margin-bottom: var(--space-6);
}
.meter-box {
  background: var(--navy);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  padding: var(--space-5);
  text-align: center;
}
.meter-box__period {
  font-size: var(--text-xs);
  color: var(--slate);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: var(--space-2);
}
.meter-box__value {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-weight: 800;
  color: var(--white);
  letter-spacing: -0.02em;
}
.meter-box__unit {
  font-size: var(--text-xs);
  color: var(--slate);
  margin-top: var(--space-1);
}
.meter-box--after .meter-box__value { color: var(--green); }
.meter-arrow {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-3);
  margin-bottom: var(--space-6);
  font-size: var(--text-sm);
  color: var(--slate);
}
.meter-arrow__line {
  flex: 1;
  height: 1px;
  background: linear-gradient(90deg, var(--border-light), var(--green), var(--border-light));
}
.meter-result {
  background: linear-gradient(135deg, rgba(16,185,129,0.12), rgba(0,212,255,0.08));
  border: 1px solid rgba(16,185,129,0.25);
  border-radius: var(--radius-lg);
  padding: var(--space-5) var(--space-6);
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.meter-result__label { font-size: var(--text-sm); color: var(--slate-light); }
.meter-result__value {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: var(--text-lg);
  color: var(--green);
  letter-spacing: -0.02em;
}

@media (max-width: 768px) {
  .proof-grid { grid-template-columns: 1fr; }
  .proof-stats { grid-template-columns: 1fr 1fr; }
}

/* ── Why OptivAI ── */
.why-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--space-5);
}
.why-card {
  background: var(--navy-mid);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-xl);
  padding: var(--space-8);
  transition: border-color var(--transition), transform var(--transition);
}
.why-card:hover {
  border-color: rgba(0,212,255,0.25);
  transform: translateY(-3px);
}
.why-card__icon {
  font-size: 32px;
  margin-bottom: var(--space-5);
}
.why-card h3 {
  font-size: var(--text-base);
  font-weight: 700;
  color: var(--white);
  margin-bottom: var(--space-3);
}
.why-card p {
  font-size: var(--text-sm);
  color: var(--slate-light);
  line-height: 1.7;
}

/* ── Calculator / CTA ── */
.calculator-section {
  background: var(--navy-mid);
  position: relative;
  overflow: hidden;
}
.calculator-section::before {
  content: '';
  position: absolute;
  top: -200px; right: -200px;
  width: 600px; height: 600px;
  background: radial-gradient(circle, rgba(0,212,255,0.08) 0%, transparent 70%);
  pointer-events: none;
}
.calculator-wrap {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-16);
  align-items: center;
}
.calculator-text .section-label { margin-bottom: var(--space-5); }
.calculator-text h2 {
  font-size: var(--text-2xl);
  font-weight: 800;
  letter-spacing: -0.03em;
  color: var(--white);
  margin-bottom: var(--space-5);
  line-height: 1.1;
}
.calculator-text p {
  font-size: var(--text-base);
  color: var(--slate-light);
  line-height: 1.75;
  margin-bottom: var(--space-8);
}
.no-cost-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-5);
  background: rgba(16,185,129,0.1);
  border: 1px solid rgba(16,185,129,0.25);
  border-radius: var(--radius-full);
  font-size: var(--text-sm);
  font-weight: 700;
  color: var(--green);
}

.calc-card {
  background: var(--navy);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-xl);
  padding: var(--space-8);
  position: relative;
  overflow: hidden;
}
.calc-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--cyan), transparent);
}
.calc-card h3 {
  font-size: var(--text-lg);
  font-weight: 700;
  color: var(--white);
  margin-bottom: var(--space-2);
}
.calc-card > p {
  font-size: var(--text-sm);
  color: var(--slate);
  margin-bottom: var(--space-6);
}
.form-group {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  margin-bottom: var(--space-5);
}
.form-group label {
  font-size: var(--text-xs);
  font-weight: 600;
  color: var(--slate-light);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}
.form-group input, .form-group select {
  background: var(--navy-mid);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  padding: var(--space-4) var(--space-5);
  font-size: var(--text-base);
  color: var(--off-white);
  width: 100%;
  transition: border-color var(--transition), box-shadow var(--transition);
  appearance: none;
}
.form-group input::placeholder { color: var(--slate); }
.form-group input:focus, .form-group select:focus {
  outline: none;
  border-color: var(--cyan);
  box-shadow: 0 0 0 3px rgba(0,212,255,0.12);
}
.calc-result {
  background: linear-gradient(135deg, rgba(0,212,255,0.08), rgba(16,185,129,0.06));
  border: 1px solid rgba(0,212,255,0.2);
  border-radius: var(--radius-lg);
  padding: var(--space-5) var(--space-6);
  margin-bottom: var(--space-5);
  text-align: center;
  min-height: 100px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
}
.calc-result__label {
  font-size: var(--text-xs);
  color: var(--slate);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: var(--space-2);
}
.calc-result__value {
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  font-weight: 800;
  color: var(--cyan);
  letter-spacing: -0.03em;
}
.calc-result__sub {
  font-size: var(--text-xs);
  color: var(--slate);
  margin-top: var(--space-1);
}
.calc-disclaimer {
  font-size: var(--text-xs);
  color: var(--slate);
  text-align: center;
  line-height: 1.6;
  margin-top: var(--space-4);
}

@media (max-width: 768px) {
  .calculator-wrap { grid-template-columns: 1fr; gap: var(--space-10); }
}

/* ── FAQ ── */
.faq-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  max-width: var(--content-default);
  margin-inline: auto;
}
.faq-item {
  background: var(--navy-mid);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: border-color var(--transition);
}
.faq-item.open { border-color: rgba(0,212,255,0.25); }
.faq-question {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  padding: var(--space-5) var(--space-6);
  text-align: left;
  font-family: var(--font-display);
  font-size: var(--text-base);
  font-weight: 600;
  color: var(--off-white);
  cursor: pointer;
  transition: color var(--transition);
}
.faq-question:hover { color: var(--white); }
.faq-chevron {
  width: 20px; height: 20px;
  border: 1.5px solid var(--slate);
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  flex-shrink: 0;
  transition: all var(--transition);
}
.faq-item.open .faq-chevron {
  border-color: var(--cyan);
  background: rgba(0,212,255,0.1);
  transform: rotate(180deg);
}
.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s var(--ease);
}
.faq-answer-inner {
  padding: 0 var(--space-6) var(--space-5);
  font-size: var(--text-sm);
  color: var(--slate-light);
  line-height: 1.75;
}

/* ── Final CTA Banner ── */
.cta-banner {
  background: linear-gradient(135deg, rgba(0,212,255,0.08) 0%, rgba(16,185,129,0.06) 100%);
  border-top: 1px solid var(--border-light);
  border-bottom: 1px solid var(--border-light);
  text-align: center;
  padding-block: clamp(var(--space-16), 8vw, var(--space-24));
  position: relative;
  overflow: hidden;
}
.cta-banner::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(0,212,255,0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0,212,255,0.03) 1px, transparent 1px);
  background-size: 40px 40px;
}
.cta-banner__inner { position: relative; z-index: 1; }
.cta-banner h2 {
  font-size: var(--text-2xl);
  font-weight: 800;
  letter-spacing: -0.03em;
  color: var(--white);
  margin-bottom: var(--space-4);
  line-height: 1.1;
}
.cta-banner p {
  font-size: var(--text-base);
  color: var(--slate-light);
  max-width: 50ch;
  margin-inline: auto;
  margin-bottom: var(--space-8);
  line-height: 1.75;
}
.cta-banner__actions {
  display: flex;
  gap: var(--space-4);
  justify-content: center;
  flex-wrap: wrap;
}
.cta-banner__note {
  margin-top: var(--space-5);
  font-size: var(--text-xs);
  color: var(--slate);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-4);
}
.cta-banner__note span { display: flex; align-items: center; gap: var(--space-1); }

/* ── Footer ── */
.footer {
  background: var(--navy);
  border-top: 1px solid var(--border-light);
  padding-block: var(--space-12) var(--space-8);
}
.footer__top {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: var(--space-10);
  margin-bottom: var(--space-10);
  padding-bottom: var(--space-10);
  border-bottom: 1px solid var(--border-light);
}
.footer__brand {}
.footer__brand-logo {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-weight: 800;
  letter-spacing: -0.02em;
  color: var(--white);
  margin-bottom: var(--space-3);
}
.footer__brand-logo .ai { color: var(--cyan); }
.footer__brand-tagline {
  font-size: var(--text-sm);
  color: var(--slate);
  margin-bottom: var(--space-5);
}
.footer__col-title {
  font-family: var(--font-display);
  font-size: var(--text-xs);
  font-weight: 700;
  color: var(--off-white);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: var(--space-5);
}
.footer__links {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}
.footer__links a {
  font-size: var(--text-sm);
  color: var(--slate);
  transition: color var(--transition);
}
.footer__links a:hover { color: var(--off-white); }
.footer__bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: var(--space-4);
  flex-wrap: wrap;
}
.footer__copyright {
  font-size: var(--text-xs);
  color: var(--slate);
}
.footer__legal {
  display: flex;
  gap: var(--space-6);
}
.footer__legal a {
  font-size: var(--text-xs);
  color: var(--slate);
  transition: color var(--transition);
}
.footer__legal a:hover { color: var(--off-white); }

@media (max-width: 768px) {
  .footer__top { grid-template-columns: 1fr 1fr; }
  .footer__brand { grid-column: 1 / -1; }
  .footer__bottom { flex-direction: column; text-align: center; }
}
@media (max-width: 480px) {
  .footer__top { grid-template-columns: 1fr; }
}

/* ── Scroll Animations ── */
.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.65s var(--ease), transform 0.65s var(--ease);
}
.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}
.reveal-delay-1 { transition-delay: 0.1s; }
.reveal-delay-2 { transition-delay: 0.2s; }
.reveal-delay-3 { transition-delay: 0.3s; }
.reveal-delay-4 { transition-delay: 0.4s; }

/* ── Theme Toggle ── */
.theme-toggle {
  background: var(--navy-light);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-full);
  padding: var(--space-2);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--slate-light);
  width: 36px; height: 36px;
  transition: all var(--transition);
}
.theme-toggle:hover { color: var(--white); border-color: var(--cyan); }

/* ── Proof Report Card ── */
.proof-report-header { margin-bottom: var(--space-6); }
.proof-report-meta { background: var(--navy-light); border: 1px solid var(--border-light); border-radius: var(--radius-md); padding: var(--space-5); }
.proof-report-row { display: flex; justify-content: space-between; align-items: center; padding: var(--space-2) 0; border-bottom: 1px solid rgba(255,255,255,0.05); }
.proof-report-row:last-child { border-bottom: none; }
.proof-report-key { font-size: var(--text-xs); color: var(--slate); text-transform: uppercase; letter-spacing: 0.06em; }
.proof-report-val { font-size: var(--text-sm); color: var(--slate-light); font-weight: 600; }
.proof-report-card { background: var(--navy-light); border: 1px solid var(--border-light); border-radius: var(--radius-lg); padding: var(--space-8); }

/* ── Interactive Proof Bars with Tooltips ── */
.proof-bars { display: flex; flex-direction: column; gap: var(--space-5); margin-top: var(--space-6); }
.proof-bar-item { position: relative; cursor: default; }
.proof-bar-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: var(--space-2); }
.proof-bar-label { font-size: var(--text-xs); color: var(--slate-light); display: flex; align-items: center; gap: var(--space-2); }
.proof-bar-hint { font-size: 0.65rem; color: var(--slate); opacity: 0.7; font-style: italic; transition: opacity var(--transition); }
.proof-bar-value { font-size: var(--text-xs); color: var(--cyan); font-weight: 700; font-family: var(--font-display); }
.proof-bar-tooltip {
  display: none;
  position: absolute;
  bottom: calc(100% + 8px);
  left: 0; right: 0;
  background: var(--navy-mid);
  border: 1px solid var(--cyan);
  border-radius: var(--radius-md);
  padding: var(--space-4);
  font-size: var(--text-xs);
  color: var(--slate-light);
  line-height: 1.6;
  z-index: 20;
  box-shadow: 0 8px 32px rgba(0,212,255,0.15);
}
.proof-bar-math { display: block; margin-top: var(--space-2); color: var(--white); font-family: var(--font-display); font-weight: 600; }
.proof-bar-item:hover .proof-bar-tooltip { display: block; }
.proof-bar-item:hover .proof-bar-hint { opacity: 0; }
.proof-bar-item:hover .proof-bar-label { color: var(--white); }
.bar-fill--eco { background: linear-gradient(90deg, #10B981, #34D399); }
.proof-bar-item--eco .proof-bar-value { color: var(--green); }

/* ── Section CTA Nudge ── */
.section-cta-nudge { display: flex; justify-content: center; margin-top: var(--space-10); }

/* ── Hero No-Commit Text ── */
.hero__cta-wrap { display: flex; flex-direction: column; align-items: flex-start; gap: var(--space-2); }
.hero__no-commit { font-size: var(--text-xs); color: var(--slate); }

/* ── Skeptical Block ── */
.skeptical-block { margin-top: var(--space-8); padding: var(--space-6); background: rgba(255,255,255,0.03); border: 1px solid var(--border-light); border-radius: var(--radius-md); }
.skeptical-block__label { font-size: var(--text-xs); text-transform: uppercase; letter-spacing: 0.1em; color: var(--cyan); font-weight: 700; margin-bottom: var(--space-3); }
.skeptical-block p { font-size: var(--text-sm); color: var(--slate-light); line-height: 1.7; margin-bottom: var(--space-4); }
.skeptical-block__actions { display: flex; flex-wrap: wrap; gap: var(--space-3); }
.btn--sm { padding: var(--space-2) var(--space-4); font-size: var(--text-xs); gap: var(--space-2); }
.btn--ghost { background: transparent; border: 1px solid var(--border-light); color: var(--slate-light); }
.btn--ghost:hover { border-color: var(--cyan); color: var(--white); }

/* ── Auth Modal ── */
.auth-modal { position: fixed; inset: 0; z-index: 1000; display: flex; align-items: center; justify-content: center; padding: var(--space-4); }
.auth-modal[hidden] { display: none; }
.auth-modal__backdrop { position: absolute; inset: 0; background: rgba(0,0,0,0.75); backdrop-filter: blur(4px); }
.auth-modal__card {
  position: relative; z-index: 1;
  background: var(--navy-light);
  border: 1px solid rgba(0,212,255,0.25);
  border-radius: var(--radius-xl);
  padding: var(--space-10);
  width: 100%; max-width: 580px;
  max-height: 90vh; overflow-y: auto;
  box-shadow: 0 32px 80px rgba(0,0,0,0.6), 0 0 0 1px rgba(0,212,255,0.1);
  animation: modalIn 0.3s cubic-bezier(0.34,1.56,0.64,1);
}
@keyframes modalIn { from { opacity:0; transform: scale(0.95) translateY(12px); } to { opacity:1; transform: scale(1) translateY(0); } }
.auth-modal__close {
  position: absolute; top: var(--space-5); right: var(--space-5);
  background: rgba(255,255,255,0.06); border: 1px solid var(--border-light);
  border-radius: 50%; width: 36px; height: 36px;
  display: flex; align-items: center; justify-content: center;
  cursor: pointer; color: var(--slate); transition: all var(--transition);
}
.auth-modal__close:hover { background: rgba(255,255,255,0.12); color: var(--white); }
.auth-modal__icon {
  width: 64px; height: 64px; border-radius: 50%;
  background: rgba(0,212,255,0.12); border: 1px solid rgba(0,212,255,0.3);
  display: flex; align-items: center; justify-content: center;
  color: var(--cyan); margin: 0 auto var(--space-5);
}
.auth-modal__icon--pulse { animation: pulse 2s ease-in-out infinite; }
.auth-modal__icon--success { background: rgba(16,185,129,0.12); border-color: rgba(16,185,129,0.3); color: var(--green); }
.auth-modal h2 { font-size: var(--text-2xl); font-family: var(--font-display); font-weight: 800; margin-bottom: var(--space-3); text-align: center; }
.auth-modal p { font-size: var(--text-sm); color: var(--slate-light); line-height: 1.7; text-align: center; margin-bottom: var(--space-5); }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-4); }
@media (max-width: 480px) { .form-row { grid-template-columns: 1fr; } }
.auth-trust { display: flex; align-items: center; gap: var(--space-2); font-size: var(--text-xs); color: var(--slate); padding: var(--space-3) 0; border-top: 1px solid var(--border-light); margin-top: var(--space-3); }
.auth-steps-list { display: flex; flex-direction: column; gap: var(--space-4); margin: var(--space-6) 0; text-align: left; }
.auth-step-row { display: flex; align-items: flex-start; gap: var(--space-4); font-size: var(--text-sm); color: var(--slate-light); }
.auth-step-num { width: 28px; height: 28px; border-radius: 50%; background: rgba(0,212,255,0.15); border: 1px solid rgba(0,212,255,0.3); color: var(--cyan); display: flex; align-items: center; justify-content: center; font-size: var(--text-xs); font-weight: 700; flex-shrink: 0; }

/* ════════════════════════════════════════════════════════
   PLANS / TIERS
════════════════════════════════════════════════════════ */
.section--plans {
  background: var(--navy);
  padding-block: clamp(var(--space-16), 8vw, var(--space-32));
}

.plans-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-6);
  align-items: stretch;
  margin-top: var(--space-12);
}

@media (max-width: 900px) {
  .plans-grid { grid-template-columns: 1fr; max-width: 480px; margin-inline: auto; }
}

/* ── Base plan card ── */
.plan-card {
  position: relative;
  background: var(--navy-light);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-xl);
  padding: var(--space-8);
  display: flex;
  flex-direction: column;
  transition: border-color var(--transition), box-shadow var(--transition), transform var(--transition);
}
.plan-card:hover {
  border-color: rgba(0,212,255,0.3);
  box-shadow: 0 16px 48px rgba(0,0,0,0.4);
  transform: translateY(-2px);
}

/* ── Featured (Optimize) card ── */
.plan-card--featured {
  border-color: rgba(0,212,255,0.4);
  background: linear-gradient(160deg, rgba(0,212,255,0.07) 0%, var(--navy-light) 60%);
  box-shadow: 0 0 0 1px rgba(0,212,255,0.2), 0 24px 64px rgba(0,0,0,0.5);
}
.plan-card--featured:hover {
  border-color: rgba(0,212,255,0.6);
  box-shadow: 0 0 0 1px rgba(0,212,255,0.35), 0 24px 72px rgba(0,212,255,0.12);
}

/* ── Transform card ── */
.plan-card--transform {
  border-color: rgba(16,185,129,0.35);
  background: linear-gradient(160deg, rgba(16,185,129,0.07) 0%, var(--navy-light) 60%);
}
.plan-card--transform:hover {
  border-color: rgba(16,185,129,0.55);
  box-shadow: 0 16px 48px rgba(16,185,129,0.08);
}

/* ── Badge (Most Popular) ── */
.plan-card__badge {
  position: absolute;
  top: -14px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--cyan);
  color: var(--navy);
  font-size: var(--text-xs);
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: var(--space-1) var(--space-4);
  border-radius: var(--radius-full);
  white-space: nowrap;
}

/* ── Tier label ── */
.plan-tier-label {
  font-size: var(--text-xs);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--cyan);
  margin-bottom: var(--space-2);
}
.plan-card--transform .plan-tier-label { color: var(--green); }

/* ── Price ── */
.plan-price {
  font-size: clamp(2.2rem, 4vw, 3rem);
  font-family: var(--font-display);
  font-weight: 800;
  color: var(--white);
  line-height: 1;
  margin-bottom: var(--space-4);
}
.plan-price__period {
  font-size: var(--text-sm);
  font-weight: 400;
  color: var(--slate);
  font-family: var(--font-body);
}

/* ── Description ── */
.plan-desc {
  font-size: var(--text-sm);
  color: var(--slate-light);
  line-height: 1.7;
  margin-bottom: var(--space-6);
  max-width: 100%;
}

/* ── Feature list ── */
.plan-features {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  flex: 1;
  padding-block: var(--space-6);
  border-top: 1px solid var(--border-light);
  border-bottom: 1px solid var(--border-light);
  margin-bottom: var(--space-6);
}
.plan-features li {
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
  font-size: var(--text-sm);
  color: var(--slate-light);
  line-height: 1.5;
}
.plan-features li strong { color: var(--white); }

/* ── Checkmark ── */
.plan-check {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 18px;
  height: 18px;
  min-width: 18px;
  border-radius: 50%;
  background: rgba(0,212,255,0.12);
  margin-top: 1px;
}
.plan-check::after {
  content: '';
  display: block;
  width: 6px;
  height: 10px;
  border: 2px solid var(--cyan);
  border-top: none;
  border-left: none;
  transform: rotate(45deg) translate(-1px, -1px);
}
.plan-card--transform .plan-check {
  background: rgba(16,185,129,0.12);
}
.plan-card--transform .plan-check::after {
  border-color: var(--green);
}

/* ── Card footer ── */
.plan-card__footer {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

/* ── Full-width button ── */
.btn--full { width: 100%; justify-content: center; }

/* ── Cyan button (Transform CTA) ── */
.btn--cyan {
  background: var(--cyan);
  color: var(--navy);
  font-weight: 700;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-6);
  border-radius: var(--radius-md);
  font-size: var(--text-sm);
  text-decoration: none;
  transition: background var(--transition), box-shadow var(--transition), transform var(--transition);
}
.btn--cyan:hover {
  background: #00bce6;
  box-shadow: 0 0 24px rgba(0,212,255,0.35);
  transform: translateY(-1px);
}

/* ── Green button (Transform CTA) ── */
.btn--green {
  background: var(--green);
  color: #fff;
  border: none;
  box-shadow: 0 0 20px rgba(16,185,129,0.25);
}
.btn--green:hover {
  background: #0da271;
  box-shadow: 0 0 24px rgba(16,185,129,0.35);
  transform: translateY(-1px);
}

/* ── Plan note ── */
.plan-note {
  text-align: center;
  font-size: var(--text-xs);
  color: var(--slate);
  margin: 0;
}

/* ── Footnote ── */
.plans-footnote {
  text-align: center;
  font-size: var(--text-sm);
  color: var(--slate);
  margin-top: var(--space-10);
  max-width: 560px;
  margin-inline: auto;
}