/* ============================================
   QUANTIFAI.WORK — Marketing Site Styles
   Circuit-precision aesthetic
   ============================================ */

/* ── Reset & Base ── */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

:root {
  --primary:       #00a38c;
  --accent:        #4ac2d1;
  --dark:          #0a2f50;
  --dark-mid:      #081f38;
  --dark-light:    #0e3a5e;
  --card-bg:       #0d3352;
  --text:          #ffffff;
  --text-muted:    #a0c4d8;
  --text-dim:      #4a7a96;
  --border:        rgba(74, 194, 209, 0.18);
  --border-strong: rgba(74, 194, 209, 0.36);
  --glow:          0 0 28px rgba(0, 163, 140, 0.18);
  --glow-strong:   0 0 48px rgba(0, 163, 140, 0.28);

  --font-display: 'Exo 2', sans-serif;
  --font-mono:    'JetBrains Mono', monospace;
  --font-body:    'Inter', sans-serif;

  --section-pad:   clamp(80px, 10vw, 140px);
  --container-max: 1200px;
  --radius:        8px;
  --radius-lg:     14px;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  background-color: var(--dark);
  color: var(--text);
  font-family: var(--font-body);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* ── Layout ── */
.container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 clamp(20px, 5vw, 60px);
}

.section {
  padding: var(--section-pad) 0;
  position: relative;
}

/* ── Type ── */
.section-label {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.22em;
  color: var(--accent);
  margin-bottom: 1.2rem;
  opacity: 0.75;
}

.section-title {
  font-family: var(--font-display);
  font-size: clamp(2.2rem, 5vw, 3.6rem);
  font-weight: 800;
  line-height: 1.08;
  margin-bottom: 1.5rem;
  color: var(--text);
  letter-spacing: -0.01em;
}

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

.section-sub {
  color: var(--text-muted);
  font-size: 1.05rem;
  max-width: 560px;
  margin-bottom: 3rem;
  line-height: 1.7;
}

/* ── Buttons ── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.75rem 1.75rem;
  border-radius: var(--radius);
  font-family: var(--font-body);
  font-size: 0.9rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  cursor: pointer;
  text-decoration: none;
  transition: all 0.22s ease;
  border: none;
  white-space: nowrap;
}

.btn-primary {
  background: var(--primary);
  color: #fff;
}
.btn-primary:hover {
  background: var(--accent);
  color: var(--dark);
  box-shadow: var(--glow-strong);
  transform: translateY(-2px);
}

.btn-outline {
  background: transparent;
  color: var(--accent);
  border: 1px solid var(--border-strong);
}
.btn-outline:hover {
  background: rgba(45, 212, 191, 0.07);
  border-color: var(--accent);
  box-shadow: var(--glow);
  transform: translateY(-2px);
}

.btn-lg  { padding: 1rem 2.5rem; font-size: 1rem; }
.btn-full { width: 100%; }


/* ════════════════════════════════
   NAV
   ════════════════════════════════ */
.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  padding: 1.3rem 0;
  transition: background 0.3s ease, padding 0.3s ease, border-color 0.3s ease;
  border-bottom: 1px solid transparent;
}

.nav.scrolled {
  background: rgba(13, 47, 42, 0.94);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  padding: 0.9rem 0;
  border-bottom-color: var(--border);
}

.nav-inner {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 clamp(20px, 5vw, 60px);
  display: flex;
  align-items: center;
  gap: 2rem;
}

.nav-logo {
  font-family: var(--font-mono);
  font-size: 1.05rem;
  font-weight: 500;
  color: var(--text);
  text-decoration: none;
  letter-spacing: 0.06em;
  flex-shrink: 0;
}
.nav-logo-dot { color: var(--accent); }

.nav-links {
  display: flex;
  list-style: none;
  gap: 2rem;
  margin-left: auto;
}
.nav-links a {
  color: var(--text-muted);
  text-decoration: none;
  font-size: 0.88rem;
  font-weight: 500;
  transition: color 0.2s;
}
.nav-links a:hover { color: var(--accent); }

.nav-cta { flex-shrink: 0; margin-left: 1rem; }

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
  margin-left: auto;
  z-index: 101;
}
.nav-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--text);
  transition: all 0.25s ease;
  transform-origin: center;
}
.nav-toggle.active span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle.active span:nth-child(2) { opacity: 0; }
.nav-toggle.active span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }


/* ════════════════════════════════
   HERO
   ════════════════════════════════ */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  overflow: hidden;
  padding-top: 100px;
  padding-bottom: 60px;
}

.hero-bg {
  position: absolute;
  inset: 0;
  z-index: 0;
  background:
    radial-gradient(ellipse at 15% 55%, rgba(0, 163, 140, 0.16) 0%, transparent 58%),
    radial-gradient(ellipse at 85% 15%, rgba(74, 194, 209, 0.08) 0%, transparent 50%);
}

/* Animated circuit grid */
.circuit-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(45, 212, 191, 0.07) 1px, transparent 1px),
    linear-gradient(90deg, rgba(45, 212, 191, 0.07) 1px, transparent 1px);
  background-size: 64px 64px;
  animation: gridMove 28s linear infinite;
  mask-image: radial-gradient(ellipse at 50% 50%, black 25%, transparent 75%);
  -webkit-mask-image: radial-gradient(ellipse at 50% 50%, black 25%, transparent 75%);
}

@keyframes gridMove {
  from { background-position: 0 0; }
  to   { background-position: 64px 64px; }
}

.hero-glow {
  position: absolute;
  border-radius: 50%;
  filter: blur(90px);
  pointer-events: none;
}
.hero-glow-1 {
  width: 640px; height: 420px;
  background: rgba(0, 163, 140, 0.2);
  top: 15%; left: -8%;
  animation: glowPulse 9s ease-in-out infinite;
}
.hero-glow-2 {
  width: 380px; height: 280px;
  background: rgba(74, 194, 209, 0.08);
  bottom: 20%; right: 8%;
  animation: glowPulse 13s ease-in-out infinite reverse;
}

@keyframes glowPulse {
  0%, 100% { opacity: 0.55; transform: scale(1); }
  50%       { opacity: 1;    transform: scale(1.12); }
}

.hero-content {
  position: relative;
  z-index: 1;
  max-width: 820px;
}

.hero-label {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.24em;
  color: var(--accent);
  opacity: 0.65;
  margin-bottom: 1.6rem;
  animation: fadeUp 0.9s ease both;
}

.hero-headline {
  font-family: var(--font-display);
  font-size: clamp(3.2rem, 9vw, 6.4rem);
  font-weight: 800;
  line-height: 1.0;
  margin-bottom: 1.5rem;
  letter-spacing: -0.025em;
  animation: fadeUp 0.9s 0.1s ease both;
}

.hero-sub {
  font-size: clamp(1rem, 2.2vw, 1.2rem);
  color: var(--text-muted);
  max-width: 520px;
  margin-bottom: 2.5rem;
  line-height: 1.75;
  font-weight: 300;
  animation: fadeUp 0.9s 0.2s ease both;
}

.hero-actions {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
  margin-bottom: 3.5rem;
  animation: fadeUp 0.9s 0.3s ease both;
}

.hero-stats {
  display: flex;
  align-items: center;
  gap: 2rem;
  animation: fadeUp 0.9s 0.45s ease both;
}

.stat {
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
}
.stat-num {
  font-family: var(--font-mono);
  font-size: 1.5rem;
  font-weight: 500;
  color: var(--accent);
  line-height: 1;
}
.stat-label {
  font-size: 0.68rem;
  color: var(--text-dim);
  letter-spacing: 0.06em;
  text-transform: uppercase;
}
.stat-divider {
  width: 1px;
  height: 38px;
  background: var(--border);
}

@keyframes fadeUp {
  from { opacity: 0; transform: translateY(22px); }
  to   { opacity: 1; transform: translateY(0); }
}

.hero-scroll {
  position: absolute;
  bottom: 2.5rem; left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.75rem;
  z-index: 1;
}
.hero-scroll span {
  font-family: var(--font-mono);
  font-size: 0.6rem;
  letter-spacing: 0.22em;
  color: var(--text-dim);
  text-transform: uppercase;
}
.scroll-line {
  width: 1px; height: 50px;
  background: linear-gradient(to bottom, var(--accent), transparent);
  animation: scrollFade 2.2s ease-in-out infinite;
}
@keyframes scrollFade {
  0%, 100% { opacity: 0.25; }
  50%       { opacity: 0.8; }
}


/* ════════════════════════════════
   PROBLEM
   ════════════════════════════════ */
.problem {
  background: var(--dark-mid);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.problem-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.25rem;
  margin-top: 3rem;
}

.problem-card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 2.25rem 2rem;
  position: relative;
  overflow: hidden;
  transition: transform 0.25s ease, box-shadow 0.25s ease, border-color 0.25s ease;
}
.problem-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--accent), transparent);
  opacity: 0;
  transition: opacity 0.3s;
}
.problem-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--glow-strong);
  border-color: var(--border-strong);
}
.problem-card:hover::before { opacity: 1; }

.problem-icon {
  width: 44px; height: 44px;
  color: var(--accent);
  margin-bottom: 1.25rem;
  opacity: 0.85;
}
.problem-icon svg { width: 100%; height: 100%; }

.problem-card h3 {
  font-family: var(--font-display);
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 0.7rem;
}
.problem-card p {
  color: var(--text-muted);
  font-size: 0.9rem;
  line-height: 1.65;
}


/* ════════════════════════════════
   SERVICES
   ════════════════════════════════ */
.services-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 1.2rem;
  margin-top: 3.5rem;
}

.service-card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-left: 3px solid var(--primary);
  border-radius: var(--radius-lg);
  padding: 2rem 1.75rem;
  position: relative;
  overflow: hidden;
  transition: transform 0.25s ease, box-shadow 0.25s ease, border-left-color 0.25s ease;
}
.service-card::after {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at top right, rgba(45,212,191,0.035), transparent 60%);
  pointer-events: none;
}
.service-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--glow);
  border-left-color: var(--accent);
}

.service-num {
  font-family: var(--font-mono);
  font-size: 0.62rem;
  letter-spacing: 0.18em;
  color: var(--text-dim);
  margin-bottom: 1rem;
}
.service-icon {
  width: 34px; height: 34px;
  color: var(--accent);
  margin-bottom: 1rem;
}
.service-icon svg { width: 100%; height: 100%; }

.service-card h3 {
  font-family: var(--font-display);
  font-size: 1.05rem;
  font-weight: 700;
  margin-bottom: 0.6rem;
}
.service-card p {
  color: var(--text-muted);
  font-size: 0.875rem;
  line-height: 1.65;
  margin-bottom: 1.25rem;
}

.service-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
}
.service-tags span {
  font-family: var(--font-mono);
  font-size: 0.62rem;
  letter-spacing: 0.07em;
  padding: 0.22rem 0.65rem;
  background: rgba(45, 212, 191, 0.07);
  border: 1px solid rgba(45, 212, 191, 0.18);
  border-radius: 100px;
  color: var(--accent);
}


/* ════════════════════════════════
   HOW IT WORKS
   ════════════════════════════════ */
.how-it-works {
  background: var(--dark-mid);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.steps {
  margin-top: 4rem;
  display: flex;
  flex-direction: column;
}

.step {
  display: grid;
  grid-template-columns: 110px 1fr;
  gap: 3rem;
  align-items: start;
}

.step-num {
  font-family: var(--font-mono);
  font-size: clamp(3.5rem, 8vw, 6rem);
  font-weight: 500;
  color: rgba(45, 212, 191, 0.1);
  line-height: 1;
  letter-spacing: -0.04em;
  padding-top: 0.4rem;
  user-select: none;
}

.step-content {
  border-left: 1px solid var(--border);
  padding: 0.5rem 0 3.5rem 2.5rem;
  position: relative;
}
.step-content::before {
  content: '';
  position: absolute;
  left: -5px; top: 14px;
  width: 9px; height: 9px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 14px var(--accent);
}
.step-content.last {
  padding-bottom: 0.5rem;
}

.step-tag {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  letter-spacing: 0.16em;
  color: var(--accent);
  opacity: 0.75;
  margin-bottom: 0.7rem;
}
.step-content h3 {
  font-family: var(--font-display);
  font-size: clamp(1.5rem, 3.5vw, 2.1rem);
  font-weight: 700;
  margin-bottom: 0.75rem;
}
.step-content p {
  color: var(--text-muted);
  font-size: 0.95rem;
  line-height: 1.75;
  max-width: 500px;
}


/* ════════════════════════════════
   PRICING
   ════════════════════════════════ */
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(270px, 1fr));
  gap: 1.4rem;
  margin-top: 3rem;
  align-items: start;
}

.pricing-card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 2.5rem 2rem;
  display: flex;
  flex-direction: column;
  gap: 1.4rem;
  position: relative;
  transition: transform 0.25s ease, box-shadow 0.25s ease;
}
.pricing-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--glow);
}

.pricing-featured {
  border-color: var(--primary);
  background: linear-gradient(150deg, rgba(26, 138, 122, 0.14) 0%, var(--card-bg) 60%);
  box-shadow: var(--glow);
  transform: scale(1.03);
}
.pricing-featured:hover {
  transform: scale(1.03) translateY(-4px);
  box-shadow: var(--glow-strong);
}

.pricing-badge {
  position: absolute;
  top: -13px; left: 50%;
  transform: translateX(-50%);
  background: var(--primary);
  color: #fff;
  font-family: var(--font-mono);
  font-size: 0.62rem;
  letter-spacing: 0.14em;
  padding: 0.28rem 1rem;
  border-radius: 100px;
  white-space: nowrap;
}

.pricing-tier {
  font-family: var(--font-display);
  font-size: 1.6rem;
  font-weight: 800;
}
.pricing-size {
  font-family: var(--font-mono);
  font-size: 0.67rem;
  letter-spacing: 0.1em;
  color: var(--text-dim);
  margin-top: -1.2rem;
}

.pricing-price {
  display: flex;
  align-items: baseline;
  gap: 0.3rem;
  border-top: 1px solid var(--border);
  padding-top: 1.5rem;
}
.price-range {
  font-family: var(--font-mono);
  font-size: 1.55rem;
  font-weight: 500;
  color: var(--accent);
}
.price-unit {
  font-size: 0.85rem;
  color: var(--text-muted);
}

.pricing-features {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.65rem;
  flex: 1;
}
.pricing-features li {
  font-size: 0.88rem;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  gap: 0.7rem;
}
.pricing-features .check { color: var(--accent); font-weight: 700; flex-shrink: 0; }
.pricing-features .minus { color: var(--text-dim); flex-shrink: 0; }

.pricing-note {
  text-align: center;
  margin-top: 2.5rem;
  font-size: 0.875rem;
  color: var(--text-muted);
}
.pricing-note strong { color: var(--accent); }


/* ════════════════════════════════
   CONTACT
   ════════════════════════════════ */
.contact {
  background: var(--dark-mid);
  border-top: 1px solid var(--border);
}

.contact-inner {
  display: grid;
  grid-template-columns: 1fr 1.35fr;
  gap: 6rem;
  align-items: start;
}

.contact-text .section-title { margin-bottom: 1rem; }
.contact-text > p {
  color: var(--text-muted);
  font-size: 0.95rem;
  line-height: 1.75;
  margin-bottom: 2rem;
}

.contact-notice {
  display: flex;
  align-items: center;
  gap: 0.8rem;
  background: rgba(45, 212, 191, 0.05);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 0.9rem 1.2rem;
  margin-bottom: 2.5rem;
  font-size: 0.875rem;
  color: var(--text-muted);
}
.notice-dot {
  width: 8px; height: 8px;
  border-radius: 50%;
  background: var(--accent);
  flex-shrink: 0;
  box-shadow: 0 0 8px var(--accent);
  animation: dotPulse 2.2s ease-in-out infinite;
}
@keyframes dotPulse {
  0%, 100% { box-shadow: 0 0 8px var(--accent);  opacity: 0.7; }
  50%       { box-shadow: 0 0 20px var(--accent); opacity: 1;   }
}
.contact-notice strong { color: var(--text); }

.contact-info {
  display: flex;
  flex-direction: column;
  gap: 0.9rem;
}
.contact-info-item {
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
}
.contact-info-label {
  font-family: var(--font-mono);
  font-size: 0.62rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--text-dim);
}
.contact-info-item a,
.contact-info-item span {
  font-size: 0.95rem;
  color: var(--accent);
  text-decoration: none;
  transition: opacity 0.2s;
}
.contact-info-item a:hover { opacity: 0.7; }

/* Form */
.contact-form {
  display: flex;
  flex-direction: column;
  gap: 1.2rem;
}
.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}
.form-group {
  display: flex;
  flex-direction: column;
  gap: 0.45rem;
}
.form-group label {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--text-muted);
}
.form-group input,
.form-group textarea {
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 0.875rem 1rem;
  color: var(--text);
  font-family: var(--font-body);
  font-size: 0.9rem;
  outline: none;
  width: 100%;
  transition: border-color 0.2s, box-shadow 0.2s;
}
.form-group input::placeholder,
.form-group textarea::placeholder { color: var(--text-dim); }
.form-group input:focus,
.form-group textarea:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(26, 138, 122, 0.14);
}
.form-group textarea {
  resize: vertical;
  min-height: 120px;
}


/* ════════════════════════════════
   FOOTER
   ════════════════════════════════ */
.footer {
  background: #080e0d;
  border-top: 1px solid var(--border);
}

.footer-inner {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 4rem;
  padding-top: 4rem;
  padding-bottom: 3rem;
  align-items: start;
}

.footer-logo {
  font-family: var(--font-mono);
  font-size: 1.15rem;
  letter-spacing: 0.07em;
  color: var(--text);
  margin-bottom: 0.65rem;
}
.footer-logo span { color: var(--accent); }

.footer-tagline {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 0.4rem;
}
.footer-domain {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--text-dim);
  letter-spacing: 0.07em;
}

.footer-links { display: flex; gap: 4rem; }

.footer-col {
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
}
.footer-col-title {
  font-family: var(--font-mono);
  font-size: 0.62rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--text-dim);
  margin-bottom: 0.4rem;
}
.footer-col a {
  font-size: 0.875rem;
  color: var(--text-muted);
  text-decoration: none;
  transition: color 0.2s;
}
.footer-col a:hover { color: var(--accent); }

.footer-bottom {
  border-top: 1px solid var(--border);
  padding: 1.2rem 0;
}
.footer-bottom-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
}
.footer-bottom span {
  font-size: 0.78rem;
  color: var(--text-dim);
}
.footer-mono {
  font-family: var(--font-mono) !important;
  font-size: 0.6rem !important;
  letter-spacing: 0.24em !important;
  opacity: 0.35;
}


/* ════════════════════════════════
   RESPONSIVE
   ════════════════════════════════ */
@media (max-width: 900px) {
  .nav-links {
    position: fixed;
    top: 0; left: 0; right: 0; bottom: 0;
    background: rgba(13, 47, 42, 0.97);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 2.5rem;
    display: none;
    z-index: 99;
    list-style: none;
  }
  .nav-links.open { display: flex; }
  .nav-links a { font-size: 1.3rem; color: var(--text); }

  .nav-toggle { display: flex; }
  .nav-cta    { display: none; }

  .contact-inner { grid-template-columns: 1fr; gap: 3rem; }
  .footer-inner  { grid-template-columns: 1fr; gap: 2.5rem; }
  .footer-links  { gap: 2.5rem; }
}

@media (max-width: 640px) {
  .hero-actions { flex-direction: column; }
  .hero-actions .btn { width: 100%; text-align: center; }
  .hero-stats { gap: 1.25rem; }

  .step { grid-template-columns: 72px 1fr; gap: 1.25rem; }
  .step-num { font-size: 3rem; }

  .form-row { grid-template-columns: 1fr; }

  .pricing-featured { transform: none; }
  .pricing-featured:hover { transform: translateY(-4px); }

  .footer-links { flex-direction: column; gap: 1.5rem; }
}