/* ===========================
   Lumetech Design - style.css
   =========================== */

:root {
  --color-bg: #f8f9ff;
  --color-surface: #ffffff;
  --color-primary: #6c63ff;
  --color-accent: #38bdf8;
  --color-text: #1a1a2e;
  --color-muted: #6b7280;
  --color-light: #eef0ff;
  --font-main: 'Helvetica Neue', Arial, 'Hiragino Sans', 'Yu Gothic', sans-serif;
  --max-width: 1100px;
  --radius: 14px;
  --transition: 0.3s ease;
  --shadow: 0 4px 24px rgba(108, 99, 255, 0.08);
  --shadow-hover: 0 12px 40px rgba(108, 99, 255, 0.16);
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }

body {
  background: var(--color-bg);
  color: var(--color-text);
  font-family: var(--font-main);
  line-height: 1.8;
  -webkit-font-smoothing: antialiased;
}

/* --- Utilities --- */
.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 28px;
}

.section { padding: 100px 0; }

.section-title {
  font-size: clamp(1.6rem, 3vw, 2.2rem);
  font-weight: 800;
  letter-spacing: -0.01em;
  margin-bottom: 12px;
  color: var(--color-text);
}

.section-title::after {
  content: '';
  display: block;
  width: 40px;
  height: 3px;
  background: linear-gradient(90deg, var(--color-primary), var(--color-accent));
  border-radius: 2px;
  margin-top: 10px;
}

.section-title.center { text-align: center; }
.section-title.center::after { margin: 10px auto 0; }

.section-sub {
  font-size: 1rem;
  color: var(--color-muted);
  margin-bottom: 48px;
}
.section-sub.center { text-align: center; }

/* --- Header --- */
.header {
  position: fixed;
  top: 0; left: 0;
  width: 100%;
  z-index: 100;
  padding: 18px 0;
  background: rgba(248, 249, 255, 0.92);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid rgba(108, 99, 255, 0.08);
  transition: box-shadow var(--transition);
}

.header.scrolled { box-shadow: 0 2px 20px rgba(108, 99, 255, 0.08); }

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo {
  font-size: 1.25rem;
  font-weight: 800;
  letter-spacing: 0.02em;
  color: var(--color-text);
  text-decoration: none;
}
.logo-lume { color: var(--color-accent); }
.logo-tech { color: var(--color-primary); }

.nav ul {
  list-style: none;
  display: flex;
  align-items: center;
  gap: 28px;
}

.nav a {
  color: var(--color-muted);
  text-decoration: none;
  font-size: 0.88rem;
  font-weight: 500;
  letter-spacing: 0.04em;
  transition: color var(--transition);
}
.nav a:hover { color: var(--color-primary); }

.nav-cta {
  background: var(--color-primary) !important;
  color: #fff !important;
  padding: 9px 20px;
  border-radius: 50px;
  font-weight: 700 !important;
  transition: opacity var(--transition), transform var(--transition) !important;
}
.nav-cta:hover { opacity: 0.85 !important; transform: translateY(-1px); }

/* --- Hero --- */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding: 140px 28px 100px;
  position: relative;
  overflow: hidden;
  background: var(--color-bg);
}

.hero-bg-shape {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  opacity: 0.45;
  pointer-events: none;
}
.shape1 {
  width: 600px; height: 600px;
  background: radial-gradient(circle, rgba(56,189,248,0.3), transparent 70%);
  top: -100px; right: -100px;
}
.shape2 {
  width: 500px; height: 500px;
  background: radial-gradient(circle, rgba(108,99,255,0.25), transparent 70%);
  bottom: -80px; left: -80px;
}

.hero-content {
  position: relative;
  z-index: 1;
  max-width: 720px;
}

.hero-badge {
  display: inline-block;
  background: linear-gradient(135deg, rgba(108,99,255,0.12), rgba(56,189,248,0.12));
  color: var(--color-primary);
  border: 1px solid rgba(108,99,255,0.2);
  border-radius: 50px;
  padding: 6px 18px;
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  margin-bottom: 24px;
}

.hero-title {
  font-size: clamp(2.4rem, 5.5vw, 4rem);
  font-weight: 900;
  line-height: 1.25;
  letter-spacing: -0.02em;
  margin-bottom: 24px;
  color: var(--color-text);
}

.hero-title .highlight {
  background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-desc {
  font-size: 1.05rem;
  color: var(--color-muted);
  margin-bottom: 40px;
  line-height: 2;
}

.hero-actions {
  display: flex;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 56px;
}

.hero-trust {
  display: flex;
  align-items: center;
  gap: 24px;
  flex-wrap: wrap;
}

.trust-item {
  display: flex;
  flex-direction: column;
  gap: 2px;
}
.trust-item strong {
  font-size: 1.1rem;
  font-weight: 800;
  color: var(--color-primary);
}
.trust-item span {
  font-size: 0.78rem;
  color: var(--color-muted);
}

.trust-divider {
  width: 1px;
  height: 36px;
  background: rgba(108,99,255,0.2);
}

/* --- Buttons --- */
.btn-primary {
  display: inline-block;
  padding: 14px 32px;
  background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
  color: #fff;
  font-weight: 700;
  font-size: 0.95rem;
  letter-spacing: 0.04em;
  border-radius: 50px;
  text-decoration: none;
  border: none;
  cursor: pointer;
  box-shadow: 0 4px 20px rgba(108,99,255,0.3);
  transition: opacity var(--transition), transform var(--transition), box-shadow var(--transition);
}
.btn-primary:hover {
  opacity: 0.88;
  transform: translateY(-2px);
  box-shadow: 0 8px 32px rgba(108,99,255,0.4);
}
.btn-primary.btn-large { padding: 16px 40px; font-size: 1rem; }

.btn-ghost {
  display: inline-block;
  padding: 14px 28px;
  color: var(--color-primary);
  font-weight: 700;
  font-size: 0.95rem;
  border: 2px solid rgba(108,99,255,0.3);
  border-radius: 50px;
  text-decoration: none;
  transition: border-color var(--transition), background var(--transition);
}
.btn-ghost:hover {
  border-color: var(--color-primary);
  background: rgba(108,99,255,0.05);
}

/* --- Pain Section --- */
.pain {
  background: var(--color-light);
  padding: 80px 0;
}

.pain-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 20px;
  margin: 40px 0 32px;
}

.pain-card {
  background: var(--color-surface);
  border-radius: var(--radius);
  padding: 32px 24px;
  text-align: center;
  box-shadow: var(--shadow);
  font-size: 0.95rem;
  color: var(--color-muted);
  line-height: 1.7;
}

.pain-icon {
  font-size: 2rem;
  display: block;
  margin-bottom: 12px;
}

.solution-arrow {
  text-align: center;
  font-size: 1rem;
  font-weight: 700;
  color: var(--color-primary);
  margin-top: 8px;
  letter-spacing: 0.02em;
}

/* --- About --- */
.about { background: var(--color-surface); }

.about-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
}

.about-text .section-title { margin-bottom: 20px; }

.about-text p {
  font-size: 0.97rem;
  color: var(--color-muted);
  line-height: 2;
  margin-bottom: 24px;
}

.about-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.about-list li {
  font-size: 0.9rem;
  color: var(--color-text);
  font-weight: 500;
}

.about-visual {
  display: flex;
  justify-content: center;
}

.about-card-stack {
  position: relative;
  width: 260px;
  height: 220px;
}

.acard {
  position: absolute;
  background: var(--color-surface);
  border: 1px solid rgba(108,99,255,0.15);
  border-radius: var(--radius);
  padding: 20px 28px;
  font-weight: 700;
  font-size: 0.9rem;
  box-shadow: var(--shadow);
  color: var(--color-primary);
  letter-spacing: 0.04em;
}

.acard1 { top: 0; left: 0; background: linear-gradient(135deg, #f0eeff, #fff); }
.acard2 { top: 60px; left: 30px; background: linear-gradient(135deg, #e8f7ff, #fff); color: var(--color-accent); }
.acard3 { top: 120px; left: 60px; background: linear-gradient(135deg, #f0eeff, #e8f7ff); }

/* --- Service --- */
.service { background: var(--color-bg); }

.cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 24px;
}

.card {
  background: var(--color-surface);
  border: 1px solid rgba(108,99,255,0.1);
  border-radius: var(--radius);
  padding: 40px 32px;
  position: relative;
  box-shadow: var(--shadow);
  transition: box-shadow var(--transition), transform var(--transition), border-color var(--transition);
}
.card:hover {
  box-shadow: var(--shadow-hover);
  transform: translateY(-6px);
  border-color: rgba(108,99,255,0.25);
}

.card-featured {
  border-color: rgba(108,99,255,0.3);
  background: linear-gradient(160deg, #f5f3ff 0%, #fff 60%);
}

.card-badge {
  position: absolute;
  top: 20px; right: 20px;
  background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
  color: #fff;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  padding: 4px 12px;
  border-radius: 50px;
}

.card-num {
  font-size: 0.72rem;
  font-weight: 800;
  letter-spacing: 0.12em;
  color: rgba(108,99,255,0.35);
  margin-bottom: 8px;
}

.card-icon-label {
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: 12px;
}

.card h3 {
  font-size: 1.2rem;
  font-weight: 800;
  margin-bottom: 12px;
  color: var(--color-text);
}

.card p {
  font-size: 0.88rem;
  color: var(--color-muted);
  line-height: 1.85;
  margin-bottom: 20px;
}

.card-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 7px;
}

.card-list li {
  font-size: 0.83rem;
  color: var(--color-text);
  padding-left: 16px;
  position: relative;
}
.card-list li::before {
  content: '✓';
  position: absolute;
  left: 0;
  color: var(--color-primary);
  font-weight: 700;
}

/* --- Flow --- */
.flow { background: var(--color-light); }

.flow-steps {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  flex-wrap: wrap;
  margin-top: 8px;
}

.flow-step {
  flex: 1;
  min-width: 180px;
  background: var(--color-surface);
  border-radius: var(--radius);
  padding: 32px 24px;
  box-shadow: var(--shadow);
  text-align: center;
}

.flow-num {
  font-size: 0.72rem;
  font-weight: 800;
  letter-spacing: 0.14em;
  color: var(--color-primary);
  margin-bottom: 12px;
}

.flow-step h3 {
  font-size: 1rem;
  font-weight: 800;
  margin-bottom: 10px;
  color: var(--color-text);
}

.flow-step p {
  font-size: 0.84rem;
  color: var(--color-muted);
  line-height: 1.7;
}

.flow-arrow {
  font-size: 1.4rem;
  color: rgba(108,99,255,0.3);
  align-self: center;
  padding-top: 8px;
}

/* --- FAQ --- */
.faq { background: var(--color-surface); }

.faq-list {
  max-width: 720px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.faq-item {
  background: var(--color-bg);
  border: 1px solid rgba(108,99,255,0.1);
  border-radius: var(--radius);
  overflow: hidden;
  transition: border-color var(--transition);
}
.faq-item[open] { border-color: rgba(108,99,255,0.3); }

.faq-item summary {
  padding: 20px 24px;
  font-weight: 700;
  font-size: 0.95rem;
  cursor: pointer;
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
  color: var(--color-text);
  user-select: none;
}
.faq-item summary::after {
  content: '+';
  font-size: 1.3rem;
  color: var(--color-primary);
  font-weight: 300;
  flex-shrink: 0;
  margin-left: 12px;
  transition: transform var(--transition);
}
.faq-item[open] summary::after {
  transform: rotate(45deg);
}
.faq-item summary::-webkit-details-marker { display: none; }

.faq-item p {
  padding: 0 24px 20px;
  font-size: 0.9rem;
  color: var(--color-muted);
  line-height: 1.85;
}

/* --- CTA Banner --- */
.cta-banner {
  background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
  padding: 80px 28px;
  text-align: center;
}
.cta-banner h2 {
  font-size: clamp(1.6rem, 3.5vw, 2.4rem);
  font-weight: 900;
  color: #fff;
  margin-bottom: 16px;
}
.cta-banner p {
  color: rgba(255,255,255,0.85);
  font-size: 1rem;
  margin-bottom: 36px;
}
.cta-banner .btn-primary {
  background: #fff;
  color: var(--color-primary);
  box-shadow: 0 4px 24px rgba(0,0,0,0.15);
}
.cta-banner .btn-primary:hover { opacity: 0.92; }

/* --- Contact --- */
.contact { background: var(--color-bg); }

.contact-email {
  text-align: center;
  margin-bottom: 36px;
}
.contact-email a {
  color: var(--color-primary);
  text-decoration: none;
  font-size: 1rem;
  font-weight: 700;
  letter-spacing: 0.03em;
  transition: opacity var(--transition);
}
.contact-email a:hover { opacity: 0.7; }

.contact-form {
  display: flex;
  flex-direction: column;
  gap: 14px;
  max-width: 620px;
  margin: 0 auto;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
}

.contact-form input,
.contact-form textarea,
.contact-form select {
  background: var(--color-surface);
  border: 1.5px solid rgba(108,99,255,0.15);
  border-radius: 10px;
  padding: 14px 18px;
  color: var(--color-text);
  font-size: 0.93rem;
  font-family: var(--font-main);
  transition: border-color var(--transition), box-shadow var(--transition);
  outline: none;
  width: 100%;
}
.contact-form input:focus,
.contact-form textarea:focus,
.contact-form select:focus {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(108,99,255,0.1);
}
.contact-form input::placeholder,
.contact-form textarea::placeholder { color: var(--color-muted); }
.contact-form select { color: var(--color-muted); cursor: pointer; }
.contact-form .btn-primary { align-self: center; }

/* --- Footer --- */
.footer {
  background: var(--color-text);
  padding: 40px 28px;
}
.footer-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 16px;
}
.footer .logo { color: #fff; font-size: 1.1rem; }
.footer .logo-lume { color: var(--color-accent); }
.footer .logo-tech { color: var(--color-primary); }
.footer-copy {
  font-size: 0.8rem;
  color: rgba(255,255,255,0.4);
}

/* --- Scroll Fade --- */
.fade-in {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.65s ease, transform 0.65s ease;
}
.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

/* --- Responsive --- */
@media (max-width: 768px) {
  .nav ul { gap: 16px; }
  .nav a:not(.nav-cta) { display: none; }

  .hero-desc br { display: none; }
  .hero-actions { flex-direction: column; align-items: flex-start; }

  .about-inner { grid-template-columns: 1fr; }
  .about-visual { display: none; }

  .flow-steps { flex-direction: column; }
  .flow-arrow { transform: rotate(90deg); align-self: center; }

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

  .footer-inner { flex-direction: column; text-align: center; }
}