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

:root {
  --bg:        #211C1F;
  --bg-alt:    #2a2420;
  --card-bg:   #2d2825;
  --border:    rgba(173,172,160,0.14);
  --white:     #ffffff;
  --muted:     #ADACA0;
  --accent:    #CE5627;
  --font:      'Inter', sans-serif;
}

html { scroll-behavior: smooth; }

body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--white);
  -webkit-font-smoothing: antialiased;
}

img { display: block; max-width: 100%; }
a { text-decoration: none; color: inherit; }
ul { list-style: none; }

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 48px;
}

/* ── Navbar ── */
.navbar {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 48px;
  background: rgba(0,0,0,0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  transition: background 0.3s;
}

.nav-logo { display: flex; align-items: center; }
.logo-img { height: 28px; width: auto; }

.nav-links {
  display: flex;
  gap: 48px;
}

.nav-links a {
  font-size: 14px;
  font-weight: 400;
  color: rgba(255,255,255,0.75);
  letter-spacing: 0.02em;
  transition: color 0.2s;
}
.nav-links a:hover { color: var(--white); }

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}
.nav-toggle span {
  display: block;
  width: 22px;
  height: 1.5px;
  background: var(--white);
  transition: transform 0.3s, opacity 0.3s;
}

/* ── Hero ── */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  padding: 80px 48px 100px;
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  inset: 0;
  background-image: url('https://images.unsplash.com/photo-1694400996388-918679ad0fa1?auto=format&fit=crop&w=1920&q=80');
  background-size: cover;
  background-position: center;
  filter: brightness(0.25);
  z-index: 0;
}

.hero-content {
  position: relative;
  z-index: 1;
  max-width: 800px;
}

.hero-content h1 {
  font-size: clamp(52px, 7vw, 96px);
  font-weight: 300;
  line-height: 1.05;
  letter-spacing: -0.02em;
  margin-bottom: 28px;
  color: var(--white);
}

.hero-sub {
  font-size: 16px;
  color: var(--muted);
  line-height: 1.7;
  max-width: 520px;
  margin-bottom: 40px;
}

.btn-primary {
  display: inline-block;
  padding: 14px 32px;
  background: var(--accent);
  border: 1px solid var(--accent);
  color: var(--white);
  font-size: 14px;
  font-weight: 500;
  letter-spacing: 0.04em;
  border-radius: 100px;
  transition: background 0.2s, border-color 0.2s;
}
.btn-primary:hover {
  background: #b84a20;
  border-color: #b84a20;
}

/* ── Our Approach ── */
.approach {
  background: var(--bg);
  padding: 120px 0;
}

.approach-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: center;
}

.approach-text h2 {
  font-size: clamp(24px, 3vw, 36px);
  font-weight: 400;
  line-height: 1.3;
  margin-bottom: 28px;
  color: var(--white);
}

.approach-text p {
  font-size: 15px;
  color: var(--muted);
  line-height: 1.8;
}

.approach-image img {
  width: 100%;
  height: 480px;
  object-fit: cover;
  border-radius: 12px;
}

/* ── Services ── */
.services {
  background: var(--bg);
  padding: 100px 0;
  border-top: 1px solid var(--border);
}

.section-title {
  font-size: clamp(28px, 4vw, 44px);
  font-weight: 300;
  letter-spacing: -0.01em;
  margin-bottom: 56px;
  color: var(--white);
}

.services-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.service-card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 36px 32px;
  transition: border-color 0.2s, background 0.2s;
}
.service-card:hover {
  border-color: rgba(255,255,255,0.18);
  background: #1d1d1d;
}

.service-card h3 {
  font-size: 18px;
  font-weight: 500;
  margin-bottom: 14px;
  color: var(--white);
  line-height: 1.3;
}

.service-card p {
  font-size: 14px;
  color: var(--muted);
  line-height: 1.75;
}

/* ── Why Nintai ── */
.why {
  background: var(--bg-alt);
  padding: 120px 0;
}

.why-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: start;
}

.why-images {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.why-img {
  width: 100%;
  aspect-ratio: 3/4;
  object-fit: cover;
  border-radius: 10px;
  filter: grayscale(100%) brightness(0.75);
}

.why-img-2 { margin-top: 48px; }

.why-content h2 {
  font-size: clamp(36px, 5vw, 64px);
  font-weight: 300;
  margin-bottom: 16px;
  color: var(--white);
  letter-spacing: -0.02em;
}

.why-tagline {
  font-size: 14px;
  color: var(--accent);
  letter-spacing: 0.06em;
  margin-bottom: 40px;
}

.why-item {
  padding-bottom: 36px;
  margin-bottom: 36px;
  border-bottom: 1px solid var(--border);
}
.why-item:last-child {
  border-bottom: none;
  padding-bottom: 0;
  margin-bottom: 0;
}

.why-item h3 {
  font-size: 18px;
  font-weight: 500;
  margin-bottom: 10px;
  color: var(--white);
}

.why-item p {
  font-size: 14px;
  color: var(--muted);
  line-height: 1.75;
}

/* ── Contact ── */
.contact {
  background: var(--bg);
  padding: 120px 0;
  border-top: 1px solid var(--border);
}

.contact-inner {
  max-width: 784px;
  margin: 0 auto;
  text-align: center;
}

.contact-inner h2 {
  font-size: clamp(44px, 6vw, 80px);
  font-weight: 300;
  margin-bottom: 24px;
  letter-spacing: -0.02em;
}

.contact-sub {
  font-size: 16px;
  color: var(--muted);
  line-height: 1.7;
  margin-bottom: 56px;
}

.contact-form {
  display: flex;
  flex-direction: column;
  gap: 16px;
  text-align: left;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.contact-form input,
.contact-form textarea {
  width: 100%;
  background: #161616;
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 18px 24px;
  font-family: var(--font);
  font-size: 15px;
  color: var(--white);
  outline: none;
  transition: border-color 0.2s;
  resize: none;
}
.contact-form input::placeholder,
.contact-form textarea::placeholder { color: rgba(255,255,255,0.3); }

.contact-form input:focus,
.contact-form textarea:focus {
  border-color: rgba(255,255,255,0.3);
}

.btn-send {
  width: 100%;
  padding: 18px;
  background: var(--accent);
  color: var(--white);
  border: none;
  border-radius: 100px;
  font-family: var(--font);
  font-size: 15px;
  font-weight: 500;
  letter-spacing: 0.02em;
  cursor: pointer;
  transition: background 0.2s, transform 0.15s;
  margin-top: 8px;
}
.btn-send:hover { background: #b84a20; }
.btn-send:active { transform: scale(0.99); }

.btn-send:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

/* ── Footer ── */
.footer {
  background: #000000;
  border-top: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 36px 48px;
}

.footer-copy {
  font-size: 13px;
  color: rgba(255,255,255,0.35);
}

/* ── Honeypot (spam protection) ── */
#website {
  position: absolute;
  left: -9999px;
  width: 1px;
  height: 1px;
  opacity: 0;
}

/* ── Form success message ── */
.form-success {
  display: none;
  text-align: center;
  padding: 40px;
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 12px;
  color: var(--muted);
  font-size: 16px;
  line-height: 1.7;
}
.form-success.visible { display: block; }

/* ── Responsive ── */
@media (max-width: 960px) {
  .container { padding: 0 32px; }
  .navbar { padding: 18px 32px; }

  .approach-grid,
  .why-grid { grid-template-columns: 1fr; gap: 48px; }

  .approach-image { order: -1; }
  .approach-image img { height: 320px; }

  .services-grid { grid-template-columns: repeat(2, 1fr); }

  .why-images {
    grid-template-columns: 1fr 1fr;
    max-width: 480px;
  }
  .why-img-2 { margin-top: 32px; }
}

@media (max-width: 640px) {
  .container { padding: 0 20px; }
  .navbar { padding: 16px 20px; }

  .nav-links { display: none; }
  .nav-links.open {
    display: flex;
    flex-direction: column;
    gap: 24px;
    position: fixed;
    inset: 0;
    top: 65px;
    background: #000;
    padding: 40px 24px;
    z-index: 99;
  }
  .nav-links.open a { font-size: 22px; }
  .nav-toggle { display: flex; }

  .hero { padding: 0 20px 80px; }
  .hero-content h1 { font-size: 40px; }

  .approach { padding: 80px 0; }
  .services { padding: 80px 0; }
  .services-grid { grid-template-columns: 1fr; }

  .why { padding: 80px 0; }
  .why-images { grid-template-columns: 1fr; max-width: 100%; }
  .why-img-2 { margin-top: 0; }
  .why-img { aspect-ratio: 16/9; }

  .contact { padding: 80px 0; }
  .form-row { grid-template-columns: 1fr; }

  .footer { flex-direction: column; gap: 16px; text-align: center; padding: 32px 20px; }
}