:root {
  --page-bg: #edf2f5;
  --panel-bg: #f3f3f3;
  --card-bg: #f8f8f8;
  --section-bg: #f2f2f2;
  --text: #1f2937;
  --muted: #5c6572;
  --heading: #111827;
  --banner: #f6c60a;
  --button: #1f6fe5;
  --button-dark: #1459c4;
  --footer: #1e2d3d;
  --footer-text: rgba(255, 255, 255, 0.82);
  --border: rgba(17, 24, 39, 0.08);
  --shadow: 0 10px 24px rgba(15, 23, 42, 0.08);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: Arial, Helvetica, sans-serif;
  background: var(--page-bg);
  color: var(--text);
}

img {
  display: block;
  max-width: 100%;
}

button {
  font: inherit;
}

.container {
  width: min(1120px, calc(100% - 32px));
  margin: 0 auto;
}

.construction-banner {
  background: var(--banner);
  color: #111827;
  text-align: center;
  font-size: 0.92rem;
  font-weight: 700;
  letter-spacing: 0.01em;
  padding: 10px 18px;
  box-shadow: 0 2px 0 rgba(0, 0, 0, 0.06);
}

.hero {
  background: rgba(255, 255, 255, 0.02);
  padding: 30px 0 36px;
}

.hero-inner {
  text-align: center;
  padding-top: 8px;
}

.hero h1 {
  margin: 0;
  font-size: clamp(2.5rem, 4vw, 4rem);
  line-height: 1.1;
  letter-spacing: -0.05em;
  font-weight: 800;
  color: var(--heading);
}

.hero p {
  margin: 18px 0 0;
  font-size: 1.1rem;
  line-height: 1.6;
  color: var(--muted);
}

.primary-btn,
.secondary-btn {
  border: none;
  border-radius: 8px;
  cursor: pointer;
  font-weight: 700;
  transition: transform 0.18s ease, background 0.18s ease;
}

.primary-btn {
  margin-top: 26px;
  background: var(--button);
  color: white;
  padding: 10px 20px;
  min-width: 110px;
  box-shadow: 0 8px 18px rgba(18, 88, 194, 0.25);
}

.primary-btn:hover,
.secondary-btn:hover {
  transform: translateY(-1px);
}

.primary-btn:hover {
  background: var(--button-dark);
}

.features-section {
  padding: 18px 0 0;
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 24px;
  padding-bottom: 30px;
}

.feature-card {
  background: #f9f9f9;
  border: 1px solid var(--border);
  border-radius: 14px;
  overflow: hidden;
  box-shadow: 0 2px 8px rgba(15, 23, 42, 0.03);
}

.feature-card img {
  width: 100%;
  height: 170px;
  object-fit: cover;
}

.feature-text {
  padding: 16px 18px 18px;
}

.feature-text h3 {
  margin: 0;
  font-size: 1.05rem;
  line-height: 1.3;
  color: var(--heading);
}

.feature-text p {
  margin: 10px 0 0;
  color: var(--muted);
  font-size: 0.96rem;
  line-height: 1.55;
}

.about-section {
  padding: 28px 0 42px;
}

.about-grid {
  display: grid;
  grid-template-columns: 1.15fr 1fr;
  align-items: center;
  gap: 32px;
  background: rgba(255, 255, 255, 0.14);
}

.about-visual img {
  width: 100%;
  height: 310px;
  object-fit: cover;
  border-radius: 18px;
  box-shadow: var(--shadow);
}

.about-copy {
  padding: 6px 4px 6px 0;
}

.about-copy h2 {
  margin: 0;
  font-size: clamp(2rem, 4vw, 3rem);
  line-height: 1.1;
  letter-spacing: -0.04em;
  color: var(--heading);
}

.about-copy p {
  margin: 20px 0 0;
  color: var(--muted);
  line-height: 1.7;
  font-size: 1.02rem;
}

.secondary-btn {
  margin-top: 24px;
  background: transparent;
  color: var(--text);
  border: 1px solid rgba(17, 24, 39, 0.2);
  padding: 10px 16px;
}

.site-footer {
  background: var(--footer);
  color: white;
  padding-top: 32px;
}

.footer-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 26px;
  padding-bottom: 18px;
}

.footer-grid h3 {
  margin: 0 0 14px;
  font-size: 1.06rem;
  color: white;
  font-weight: 700;
}

.footer-grid ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 8px;
  color: var(--footer-text);
  line-height: 1.5;
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.12);
  text-align: center;
  padding: 16px 18px 18px;
  color: rgba(255, 255, 255, 0.8);
  font-size: 0.95rem;
}

.toast {
  position: fixed;
  right: 20px;
  bottom: 20px;
  background: #111827;
  color: white;
  padding: 14px 18px;
  border-radius: 12px;
  box-shadow: 0 20px 35px rgba(17, 24, 39, 0.28);
  opacity: 0;
  pointer-events: none;
  transform: translateY(12px);
  transition: opacity 0.2s ease, transform 0.2s ease;
  z-index: 50;
  max-width: 300px;
}

.toast.show {
  opacity: 1;
  transform: translateY(0);
}

.toast-title {
  font-weight: 700;
  margin-bottom: 4px;
}

@media (max-width: 900px) {
  .feature-grid,
  .about-grid,
  .footer-grid {
    grid-template-columns: 1fr;
  }

  .about-copy {
    padding: 0;
  }
}

@media (max-width: 540px) {
  .hero {
    padding-top: 18px;
  }

  .hero h1 {
    line-height: 1.15;
  }

  .feature-card img {
    height: 220px;
  }

  .about-visual img {
    height: 260px;
  }
}