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

:root {
  --color-primary: #1a5276;
  --color-primary-light: #2980b9;
  --color-accent: #27ae60;
  --color-accent-hover: #219a52;
  --color-bg: #ffffff;
  --color-bg-alt: #f8f9fa;
  --color-text: #2c3e50;
  --color-text-light: #6c757d;
  --color-border: #dee2e6;
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --container-max: 1100px;
  --space-xs: 0.5rem;
  --space-sm: 1rem;
  --space-md: 2rem;
  --space-lg: 3rem;
  --space-xl: 5rem;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-sans);
  color: var(--color-text);
  background: var(--color-bg);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

a {
  color: var(--color-primary-light);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

img {
  max-width: 100%;
  height: auto;
}

/* ─── Layout ──────────────────────────────────────────────────── */
.container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--space-md);
}

/* ─── Buttons ─────────────────────────────────────────────────── */
.btn {
  display: inline-block;
  font-weight: 600;
  text-align: center;
  border: 2px solid transparent;
  border-radius: 6px;
  cursor: pointer;
  transition: background-color 0.2s, border-color 0.2s, color 0.2s;
  text-decoration: none;
}

.btn--sm {
  padding: 0.4rem 1rem;
  font-size: 0.9rem;
}

.btn--lg {
  padding: 0.75rem 2rem;
  font-size: 1.1rem;
}

.btn--primary {
  background: var(--color-accent);
  color: #fff;
  border-color: var(--color-accent);
}

.btn--primary:hover {
  background: var(--color-accent-hover);
  border-color: var(--color-accent-hover);
  text-decoration: none;
}

.btn--outline {
  background: transparent;
  color: var(--color-primary);
  border-color: var(--color-primary);
}

.btn--outline:hover {
  background: var(--color-primary);
  color: #fff;
  text-decoration: none;
}

/* ─── Header ──────────────────────────────────────────────────── */
.header {
  background: var(--color-bg);
  border-bottom: 1px solid var(--color-border);
  position: sticky;
  top: 0;
  z-index: 100;
}

.header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}

.header__logo {
  text-decoration: none;
  color: var(--color-primary);
}

.header__logo-text {
  font-size: 1.5rem;
  letter-spacing: -0.5px;
}

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

.header__nav {
  display: flex;
  align-items: center;
  gap: var(--space-md);
}

.header__nav a {
  color: var(--color-text);
  font-weight: 500;
  font-size: 0.95rem;
}

.header__nav a:hover {
  color: var(--color-primary-light);
  text-decoration: none;
}

/* ─── Hero ────────────────────────────────────────────────────── */
.hero {
  background: linear-gradient(135deg, var(--color-primary) 0%, #1a6e5e 100%);
  color: #fff;
  padding: var(--space-xl) 0;
  text-align: center;
}

.hero__title {
  font-size: 2.8rem;
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: var(--space-sm);
}

.hero__subtitle {
  font-size: 1.2rem;
  opacity: 0.9;
  max-width: 650px;
  margin: 0 auto var(--space-lg);
  line-height: 1.7;
}

.hero__actions {
  display: flex;
  gap: var(--space-sm);
  justify-content: center;
  flex-wrap: wrap;
}

.hero .btn--outline {
  color: #fff;
  border-color: rgba(255, 255, 255, 0.6);
}

.hero .btn--outline:hover {
  background: rgba(255, 255, 255, 0.15);
  border-color: #fff;
  color: #fff;
}

/* ─── Section Title ───────────────────────────────────────────── */
.section__title {
  font-size: 2rem;
  font-weight: 700;
  color: var(--color-primary);
  text-align: center;
  margin-bottom: var(--space-lg);
}

/* ─── Features ────────────────────────────────────────────────── */
.features {
  padding: var(--space-xl) 0;
  background: var(--color-bg-alt);
}

.features__grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--space-md);
}

.feature-card {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: 8px;
  padding: var(--space-md);
  transition: box-shadow 0.2s;
}

.feature-card:hover {
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
}

.feature-card__icon {
  font-size: 2rem;
  margin-bottom: var(--space-xs);
}

.feature-card h3 {
  font-size: 1.15rem;
  color: var(--color-primary);
  margin-bottom: var(--space-xs);
}

.feature-card p {
  color: var(--color-text-light);
  font-size: 0.95rem;
  line-height: 1.6;
}

/* ─── About ───────────────────────────────────────────────────── */
.about {
  padding: var(--space-xl) 0;
}

.about__inner {
  max-width: 750px;
  margin: 0 auto;
}

.about__inner p {
  margin-bottom: var(--space-sm);
  font-size: 1.05rem;
  line-height: 1.8;
}

/* ─── Footer ──────────────────────────────────────────────────── */
.footer {
  background: var(--color-primary);
  color: rgba(255, 255, 255, 0.8);
  padding: var(--space-md) 0;
  text-align: center;
  font-size: 0.9rem;
}

.footer__inner p {
  margin-bottom: var(--space-xs);
}

.footer a {
  color: #fff;
  font-weight: 500;
}

/* ─── Responsive ──────────────────────────────────────────────── */
@media (max-width: 768px) {
  .hero__title {
    font-size: 2rem;
  }

  .hero__subtitle {
    font-size: 1rem;
  }

  .header__nav {
    gap: var(--space-sm);
  }

  .features__grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 480px) {
  .header__inner {
    flex-direction: column;
    height: auto;
    padding: var(--space-sm) var(--space-md);
    gap: var(--space-xs);
  }

  .hero {
    padding: var(--space-lg) 0;
  }

  .hero__title {
    font-size: 1.6rem;
  }
}