:root {
  --container-max: 1240px;
  --radius-xs: 8px;
  --radius-sm: 12px;
  --radius-md: 16px;
  --radius-lg: 22px;
  --shadow-xs: 0 2px 8px rgba(16, 38, 30, 0.08);
  --shadow-sm: 0 8px 20px rgba(16, 38, 30, 0.1);
  --shadow-md: 0 16px 30px rgba(16, 38, 30, 0.14);

  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-5: 20px;
  --space-6: 24px;
  --space-7: 32px;
  --space-8: 40px;

  --font-base: "Open Sans", "Segoe UI", sans-serif;
  --font-heading: "Montserrat", "Segoe UI", sans-serif;
  --font-size-100: 0.875rem;
  --font-size-200: 1rem;
  --font-size-300: 1.125rem;
  --font-size-400: clamp(1.35rem, 2vw, 1.8rem);
  --font-size-500: clamp(1.8rem, 3vw, 2.5rem);

  --color-bg: #f4f7f6;
  --color-surface: #ffffff;
  --color-text: #143328;
  --color-muted: #557067;
  --color-border: #d4e2dc;
  --color-primary: #1f5f49;
  --color-primary-strong: #174937;
  --color-primary-soft: #e7f2ed;
  --color-accent: #3c8c6d;
  --color-link: #1f5f49;
  --color-link-hover: #102c23;
  --color-focus: #0b57d0;
}

html {
  scroll-behavior: smooth;
}

body {
  background: var(--color-bg);
  color: var(--color-text);
  font-family: var(--font-base);
  font-size: var(--font-size-200);
  line-height: 1.6;
}

.container,
.ph-container {
  width: min(100% - 2rem, var(--container-max));
  max-width: var(--container-max);
}

h1,
h2,
h3,
h4,
h5,
h6 {
  color: var(--color-text);
  font-family: var(--font-heading);
  line-height: 1.25;
  margin-bottom: var(--space-3);
  text-wrap: balance;
}

h1 { font-size: var(--font-size-500); }
h2 { font-size: var(--font-size-400); }
h3 { font-size: var(--font-size-300); }

p {
  color: var(--color-muted);
}

a {
  color: var(--color-link);
  text-decoration-thickness: 1px;
  text-underline-offset: 2px;
}

a:hover {
  color: var(--color-link-hover);
}

:focus-visible {
  outline: 3px solid var(--color-focus);
  outline-offset: 2px;
}

.ph-btn,
.btn-primary,
.btn-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: var(--font-size-100);
  letter-spacing: 0.03em;
  text-transform: uppercase;
  text-decoration: none;
  cursor: pointer;
  transition: transform 0.2s ease, box-shadow 0.2s ease, background-color 0.2s ease, color 0.2s ease;
}

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

.ph-btn--primary:hover,
.btn-primary:hover {
  background: var(--color-primary-strong);
  border-color: var(--color-primary-strong);
  color: #fff;
  transform: translateY(-1px);
}

.ph-btn--secondary,
.btn-secondary {
  background: var(--color-surface);
  border-color: var(--color-border);
  color: var(--color-primary);
}

.ph-btn--secondary:hover,
.btn-secondary:hover {
  background: var(--color-primary-soft);
  border-color: #b8d3c7;
  color: var(--color-link-hover);
  transform: translateY(-1px);
}

.card,
.ph-card {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-surface);
  box-shadow: var(--shadow-xs);
  overflow: hidden;
  transition: transform 0.24s ease, box-shadow 0.24s ease, border-color 0.24s ease;
}

@media (hover: hover) and (pointer: fine) {
  .card:hover,
  .ph-card:hover {
    border-color: #b6d1c4;
    box-shadow: var(--shadow-sm);
    transform: translateY(-2px);
  }
}