/* assets/css/style.css */
@import url('https://fonts.googleapis.com/css2?family=Poppins:wght@400;500;600;700&display=swap');

:root {
  --color-primary: #1A237E;
  --color-secondary: #0D47A1;
  --color-accent: #FF6F00;
  --color-light-bg: #E8EAF6;
  --color-text-dark: #212121;
  --color-text-medium: #424242;
  --color-text-light: #757575;
  --color-white: #FFFFFF;
  --color-footer-bg: #0D0D0D;
  --font-primary: 'Poppins', sans-serif;
  --font-size-base: 16px;
  --font-size-h1: clamp(2rem, 5vw, 3.5rem);
  --font-size-h2: clamp(1.5rem, 3vw, 2.25rem);
  --font-size-h3: clamp(1.1rem, 2vw, 1.5rem);
  --line-height-body: 1.7;
  --section-padding: 80px 0;
  --card-padding: 24px;
  --border-radius: 8px;
  --border-radius-lg: 16px;
  --shadow-sm: 0 2px 8px rgba(0,0,0,0.08);
  --shadow-md: 0 4px 20px rgba(0,0,0,0.12);
  --shadow-lg: 0 8px 40px rgba(0,0,0,0.16);
  --transition: all 0.3s ease;
  --focus-ring: 2px solid var(--color-accent);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font-primary);
  font-size: var(--font-size-base);
  line-height: var(--line-height-body);
  color: var(--color-text-dark);
  background: var(--color-white);
  margin: 0;
}
img { max-width: 100%; display: block; }
a { color: var(--color-secondary); text-decoration: none; transition: var(--transition); }
a:hover { color: var(--color-primary); }
a:focus-visible,
button:focus-visible,
input:focus-visible,
select:focus-visible,
textarea:focus-visible {
  outline: var(--focus-ring);
  outline-offset: 2px;
}
h1, h2, h3, h4, h5, h6 { font-weight: 700; color: var(--color-text-dark); }
h1 { font-size: var(--font-size-h1); }
h2 { font-size: var(--font-size-h2); }
h3 { font-size: var(--font-size-h3); }
.section-padding { padding: var(--section-padding); }
.section-title {
  position: relative;
  text-align: center;
  margin-bottom: 2.5rem;
  padding-bottom: 1rem;
}
.section-title::after {
  content: '';
  position: absolute;
  left: 50%;
  bottom: 0;
  transform: translateX(-50%);
  width: 88px;
  height: 4px;
  border-radius: 999px;
  background: var(--color-accent);
}
.section-title.text-start::after { left: 0; transform: none; }
.btn { font-weight: 600; transition: var(--transition); }
.btn-primary {
  background: var(--color-primary);
  border-color: var(--color-primary);
}
.btn-primary:hover,
.btn-primary:focus-visible { background: var(--color-secondary); border-color: var(--color-secondary); }
.btn-warning { background: var(--color-accent); border-color: var(--color-accent); color: var(--color-white); }
.btn-warning:hover { color: var(--color-white); filter: brightness(0.95); }
.btn-outline-light:hover { color: var(--color-primary); }
.skip-link {
  display: none !important;
  position: absolute;
  top: -48px;
  left: 1rem;
  z-index: 10000;
  background: var(--color-white);
  color: var(--color-primary);
  padding: 0.75rem 1rem;
  border-radius: var(--border-radius);
  box-shadow: var(--shadow-sm);
}
.skip-link:focus { display: none !important; top: 1rem; }
.navbar { transition: var(--transition); }
.navbar .nav-link { color: var(--color-text-dark); font-weight: 500; }
.navbar .nav-link.active { color: var(--color-primary); font-weight: 700; text-decoration: underline; text-underline-offset: 0.35rem; }
.navbar-brand__logo {
  width: 44px;
  height: 44px;
  object-fit: cover;
  border-radius: 50%;
  border: 2px solid rgba(255, 255, 255, 0.9);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.18);
}
.navbar-brand__text { font-weight: 700; color: var(--color-primary); letter-spacing: 0.02em; }
.navbar-brand__icon { color: var(--color-accent); }
.navbar-call-btn { min-height: 44px; }