@import url('https://fonts.googleapis.com/css2?family=Montserrat:wght@300;400;600;700;800&family=Roboto:wght@300;400;500&display=swap');

:root {
  --color-primary-blue-dark: #003451;
  --color-primary-blue-light: #008AC1;
  --color-primary-green-dark: #006532;
  --color-primary-green-light: #56BF35;
  --color-primary-yellow: #CEE210;
  --color-neutral-white: #ffffff;
  --color-neutral-light: #F5F9FB;
  --color-neutral-mid: #A7B3BC;
  --color-neutral-dark: #4A4F55;
  --color-neutral-black: #000000;
  --color-success: #56BF35;
  --color-warning: #CEE210;
  --color-error: #D9534F;

  --font-family-primary: 'Montserrat', system-ui, sans-serif;
  --font-family-secondary: 'Roboto', system-ui, sans-serif;
  --font-size-xs: 12px;
  --font-size-sm: 14px;
  --font-size-md: 16px;
  --font-size-lg: 20px;
  --font-size-xl: 24px;
  --font-size-xxl: 32px;
  --font-size-hero: 56px;
  --font-weight-light: 300;
  --font-weight-regular: 400;
  --font-weight-semibold: 600;
  --font-weight-bold: 700;
  --font-weight-extrabold: 800;

  --space-xs: 4px;
  --space-sm: 8px;
  --space-md: 16px;
  --space-lg: 24px;
  --space-xl: 32px;
  --space-xxl: 48px;
  --space-section: 100px;

  --radius-sm: 4px;
  --radius-md: 6px;
  --radius-lg: 8px;
  --radius-full: 999px;

  --shadow-light: 0 2px 4px rgba(0,0,0,0.06);
  --shadow-medium: 0 4px 12px rgba(0,0,0,0.08);
  --shadow-strong: 0 8px 24px rgba(0,0,0,0.12);

  --max-width: 1200px;
  --header-height: 80px;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; }

body {
  font-family: var(--font-family-primary);
  font-size: var(--font-size-md);
  color: var(--color-neutral-dark);
  background: var(--color-neutral-white);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

/* ── TYPOGRAPHY ── */
h1, h2, h3, h4 { color: var(--color-primary-blue-dark); font-weight: var(--font-weight-bold); line-height: 1.2; }
h1 { font-size: var(--font-size-hero); font-weight: var(--font-weight-extrabold); }
h2 { font-size: var(--font-size-xxl); }
h3 { font-size: var(--font-size-xl); color: var(--color-primary-green-dark); }
h4 { font-size: 20px; }
p { margin-bottom: var(--space-md); line-height: 1.7; }
a { color: var(--color-primary-blue-light); text-decoration: none; }
a:hover { text-decoration: underline; }

/* ── LAYOUT ── */
.container { max-width: var(--max-width); margin: 0 auto; padding: 0 80px; }
.section { padding: var(--space-section) 0; }
.section--alt { background: var(--color-neutral-light); }
.section__header { text-align: center; margin-bottom: 56px; }
.section__header h2 { margin-bottom: 16px; }
.section__header p { font-size: var(--font-size-lg); color: var(--color-neutral-mid); max-width: 600px; margin: 0 auto; }
.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-xl); }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-xl); }
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: var(--space-lg); }

/* ── BUTTONS ── */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 14px 28px; border-radius: var(--radius-md);
  font-family: var(--font-family-primary); font-size: var(--font-size-md);
  font-weight: var(--font-weight-semibold); border: 2px solid transparent;
  cursor: pointer; transition: all 0.2s ease; white-space: nowrap;
  text-decoration: none;
}
.btn--primary { background: var(--color-primary-blue-light); color: #fff; box-shadow: var(--shadow-light); }
.btn--primary:hover { background: var(--color-primary-blue-dark); text-decoration: none; color: #fff; }
.btn--secondary { background: transparent; color: var(--color-primary-blue-light); border-color: var(--color-primary-blue-light); }
.btn--secondary:hover { background: rgba(0,138,193,0.08); text-decoration: none; }
.btn--white { background: #fff; color: var(--color-primary-blue-dark); }
.btn--white:hover { background: var(--color-neutral-light); text-decoration: none; }

/* ── CARDS ── */
.card {
  background: #fff; border-radius: var(--radius-lg);
  box-shadow: var(--shadow-light); padding: var(--space-xl);
  transition: box-shadow 0.2s ease, transform 0.2s ease;
}
.card:hover { box-shadow: var(--shadow-medium); transform: translateY(-2px); }
.card__icon { width: 48px; height: 48px; margin-bottom: var(--space-md); color: var(--color-primary-green-dark); }
.card__title { font-size: var(--font-size-xl); font-weight: var(--font-weight-semibold); color: var(--color-primary-blue-dark); margin-bottom: var(--space-sm); }
.card__subtitle { font-size: var(--font-size-md); color: var(--color-primary-green-dark); margin-bottom: var(--space-md); }
.card--tech { border-left: 4px solid var(--color-primary-green-dark); }
.card--institution { border-left: 4px solid var(--color-primary-blue-dark); }
.card--data { border-left: 4px solid var(--color-primary-yellow); }
.card--yellow-accent { border-top: 4px solid var(--color-primary-yellow); }

/* ── HEADER ── */
.header {
  position: sticky; top: 0; z-index: 100;
  background: rgba(255,255,255,0.97); backdrop-filter: blur(8px);
  border-bottom: 1px solid rgba(0,52,81,0.08);
  height: var(--header-height);
}
.header__inner {
  max-width: var(--max-width); margin: 0 auto; padding: 0 80px;
  height: 100%; display: flex; align-items: center; justify-content: space-between;
}
.header__logo {
  font-size: 22px; font-weight: var(--font-weight-extrabold);
  color: var(--color-primary-blue-dark); text-decoration: none;
  display: flex; align-items: center; gap: 10px;
}
.header__logo-dot { width: 10px; height: 10px; background: var(--color-primary-green-light); border-radius: 50%; display: inline-block; }
.header__nav { display: flex; align-items: center; gap: 32px; }
.header__nav a {
  font-size: var(--font-size-sm); font-weight: var(--font-weight-semibold);
  color: var(--color-primary-blue-dark); text-decoration: none;
  transition: color 0.2s ease; position: relative; padding-bottom: 2px;
}
.header__nav a::after {
  content: ''; position: absolute; bottom: 0; left: 0; width: 0; height: 2px;
  background: var(--color-primary-blue-light); transition: width 0.2s ease;
}
.header__nav a:hover { color: var(--color-primary-blue-light); }
.header__nav a:hover::after, .header__nav a.active::after { width: 100%; }
.header__nav a.active { color: var(--color-primary-blue-light); }
.burger { display: none; flex-direction: column; gap: 5px; cursor: pointer; background: none; border: none; padding: 4px; z-index: 10001; }
.burger span { display: block; width: 24px; height: 2px; background: var(--color-primary-blue-dark); transition: all 0.3s ease; border-radius: 2px; }
.burger.active span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.burger.active span:nth-child(2) { opacity: 0; }
.burger.active span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ── MOBILE SIDEBAR ── */
.sidebar-overlay {
  display: none; position: fixed; inset: 0; background: rgba(0,52,81,0.45);
  z-index: 99; opacity: 0; transition: opacity 0.3s ease;
}
.sidebar-overlay.visible { display: block; opacity: 1; }

/* ── FOOTER ── */
.footer { background: var(--color-primary-blue-dark); color: #fff; padding: 64px 0 32px; }
.footer__grid { display: grid; grid-template-columns: 2fr 1fr 1fr; gap: 48px; margin-bottom: 48px; }
.footer__brand { font-size: 20px; font-weight: var(--font-weight-extrabold); margin-bottom: 16px; display: flex; align-items: center; gap: 8px; }
.footer p { color: rgba(255,255,255,0.7); font-size: var(--font-size-sm); }
.footer h4 { font-size: var(--font-size-sm); font-weight: var(--font-weight-semibold); letter-spacing: 0.08em; text-transform: uppercase; color: rgba(255,255,255,0.5); margin-bottom: 16px; }
.footer__links { list-style: none; display: flex; flex-direction: column; gap: 10px; }
.footer__links a { color: var(--color-primary-yellow); font-size: var(--font-size-sm); text-decoration: none; transition: color 0.2s; }
.footer__links a:hover { color: #fff; }
.footer__bottom { border-top: 1px solid rgba(255,255,255,0.1); padding-top: 24px; display: flex; justify-content: space-between; align-items: center; }
.footer__bottom p { margin: 0; font-size: var(--font-size-xs); color: rgba(255,255,255,0.4); }

/* ── FORMS ── */
.form-field { display: flex; flex-direction: column; gap: 6px; margin-bottom: var(--space-md); }
.form-field label { font-size: var(--font-size-sm); font-weight: var(--font-weight-semibold); color: var(--color-neutral-dark); }
.input, textarea, select {
  padding: 12px 14px; border-radius: var(--radius-md);
  border: 1.5px solid var(--color-neutral-mid);
  font-family: var(--font-family-primary); font-size: var(--font-size-md);
  color: var(--color-primary-blue-dark); background: #fff;
  transition: border-color 0.2s, box-shadow 0.2s; width: 100%;
}
.input:focus, textarea:focus, select:focus {
  outline: none; border-color: var(--color-primary-blue-light);
  box-shadow: 0 0 0 3px rgba(0,138,193,0.12);
}
textarea { resize: vertical; min-height: 120px; }
.input::placeholder, textarea::placeholder { color: var(--color-neutral-mid); }

/* ── BADGE ── */
.badge {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 6px 14px; border-radius: var(--radius-full);
  font-size: var(--font-size-xs); font-weight: var(--font-weight-semibold);
  letter-spacing: 0.06em; text-transform: uppercase;
}
.badge--green { background: rgba(86,191,53,0.12); color: var(--color-primary-green-dark); }
.badge--blue { background: rgba(0,138,193,0.12); color: var(--color-primary-blue-light); }
.badge--yellow { background: rgba(206,226,16,0.18); color: #8a9700; }

/* ── TAG PILL ── */
.tag { display: inline-flex; align-items: center; padding: 4px 12px; border-radius: var(--radius-full); background: var(--color-neutral-light); font-size: var(--font-size-xs); color: var(--color-neutral-dark); font-weight: var(--font-weight-semibold); }

/* ── DIVIDER ── */
.divider { border: none; border-top: 1px solid rgba(0,52,81,0.08); margin: var(--space-xl) 0; }

/* ── STAT BLOCK ── */
.stat { text-align: center; padding: var(--space-xl); }
.stat__number { font-size: 40px; font-weight: var(--font-weight-extrabold); color: var(--color-primary-blue-dark); line-height: 1; margin-bottom: 8px; }
.stat__label { font-size: var(--font-size-sm); color: var(--color-neutral-mid); }

/* ── PAGE HERO ── */
.page-hero {
  background: var(--color-primary-blue-dark);
  padding: 72px 0; color: #fff;
}
.page-hero h1 { color: #fff; font-size: 48px; margin-bottom: 16px; }
.page-hero p { color: rgba(255,255,255,0.75); font-size: var(--font-size-lg); max-width: 640px; margin: 0; }

/* ── ICON SVG ── */
.icon { display: block; }

/* ── LIST ── */
.check-list { list-style: none; display: flex; flex-direction: column; gap: 10px; }
.check-list li { display: flex; align-items: flex-start; gap: 10px; font-size: var(--font-size-md); color: var(--color-neutral-dark); }
.check-list li::before { content: ''; display: inline-block; width: 20px; height: 20px; min-width: 20px; background: var(--color-primary-green-light); border-radius: 50%; background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 20 20' fill='white'%3E%3Cpath fill-rule='evenodd' d='M16.707 5.293a1 1 0 00-1.414 0L8 12.586 4.707 9.293a1 1 0 00-1.414 1.414l4 4a1 1 0 001.414 0l8-8a1 1 0 000-1.414z'/%3E%3C/svg%3E"); background-size: 12px; background-repeat: no-repeat; background-position: center; margin-top: 2px; }

/* ── ANIMATION ── */
@keyframes fadeUp { from { opacity: 0; transform: translateY(20px); } to { opacity: 1; transform: translateY(0); } }
.fade-up { animation: fadeUp 0.6s ease both; }
.fade-up--delay-1 { animation-delay: 0.1s; }
.fade-up--delay-2 { animation-delay: 0.2s; }
.fade-up--delay-3 { animation-delay: 0.3s; }

/* ── RESPONSIVE ── */
@media (max-width: 1024px) {
  .container { padding: 0 40px; }
  .header__inner { padding: 0 40px; }
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 768px) {
  :root { --font-size-hero: 36px; --font-size-xxl: 26px; --font-size-xl: 20px; --space-section: 64px; }
  .container { padding: 0 20px; }
  .header { backdrop-filter: none; }
  .header__inner { padding: 0 20px; }
  .header__nav {
    display: flex; flex-direction: column;
    position: fixed; top: 0; right: 0; bottom: 0;
    width: 280px; max-width: 80vw;
    background: var(--color-neutral-white);
    padding: 0; gap: 0;
    z-index: 10000;
    box-shadow: -4px 0 24px rgba(0,0,0,0.15);
    transform: translateX(100%);
    transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    overflow-y: auto;
  }
  .header__nav.open { transform: translateX(0); }

  .header__nav::before {
    content: ''; display: block;
    padding: 28px 28px 20px;
    border-bottom: 1px solid rgba(0,52,81,0.08);
    font-size: 20px; font-weight: var(--font-weight-extrabold);
    color: var(--color-primary-blue-dark);
  }

  .header__nav a {
    display: flex; align-items: center;
    padding: 14px 28px;
    font-size: var(--font-size-md); font-weight: var(--font-weight-semibold);
    color: var(--color-primary-blue-dark);
    border-left: 3px solid transparent;
    transition: all 0.2s ease;
  }
  .header__nav a::after { display: none; }
  .header__nav a:hover,
  .header__nav a:focus {
    background: var(--color-neutral-light);
    color: var(--color-primary-blue-light);
    border-left-color: var(--color-primary-blue-light);
  }
  .header__nav a.active {
    background: var(--color-neutral-light);
    color: var(--color-primary-blue-light);
    border-left-color: var(--color-primary-blue-light);
  }

  .header__nav .btn--secondary {
    margin: 16px 24px 0; padding: 12px 18px !important;
    font-size: var(--font-size-sm) !important;
    text-align: center; justify-content: center;
    border-left: none;
    border-radius: var(--radius-md);
  }
  .header__nav .btn--secondary:hover { border-left: none; }

  .burger { display: flex; }
  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
  .footer__grid { grid-template-columns: 1fr; gap: 32px; }
  .footer__bottom { flex-direction: column; gap: 8px; text-align: center; }
}