/* Google Fonts import for premium typography */
@import url('https://fonts.googleapis.com/css2?family=Open+Sans:wght@400;500;600&family=Poppins:wght@500;600;700&display=swap');

:root {
  /* Brand colors */
  --primary-color: #2C5F7C;
  --primary-100: #E6EEF4;
  --primary-700: #1F465A;
  --secondary-color: #45A049;
  --secondary-100: #E8F5EA;
  --accent-color: #FF6B35;
  --accent-100: #FFE3D5;
  --slate-900: #0F1B25;
  --text-dark: #1A1A1A;
  --text-light: #666666;
  --background-light: #F8F9FA;
  --white: #FFFFFF;

  /* Support colors */
  --info-color: #2F86C5;
  --success-color: #4CAF70;
  --warning-color: #FFB347;

  /* Typography */
  --font-heading: 'Poppins', sans-serif;
  --font-body: 'Open Sans', sans-serif;
  --fs-h1: clamp(2.5rem, 5vw, 3.5rem);
  --fs-h2: clamp(2rem, 4vw, 2.75rem);
  --fs-h3: clamp(1.5rem, 3vw, 2rem);
  --fs-body-lg: 1.125rem;
  --fs-body: 1rem;
  --fs-small: 0.875rem;
  --lh-heading: 1.2;
  --lh-body: 1.6;

  /* Spacing */
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 2rem;
  --spacing-lg: 4rem;
  --spacing-xl: 6rem;
  --section-padding-mobile: 4rem;
  --section-padding-desktop: 6rem;
  --grid-gap: 1.5rem;

  /* Layout */
  --container-sm: 640px;
  --container-md: 960px;
  --container-lg: 1200px;
  --container-xl: 1440px;

  /* Effects */
  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-pill: 999px;
  --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.1);
  --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 30px rgba(0, 0, 0, 0.15);
  --transition-base: 200ms ease;
}

/* Base reset */
*, *::before, *::after {
  box-sizing: border-box;
}

* {
  margin: 0;
  padding: 0;
}

html {
  font-size: 100%;
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-body);
  font-size: var(--fs-body);
  line-height: var(--lh-body);
  color: var(--text-dark);
  background-color: var(--background-light);
  -webkit-font-smoothing: antialiased;
}

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

a {
  color: inherit;
  text-decoration: none;
  transition: color var(--transition-base), opacity var(--transition-base);
}

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

ul, ol {
  list-style: none;
}

button, input, textarea, select {
  font: inherit;
  color: inherit;
}

button {
  border: none;
  background: none;
  cursor: pointer;
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  line-height: var(--lh-heading);
  color: var(--slate-900);
  margin-bottom: var(--spacing-sm);
}

h1 { font-size: var(--fs-h1); }
h2 { font-size: var(--fs-h2); }
h3 { font-size: var(--fs-h3); }

p {
  margin-bottom: var(--spacing-sm);
  color: var(--text-light);
}

strong {
  color: var(--text-dark);
}

/* Accessibility helpers */
.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.skip-link {
  position: absolute;
  top: -100%;
  left: 1rem;
  padding: 0.75rem 1.5rem;
  background-color: var(--primary-color);
  color: var(--white);
  border-radius: var(--radius-pill);
  box-shadow: var(--shadow-md);
  transition: top var(--transition-base);
  z-index: 1000;
}

.skip-link:focus {
  top: 1rem;
}

/* Header and navigation */
.site-header {
  position: sticky;
  top: 0;
  z-index: 999;
  background-color: var(--white);
  border-bottom: 1px solid transparent;
  transition: box-shadow var(--transition-base), border-color var(--transition-base), transform var(--transition-base);
}

.site-header.is-scrolled {
  box-shadow: var(--shadow-sm);
  border-bottom-color: rgba(15, 27, 37, 0.08);
}

.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--spacing-sm);
  padding: 0.75rem 0;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  font-family: var(--font-heading);
  font-weight: 600;
  letter-spacing: 0.02em;
  color: var(--slate-900);
}

.brand__logo {
  width: 52px;
  height: auto;
}

.brand__text {
  font-size: 1.05rem;
}

.brand--footer .brand__text {
  color: var(--white);
}

.nav-toggle {
  display: inline-flex;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  border-radius: var(--radius-pill);
  border: 1px solid rgba(44, 95, 124, 0.2);
  padding: 0.5rem;
  background-color: var(--white);
  transition: background-color var(--transition-base), border-color var(--transition-base);
}

.nav-toggle:hover {
  border-color: rgba(44, 95, 124, 0.4);
}

.nav-toggle__bar {
  width: 100%;
  height: 2px;
  background-color: var(--slate-900);
  border-radius: 2px;
}

.primary-nav {
  position: absolute;
  inset: 100% 0 auto 0;
  background-color: var(--white);
  box-shadow: var(--shadow-md);
  opacity: 0;
  visibility: hidden;
  transform: translateY(-10px);
  transition: opacity var(--transition-base), visibility var(--transition-base), transform var(--transition-base);
}

.primary-nav.is-open {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.primary-nav__list {
  display: grid;
  gap: var(--spacing-sm);
  padding: var(--spacing-md);
}

.primary-nav__item--cta .btn {
  width: 100%;
}

.primary-nav__link,
.primary-nav__sublink {
  font-family: var(--font-heading);
  font-weight: 500;
  color: var(--slate-900);
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.35rem 0;
  transition: color var(--transition-base), background-color var(--transition-base);
}

.primary-nav__link:hover,
.primary-nav__sublink:hover {
  color: var(--primary-color);
}

.primary-nav__link.is-active,
.primary-nav__sublink.is-active {
  color: var(--primary-color);
  font-weight: 600;
}

.primary-nav__item--has-children {
  position: relative;
}

.primary-nav__submenu {
  display: grid;
  gap: var(--spacing-xs);
  padding: var(--spacing-sm);
  margin-top: var(--spacing-xs);
  background-color: var(--primary-100);
  border-radius: var(--radius-sm);
}

.primary-nav__submenu a {
  font-size: 0.95rem;
}

body.nav-open {
  overflow: hidden;
}

/* Footer */
.site-footer {
  background-color: var(--slate-900);
  color: rgba(255, 255, 255, 0.85);
  margin-top: var(--spacing-lg);
}

.site-footer__top {
  padding: var(--spacing-lg) 0;
}

.site-footer__grid {
  display: grid;
  gap: var(--spacing-lg);
}

.site-footer__column {
  display: grid;
  gap: var(--spacing-sm);
}

.site-footer__heading {
  font-size: 1.1rem;
  color: var(--white);
  margin-bottom: var(--spacing-xs);
}

.site-footer__tagline,
.site-footer__since {
  color: rgba(255, 255, 255, 0.7);
}

.site-footer__list {
  display: grid;
  gap: 0.6rem;
}

.site-footer__list a {
  color: rgba(255, 255, 255, 0.75);
  transition: color var(--transition-base), transform var(--transition-base);
}

.site-footer__list a:hover {
  color: var(--accent-color);
  transform: translateX(4px);
}

.site-footer__list--contact {
  gap: 0.75rem;
}

.site-footer__label {
  font-weight: 600;
  color: var(--white);
}

.site-footer__social {
  display: grid;
  gap: var(--spacing-xs);
}

.site-footer__social-list {
  display: flex;
  gap: var(--spacing-sm);
}

.site-footer__social-list a {
  color: rgba(255, 255, 255, 0.75);
}

.site-footer__bar {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  background: linear-gradient(90deg, rgba(44, 95, 124, 0.8), rgba(15, 27, 37, 0.9));
  padding: var(--spacing-sm) 0;
}

.site-footer__bar-inner {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  color: rgba(255, 255, 255, 0.7);
  font-size: 0.95rem;
  text-align: center;
}

/* Utility classes */
.container {
  width: min(100% - 2rem, var(--container-lg));
  margin-inline: auto;
}

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

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

.section {
  padding: var(--section-padding-mobile) 0;
}

.section--alt {
  background-color: var(--white);
}

.text-center {
  text-align: center;
}

.lead {
  font-size: var(--fs-body-lg);
  color: var(--text-dark);
}

.text-muted {
  color: var(--text-light);
}

.shadow-sm { box-shadow: var(--shadow-sm); }
.shadow-md { box-shadow: var(--shadow-md); }
.shadow-lg { box-shadow: var(--shadow-lg); }

/* Grid helpers */
.grid {
  display: grid;
  gap: var(--grid-gap);
}

.grid--cols-2 {
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
}

.grid--cols-3 {
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
}

.grid--cols-4 {
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
}

.flex {
  display: flex;
  gap: var(--grid-gap);
}

.flex--wrap {
  flex-wrap: wrap;
}

.flex--center {
  align-items: center;
  justify-content: center;
}

.stack > * + * {
  margin-top: var(--spacing-sm);
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.75rem 1.75rem;
  border-radius: var(--radius-pill);
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: 0.95rem;
  line-height: 1;
  transition: background-color var(--transition-base), color var(--transition-base), box-shadow var(--transition-base), transform var(--transition-base);
  border: 1px solid transparent;
}

.btn:focus-visible {
  outline: 3px solid rgba(44, 95, 124, 0.3);
  outline-offset: 3px;
}

.btn--primary {
  background-color: var(--primary-color);
  color: var(--white);
  box-shadow: var(--shadow-md);
}

.btn--primary:hover {
  background-color: var(--primary-700);
  transform: translateY(-2px);
}

.btn--link:hover {
  text-decoration: none;
}

.alert {
  border-radius: var(--radius-md);
  padding: var(--spacing-sm);
  font-weight: 600;
}

.alert--success {
  background: rgba(69, 160, 73, 0.12);
  color: var(--primary-color);
}

.alert--error {
  background: rgba(219, 68, 83, 0.12);
  color: #db4453;
}

.form-error {
  display: block;
  margin-top: 0.25rem;
  font-size: 0.85rem;
  color: #db4453;
}

.form-control--error {
  border-color: #db4453;
  box-shadow: 0 0 0 1px rgba(219, 68, 83, 0.15);
}

.btn--secondary {
  background-color: var(--secondary-color);
  color: var(--white);
}

.btn--secondary:hover {
  background-color: #398A3F;
  transform: translateY(-2px);
}

.btn--accent {
  background-color: var(--accent-color);
  color: var(--white);
}

.btn--accent:hover {
  background-color: #E45F2C;
  transform: translateY(-2px);
}

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

.btn--outline:hover {
  background-color: var(--primary-100);
}

/* Cards */
.card {
  background-color: var(--white);
  border-radius: var(--radius-md);
  padding: var(--spacing-md);
  box-shadow: var(--shadow-sm);
  border: 1px solid rgba(12, 32, 45, 0.05);
  transition: transform var(--transition-base), box-shadow var(--transition-base);
}

.card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

.card__icon {
  width: 56px;
  height: 56px;
  border-radius: var(--radius-pill);
  background-color: var(--primary-100);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--spacing-sm);
  color: var(--primary-color);
  font-size: 1.5rem;
}

.card__title {
  font-size: 1.35rem;
  margin-bottom: var(--spacing-xs);
  color: var(--slate-900);
}

.card__text {
  color: var(--text-light);
  font-size: var(--fs-body);
}

/* Lists */
.list {
  display: grid;
  gap: var(--spacing-xs);
}

.list--check li::before {
  content: '\2713';
  color: var(--secondary-color);
  margin-right: 0.5rem;
  font-weight: 600;
}

.list--inline {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-sm);
}

/* Form elements */
.form-control {
  width: 100%;
  padding: 0.85rem 1rem;
  border-radius: var(--radius-sm);
  border: 1px solid rgba(26, 26, 26, 0.15);
  background-color: var(--white);
  transition: border-color var(--transition-base), box-shadow var(--transition-base);
}

.form-control:focus {
  border-color: var(--primary-color);
  box-shadow: 0 0 0 3px rgba(44, 95, 124, 0.15);
  outline: none;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

/* Section dividers */
.section-divider {
  width: 80px;
  height: 4px;
  background: linear-gradient(90deg, var(--primary-color), var(--accent-color));
  border-radius: var(--radius-pill);
  margin-bottom: var(--spacing-sm);
}

/* Responsive adjustments */
@media (min-width: 768px) {
  .nav-toggle {
    display: none;
  }

  .primary-nav {
    position: static;
    opacity: 1;
    visibility: visible;
    transform: none;
    box-shadow: none;
  }

  .primary-nav__list {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: 0;
  }

  .primary-nav__item--cta .btn {
    width: auto;
  }

  .primary-nav__item {
    position: relative;
  }

  .primary-nav__submenu {
    position: absolute;
    top: calc(100% + 0.75rem);
    right: 0;
    width: 220px;
    box-shadow: var(--shadow-md);
    border: 1px solid rgba(15, 27, 37, 0.08);
    opacity: 0;
    visibility: hidden;
    transform: translateY(10px);
    transition: opacity var(--transition-base), transform var(--transition-base), visibility var(--transition-base);
  }

  .primary-nav__item--has-children:hover .primary-nav__submenu,
  .primary-nav__item--has-children:focus-within .primary-nav__submenu {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
  }

  .site-footer__grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .site-footer__bar-inner {
    flex-direction: row;
    justify-content: space-between;
    text-align: left;
  }

  .section {
    padding: var(--section-padding-desktop) 0;
  }

  .grid--cols-3 {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .grid--cols-4 {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

@media (min-width: 1024px) {
  .site-header__inner {
    padding: 1rem 0;
  }

  body {
    font-size: 1.05rem;
  }

  .lead {
    font-size: 1.2rem;
  }

  .grid--hero {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    align-items: center;
  }
}

@media (min-width: 1440px) {
  :root {
    --grid-gap: 2rem;
  }

  .btn {
    padding: 0.85rem 2rem;
  }
}