/* ==== RESET ==== */
*, *::before, *::after { box-sizing: border-box; }
* { margin: 0; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body { min-height: 100dvh; }
img, picture, svg { display: block; max-width: 100%; }
input, button, textarea, select { font: inherit; color: inherit; }
button { cursor: pointer; }
a { color: inherit; text-decoration: none; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

/* ==== DESIGN TOKENS ==== */
:root {
  /* Brand colors */
  --navy: #0B3558;
  --navy-800: #082943;
  --navy-900: #061d30;
  --green: #3FAE7C;
  --green-light: #7ED3A6;
  --gray: #7A7A7A;
  --gray-light: #F4F6F8;
  --white: #FFFFFF;

  /* Semantic tokens */
  --color-bg: var(--white);
  --color-bg-alt: var(--gray-light);
  --color-text: var(--navy-900);
  --color-text-secondary: var(--gray);
  --color-accent: var(--green);

  /* Typography */
  --font-heading: 'Poppins', 'Segoe UI', sans-serif;
  --font-body: 'Open Sans', 'Segoe UI', sans-serif;
  --fs-sm: 0.9375rem;
  --fs-base: 1rem;
  --fs-lg: 1.125rem;
  --fs-xl: 1.375rem;
  --fs-2xl: 1.75rem;
  --fs-3xl: 2.25rem;
  --fs-4xl: clamp(2.5rem, 4.5vw + 1rem, 3.75rem);

  /* Spacing (8px rhythm) */
  --space-1: 4px;  --space-2: 8px;  --space-3: 16px; --space-4: 24px;
  --space-5: 32px; --space-6: 48px; --space-7: 64px; --space-8: 96px;
  --space-9: 128px;

  /* Layout */
  --container-max: 1200px;
  --radius-sm: 8px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --radius-full: 999px;

  /* Effects */
  --shadow-glass: 0 8px 32px rgba(11, 53, 88, 0.14);
  --shadow-card: 0 2px 12px rgba(11, 53, 88, 0.08);
  --blur-glass: 18px;
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --transition-base: 220ms var(--ease-out);
  --transition-slow: 500ms var(--ease-out);

  /* Z-index scale */
  --z-header: 100;
  --z-mobile-menu: 200;
}

/* ==== BASE ==== */
body {
  font-family: var(--font-body);
  font-size: var(--fs-base);
  line-height: 1.6;
  color: var(--color-text);
  background: var(--color-bg);
}

h1, h2, h3, h4 {
  font-family: var(--font-heading);
  font-weight: 600;
  line-height: 1.2;
  color: var(--navy);
}

h1 { font-size: var(--fs-4xl); font-weight: 700; }
h2 { font-size: var(--fs-3xl); }
h3 { font-size: var(--fs-xl); }

p { max-width: 68ch; }

:focus-visible {
  outline: 3px solid var(--green);
  outline-offset: 3px;
  border-radius: 4px;
}

/* ==== LAYOUT ==== */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: var(--space-4);
}

.section { padding-block: var(--space-8); }
.section-alt { background: var(--color-bg-alt); }

.eyebrow {
  display: inline-block;
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: var(--fs-sm);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--green);
  margin-bottom: var(--space-2);
}

.section-head { max-width: 760px; margin-bottom: var(--space-6); }
.section-head--center { margin-inline: auto; text-align: center; }

/* ==== ACCESSIBILITY HELPERS ==== */
.sr-only {
  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;
  left: var(--space-3);
  top: -60px;
  background: var(--navy);
  color: var(--white);
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius-sm);
  z-index: 1000;
  transition: top var(--transition-base);
}
.skip-link:focus { top: var(--space-3); }

/* ==== BUTTONS ==== */
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: var(--fs-base);
  padding: var(--space-3) var(--space-5);
  border-radius: var(--radius-full);
  border: 2px solid transparent;
  min-height: 48px;
  transition: transform var(--transition-base), box-shadow var(--transition-base), background var(--transition-base);
  touch-action: manipulation;
}
.btn:hover { transform: translateY(-2px); }
.btn:active { transform: translateY(0); }
.btn svg.icon { width: 20px; height: 20px; }

.btn-primary {
  background: linear-gradient(135deg, var(--green), var(--green-light));
  color: var(--navy);
  box-shadow: 0 8px 24px rgba(63, 174, 124, 0.35);
}
.btn-primary:hover { box-shadow: 0 12px 32px rgba(63, 174, 124, 0.45); }

.btn-outline {
  background: rgba(255, 255, 255, 0.08);
  border-color: rgba(255, 255, 255, 0.5);
  color: var(--white);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}
.btn-outline:hover { background: rgba(255, 255, 255, 0.18); }

.btn-block { width: 100%; justify-content: center; }
.btn:disabled { opacity: 0.6; cursor: not-allowed; transform: none; }

/* ==== LIQUID GLASS ==== */
.glass {
  background: rgba(255, 255, 255, 0.55);
  border: 1px solid rgba(255, 255, 255, 0.6);
  border-radius: var(--radius-lg);
  backdrop-filter: blur(var(--blur-glass)) saturate(160%);
  -webkit-backdrop-filter: blur(var(--blur-glass)) saturate(160%);
  box-shadow: var(--shadow-glass);
}

.glass-dark {
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.16);
  border-radius: var(--radius-lg);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  color: var(--white);
}

/* ==== ANIMATIONS ==== */
@keyframes blob-drift {
  0%   { transform: translate(0, 0) scale(1); }
  33%  { transform: translate(4%, -6%) scale(1.08); }
  66%  { transform: translate(-3%, 4%) scale(0.96); }
  100% { transform: translate(0, 0) scale(1); }
}

.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity var(--transition-slow), transform var(--transition-slow);
}
.reveal.is-visible { opacity: 1; transform: translateY(0); }

/* ==== BREAKPOINTS (reference, used by later tasks) ====
   375px  – small phone
   768px  – tablet
   1024px – small desktop
   1440px – large desktop
*/

/* ==== HEADER ====
   The frosted-glass fill lives on ::before (not on .site-header itself) because
   backdrop-filter on an element turns it into the containing block for any
   position:fixed descendant — which broke the full-viewport mobile .nav-menu
   nested inside this header. Keeping the filter off .site-header avoids that.
*/
.site-header {
  position: sticky;
  top: 0;
  z-index: var(--z-header);
  border-bottom: 1px solid rgba(11, 53, 88, 0.08);
  transition: box-shadow var(--transition-base);
}
.site-header::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  background: rgba(255, 255, 255, 0.75);
  backdrop-filter: blur(16px) saturate(160%);
  -webkit-backdrop-filter: blur(16px) saturate(160%);
}
.site-header.is-scrolled { box-shadow: var(--shadow-card); }

.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 72px;
}

.site-header__logo { height: 34px; width: auto; }

.nav-toggle {
  display: none;
  background: none;
  border: none;
  padding: var(--space-2);
  min-width: 44px;
  min-height: 44px;
  color: var(--navy);
}
.nav-toggle .icon { width: 26px; height: 26px; }

.nav-menu { display: flex; align-items: center; gap: var(--space-5); }
.nav-menu__link {
  font-family: var(--font-heading);
  font-weight: 500;
  font-size: var(--fs-sm);
  color: var(--navy);
  padding: var(--space-2) 0;
  border-bottom: 2px solid transparent;
  transition: border-color var(--transition-base), color var(--transition-base);
}
.nav-menu__link:hover, .nav-menu__link:focus-visible { border-color: var(--green); }

.btn-sm { padding: var(--space-2) var(--space-4); font-size: var(--fs-sm); min-height: 40px; }

@media (max-width: 1023px) {
  .nav-toggle { display: inline-flex; align-items: center; justify-content: center; }

  .nav-menu {
    position: fixed;
    inset: 72px 0 0 0;
    z-index: var(--z-mobile-menu);
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    background: rgba(11, 53, 88, 0.97);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    padding: var(--space-5) var(--space-4);
    transform: translateY(-12px);
    opacity: 0;
    pointer-events: none;
    transition: opacity var(--transition-base), transform var(--transition-base);
  }
  .nav-menu.is-open { opacity: 1; transform: translateY(0); pointer-events: auto; }

  .nav-menu__link {
    color: var(--white);
    font-size: var(--fs-lg);
    padding: var(--space-4) 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.12);
  }

  .nav-menu .btn-primary { margin-top: var(--space-4); }
}

/* ==== HERO ==== */
.hero {
  position: relative;
  overflow: hidden;
  background: linear-gradient(160deg, var(--navy-900), var(--navy) 55%, var(--navy-800));
  padding-block: var(--space-8) var(--space-9);
  color: var(--white);
}

.hero__bg { position: absolute; inset: 0; overflow: hidden; z-index: 0; }
.hero__blob {
  position: absolute;
  border-radius: 50%;
  filter: blur(70px);
  opacity: 0.35;
  mix-blend-mode: screen;
  animation: blob-drift 22s ease-in-out infinite;
}
.hero__blob--1 { width: 480px; height: 480px; background: var(--green); top: -120px; left: -80px; }
.hero__blob--2 { width: 360px; height: 360px; background: var(--green-light); bottom: -100px; right: 5%; animation-duration: 26s; animation-delay: -6s; }
.hero__blob--3 { width: 280px; height: 280px; background: var(--green); top: 30%; right: 25%; animation-duration: 30s; animation-delay: -12s; }

.hero__inner {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
  gap: var(--space-7);
  align-items: center;
}

.eyebrow--light { color: var(--green-light); }

.hero__title { color: var(--white); margin-bottom: var(--space-4); }
.hero__subtitle { color: rgba(255, 255, 255, 0.85); font-size: var(--fs-lg); margin-bottom: var(--space-5); max-width: 52ch; }

.hero__actions { display: flex; flex-wrap: wrap; gap: var(--space-3); margin-bottom: var(--space-6); }

.hero__principles {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-5);
  list-style: none;
  padding: 0;
  font-family: var(--font-heading);
  font-size: var(--fs-sm);
  font-weight: 500;
  color: rgba(255, 255, 255, 0.9);
}
.hero__principles li { display: flex; align-items: center; gap: var(--space-2); }
.hero__principles .icon { width: 20px; height: 20px; color: var(--green-light); }

.hero__panel { padding: var(--space-6); }
.hero__panel-icon { margin-bottom: var(--space-3); }
.hero__panel-title { color: var(--white); font-size: var(--fs-xl); margin-bottom: var(--space-4); }
.hero__panel-list { list-style: none; padding: 0; display: flex; flex-direction: column; gap: var(--space-3); }
.hero__panel-list li {
  padding-left: var(--space-4);
  position: relative;
  font-size: var(--fs-sm);
  color: rgba(255, 255, 255, 0.88);
}
.hero__panel-list li::before {
  content: "";
  position: absolute;
  left: 0; top: 8px;
  width: 8px; height: 8px;
  border-radius: 50%;
  background: var(--green-light);
}

@media (max-width: 1023px) {
  .hero__inner { grid-template-columns: minmax(0, 1fr); }
  .hero__panel { order: -1; }
}

@media (max-width: 480px) {
  .hero__actions { flex-direction: column; align-items: stretch; }
}

/* ==== SERVICES ==== */
.services__grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: var(--space-5);
}

.service-card {
  padding: var(--space-5);
  transition: transform var(--transition-base), box-shadow var(--transition-base);
}
.service-card:hover { transform: translateY(-4px); box-shadow: 0 16px 40px rgba(11, 53, 88, 0.16); }

.service-card__icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 52px;
  height: 52px;
  border-radius: var(--radius-md);
  background: linear-gradient(135deg, var(--green), var(--green-light));
  color: var(--navy);
  margin-bottom: var(--space-4);
}
.service-card__icon .icon { width: 26px; height: 26px; }

.service-card h3 { margin-bottom: var(--space-2); font-size: var(--fs-lg); }
.service-card p { color: var(--color-text-secondary); font-size: var(--fs-sm); }

@media (max-width: 1023px) {
  .services__grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (max-width: 640px) {
  .services__grid { grid-template-columns: minmax(0, 1fr); }
}

/* ==== METHODOLOGY ==== */
.methodology__steps {
  list-style: none;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: var(--space-4);
  counter-reset: none;
}

.methodology__step {
  position: relative;
  padding: var(--space-5) var(--space-3);
  background: var(--white);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-card);
  text-align: center;
}

.methodology__number {
  display: block;
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: var(--fs-sm);
  color: var(--green);
  margin-bottom: var(--space-2);
}

.methodology__icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background: var(--navy);
  color: var(--white);
  margin-bottom: var(--space-3);
}
.methodology__icon .icon { width: 26px; height: 26px; }

.methodology__step h3 { font-size: var(--fs-base); margin-bottom: var(--space-2); }
.methodology__step p { font-size: var(--fs-sm); color: var(--color-text-secondary); max-width: none; }

@media (max-width: 1023px) {
  .methodology__steps { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (max-width: 480px) {
  .methodology__steps { grid-template-columns: minmax(0, 1fr); }
}

/* ==== CREDIBILITY ==== */
.credibility__quote {
  max-width: 820px;
  margin: 0 auto var(--space-7);
  padding: var(--space-6);
  text-align: center;
}
.credibility__quote p {
  font-family: var(--font-heading);
  font-size: var(--fs-xl);
  font-weight: 500;
  color: var(--navy);
  max-width: none;
  line-height: 1.5;
}

.credibility__grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: var(--space-5);
}

.credibility__card {
  text-align: center;
  padding: var(--space-5);
}

.credibility__icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 60px;
  height: 60px;
  border-radius: 50%;
  background: var(--gray-light);
  color: var(--navy);
  margin-bottom: var(--space-3);
}
.credibility__icon .icon { width: 28px; height: 28px; }

.credibility__card h3 { margin-bottom: var(--space-2); }
.credibility__card p { color: var(--color-text-secondary); font-size: var(--fs-sm); margin-inline: auto; }

@media (max-width: 768px) {
  .credibility__grid { grid-template-columns: minmax(0, 1fr); }
}

/* ==== CONTACT ==== */
.contact__inner {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: var(--space-7);
  align-items: start;
}

.contact__info {
  list-style: none;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  margin: var(--space-5) 0;
}
.contact__info li { display: flex; align-items: center; gap: var(--space-3); }
.contact__info .icon { width: 22px; height: 22px; color: var(--green); flex-shrink: 0; }
.contact__info a { font-weight: 600; }
.contact__info address { font-style: normal; }

.contact__map { margin-top: var(--space-5); border-radius: var(--radius-md); overflow: hidden; box-shadow: var(--shadow-card); }
.contact__map iframe { width: 100%; height: 280px; border: 0; }

.contact-form { padding: var(--space-6); display: flex; flex-direction: column; gap: var(--space-4); }

.form-field { display: flex; flex-direction: column; gap: var(--space-1); }
.form-field label { font-family: var(--font-heading); font-weight: 600; font-size: var(--fs-sm); color: var(--navy); }

.form-field input,
.form-field select,
.form-field textarea {
  width: 100%;
  min-width: 0;
  border: 1px solid rgba(11, 53, 88, 0.2);
  border-radius: var(--radius-sm);
  padding: var(--space-3);
  font-size: var(--fs-base);
  min-height: 48px;
  background: rgba(255, 255, 255, 0.85);
  transition: border-color var(--transition-base);
}
.form-field textarea { min-height: 96px; resize: vertical; }
.form-field input:focus, .form-field select:focus, .form-field textarea:focus {
  border-color: var(--green);
}
.form-field input[aria-invalid="true"], .form-field textarea[aria-invalid="true"] {
  border-color: #C0392B;
}

.form-field__error { color: #C0392B; font-size: var(--fs-sm); min-height: 1.2em; }

.form-field-row { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: var(--space-3); }

.form-field--checkbox { flex-direction: row; align-items: flex-start; flex-wrap: wrap; gap: var(--space-2); }
.form-field--checkbox input { width: 20px; height: 20px; margin-top: 2px; }
.form-field--checkbox label { font-weight: 400; font-size: var(--fs-sm); color: var(--color-text-secondary); }
.form-field--checkbox a { color: var(--navy); text-decoration: underline; }

.form-field--honeypot { position: absolute; left: -9999px; width: 1px; height: 1px; overflow: hidden; }

.contact-form__status { font-size: var(--fs-sm); font-weight: 600; min-height: 1.2em; }
.contact-form__status[data-state="success"] { color: #1E7E4F; }
.contact-form__status[data-state="error"] { color: #C0392B; }

@media (max-width: 1023px) {
  .contact__inner { grid-template-columns: minmax(0, 1fr); }
  .form-field-row { grid-template-columns: minmax(0, 1fr); }
}

/* ==== FOOTER ==== */
.site-footer { background: var(--navy-900); color: rgba(255, 255, 255, 0.85); padding-top: var(--space-7); }

.site-footer__inner {
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(0, 1fr) minmax(0, 1fr);
  gap: var(--space-6);
  padding-bottom: var(--space-6);
  border-bottom: 1px solid rgba(255, 255, 255, 0.12);
}

.site-footer__brand img { margin-bottom: var(--space-3); filter: brightness(0) invert(1); }
.site-footer__brand p { font-size: var(--fs-sm); color: rgba(255, 255, 255, 0.65); }

.site-footer__nav, .site-footer__contact { display: flex; flex-direction: column; gap: var(--space-2); font-size: var(--fs-sm); }
.site-footer__nav a:hover, .site-footer__contact a:hover { color: var(--green-light); }
.site-footer__contact address { font-style: normal; color: rgba(255, 255, 255, 0.65); }

.site-footer__legal { padding-block: var(--space-4) var(--space-6); font-size: 0.8125rem; color: rgba(255, 255, 255, 0.55); display: flex; flex-direction: column; gap: var(--space-2); }
.site-footer__legal p { max-width: none; }

@media (max-width: 768px) {
  .site-footer__inner { grid-template-columns: minmax(0, 1fr); gap: var(--space-4); }
}