/* ==========================================================================
   Cleaner Network — About Us Page Stylesheet
   Design system: Primary Green #16803C · Dark Navy #0F2239
   Mobile-first, fully responsive, vanilla CSS3
   ========================================================================== */

/* -------------------- Reset & Base -------------------- */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'Poppins', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  color: #0F2239;
  background-color: #FFFFFF;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

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

a {
  text-decoration: none;
  color: inherit;
}

ul {
  list-style: none;
}

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
}

.logo__icon {
    color: var(--color-green);
    font-size: 1.4rem;
    width: 139px;
    height: auto;
}

/* -------------------- Design Tokens -------------------- */
:root {
  --color-primary: #16803C;
  --color-primary-dark: #106430;
  --color-primary-light: #E8F5EC;
  --color-navy: #0F2239;
  --color-white: #FFFFFF;
  --color-bg-light: #F8FAFC;
  --color-border: #E5E7EB;
  --color-text-gray: #6B7280;

  --radius-sm: 12px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --radius-full: 999px;

  --shadow-soft: 0 4px 20px rgba(15, 34, 57, 0.06);
  --shadow-medium: 0 10px 30px rgba(15, 34, 57, 0.10);
  --shadow-hover: 0 16px 40px rgba(15, 34, 57, 0.14);

  --transition: 0.3s ease;

  --space-desktop: 80px;
  --space-tablet: 50px;
  --space-mobile: 30px;

  --container-max: 1200px;
}

/* -------------------- Utility -------------------- */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 24px;
}

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

.eyebrow {
  display: inline-block;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  color: var(--color-primary);
  margin-bottom: 16px;
}

.section-heading {
  font-size: 32px;
  font-weight: 700;
  color: var(--color-navy);
  line-height: 1.25;
}

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

.section-intro {
  text-align: center;
  max-width: 640px;
  margin: 12px auto 0;
  color: var(--color-text-gray);
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 14px 28px;
  border-radius: var(--radius-full);
  font-weight: 600;
  font-size: 15px;
  transition: transform var(--transition), box-shadow var(--transition), background-color var(--transition), color var(--transition);
  white-space: nowrap;
}

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

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

.btn-outline {
  background-color: transparent;
  color: var(--color-navy);
  border: 1.5px solid var(--color-border);
}

.btn-outline:hover {
  border-color: var(--color-navy);
  transform: translateY(-2px);
}

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

.btn-white:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-hover);
}

.btn-outline-light {
  background: transparent;
  color: var(--color-white);
  border: 1.5px solid rgba(255, 255, 255, 0.5);
}

.btn-outline-light:hover {
  border-color: var(--color-white);
  background: rgba(255, 255, 255, 0.08);
  transform: translateY(-2px);
}

.btn-block {
  width: 100%;
}

/* Fade-in-on-scroll */
.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

@media (prefers-reduced-motion: reduce) {
  .reveal {
    opacity: 1;
    transform: none;
    transition: none;
  }
  html {
    scroll-behavior: auto;
  }
}

/* -------------------- Header / Navigation -------------------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background-color: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--color-border);
}

.navbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 24px;
  max-width: var(--container-max);
  margin: 0 auto;
  gap: 16px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  color: var(--color-navy);
}

.logo-icon {
  width: 40px;
  height: 40px;
  border-radius: 10px;
  background-color: var(--color-primary-light);
  color: var(--color-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  flex-shrink: 0;
}

.logo-text {
  display: flex;
  flex-direction: column;
  line-height: 1.15;
}

.logo-text strong {
  font-size: 16px;
}

.logo-tagline {
  font-size: 9px;
  font-weight: 500;
  letter-spacing: 0.5px;
  color: var(--color-text-gray);
  text-transform: uppercase;
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 28px;
}

.nav-link {
  font-size: 14.5px;
  font-weight: 500;
  color: var(--color-navy);
  position: relative;
  padding: 6px 0;
  transition: color var(--transition);
  white-space: nowrap;
}

.nav-link:hover,
.nav-link.is-active {
  color: var(--color-primary);
}

.nav-link.is-active::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: -2px;
  width: 100%;
  height: 2px;
  background-color: var(--color-primary);
  border-radius: var(--radius-full);
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}

.nav-actions .btn {
  padding: 10px 20px;
  font-size: 14px;
}

.hamburger {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 32px;
  height: 32px;
  z-index: 1100;
}

.hamburger span {
  display: block;
  width: 100%;
  height: 2px;
  background-color: var(--color-navy);
  border-radius: 2px;
  transition: transform var(--transition), opacity var(--transition);
}

.hamburger.is-open span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.hamburger.is-open span:nth-child(2) {
  opacity: 0;
}

.hamburger.is-open span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* -------------------- Hero -------------------- */
.hero {
  padding: 50px 0 var(--space-mobile);
}

.hero .container {
  display: grid;
  grid-template-columns: 1fr;
  gap: 40px;
  align-items: center;
}

.hero-heading {
  font-size: 34px;
  font-weight: 700;
  line-height: 1.2;
  color: var(--color-navy);
  margin-bottom: 20px;
}

.hero-heading .highlight {
  color: var(--color-primary);
}

.hero-text {
  color: var(--color-text-gray);
  font-size: 16px;
  margin-bottom: 32px;
  max-width: 520px;
}

.hero-features {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px 16px;
}

.hero-feature {
  display: flex;
  align-items: center;
  gap: 12px;
}

.hero-feature-icon {
  width: 40px;
  height: 40px;
  min-width: 40px;
  border-radius: 12px;
  background-color: var(--color-primary-light);
  color: var(--color-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 16px;
  transition: transform var(--transition);
}

.hero-feature:hover .hero-feature-icon {
  transform: scale(1.1);
}

.hero-feature-label {
  font-size: 13.5px;
  font-weight: 600;
  color: var(--color-navy);
  line-height: 1.3;
}

.hero-media {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-medium);
  aspect-ratio: 4 / 3;
}

.hero-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* -------------------- Mission & Values -------------------- */
.mission-values-card {
  background-color: var(--color-bg-light);
  border-radius: var(--radius-lg);
  padding: 32px 24px;
  display: grid;
  grid-template-columns: 1fr;
  gap: 40px;
}

.mission-heading,
.values-heading {
  font-size: 24px;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 16px;
}

.mission-col p {
  color: var(--color-text-gray);
  margin-bottom: 16px;
}

.mission-col p:last-child {
  margin-bottom: 0;
}

.values-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px 20px;
}

.value-card {
  display: flex;
  gap: 14px;
  align-items: flex-start;
  transition: transform var(--transition);
}

.value-card:hover {
  transform: translateY(-4px);
}

.value-icon {
  width: 44px;
  height: 44px;
  min-width: 44px;
  border-radius: 50%;
  background-color: var(--color-white);
  border: 1.5px solid var(--color-primary-light);
  color: var(--color-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 17px;
  transition: transform var(--transition), background-color var(--transition);
}

.value-card:hover .value-icon {
  background-color: var(--color-primary);
  color: var(--color-white);
  transform: scale(1.1);
}

.value-title {
  font-size: 15.5px;
  font-weight: 700;
  color: var(--color-navy);
  margin-bottom: 4px;
}

.value-desc {
  font-size: 13.5px;
  color: var(--color-text-gray);
}

/* -------------------- Stats -------------------- */
.stats-card {
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-soft);
  padding: 32px 24px;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 32px 20px;
}

.stat-item {
  text-align: center;
  transition: transform var(--transition);
}

.stat-item:hover {
  transform: translateY(-4px);
}

.stat-icon {
  width: 52px;
  height: 52px;
  margin: 0 auto 12px;
  border-radius: 50%;
  background-color: var(--color-primary-light);
  color: var(--color-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  transition: transform var(--transition);
}

.stat-item:hover .stat-icon {
  transform: scale(1.12);
}

.stat-number {
  font-size: 28px;
  font-weight: 700;
  color: var(--color-navy);
  margin-bottom: 4px;
}

.stat-label {
  font-size: 13.5px;
  color: var(--color-text-gray);
}

.stats-footer {
  text-align: center;
  margin-top: 28px;
  padding-top: 24px;
  border-top: 1px solid var(--color-border);
  font-size: 13.5px;
  font-weight: 500;
  color: var(--color-text-gray);
}

/* -------------------- Our Story -------------------- */
.story .container {
  display: grid;
  grid-template-columns: 1fr;
  gap: 32px;
  align-items: center;
}

.story-heading {
  font-size: 28px;
  font-weight: 700;
  color: var(--color-navy);
  margin-bottom: 18px;
}

.story-text p {
  color: var(--color-text-gray);
  margin-bottom: 14px;
}

.story-text p:last-child {
  margin-bottom: 0;
}

.story-media {
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-medium);
  aspect-ratio: 4 / 3;
}

.story-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* -------------------- Why Choose -------------------- */
.why-grid {
  margin-top: 36px;
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
}

.why-card {
  text-align: center;
  padding: 24px 16px;
  border-radius: var(--radius-md);
  transition: transform var(--transition), box-shadow var(--transition);
}

.why-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-soft);
}

.why-icon {
  width: 56px;
  height: 56px;
  margin: 0 auto 16px;
  border-radius: 50%;
  background-color: var(--color-primary-light);
  color: var(--color-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 22px;
  transition: transform var(--transition);
}

.why-card:hover .why-icon {
  transform: scale(1.12) rotate(-4deg);
}

.why-title {
  font-size: 16px;
  font-weight: 700;
  color: var(--color-navy);
  margin-bottom: 8px;
}

.why-desc {
  font-size: 14px;
  color: var(--color-text-gray);
}

/* -------------------- CTA -------------------- */
.cta-section {
  background-color: var(--color-primary);
  border-radius: var(--radius-lg);
  padding: 40px 24px;
  overflow: hidden;
  position: relative;
}

.cta-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 32px;
  align-items: center;
}

.cta-heading {
  font-size: 26px;
  font-weight: 700;
  color: var(--color-white);
  margin-bottom: 14px;
  line-height: 1.25;
}

.cta-text {
  color: rgba(255, 255, 255, 0.85);
  margin-bottom: 26px;
  max-width: 440px;
}

.cta-buttons {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
}

.cta-illustration {
  display: flex;
  justify-content: center;
}

.cta-illustration svg {
  width: 100%;
  max-width: 320px;
  height: auto;
}

/* -------------------- Footer -------------------- */
.site-footer {
  background-color: var(--color-navy);
  color: rgba(255, 255, 255, 0.72);
  padding: 56px 0 24px;
  margin-top: var(--space-mobile);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 36px;
  padding-bottom: 36px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-brand .logo-text strong,
.footer-brand .logo {
  color: var(--color-white);
}

.footer-brand p {
  margin-top: 14px;
  font-size: 14px;
  max-width: 280px;
  color: rgba(255, 255, 255, 0.6);
}

.footer-col-title {
  font-size: 14px;
  font-weight: 700;
  color: var(--color-white);
  margin-bottom: 16px;
  letter-spacing: 0.3px;
}

.footer-col ul li {
  margin-bottom: 10px;
}

.footer-col ul li a {
  font-size: 14px;
  transition: color var(--transition), padding-left var(--transition);
}

.footer-col ul li a:hover {
  color: var(--color-white);
  padding-left: 4px;
}

.footer-social {
  display: flex;
  gap: 10px;
  margin-top: 6px;
}

.footer-social a {
  width: 38px;
  height: 38px;
  border-radius: 50%;
  background-color: rgba(255, 255, 255, 0.08);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background-color var(--transition), transform var(--transition);
}

.footer-social a:hover {
  background-color: var(--color-primary);
  transform: translateY(-3px);
}

.footer-bottom {
  padding-top: 24px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  align-items: center;
  text-align: center;
  font-size: 13px;
  color: rgba(255, 255, 255, 0.5);
}

/* ==========================================================================
   Tablet — 768px+
   ========================================================================== */
@media (min-width: 768px) {
  .section {
    padding: var(--space-tablet) 0;
  }

  .section-heading {
    font-size: 36px;
  }

  .hero-heading {
    font-size: 42px;
  }

  .mission-values-card {
    padding: 48px 40px;
    grid-template-columns: 1fr 1fr;
    gap: 56px;
  }

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

  .why-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .cta-section {
    padding: 56px;
  }

  .footer-grid {
    grid-template-columns: 1.3fr 1fr 1fr;
  }

  .footer-bottom {
    flex-direction: row;
    justify-content: space-between;
    text-align: left;
  }
}

/* ==========================================================================
   Laptop / Desktop — 992px+
   ========================================================================== */
@media (min-width: 992px) {
  .container {
    padding: 0 40px;
  }

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

  .section-heading {
    font-size: 40px;
  }

  .hamburger {
    display: none !important;
  }

  .nav-menu {
    display: flex !important;
    position: static;
    flex-direction: row;
    background: none;
    height: auto;
    width: auto;
    padding: 0;
    box-shadow: none;
  }

  .hero {
    padding: 70px 0 var(--space-desktop);
  }

  .hero .container {
    grid-template-columns: 1fr 1fr;
    gap: 64px;
  }

  .hero-heading {
    font-size: 48px;
  }

  .hero-features {
    grid-template-columns: repeat(2, 1fr);
    max-width: 460px;
  }

  .mission-values-card {
    padding: 56px;
  }

  .story .container {
    grid-template-columns: 1fr 1fr;
    gap: 72px;
  }

  .story-heading {
    font-size: 32px;
  }

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

  .cta-grid {
    grid-template-columns: 1.2fr 1fr;
  }

  .cta-heading {
    font-size: 34px;
  }

  .footer-grid {
    grid-template-columns: 1.5fr 1fr 1fr 1fr;
  }
}

/* ==========================================================================
   Small Mobile — max 480px fine-tuning
   ========================================================================== */
@media (max-width: 480px) {
  .hero-heading {
    font-size: 28px;
  }

  .section-heading {
    font-size: 26px;
  }

  .hero-features {
    grid-template-columns: 1fr;
  }

  .cta-buttons {
    flex-direction: column;
  }

  .cta-buttons .btn {
    width: 100%;
  }

  .values-grid {
    grid-template-columns: 1fr;
  }
}

/* ==========================================================================
   Mobile Navigation Overlay (below 992px)
   ========================================================================== */
@media (max-width: 991px) {
  .hamburger {
    display: flex;
  }

  .nav-menu {
    position: fixed;
    top: 0;
    right: 0;
    height: 100vh;
    width: min(78vw, 320px);
    background-color: var(--color-white);
    flex-direction: column;
    align-items: flex-start;
    padding: 100px 32px 32px;
    gap: 22px;
    box-shadow: -8px 0 30px rgba(15, 34, 57, 0.12);
    transform: translateX(100%);
    transition: transform 0.35s ease;
    z-index: 1050;
    overflow-y: auto;
  }

  .nav-menu.is-open {
    transform: translateX(0);
  }

  .nav-menu .nav-link {
    font-size: 16px;
  }

  .nav-actions {
    flex-direction: column;
    align-items: stretch;
    width: 100%;
    margin-top: 8px;
  }

  .nav-actions .btn {
    width: 100%;
  }

  .nav-overlay {
    position: fixed;
    inset: 0;
    background-color: rgba(15, 34, 57, 0.4);
    opacity: 0;
    visibility: hidden;
    transition: opacity var(--transition);
    z-index: 1040;
  }

  .nav-overlay.is-open {
    opacity: 1;
    visibility: visible;
  }

  body.nav-is-open {
    overflow: hidden;
  }
}