/* ==========================================================================
   Certain Solutions — Responsive Styles
   ========================================================================== */

:root {
  --color-navy-950: #071120;
  --color-navy-900: #0a1628;
  --color-navy-800: #0f2744;
  --color-navy-700: #1a365d;
  --color-navy-600: #234876;

  --color-teal-600: #0d9488;
  --color-teal-500: #14b8a6;
  --color-teal-400: #2dd4bf;

  --color-accent: #dc7364;
  --color-accent-dark: #c45f51;

  --color-white: #ffffff;
  --color-gray-50: #f8fafc;
  --color-gray-100: #f1f5f9;
  --color-gray-200: #e2e8f0;
  --color-gray-300: #cbd5e1;
  --color-gray-400: #94a3b8;
  --color-gray-600: #475569;
  --color-gray-700: #334155;
  --color-gray-800: #1e293b;

  --font-body: "Inter", system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --font-heading: "Plus Jakarta Sans", "Inter", system-ui, sans-serif;

  --shadow-sm: 0 1px 3px rgba(10, 22, 40, 0.08);
  --shadow-md: 0 8px 24px rgba(10, 22, 40, 0.10);
  --shadow-lg: 0 18px 48px rgba(10, 22, 40, 0.16);

  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 18px;

  --header-height: 74px;
  --container-max: 1200px;
  --transition: 0.25s ease;
}

/* Reset */

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: var(--header-height);
}

body {
  font-family: var(--font-body);
  color: var(--color-gray-700);
  background: var(--color-white);
  font-size: 1rem;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

body.nav-open {
  overflow: hidden;
}

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

a {
  color: var(--color-teal-600);
  text-decoration: none;
  transition: color var(--transition), background var(--transition);
}

ul,
ol {
  list-style: none;
}

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

button {
  cursor: pointer;
}

address {
  font-style: normal;
}

a:focus-visible,
button:focus-visible,
input:focus-visible,
select:focus-visible,
textarea:focus-visible {
  outline: 3px solid rgba(20, 184, 166, 0.45);
  outline-offset: 3px;
}

/* Utilities */

.container {
  width: 100%;
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: 1.5rem;
}

.skip-link {
  position: absolute;
  top: -120px;
  left: 1rem;
  z-index: 9999;
  padding: 0.75rem 1rem;
  background: var(--color-teal-500);
  color: var(--color-white);
  font-weight: 700;
  border-radius: var(--radius-sm);
}

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

/* Header */

.site-header {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 1000;
  height: var(--header-height);
  background: rgba(255, 255, 255, 0.96);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid transparent;
  transition: box-shadow var(--transition), border-color var(--transition);
}

.site-header.is-scrolled {
  border-bottom-color: var(--color-gray-200);
  box-shadow: var(--shadow-sm);
}

.header-inner {
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.logo {
  display: inline-flex;
  align-items: center;
  gap: 0.65rem;
  color: var(--color-navy-800);
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 1.1rem;
  flex-shrink: 0;
}

.logo:hover {
  color: var(--color-navy-800);
}

.logo-icon {
  width: 42px;
  height: 42px;
  object-fit: contain;
}

.logo strong {
  color: var(--color-accent);
}

/* Desktop Navigation */

.site-nav {
  display: block;
}

.nav-list {
  display: flex;
  align-items: center;
  gap: 0.15rem;
}

.nav-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 42px;
  padding: 0.55rem 0.85rem;
  color: var(--color-gray-700);
  font-size: 0.93rem;
  font-weight: 600;
  border-radius: var(--radius-sm);
  white-space: nowrap;
}

.nav-link:hover,
.nav-link:focus-visible {
  color: var(--color-navy-900);
  background: var(--color-gray-100);
}

.nav-link.is-active {
  color: var(--color-teal-600);
  background: rgba(20, 184, 166, 0.08);
}

.nav-link--cta {
  margin-left: 0.45rem;
  padding-inline: 1.15rem;
  color: var(--color-white) !important;
  background: var(--color-accent);
}

.nav-link--cta:hover,
.nav-link--cta:focus-visible {
  color: var(--color-white) !important;
  background: var(--color-accent-dark);
}

/* Mobile Toggle */

.nav-toggle {
  display: none;
  width: 46px;
  height: 46px;
  border: 1px solid var(--color-gray-200);
  border-radius: var(--radius-sm);
  background: var(--color-white);
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 5px;
  z-index: 1101;
}

.nav-toggle-bar {
  width: 23px;
  height: 2px;
  background: var(--color-navy-800);
  border-radius: 999px;
  transition: transform var(--transition), opacity var(--transition);
}

.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(2) {
  opacity: 0;
}

.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* Hero */

.hero {
  position: relative;
  min-height: 100vh;
  min-height: 100dvh;
  display: flex;
  align-items: center;
  padding-top: var(--header-height);
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  inset: 0;
  z-index: 0;
  background:
    radial-gradient(circle at 75% 20%, rgba(20, 184, 166, 0.22), transparent 34%),
    radial-gradient(circle at 10% 90%, rgba(220, 115, 100, 0.22), transparent 28%),
    linear-gradient(135deg, var(--color-navy-950), var(--color-navy-800) 48%, var(--color-navy-700));
}

.hero-bg::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.035) 1px, transparent 1px);
  background-size: 60px 60px;
  mask-image: linear-gradient(to bottom, rgba(0, 0, 0, 0.55), transparent 88%);
}

.hero-inner {
  position: relative;
  z-index: 1;
  width: 100%;
  padding-block: 5rem;
}

.hero-content {
  max-width: 760px;
}

.hero-eyebrow,
.section-eyebrow {
  display: inline-flex;
  align-items: center;
  margin-bottom: 0.85rem;
  color: var(--color-teal-600);
  font-size: 0.8rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.07em;
}

.hero-eyebrow {
  padding: 0.35rem 0.9rem;
  color: var(--color-teal-400);
  background: rgba(20, 184, 166, 0.12);
  border: 1px solid rgba(20, 184, 166, 0.22);
  border-radius: 999px;
}

.hero h1 {
  margin-bottom: 1.25rem;
  font-family: var(--font-heading);
  font-size: clamp(2.25rem, 6vw, 4.25rem);
  line-height: 1.08;
  color: var(--color-white);
  letter-spacing: -0.04em;
}

.hero-lead {
  max-width: 660px;
  margin-bottom: 2rem;
  color: rgba(255, 255, 255, 0.83);
  font-size: clamp(1rem, 2vw, 1.2rem);
  line-height: 1.75;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin-bottom: 3rem;
}

.hero-stats {
  display: flex;
  flex-wrap: wrap;
  gap: 1.5rem 3rem;
  padding-top: 2rem;
  border-top: 1px solid rgba(255, 255, 255, 0.14);
}

.hero-stats li {
  min-width: 150px;
}

.stat-value {
  display: block;
  font-family: var(--font-heading);
  color: var(--color-teal-400);
  font-size: 1.65rem;
  font-weight: 800;
  line-height: 1.15;
}

.stat-label {
  display: block;
  margin-top: 0.25rem;
  color: rgba(255, 255, 255, 0.68);
  font-size: 0.9rem;
}

/* Buttons */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0.85rem 1.55rem;
  border: 2px solid transparent;
  border-radius: var(--radius-sm);
  font-size: 0.95rem;
  font-weight: 800;
  transition: transform var(--transition), background var(--transition), border-color var(--transition), color var(--transition);
}

.btn:hover {
  transform: translateY(-2px);
}

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

.btn-primary:hover,
.btn-primary:focus-visible {
  color: var(--color-white);
  background: var(--color-accent-dark);
  border-color: var(--color-accent-dark);
}

.btn-outline {
  color: var(--color-white);
  background: transparent;
  border-color: rgba(255, 255, 255, 0.35);
}

.btn-outline:hover,
.btn-outline:focus-visible {
  color: var(--color-white);
  background: rgba(255, 255, 255, 0.08);
  border-color: rgba(255, 255, 255, 0.68);
}

.btn-full {
  width: 100%;
}

/* Sections */

.section {
  padding-block: 5.5rem;
}

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

.section--gray {
  background: var(--color-gray-50);
}

.section--navy {
  background: var(--color-navy-800);
  color: rgba(255, 255, 255, 0.82);
}

.section--contact {
  background: linear-gradient(180deg, var(--color-gray-50), var(--color-white));
}

.section-header {
  max-width: 720px;
  margin: 0 auto 3.5rem;
  text-align: center;
}

.section-header--left {
  margin: 0;
  text-align: left;
}

.section-header h2 {
  margin-bottom: 1rem;
  color: var(--color-navy-800);
  font-family: var(--font-heading);
  font-size: clamp(1.85rem, 4vw, 2.65rem);
  line-height: 1.2;
  letter-spacing: -0.03em;
}

.section-lead {
  color: var(--color-gray-600);
  font-size: 1.06rem;
  line-height: 1.75;
}

.section-header--light .section-eyebrow {
  color: var(--color-teal-400);
}

.section-header--light h2,
.section-header--light .section-lead {
  color: var(--color-white);
}

.section-header--light .section-lead {
  opacity: 0.82;
}

/* Cards */

.card-grid {
  display: grid;
  gap: 1.5rem;
}

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

.card,
.industry-card,
.why-card,
.proof-card,
.approach-step {
  border-radius: var(--radius-lg);
}

.card {
  display: flex;
  flex-direction: column;
  min-height: 100%;
  padding: 2rem;
  background: var(--color-white);
  border: 1px solid var(--color-gray-200);
  box-shadow: 0 1px 0 rgba(10, 22, 40, 0.02);
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
}

.card:hover,
.why-card:hover,
.proof-card:hover,
.approach-step:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: rgba(20, 184, 166, 0.32);
}

.card-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  margin-bottom: 1.25rem;
  color: var(--color-teal-600);
  background: rgba(20, 184, 166, 0.1);
  border-radius: var(--radius-md);
  font-family: var(--font-heading);
  font-weight: 800;
}

.card h3,
.industry-card h3,
.why-card h3,
.proof-card h3,
.approach-step h3 {
  margin-bottom: 0.75rem;
  color: var(--color-navy-800);
  font-family: var(--font-heading);
  font-size: 1.13rem;
  line-height: 1.35;
}

.card p,
.industry-card p,
.why-card p,
.proof-card p,
.approach-step p {
  color: var(--color-gray-600);
  font-size: 0.95rem;
  line-height: 1.7;
}

.card-list {
  margin-top: 1.15rem;
}

.card-list li {
  position: relative;
  margin-bottom: 0.45rem;
  padding-left: 1.25rem;
  color: var(--color-gray-600);
  font-size: 0.9rem;
}

.card-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.65em;
  width: 7px;
  height: 7px;
  background: var(--color-accent);
  border-radius: 999px;
}

/* Industries */

.industry-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1.25rem;
}

.industry-card {
  padding: 1.75rem;
  background: rgba(255, 255, 255, 0.065);
  border: 1px solid rgba(255, 255, 255, 0.11);
  transition: transform var(--transition), background var(--transition), border-color var(--transition);
}

.industry-card:hover {
  transform: translateY(-4px);
  background: rgba(255, 255, 255, 0.1);
  border-color: rgba(20, 184, 166, 0.36);
}

.industry-card h3 {
  color: var(--color-white);
}

.industry-card p {
  color: rgba(255, 255, 255, 0.72);
}

/* Approach */

.approach-steps {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1.5rem;
}

.approach-step {
  display: flex;
  gap: 1.25rem;
  padding: 2rem;
  background: var(--color-gray-50);
  border: 1px solid var(--color-gray-200);
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
}

.step-number {
  flex-shrink: 0;
  color: var(--color-accent);
  font-family: var(--font-heading);
  font-size: 2rem;
  font-weight: 800;
  line-height: 1;
}

/* Proof */

.proof-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1.5rem;
}

.proof-card {
  padding: 2rem;
  background: var(--color-white);
  border: 1px solid var(--color-gray-200);
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
}

.proof-card span {
  display: block;
  margin-bottom: 1rem;
  color: var(--color-accent);
  font-family: var(--font-heading);
  font-size: 2rem;
  font-weight: 800;
}

/* Why Us */

.split-layout {
  display: grid;
  grid-template-columns: minmax(0, 0.95fr) minmax(0, 1.25fr);
  gap: 3rem;
  align-items: start;
}

.why-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1.25rem;
}

.why-card {
  padding: 1.75rem;
  background: var(--color-white);
  border: 1px solid var(--color-gray-200);
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
}

/* Contact */

.contact-layout {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr);
  gap: 3.5rem;
  align-items: start;
}

.contact-info h2 {
  margin-bottom: 1rem;
  color: var(--color-navy-800);
  font-family: var(--font-heading);
  font-size: clamp(1.85rem, 4vw, 2.5rem);
  line-height: 1.2;
}

.contact-details {
  display: grid;
  gap: 1.1rem;
  margin-top: 2rem;
}

.contact-item {
  display: grid;
  gap: 0.2rem;
}

.contact-item span {
  color: var(--color-navy-800);
  font-weight: 800;
}

.contact-item a,
.contact-item p {
  color: var(--color-gray-700);
}

.contact-form {
  padding: 2rem;
  background: var(--color-white);
  border: 1px solid var(--color-gray-200);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
}

.form-row {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
}

.form-group {
  margin-bottom: 1.2rem;
}

.form-group label {
  display: block;
  margin-bottom: 0.4rem;
  color: var(--color-navy-800);
  font-size: 0.9rem;
  font-weight: 800;
}

.required {
  color: #dc2626;
}

.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 0.8rem 0.95rem;
  color: var(--color-gray-800);
  background: var(--color-white);
  border: 1px solid var(--color-gray-300);
  border-radius: var(--radius-sm);
  transition: border-color var(--transition), box-shadow var(--transition);
}

.form-group textarea {
  resize: vertical;
  min-height: 125px;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  border-color: var(--color-teal-500);
  box-shadow: 0 0 0 4px rgba(20, 184, 166, 0.14);
  outline: none;
}

.form-group input.is-invalid,
.form-group textarea.is-invalid {
  border-color: #dc2626;
}

.form-error {
  display: block;
  min-height: 1.15rem;
  margin-top: 0.35rem;
  color: #dc2626;
  font-size: 0.8rem;
}

.form-success {
  margin-top: 1rem;
  padding: 1rem;
  color: var(--color-teal-600);
  background: rgba(20, 184, 166, 0.1);
  border-radius: var(--radius-sm);
  font-weight: 700;
  text-align: center;
}

.form-note {
  margin-top: 1rem;
  color: var(--color-gray-600);
  font-size: 0.82rem;
}

/* Footer */

.site-footer {
  padding-top: 4rem;
  color: rgba(255, 255, 255, 0.72);
  background: var(--color-navy-950);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.35fr 1fr 1fr 1fr;
  gap: 2.25rem;
  padding-bottom: 3rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.09);
}

.logo--footer {
  margin-bottom: 1rem;
  color: var(--color-white);
}

.footer-brand p {
  max-width: 320px;
  font-size: 0.94rem;
}

.footer-nav h3,
.footer-services h3,
.footer-contact h3 {
  margin-bottom: 1rem;
  color: var(--color-white);
  font-family: var(--font-heading);
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.07em;
}

.footer-nav li,
.footer-services li,
.footer-contact li {
  margin-bottom: 0.55rem;
  font-size: 0.93rem;
}

.footer-nav a,
.footer-contact a,
.footer-legal a {
  color: rgba(255, 255, 255, 0.68);
}

.footer-nav a:hover,
.footer-contact a:hover,
.footer-legal a:hover {
  color: var(--color-teal-400);
}

.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding-block: 1.5rem;
  font-size: 0.88rem;
}

.footer-legal {
  display: flex;
  gap: 1.25rem;
}

/* Tablet */

@media (max-width: 1024px) {
  .card-grid--3,
  .industry-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

  .split-layout,
  .contact-layout {
    grid-template-columns: 1fr;
    gap: 2.5rem;
  }

  .footer-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

/* Mobile Navigation Fix */

@media (max-width: 768px) {
  :root {
    --header-height: 66px;
  }

  .container {
    padding-inline: 1rem;
  }

  .logo {
    font-size: 1rem;
  }

  .logo-icon {
    width: 38px;
    height: 38px;
  }

  .nav-toggle {
    display: flex;
  }

  .site-nav {
    position: fixed;
    top: var(--header-height);
    left: 0;
    right: 0;
    height: calc(100dvh - var(--header-height));
    display: block;
    background: var(--color-white);
    border-top: 1px solid var(--color-gray-200);
    padding: 1rem;
    overflow-y: auto;
    transform: translateX(100%);
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transition:
      transform 0.3s ease,
      opacity 0.3s ease,
      visibility 0.3s ease;
    z-index: 1099;
  }

  .site-nav.is-open {
    transform: translateX(0);
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
  }

  .nav-list {
    display: flex;
    flex-direction: column;
    align-items: stretch;
    gap: 0.35rem;
  }

  .nav-link {
    justify-content: flex-start;
    width: 100%;
    min-height: 50px;
    padding: 0.85rem 1rem;
    color: var(--color-navy-800);
    font-size: 1rem;
    border-radius: var(--radius-sm);
  }

  .nav-link--cta {
    justify-content: center;
    margin-left: 0;
    margin-top: 0.75rem;
  }

  .hero {
    min-height: auto;
  }

  .hero-inner {
    padding-block: 4rem;
  }

  .hero-actions {
    flex-direction: column;
  }

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

  .hero-stats {
    display: grid;
    grid-template-columns: 1fr;
    gap: 1.25rem;
  }

  .section {
    padding-block: 4rem;
  }

  .section-header {
    margin-bottom: 2.5rem;
  }

  .card-grid--3,
  .industry-grid,
  .approach-steps,
  .why-grid {
    grid-template-columns: 1fr;
  }

  .card,
  .industry-card,
  .why-card,
  .proof-card,
  .approach-step,
  .contact-form {
    padding: 1.5rem;
  }

  .approach-step {
    flex-direction: column;
    gap: 0.75rem;
  }

  .form-row {
    grid-template-columns: 1fr;
    gap: 0;
  }

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

  .footer-bottom {
    flex-direction: column;
    text-align: center;
  }

  .footer-legal {
    justify-content: center;
  }
}

/* Small Mobile */

@media (max-width: 480px) {
  .hero h1 {
    font-size: 2.1rem;
  }

  .hero-lead {
    font-size: 1rem;
  }

  .section-header h2,
  .contact-info h2 {
    font-size: 1.75rem;
  }

  .card,
  .industry-card,
  .why-card,
  .proof-card,
  .approach-step,
  .contact-form {
    padding: 1.25rem;
  }

  .footer-legal {
    flex-direction: column;
    gap: 0.5rem;
  }
}

/* Reduced Motion */

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
  }

  .btn:hover,
  .card:hover,
  .industry-card:hover,
  .why-card:hover,
  .proof-card:hover,
  .approach-step:hover {
    transform: none;
  }
}