:root {
  --ink: #162331;
  --muted: #5f6c7b;
  --line: #d9e1e8;
  --surface: #ffffff;
  --soft: #f4f7f9;
  --accent: #0f7c80;
  --accent-dark: #095e62;
  --warm: #f0b45b;
}

html {
  font-size: 16px;
  min-height: 100%;
  scroll-behavior: smooth;
}

body {
  color: var(--ink);
  background: var(--surface);
  display: flex;
  flex-direction: column;
  font-family: "Segoe UI", Arial, sans-serif;
  margin: 0;
  min-height: 100vh;
}

body > div {
  flex: 1 0 auto;
}

a {
  color: var(--accent-dark);
}

.site-nav {
  background: rgba(255, 255, 255, 0.96);
  border-bottom: 1px solid var(--line);
  box-shadow: 0 10px 28px rgba(22, 35, 49, 0.05);
}

.brand-lockup {
  align-items: center;
  display: inline-flex;
  font-weight: 700;
  gap: 0.65rem;
  letter-spacing: 0;
}

.brand-lockup img {
  height: 34px;
  width: 34px;
}

.nav-link {
  color: var(--ink);
  font-weight: 600;
}

.navbar-toggler {
  border-radius: 6px;
}

.btn {
  border-radius: 6px;
  font-weight: 700;
  padding: 0.78rem 1.1rem;
}

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

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

.btn-outline-dark {
  border-color: #283848;
  color: #283848;
}

.hero-section {
  background:
    linear-gradient(120deg, rgba(244, 247, 249, 0.98), rgba(255, 255, 255, 0.92)),
    url("/images/appsystems-logo.png") right 8vw center / 260px 260px no-repeat;
  border-bottom: 1px solid var(--line);
  min-height: calc(100vh - 76px);
  padding: clamp(4rem, 7vw, 7rem) 0 3rem;
}

.hero-grid {
  align-items: center;
  display: grid;
  gap: clamp(2rem, 5vw, 4rem);
  grid-template-columns: minmax(0, 1.05fr) minmax(320px, 0.7fr);
}

.hero-copy h1,
.section-heading h2,
.split-section h2,
.fit-grid h2 {
  color: var(--ink);
  font-weight: 800;
  letter-spacing: 0;
  line-height: 1.08;
}

.hero-copy h1 {
  font-size: clamp(2.7rem, 6vw, 5.6rem);
  max-width: 950px;
}

.lead {
  color: var(--muted);
  font-size: 1.25rem;
  line-height: 1.65;
  margin: 1.4rem 0 0;
  max-width: 760px;
}

.eyebrow {
  color: var(--accent-dark);
  font-size: 0.82rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  margin-bottom: 0.8rem;
  text-transform: uppercase;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.8rem;
  margin-top: 2rem;
}

.hero-panel,
.inquiry-form,
.principle-grid article,
.use-case-grid article {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 8px;
  box-shadow: 0 18px 45px rgba(22, 35, 49, 0.08);
}

.hero-panel {
  padding: 1.4rem;
}

.panel-header {
  align-items: center;
  border-bottom: 1px solid var(--line);
  display: flex;
  justify-content: space-between;
  padding-bottom: 1rem;
}

.panel-header span {
  color: var(--muted);
  font-weight: 700;
}

.panel-header strong {
  background: #f8ead2;
  border: 1px solid #ebcd9c;
  border-radius: 6px;
  color: #6f4b12;
  padding: 0.35rem 0.55rem;
}

.sprint-list {
  display: grid;
  gap: 1rem;
  list-style: none;
  margin: 1.2rem 0 0;
  padding: 0;
}

.sprint-list li {
  display: grid;
  gap: 0.9rem;
  grid-template-columns: 46px minmax(0, 1fr);
}

.sprint-list li > span {
  align-items: center;
  background: var(--soft);
  border: 1px solid var(--line);
  border-radius: 8px;
  color: var(--accent-dark);
  display: inline-flex;
  font-weight: 800;
  height: 46px;
  justify-content: center;
  width: 46px;
}

.sprint-list strong,
.principle-grid h3,
.use-case-grid h3 {
  color: var(--ink);
}

.sprint-list p,
.principle-grid p,
.use-case-grid p,
.section-heading p {
  color: var(--muted);
  line-height: 1.6;
  margin-bottom: 0;
}

.section-band {
  background: #ffffff;
  padding: clamp(3rem, 7vw, 5.5rem) 0;
}

.muted-band {
  background: var(--soft);
  border-bottom: 1px solid var(--line);
  border-top: 1px solid var(--line);
}

.split-section {
  display: grid;
  gap: clamp(2rem, 5vw, 4rem);
  grid-template-columns: minmax(260px, 0.65fr) minmax(0, 1fr);
}

.split-section h2,
.section-heading h2,
.fit-grid h2 {
  font-size: clamp(2rem, 4vw, 3.3rem);
}

.use-case-grid,
.principle-grid,
.fit-grid,
.form-grid {
  display: grid;
  gap: 1rem;
}

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

.use-case-grid article,
.principle-grid article {
  padding: 1.25rem;
}

.content-section {
  padding: clamp(3rem, 7vw, 5.5rem) 0;
}

.section-heading {
  margin-bottom: 2rem;
  max-width: 820px;
}

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

.principle-grid span {
  color: var(--accent-dark);
  display: block;
  font-size: 0.76rem;
  font-weight: 800;
  margin-bottom: 0.6rem;
  text-transform: uppercase;
}

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

.check-list {
  color: var(--ink);
  display: grid;
  gap: 0.75rem;
  list-style: none;
  margin: 1.2rem 0 0;
  padding: 0;
}

.check-list li {
  border-bottom: 1px solid rgba(22, 35, 49, 0.12);
  padding-bottom: 0.7rem;
}

.check-list li::before {
  color: var(--accent);
  content: "✓";
  font-weight: 900;
  margin-right: 0.5rem;
}

.check-list.subtle li::before {
  color: var(--warm);
  content: "•";
}

.inquiry-section {
  max-width: 980px;
}

.inquiry-form {
  padding: clamp(1.1rem, 3vw, 2rem);
}

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

.form-field {
  display: grid;
  gap: 0.45rem;
}

.form-field.wide {
  grid-column: 1 / -1;
}

label {
  color: var(--ink);
  font-weight: 700;
}

.form-control {
  border-color: #c7d1db;
  border-radius: 6px;
  min-height: 46px;
}

textarea.form-control {
  min-height: 130px;
}

.form-control:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 0.2rem rgba(15, 124, 128, 0.16);
}

.inquiry-form .btn {
  margin-top: 1.2rem;
}

.footer {
  background: #ffffff;
  flex-shrink: 0;
  line-height: 1.4;
  min-height: auto;
  padding: 1.2rem 0;
  white-space: nowrap;
}

@media (max-width: 991px) {
  .hero-section {
    background:
      linear-gradient(120deg, rgba(244, 247, 249, 0.99), rgba(255, 255, 255, 0.96)),
      url("/images/appsystems-logo.png") right 2rem top 2rem / 150px 150px no-repeat;
    min-height: auto;
  }

  .hero-grid,
  .split-section,
  .use-case-grid,
  .principle-grid,
  .fit-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 640px) {
  .hero-copy h1 {
    font-size: 2.55rem;
  }

  .lead {
    font-size: 1.08rem;
  }

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

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

  .brand-lockup span {
    max-width: 190px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
  }
}