/* ==========================================================================
   Windvast — shared stylesheet
   Loaded by every page (index, services, about, contact).
   Colors and spacing are defined once as CSS variables at the top —
   change them there and the whole site updates.
   ========================================================================== */

:root {
  /* Colors: deep navy (night sky / deep sea) + teal (offshore water) */
  --color-navy: #0b2545;
  --color-navy-light: #13335c;
  --color-teal: #1b9aaa;
  --color-teal-light: #e7f5f6;
  --color-bg: #f7f9fb;
  --color-text: #1c1f26;
  --color-text-muted: #5b6472;
  --color-border: #e1e6ec;
  --color-white: #ffffff;

  /* Spacing scale */
  --space-1: 0.5rem;
  --space-2: 1rem;
  --space-3: 1.5rem;
  --space-4: 2.5rem;
  --space-5: 4rem;

  --max-width: 1080px;
  --radius: 8px;
}

/* -------------------------------------------------------------------------
   Reset & base
   ------------------------------------------------------------------------- */
* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Arial, sans-serif;
  color: var(--color-text);
  background: var(--color-bg);
  line-height: 1.6;
}

h1, h2, h3 {
  font-family: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Arial, sans-serif;
  color: var(--color-navy);
  line-height: 1.25;
  margin: 0 0 var(--space-2);
}

h1 { font-size: 2.5rem; }
h2 { font-size: 1.75rem; }
h3 { font-size: 1.15rem; }

p {
  margin: 0 0 var(--space-2);
  color: var(--color-text);
}

a {
  color: var(--color-teal);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

ul {
  margin: 0 0 var(--space-2);
  padding-left: 1.25rem;
}

li {
  margin-bottom: var(--space-1);
}

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-3);
}

/* -------------------------------------------------------------------------
   Header / navigation
   ------------------------------------------------------------------------- */
.site-header {
  background: var(--color-navy);
  border-bottom: 1px solid var(--color-navy-light);
}

.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: var(--space-2);
  padding-bottom: var(--space-2);
}

.logo {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 0.25rem;
}

.logo-mark {
  height: 32px;
  width: auto;
  display: block;
}

.logo .tagline {
  display: block;
  font-size: 0.7rem;
  font-weight: 400;
  color: #b7c4d6;
  letter-spacing: 0.03em;
  text-transform: uppercase;
}

.nav-toggle {
  display: none;
  background: none;
  border: 1px solid #37507a;
  color: var(--color-white);
  border-radius: var(--radius);
  padding: 0.4rem 0.7rem;
  font-size: 1rem;
  cursor: pointer;
}

.main-nav ul {
  display: flex;
  gap: var(--space-3);
  list-style: none;
  margin: 0;
  padding: 0;
}

.main-nav a {
  color: #dbe4f0;
  font-weight: 500;
}

.main-nav a:hover,
.main-nav a[aria-current="page"] {
  color: var(--color-white);
  text-decoration: none;
  border-bottom: 2px solid var(--color-teal);
}

/* -------------------------------------------------------------------------
   Hero
   ------------------------------------------------------------------------- */
.hero {
  background: linear-gradient(135deg, var(--color-navy) 0%, var(--color-navy-light) 60%, #1c4a6b 100%);
  color: var(--color-white);
  padding: var(--space-5) 0;
}

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

.hero h1 {
  color: var(--color-white);
}

.hero p {
  color: #cddaeb;
  font-size: 1.1rem;
  max-width: 620px;
}

.hero-actions {
  display: flex;
  gap: var(--space-2);
  margin-top: var(--space-3);
  flex-wrap: wrap;
}

/* -------------------------------------------------------------------------
   Buttons
   ------------------------------------------------------------------------- */
.btn {
  display: inline-block;
  padding: 0.75rem 1.4rem;
  border-radius: var(--radius);
  font-weight: 600;
  text-decoration: none;
  transition: transform 0.1s ease, opacity 0.1s ease;
}

.btn:hover {
  text-decoration: none;
  opacity: 0.9;
}

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

.btn-secondary {
  background: transparent;
  color: var(--color-white);
  border: 1px solid #5878a6;
}

/* -------------------------------------------------------------------------
   Generic page sections
   ------------------------------------------------------------------------- */
.section {
  padding: var(--space-5) 0;
}

.section-alt {
  background: var(--color-white);
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
}

.section-intro {
  max-width: 680px;
  margin-bottom: var(--space-4);
}

.section-intro p {
  color: var(--color-text-muted);
  font-size: 1.05rem;
}

/* -------------------------------------------------------------------------
   Card grid (used on homepage + services)
   ------------------------------------------------------------------------- */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: var(--space-3);
}

.card {
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: var(--space-3);
}

.card h3 {
  margin-bottom: var(--space-1);
}

.card p {
  color: var(--color-text-muted);
  margin-bottom: var(--space-2);
}

.card .card-link {
  font-weight: 600;
}

/* -------------------------------------------------------------------------
   Service blocks (services.html)
   ------------------------------------------------------------------------- */
.service-block {
  padding: var(--space-4) 0;
  border-bottom: 1px solid var(--color-border);
}

.service-block:last-of-type {
  border-bottom: none;
}

.service-block .eyebrow {
  display: inline-block;
  background: var(--color-teal-light);
  color: var(--color-teal);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  padding: 0.25rem 0.6rem;
  border-radius: 999px;
  margin-bottom: var(--space-2);
}

/* -------------------------------------------------------------------------
   About page
   ------------------------------------------------------------------------- */
.about-header {
  display: grid;
  grid-template-columns: 200px 1fr;
  gap: var(--space-4);
  align-items: start;
  margin-bottom: var(--space-4);
}

.about-photo {
  width: 100%;
  aspect-ratio: 1 / 1;
  object-fit: cover;
  border-radius: var(--radius);
  border: 1px solid var(--color-border);
}

.credentials-list {
  list-style: none;
  padding: 0;
  margin: 0;
}

.credentials-list li {
  padding: var(--space-1) 0;
  border-bottom: 1px solid var(--color-border);
}

.credentials-list li:last-child {
  border-bottom: none;
}

/* -------------------------------------------------------------------------
   Contact form
   ------------------------------------------------------------------------- */
.contact-form {
  max-width: 560px;
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: var(--space-4);
}

.form-group {
  margin-bottom: var(--space-3);
}

label {
  display: block;
  font-weight: 600;
  margin-bottom: 0.35rem;
  font-size: 0.9rem;
}

input[type="text"],
input[type="email"],
textarea {
  width: 100%;
  padding: 0.65rem 0.75rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  font-family: inherit;
  font-size: 1rem;
  color: var(--color-text);
  background: var(--color-bg);
}

textarea {
  resize: vertical;
  min-height: 120px;
}

input:focus,
textarea:focus {
  outline: 2px solid var(--color-teal);
  outline-offset: 1px;
}

.contact-alt {
  margin-top: var(--space-4);
  color: var(--color-text-muted);
}

/* -------------------------------------------------------------------------
   Footer
   ------------------------------------------------------------------------- */
.site-footer {
  background: var(--color-navy);
  color: #9fb0c8;
  padding: var(--space-3) 0;
  font-size: 0.9rem;
}

.site-footer a {
  color: #cddaeb;
}

/* -------------------------------------------------------------------------
   Responsive nav (mobile)
   ------------------------------------------------------------------------- */
@media (max-width: 700px) {
  .nav-toggle {
    display: inline-block;
  }

  .main-nav {
    display: none;
    width: 100%;
  }

  .main-nav.is-open {
    display: block;
  }

  .site-header .container {
    flex-wrap: wrap;
  }

  .main-nav ul {
    flex-direction: column;
    gap: 0;
    padding-top: var(--space-2);
  }

  .main-nav li {
    border-top: 1px solid var(--color-navy-light);
  }

  .main-nav a {
    display: block;
    padding: var(--space-2) 0;
  }

  h1 { font-size: 2rem; }

  .hero { padding: var(--space-4) 0; }

  .about-header {
    grid-template-columns: 1fr;
  }

  .about-photo {
    max-width: 200px;
  }
}