/* ==========================================================================
   Complementary Cognition — Base Styles
   Font: Raleway | Colours: black text, #61CE70 accent | Max-width: 1140px
   ========================================================================== */

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

/* --- Custom Properties --- */
:root {
  --color-primary: #000000;
  --color-accent: #61CE70;
  --color-text: #333333;
  --color-text-light: #666666;
  --color-bg: #ffffff;
  --color-bg-alt: #f8f8f8;
  --color-border: #e0e0e0;
  --font-family: "Raleway", "Segoe UI", system-ui, sans-serif;
  --font-weight-regular: 400;
  --font-weight-medium: 500;
  --font-weight-semibold: 600;
  --max-width: 1140px;
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 1.5rem;
  --spacing-lg: 2.5rem;
  --spacing-xl: 4rem;
}

/* --- Base Typography --- */
html {
  font-size: 100%;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-family);
  font-weight: var(--font-weight-regular);
  color: var(--color-text);
  background-color: var(--color-bg);
  line-height: 1.7;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4, h5, h6 {
  color: var(--color-primary);
  font-weight: var(--font-weight-semibold);
  line-height: 1.3;
  margin-bottom: var(--spacing-sm);
}

h1 { font-size: 1.875rem; }
h2 { font-size: 1.5rem; }
h3 { font-size: 1.25rem; }
h4 { font-size: 1.125rem; }

p {
  margin-bottom: var(--spacing-sm);
}

a {
  color: var(--color-primary);
  text-decoration: none;
  transition: color 0.2s ease;
}

a:hover, a:focus {
  color: var(--color-accent);
}

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

ul, ol {
  padding-left: var(--spacing-md);
  margin-bottom: var(--spacing-sm);
}

blockquote {
  border-left: 3px solid var(--color-accent);
  padding-left: var(--spacing-md);
  margin: var(--spacing-md) 0;
  color: var(--color-text-light);
  font-style: italic;
}

hr {
  border: none;
  border-top: 1px solid var(--color-border);
  margin: var(--spacing-lg) 0;
}

/* --- Layout --- */
.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--spacing-md);
}

/* --- Site Header --- */
.site-header {
  border-bottom: 1px solid var(--color-border);
  padding: var(--spacing-sm) 0;
}

/* --- Navigation (centred logo, nav items split left/right) --- */
.site-nav {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-md);
}

.site-nav ul {
  display: flex;
  flex-wrap: nowrap;
  list-style: none;
  gap: var(--spacing-xs);
  padding: 0;
  margin: 0;
  align-items: center;
}

.nav-left,
.nav-right {
  flex: 1 1 0;
  min-width: 0;
}

.nav-left {
  justify-content: flex-end;
}

.nav-right {
  justify-content: flex-start;
}

.site-brand {
  flex-shrink: 0;
  display: block;
  text-decoration: none;
}

.site-logo {
  height: 120px;
  width: auto;
  display: block;
}

.site-nav li {
  flex: 1 1 0;
  min-width: 0;
  text-align: center;
}

.site-nav a {
  display: block;
  padding: var(--spacing-xs) var(--spacing-sm);
  font-size: 0.9rem;
  font-weight: var(--font-weight-medium);
  color: var(--color-primary);
  border-radius: 4px;
  transition: background-color 0.2s ease, color 0.2s ease;
}

.site-nav a:hover,
.site-nav a:focus {
  color: var(--color-accent);
  background-color: var(--color-bg-alt);
}

.site-nav a[aria-current="page"] {
  color: var(--color-accent);
}

/* Mobile nav toggle */
.nav-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--spacing-xs);
  color: var(--color-primary);
}

.nav-toggle svg {
  width: 24px;
  height: 24px;
  stroke: currentColor;
  fill: none;
  stroke-width: 2;
  stroke-linecap: round;
}

/* --- Hero Section --- */
.hero {
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
  min-height: 400px;
  display: flex;
  align-items: center;
  width: 100%;
}

/* Remove gap between header and hero */
.site-header + main .hero:first-child {
  margin-top: 0;
}

.hero-overlay {
  width: 100%;
  background: rgba(0, 0, 0, 0.5);
  padding: var(--spacing-xl) 0;
  min-height: 400px;
  display: flex;
  align-items: center;
}

.hero h1 {
  color: #ffffff;
  font-size: 2.5rem;
  font-weight: var(--font-weight-semibold);
  margin-bottom: var(--spacing-sm);
}

.hero-subtitle {
  color: rgba(255, 255, 255, 0.9);
  font-size: 1.25rem;
  font-weight: var(--font-weight-medium);
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

/* --- Callout Box --- */
.callout-box {
  display: flex;
  gap: var(--spacing-lg);
  align-items: flex-start;
  background: var(--color-bg-alt);
  border-radius: 6px;
  padding: var(--spacing-lg);
  margin: var(--spacing-lg) 0;
}

.callout-image {
  flex-shrink: 0;
  width: 160px;
}

.callout-image img {
  width: 160px;
  height: 160px;
  object-fit: cover;
  border-radius: 50%;
  margin: 0;
}

.callout-content {
  flex: 1;
  min-width: 0;
}

.callout-content h2 {
  margin-top: 0;
}

.callout-content p:last-child {
  margin-bottom: 0;
}

/* --- Main Content --- */
main {
  min-height: 60vh;
}

/* When hero is first child of main, remove header border */
body:has(main > .hero:first-child) .site-header {
  border-bottom: none;
}

.page-content {
  padding: var(--spacing-xl) 0;
}

.page-content .container {
  max-width: 900px;
}

/* Article */
article h1 {
  font-size: 1.875rem;
  font-weight: var(--font-weight-medium);
  margin-bottom: var(--spacing-md);
}

article img {
  margin: var(--spacing-md) 0;
  border-radius: 4px;
}

/* --- Portrait Image --- */
.portrait {
  width: 200px;
  height: 200px;
  object-fit: cover;
  border-radius: 50%;
  margin: 0 auto var(--spacing-lg) auto;
}

/* --- Post Meta --- */
.post-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--spacing-sm);
  margin-bottom: var(--spacing-lg);
  font-size: 0.875rem;
  color: var(--color-text-light);
}

.post-meta time {
  font-weight: var(--font-weight-medium);
}

.post-categories {
  display: flex;
  flex-wrap: wrap;
  list-style: none;
  gap: var(--spacing-xs);
  padding: 0;
  margin: 0;
}

.post-categories li {
  background-color: var(--color-bg-alt);
  padding: 0.2em 0.7em;
  border-radius: 3px;
  font-size: 0.8rem;
  font-weight: var(--font-weight-medium);
  color: var(--color-text-light);
}

/* --- Post List (News page) --- */
.post-list {
  list-style: none;
  padding: 0;
}

.post-list li {
  padding: var(--spacing-md) 0;
  border-bottom: 1px solid var(--color-border);
}

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

.post-list a {
  font-size: 1.1rem;
  font-weight: var(--font-weight-medium);
}

.post-list time {
  display: block;
  font-size: 0.85rem;
  color: var(--color-text-light);
  margin-top: 0.25em;
}

/* --- Contact Form --- */
form {
  width: 100%;
}

form div {
  margin-bottom: var(--spacing-md);
}

form label {
  display: block;
  font-size: 0.9rem;
  font-weight: var(--font-weight-medium);
  margin-bottom: var(--spacing-xs);
  color: var(--color-primary);
}

form input[type="text"],
form input[type="email"],
form textarea {
  width: 100%;
  padding: 0.6rem 0.8rem;
  font-family: var(--font-family);
  font-size: 1rem;
  border: 1px solid var(--color-border);
  border-radius: 4px;
  background-color: var(--color-bg);
  color: var(--color-text);
  transition: border-color 0.2s ease;
}

form input[type="text"]:focus,
form input[type="email"]:focus,
form textarea:focus {
  outline: none;
  border-color: var(--color-accent);
  box-shadow: 0 0 0 2px rgba(97, 206, 112, 0.2);
}

form textarea {
  resize: vertical;
}

form button[type="submit"] {
  display: inline-block;
  padding: 0.7rem 2rem;
  font-family: var(--font-family);
  font-size: 0.95rem;
  font-weight: var(--font-weight-semibold);
  color: var(--color-bg);
  background-color: var(--color-primary);
  border: none;
  border-radius: 4px;
  cursor: pointer;
  transition: background-color 0.2s ease;
}

form button[type="submit"]:hover,
form button[type="submit"]:focus {
  background-color: var(--color-accent);
}

form button[type="submit"]:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

/* --- Form Status Messages --- */
#form-status.form-status {
  margin-top: var(--spacing-md);
  padding: 0.8rem 1rem;
  border-radius: 4px;
  font-size: 0.95rem;
  font-weight: var(--font-weight-medium);
}

#form-status.form-status--success {
  background-color: rgba(97, 206, 112, 0.15);
  color: #2a7d35;
  border: 1px solid rgba(97, 206, 112, 0.4);
}

#form-status.form-status--error {
  background-color: rgba(220, 53, 69, 0.1);
  color: #a4212a;
  border: 1px solid rgba(220, 53, 69, 0.3);
}

/* --- Social Links Section --- */
.social-links {
  margin-top: var(--spacing-xl);
  padding-top: var(--spacing-lg);
  border-top: 1px solid var(--color-border);
  text-align: center;
}

/* --- Social Links --- */
article p a[href*="linkedin"],
article p a[href*="twitter"],
article p a[href*="instagram"] {
  display: inline-block;
  padding: 0.3em 0.8em;
  margin-right: var(--spacing-xs);
  margin-bottom: var(--spacing-xs);
  font-size: 0.875rem;
  font-weight: var(--font-weight-medium);
  border: 1px solid var(--color-border);
  border-radius: 4px;
  transition: border-color 0.2s ease, background-color 0.2s ease;
}

article p a[href*="linkedin"]:hover,
article p a[href*="twitter"]:hover,
article p a[href*="instagram"]:hover {
  border-color: var(--color-accent);
  background-color: var(--color-bg-alt);
}

/* --- Site Footer --- */
.site-footer {
  border-top: 1px solid var(--color-border);
  padding: var(--spacing-lg) 0;
  margin-top: var(--spacing-xl);
  text-align: center;
  font-size: 0.85rem;
  color: var(--color-text-light);
}

/* --- 404 Page --- */
.error-404 {
  text-align: center;
  padding: var(--spacing-xl) 0;
}

/* --- Responsive --- */
@media (max-width: 768px) {
  h1 { font-size: 1.5rem; }
  h2 { font-size: 1.25rem; }

  .site-header {
    position: relative;
  }

  .nav-toggle {
    display: block;
    position: absolute;
    top: var(--spacing-sm);
    right: var(--spacing-md);
    z-index: 10;
  }

  .site-nav {
    flex-direction: column;
    gap: var(--spacing-sm);
  }

  .site-logo {
    height: 80px;
  }

  .site-nav .nav-left,
  .site-nav .nav-right {
    display: none;
    flex-direction: column;
    width: 100%;
    flex: none;
    gap: 0;
  }

  .site-nav.open .nav-left,
  .site-nav.open .nav-right {
    display: flex;
  }

  .site-nav.open {
    order: unset;
  }

  .site-nav.open .nav-left {
    order: 2;
  }

  .site-nav.open .nav-right {
    order: 3;
  }

  .site-brand {
    order: 1;
  }

  .site-nav li a {
    padding: var(--spacing-sm);
    border-bottom: 1px solid var(--color-border);
    text-align: center;
  }

  .page-content {
    padding: var(--spacing-lg) 0;
  }

  .hero {
    min-height: 280px;
  }

  .hero-overlay {
    min-height: 280px;
    padding: var(--spacing-lg) 0;
  }

  .hero h1 {
    font-size: 1.75rem;
  }

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

  .callout-box {
    flex-direction: column;
    align-items: center;
    text-align: center;
  }

  .callout-image {
    width: 120px;
  }

  .callout-image img {
    width: 120px;
    height: 120px;
  }
}

@media (min-width: 769px) {
  .nav-toggle {
    display: none;
  }
}