/* ============================================
   Digital Naturalist — Portfolio Design System
   ============================================ */

@import url('https://fonts.googleapis.com/css2?family=Newsreader:ital,opsz,wght@0,6..72,300;0,6..72,400;0,6..72,500;0,6..72,600;1,6..72,400&family=Space+Grotesk:wght@300;400;500;600;700&display=swap');

/* --- Tokens --- */
:root {
  --surface:                 #0f1511;
  --surface-container-lowest:#0a100c;
  --surface-container-low:   #171d19;
  --surface-container:       #1b211d;
  --surface-container-high:  #252b27;
  --surface-container-highest:#303632;
  --surface-dim:             #0f1511;

  --primary:        #2ae500;
  --primary-hover:  #79ff5b;
  --on-primary:     #053900;
  --primary-container:#043400;
  --on-primary-container:#1daa00;

  --secondary:      #a1d494;
  --tertiary:       #cfc5b2;
  --on-surface:     #dee4dd;
  --on-surface-variant:#c0c9bf;
  --outline:        #8d928c;
  --outline-variant:#434843;

  --font-scholar: 'Newsreader', Georgia, serif;
  --font-system:  'Space Grotesk', 'SF Mono', monospace;

  --spacing-2:  0.5rem;
  --spacing-3:  0.75rem;
  --spacing-4:  1rem;
  --spacing-6:  2rem;
  --spacing-8:  2.5rem;
  --spacing-12: 3.5rem;
  --spacing-16: 5rem;
  --spacing-24: 7rem;
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
}

body {
  background: var(--surface);
  color: var(--tertiary);
  font-family: var(--font-system);
  font-size: 1rem;
  line-height: 1.7;
  min-height: 100vh;
}

::selection {
  background: var(--primary);
  color: var(--on-primary);
}

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

/* --- Layout --- */
.site-wrapper {
  max-width: 960px;
  margin: 0 auto;
  padding: var(--spacing-12) var(--spacing-6);
  padding-right: var(--spacing-24);
  padding-left: var(--spacing-12);
}

@media (max-width: 768px) {
  .site-wrapper {
    padding: var(--spacing-6) var(--spacing-4);
  }
}

/* --- Navigation --- */
.site-nav {
  display: flex;
  align-items: center;
  gap: var(--spacing-6);
  padding-bottom: var(--spacing-8);
  border-bottom: 1px solid rgba(67, 72, 67, 0.15);
  margin-bottom: var(--spacing-12);
}

.nav-prompt {
  color: var(--primary);
  font-family: var(--font-system);
  font-weight: 600;
  font-size: 0.85rem;
  letter-spacing: 0.05em;
  user-select: none;
}

.nav-links {
  display: flex;
  gap: var(--spacing-4);
  list-style: none;
}

.nav-links a {
  color: var(--on-surface-variant);
  font-family: var(--font-system);
  font-size: 0.85rem;
  font-weight: 400;
  letter-spacing: 0.03em;
  padding: var(--spacing-2) var(--spacing-3);
  transition: color 0.2s, background 0.2s;
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--primary);
}

.nav-links a.active {
  background: var(--surface-container);
}

/* --- Typography --- */
h1, h2, h3, h4 {
  font-family: var(--font-scholar);
  color: var(--on-surface);
  font-weight: 400;
  line-height: 1.2;
}

h1 { font-size: 3.5rem; letter-spacing: -0.02em; }
h2 { font-size: 2rem; }
h3 { font-size: 1.4rem; }

.label-sm {
  font-family: var(--font-system);
  font-size: 0.7rem;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--outline);
}

.label-md {
  font-family: var(--font-system);
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--primary);
}

/* --- Terminal Window Card --- */
.terminal-card {
  background: var(--surface-container);
  border-radius: 0;
  box-shadow:
    inset 1px 1px 0 rgba(192, 201, 191, 0.1),
    inset -1px -1px 0 var(--surface-container-lowest);
  margin-bottom: var(--spacing-6);
}

.terminal-header {
  background: var(--surface-container-high);
  padding: var(--spacing-3) var(--spacing-6);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.terminal-title {
  font-family: var(--font-system);
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--primary);
  letter-spacing: 0.04em;
}

.terminal-dots {
  display: flex;
  gap: 6px;
}

.terminal-dots span {
  width: 8px;
  height: 8px;
  background: var(--surface-container-highest);
  display: block;
}

.terminal-body {
  padding: var(--spacing-6);
}

/* --- Hero --- */
.hero {
  padding: var(--spacing-16) 0 var(--spacing-12);
}

.hero-greeting {
  font-family: var(--font-system);
  font-size: 0.85rem;
  color: var(--primary);
  margin-bottom: var(--spacing-4);
  letter-spacing: 0.06em;
}

.hero h1 {
  margin-bottom: var(--spacing-4);
}

.hero-subtitle {
  font-family: var(--font-scholar);
  font-size: 1.25rem;
  font-style: italic;
  color: var(--on-surface-variant);
  max-width: 540px;
  line-height: 1.6;
}

/* --- About Section --- */
.about-section {
  background: var(--surface-container-low);
  padding: var(--spacing-12) var(--spacing-6);
  margin: 0 calc(-1 * var(--spacing-12)) 0 calc(-1 * var(--spacing-12));
  padding-left: var(--spacing-12);
  padding-right: var(--spacing-24);
}

@media (max-width: 768px) {
  .about-section {
    margin: 0 calc(-1 * var(--spacing-4));
    padding: var(--spacing-6) var(--spacing-4);
  }
}

.about-grid {
  display: grid;
  grid-template-columns: 200px 1fr;
  gap: var(--spacing-8);
  align-items: start;
}

@media (max-width: 640px) {
  .about-grid { grid-template-columns: 1fr; }
}

.photo-placeholder {
  width: 200px;
  height: 240px;
  background: var(--surface-container);
  box-shadow:
    inset 1px 1px 0 rgba(192, 201, 191, 0.1),
    inset -1px -1px 0 var(--surface-container-lowest);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--outline);
  font-family: var(--font-system);
  font-size: 0.75rem;
  letter-spacing: 0.1em;
}

.about-text p {
  margin-bottom: var(--spacing-4);
  max-width: 520px;
}

.about-text .label-sm {
  margin-bottom: var(--spacing-3);
}

/* --- Log Divider --- */
.log-divider {
  color: var(--outline-variant);
  font-family: var(--font-system);
  font-size: 0.7rem;
  letter-spacing: 0.3em;
  padding: var(--spacing-6) 0;
  user-select: none;
  opacity: 0.6;
}

/* --- Thoughts / Log Entries --- */
.log-list {
  list-style: none;
}

.log-entry {
  padding: var(--spacing-6) 0;
  border-bottom: 1px solid rgba(67, 72, 67, 0.15);
  cursor: pointer;
  transition: background 0.2s;
}

.log-entry:hover {
  background: var(--surface-container-low);
  margin: 0 calc(-1 * var(--spacing-6));
  padding-left: var(--spacing-6);
  padding-right: var(--spacing-6);
}

.log-entry-meta {
  display: flex;
  align-items: center;
  gap: var(--spacing-4);
  margin-bottom: var(--spacing-2);
}

.log-entry-date {
  font-family: var(--font-system);
  font-size: 0.7rem;
  color: var(--outline);
  letter-spacing: 0.06em;
}

.log-entry-tag {
  font-family: var(--font-system);
  font-size: 0.7rem;
  color: var(--tertiary);
  background: var(--surface-container-highest);
  padding: 2px 8px;
}

.log-entry h3 {
  margin-bottom: var(--spacing-2);
}

.log-entry h3 a {
  color: var(--on-surface);
  transition: color 0.2s;
}

.log-entry h3 a:hover {
  color: var(--primary);
}

.log-entry-excerpt {
  font-size: 0.95rem;
  color: var(--on-surface-variant);
  max-width: 580px;
}

/* --- Thought Reader --- */
.thought-reader {
  display: none;
}

.thought-reader.active {
  display: block;
}

.thought-reader-back {
  font-family: var(--font-system);
  font-size: 0.8rem;
  color: var(--outline);
  cursor: pointer;
  background: none;
  border: 1px solid rgba(67, 72, 67, 0.2);
  padding: var(--spacing-2) var(--spacing-4);
  margin-bottom: var(--spacing-6);
  transition: color 0.2s, border-color 0.2s;
}

.thought-reader-back:hover {
  color: var(--primary);
  border-color: var(--primary);
}

.thought-content {
  font-family: var(--font-scholar);
  font-size: 1.1rem;
  line-height: 1.8;
  color: var(--tertiary);
}

.thought-content h1,
.thought-content h2,
.thought-content h3 {
  margin-top: var(--spacing-8);
  margin-bottom: var(--spacing-4);
}

.thought-content h1 { font-size: 2.2rem; }
.thought-content h2 { font-size: 1.6rem; }

.thought-content p {
  margin-bottom: var(--spacing-4);
  max-width: 620px;
}

.thought-content code {
  font-family: var(--font-system);
  font-size: 0.85em;
  background: var(--surface-container-high);
  padding: 2px 6px;
  color: var(--secondary);
}

.thought-content pre {
  background: var(--surface-container-high);
  padding: var(--spacing-4);
  overflow-x: auto;
  margin-bottom: var(--spacing-4);
}

.thought-content pre code {
  background: none;
  padding: 0;
}

.thought-content img {
  max-width: 100%;
  height: auto;
  display: block;
  margin: var(--spacing-6) 0;
  filter: grayscale(1);
  box-shadow:
    inset 1px 1px 0 rgba(192, 201, 191, 0.1),
    inset -1px -1px 0 var(--surface-container-lowest);
}

.thought-content blockquote {
  border-left: 2px solid var(--primary);
  padding-left: var(--spacing-4);
  color: var(--on-surface-variant);
  font-style: italic;
  margin-bottom: var(--spacing-4);
}

.thought-content ul, .thought-content ol {
  padding-left: var(--spacing-6);
  margin-bottom: var(--spacing-4);
}

.thought-content li {
  margin-bottom: var(--spacing-2);
}

/* --- Contact --- */
.contact-row {
  display: flex;
  align-items: baseline;
  gap: var(--spacing-4);
  padding: var(--spacing-3) 0;
}

.contact-label {
  font-family: var(--font-system);
  font-size: 0.75rem;
  color: var(--outline);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  min-width: 80px;
}

.contact-value {
  font-family: var(--font-system);
  font-size: 0.95rem;
  color: var(--tertiary);
}

.contact-value a {
  color: var(--primary);
}

/* --- Buttons --- */
.btn-primary {
  display: inline-block;
  background: linear-gradient(145deg, var(--primary), var(--on-primary-container));
  color: var(--on-primary);
  font-family: var(--font-system);
  font-size: 0.85rem;
  font-weight: 600;
  padding: var(--spacing-3) var(--spacing-6);
  border: none;
  cursor: pointer;
  letter-spacing: 0.04em;
  transition: background 0.2s;
}

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

.btn-secondary {
  display: inline-block;
  background: none;
  color: var(--secondary);
  font-family: var(--font-system);
  font-size: 0.85rem;
  font-weight: 500;
  padding: var(--spacing-3) var(--spacing-6);
  border: 1px solid rgba(67, 72, 67, 0.2);
  cursor: pointer;
  transition: color 0.2s, border-color 0.2s;
}

.btn-secondary:hover {
  color: var(--primary);
  border-color: var(--primary);
}

/* --- Footer --- */
.site-footer {
  margin-top: var(--spacing-16);
  padding-top: var(--spacing-6);
  border-top: 1px solid rgba(67, 72, 67, 0.15);
  font-size: 0.75rem;
  color: var(--outline);
  font-family: var(--font-system);
  display: flex;
  justify-content: space-between;
}

@media (max-width: 640px) {
  .site-footer { flex-direction: column; gap: var(--spacing-2); }
}

/* ============================
   Mobile Responsiveness
   ============================ */

@media (max-width: 768px) {
  h1 { font-size: 2.2rem; }
  h2 { font-size: 1.5rem; }
  h3 { font-size: 1.2rem; }

  .hero { padding: var(--spacing-8) 0 var(--spacing-6); }
  .hero-subtitle { font-size: 1.1rem; }

  .site-nav {
    flex-wrap: wrap;
    gap: var(--spacing-3);
    padding-bottom: var(--spacing-4);
    margin-bottom: var(--spacing-6);
  }

  .nav-links { gap: var(--spacing-2); }

  .about-grid {
    grid-template-columns: 1fr;
    justify-items: center;
    text-align: left;
  }

  .photo-placeholder {
    width: 160px;
    height: 200px;
  }

  .about-text p { max-width: 100%; }

  .log-divider {
    font-size: 0.6rem;
    letter-spacing: 0.15em;
    overflow: hidden;
    white-space: nowrap;
    text-overflow: ellipsis;
  }

  .log-entry:hover {
    margin: 0;
    padding-left: 0;
    padding-right: 0;
  }

  .log-entry-excerpt { max-width: 100%; }

  .thought-content p { max-width: 100%; }
  .thought-content h1 { font-size: 1.8rem; }
  .thought-content h2 { font-size: 1.3rem; }

  .contact-row {
    flex-direction: column;
    gap: var(--spacing-2);
  }

  .terminal-header { padding: var(--spacing-2) var(--spacing-4); }
  .terminal-body { padding: var(--spacing-4); }
}

@media (max-width: 400px) {
  html { font-size: 15px; }
  h1 { font-size: 1.8rem; }

  .site-wrapper { padding: var(--spacing-4) var(--spacing-3); }

  .nav-links a {
    font-size: 0.8rem;
    padding: var(--spacing-2);
  }
}