/* Tufteian Personal Site Styles */
/* Mustapha Isa — mustaphaisa.com */

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

/* ===== Design Tokens ===== */
:root {
  /* Colors — Warm Neutrals */
  --color-bg: #FDFCFA;
  --color-surface: #F7F6F3;
  --color-text: #2C2A27;
  --color-text-muted: #6B6860;
  --color-text-faint: #9B978F;
  --color-accent: #B45309;
  --color-border: #E8E6E0;

  /* Typography */
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", system-ui, sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, monospace;
  --font-serif: Georgia, Cambria, "Times New Roman", Times, serif;

  /* Spacing */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-12: 3rem;
  --space-16: 4rem;

  /* Layout */
  --max-width: 42rem;
}

/* ===== Base Styles ===== */
html {
  font-size: 16px;
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-sans);
  font-size: 1rem;
  line-height: 1.6;
  color: var(--color-text);
  background: var(--color-bg);
  -webkit-font-smoothing: antialiased;
}

a {
  color: var(--color-text);
  text-decoration: none;
  transition: color 0.15s ease;
}

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

/* ===== Navigation ===== */
.nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--space-6) var(--space-8);
  max-width: 64rem;
  margin: 0 auto;
}

.nav-name {
  font-weight: 500;
  font-size: 0.9375rem;
  letter-spacing: 0.01em;
}

.nav-links {
  display: flex;
  gap: var(--space-6);
}

.nav-links a {
  font-size: 0.8125rem;
  color: var(--color-text-muted);
}

.nav-links a:hover {
  color: var(--color-text);
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* ===== Main Content ===== */
main {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: var(--space-8);
}

/* ===== Hero Section ===== */
.hero {
  padding: var(--space-16) 0;
  border-bottom: 1px solid var(--color-border);
  margin-bottom: var(--space-12);
}

.hero-label {
  font-size: 0.6875rem;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: var(--color-accent);
  margin-bottom: var(--space-4);
}

.hero-statement {
  font-family: var(--font-serif);
  font-size: 1.75rem;
  font-weight: 400;
  line-height: 1.35;
  margin-bottom: var(--space-6);
  max-width: 38rem;
}

.hero-sub {
  font-size: 0.9375rem;
  color: var(--color-text-muted);
  line-height: 1.7;
  max-width: 34rem;
}

/* ===== Sections ===== */
.section {
  padding: var(--space-12) 0;
  border-bottom: 1px solid var(--color-border);
}

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

.section-title {
  font-size: 0.6875rem;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: var(--color-text-muted);
  margin-bottom: var(--space-8);
  font-weight: 400;
}

/* ===== Writing Section ===== */
.writing-grid {
  display: flex;
  flex-direction: column;
  gap: var(--space-6);
}

.writing-item {
  display: grid;
  grid-template-columns: 5rem 1fr auto;
  gap: var(--space-4);
  align-items: baseline;
  padding: var(--space-3) 0;
  border-bottom: 1px solid var(--color-border);
  cursor: pointer;
  transition: background 0.15s ease;
}

.writing-item:hover {
  background: var(--color-surface);
  margin: 0 calc(-1 * var(--space-3));
  padding-left: var(--space-3);
  padding-right: var(--space-3);
}

.writing-item:last-child {
  border-bottom: none;
}

.writing-date {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--color-text-faint);
}

.writing-title {
  font-size: 0.9375rem;
  font-weight: 500;
}

.writing-desc {
  display: none;
}

.writing-type {
  font-size: 0.6875rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-text-faint);
}

/* Expanded view for larger screens */
@media (min-width: 640px) {
  .writing-item {
    grid-template-columns: 5rem 1fr 1fr auto;
  }
  
  .writing-desc {
    display: block;
    font-size: 0.8125rem;
    color: var(--color-text-muted);
  }
}

/* ===== Projects Section ===== */
.projects-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-8);
}

.project-item {
  padding-left: var(--space-4);
  border-left: 3px solid var(--color-border);
  transition: border-color 0.15s ease;
}

.project-item:hover {
  border-left-color: var(--color-accent);
}

.project-header {
  display: flex;
  align-items: baseline;
  gap: var(--space-4);
  margin-bottom: var(--space-2);
}

.project-title {
  font-size: 1rem;
  font-weight: 500;
}

.project-status {
  font-size: 0.6875rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-accent);
}

.project-desc {
  font-size: 0.875rem;
  color: var(--color-text-muted);
  line-height: 1.65;
  margin-bottom: var(--space-3);
}

.project-tags {
  display: flex;
  gap: var(--space-2);
  flex-wrap: wrap;
}

.project-tags span {
  font-size: 0.6875rem;
  color: var(--color-text-faint);
  padding: var(--space-1) var(--space-2);
  background: var(--color-surface);
  border-radius: 2px;
}

/* ===== About Section ===== */
.about-content {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

.about-content p {
  font-size: 0.9375rem;
  line-height: 1.7;
  color: var(--color-text);
}

.about-content p:first-child {
  font-size: 1rem;
}

.contact {
  margin-top: var(--space-8);
  padding-top: var(--space-6);
  border-top: 1px solid var(--color-border);
  display: flex;
  gap: var(--space-6);
}

.contact a {
  font-size: 0.8125rem;
  color: var(--color-text-muted);
}

.contact a:hover {
  color: var(--color-accent);
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* ===== Footer ===== */
.footer {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: var(--space-12) var(--space-8);
  text-align: center;
}

.footer p {
  font-size: 0.75rem;
  color: var(--color-text-faint);
}

/* ===== Responsive ===== */
@media (max-width: 640px) {
  .nav {
    flex-direction: column;
    gap: var(--space-4);
    padding: var(--space-4);
  }

  .nav-links {
    gap: var(--space-4);
  }

  main {
    padding: var(--space-4);
  }

  .hero {
    padding: var(--space-8) 0;
  }

  .hero-statement {
    font-size: 1.375rem;
  }

  .writing-item {
    grid-template-columns: 1fr;
    gap: var(--space-1);
  }

  .writing-date {
    order: 2;
  }

  .writing-type {
    display: none;
  }
}