/* =====================================================
   SGT PAPI — main.css
   Clean Minimal Personal Brand
   ===================================================== */

/* =====================================================
   1. CSS VARIABLES
   ===================================================== */
:root {
  /* Colors */
  --bg:           #ffffff;
  --bg-subtle:    #f9fafb;
  --bg-muted:     #f3f4f6;
  --text:         #111827;
  --text-muted:   #6b7280;
  --text-light:   #9ca3af;
  --border:       #e5e7eb;
  --accent:       #ea580c;
  --accent-hover: #c2410c;
  --accent-soft:  #fff7ed;

  /* Category Colors */
  --cat-ai:               #2563eb;
  --cat-ai-bg:            #eff6ff;
  --cat-entrepreneurship: #7c3aed;
  --cat-entrepreneurship-bg: #f5f3ff;
  --cat-parenting:        #059669;
  --cat-parenting-bg:     #ecfdf5;
  --cat-travel:           #d97706;
  --cat-travel-bg:        #fffbeb;
  --cat-fitness:          #dc2626;
  --cat-fitness-bg:       #fef2f2;

  /* Typography */
  --font-sans:  'Inter', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-serif: 'Playfair Display', Georgia, 'Times New Roman', serif;

  /* Spacing */
  --space-1:  0.25rem;
  --space-2:  0.5rem;
  --space-3:  0.75rem;
  --space-4:  1rem;
  --space-5:  1.25rem;
  --space-6:  1.5rem;
  --space-8:  2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-20: 5rem;
  --space-24: 6rem;

  /* Layout */
  --container:    1200px;
  --content-max:  720px;
  --radius-sm:    0.25rem;
  --radius:       0.5rem;
  --radius-lg:    0.75rem;
  --radius-full:  9999px;

  /* Transitions */
  --transition: 150ms ease;
}

/* =====================================================
   2. RESET
   ===================================================== */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-sans);
  font-size: 1rem;
  line-height: 1.65;
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

a {
  color: inherit;
  text-decoration: none;
}

ul, ol { list-style: none; }

button {
  cursor: pointer;
  font-family: inherit;
  border: none;
  background: none;
}

input {
  font-family: inherit;
}

/* =====================================================
   3. LAYOUT UTILITIES
   ===================================================== */
.container {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 var(--space-6);
}

@media (max-width: 640px) {
  .container { padding: 0 var(--space-4); }
}

/* =====================================================
   4. TYPOGRAPHY
   ===================================================== */
h1, h2, h3, h4 {
  font-family: var(--font-serif);
  font-weight: 700;
  line-height: 1.2;
  color: var(--text);
  letter-spacing: -0.02em;
}

h1 { font-size: clamp(2rem, 5vw, 3.5rem); }
h2 { font-size: clamp(1.5rem, 3vw, 2.25rem); }
h3 { font-size: clamp(1.125rem, 2vw, 1.5rem); }

p { margin-bottom: var(--space-4); }
p:last-child { margin-bottom: 0; }

/* =====================================================
   5. BUTTONS
   ===================================================== */
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: 0.75rem 1.5rem;
  border-radius: var(--radius);
  font-family: var(--font-sans);
  font-size: 0.9375rem;
  font-weight: 600;
  line-height: 1;
  text-decoration: none;
  transition: all var(--transition);
  white-space: nowrap;
  border: 2px solid transparent;
}

.btn-primary {
  background: var(--accent);
  color: #fff;
  border-color: var(--accent);
}
.btn-primary:hover {
  background: var(--accent-hover);
  border-color: var(--accent-hover);
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(234, 88, 12, 0.3);
}

.btn-ghost {
  background: transparent;
  color: var(--text);
  border-color: var(--border);
}
.btn-ghost:hover {
  background: var(--bg-subtle);
  border-color: var(--text-muted);
}

.btn-outline {
  background: transparent;
  color: var(--accent);
  border-color: var(--accent);
}
.btn-outline:hover {
  background: var(--accent);
  color: #fff;
}

/* =====================================================
   6. CATEGORY CHIPS / BADGES
   ===================================================== */
.cat-chip, .post-cat {
  display: inline-block;
  padding: 0.25rem 0.75rem;
  border-radius: var(--radius-full);
  font-size: 0.75rem;
  font-weight: 600;
  font-family: var(--font-sans);
  letter-spacing: 0.02em;
  text-transform: uppercase;
  text-decoration: none;
  transition: opacity var(--transition);
}

.cat-chip:hover, .post-cat:hover { opacity: 0.85; }

.cat-ai,             .cat-chip.cat-ai             { color: var(--cat-ai); background: var(--cat-ai-bg); }
.cat-entrepreneurship, .cat-chip.cat-entrepreneurship { color: var(--cat-entrepreneurship); background: var(--cat-entrepreneurship-bg); }
.cat-parenting,      .cat-chip.cat-parenting      { color: var(--cat-parenting); background: var(--cat-parenting-bg); }
.cat-travel,         .cat-chip.cat-travel         { color: var(--cat-travel); background: var(--cat-travel-bg); }
.cat-fitness,        .cat-chip.cat-fitness        { color: var(--cat-fitness); background: var(--cat-fitness-bg); }

/* =====================================================
   7. HEADER / NAV
   ===================================================== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--border);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 68px;
  gap: var(--space-6);
}

/* Logo */
.site-logo, .footer-logo {
  font-family: var(--font-serif);
  font-size: 1.375rem;
  font-weight: 900;
  letter-spacing: -0.03em;
  line-height: 1;
  text-decoration: none;
  flex-shrink: 0;
}
.logo-sgt { color: var(--text); }
.logo-papi { color: var(--accent); }

/* Nav Menu */
.nav-menu {
  display: flex;
  align-items: center;
  gap: var(--space-1);
  list-style: none;
}

.nav-link {
  padding: 0.4rem 0.75rem;
  border-radius: var(--radius);
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--text-muted);
  text-decoration: none;
  transition: color var(--transition), background var(--transition);
}
.nav-link:hover, .nav-link.active {
  color: var(--text);
  background: var(--bg-subtle);
}

/* Hamburger */
.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 36px;
  height: 36px;
  padding: 6px;
  border-radius: var(--radius);
  background: none;
  border: none;
  cursor: pointer;
}
.nav-toggle span {
  display: block;
  height: 2px;
  background: var(--text);
  border-radius: 2px;
  transition: all 0.25s ease;
  transform-origin: center;
}
.nav-toggle.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle.open span:nth-child(2) { opacity: 0; transform: scaleX(0); }
.nav-toggle.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* =====================================================
   8. HERO
   ===================================================== */
.hero {
  padding: var(--space-20) 0 var(--space-16);
  text-align: center;
  border-bottom: 1px solid var(--border);
}

.hero-inner {
  max-width: 760px;
  margin: 0 auto;
}

.hero-eyebrow {
  display: inline-block;
  font-size: 0.8125rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: var(--space-4);
}

.hero-headline {
  font-size: clamp(2.75rem, 8vw, 5rem);
  font-weight: 900;
  letter-spacing: -0.04em;
  line-height: 1.05;
  margin-bottom: var(--space-5);
  color: var(--text);
}

.hero-sub {
  font-size: clamp(1rem, 2vw, 1.2rem);
  color: var(--text-muted);
  line-height: 1.7;
  max-width: 560px;
  margin: 0 auto var(--space-8);
}

.hero-actions {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-3);
  flex-wrap: wrap;
  margin-bottom: var(--space-10);
}

.hero-cats {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  flex-wrap: wrap;
}

/* =====================================================
   9. POSTS SECTION (Homepage Grid)
   ===================================================== */
.posts-section {
  padding: var(--space-16) 0;
}

.section-header {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  margin-bottom: var(--space-10);
  gap: var(--space-4);
}

.section-title {
  font-family: var(--font-serif);
  font-size: 1.75rem;
  font-weight: 700;
}

.section-more {
  font-size: 0.9375rem;
  font-weight: 600;
  color: var(--accent);
  text-decoration: none;
  white-space: nowrap;
  transition: color var(--transition);
}
.section-more:hover { color: var(--accent-hover); }

/* Posts Grid */
.posts-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-6);
}

.post-card {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  padding: var(--space-6);
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  transition: border-color var(--transition), box-shadow var(--transition), transform var(--transition);
}

.post-card:hover {
  border-color: var(--text-light);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.07);
  transform: translateY(-2px);
}

.post-card-title {
  font-family: var(--font-serif);
  font-size: 1.25rem;
  font-weight: 700;
  line-height: 1.3;
  letter-spacing: -0.01em;
}
.post-card-title a { text-decoration: none; color: var(--text); }
.post-card-title a:hover { color: var(--accent); }

.post-card-excerpt {
  font-size: 0.9375rem;
  color: var(--text-muted);
  line-height: 1.65;
  flex: 1;
  margin: 0;
}

.post-card-meta {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-size: 0.8125rem;
  color: var(--text-light);
  margin-top: auto;
}

.meta-dot { color: var(--border); }

/* =====================================================
   10. ABOUT TEASER
   ===================================================== */
.about-teaser {
  padding: var(--space-16) 0;
  background: var(--bg-subtle);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.about-inner {
  max-width: 640px;
  margin: 0 auto;
  text-align: center;
}

.section-tag {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: var(--space-3);
}

.about-headline {
  font-size: clamp(1.5rem, 3vw, 2.25rem);
  margin-bottom: var(--space-4);
}

.about-body {
  font-size: 1.0625rem;
  color: var(--text-muted);
  line-height: 1.75;
  margin-bottom: var(--space-8);
}

/* =====================================================
   11. NEWSLETTER SECTION
   ===================================================== */
.newsletter-section {
  padding: var(--space-20) 0;
}

.newsletter-inner {
  max-width: 520px;
  margin: 0 auto;
  text-align: center;
}

.newsletter-headline {
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  margin-bottom: var(--space-4);
}

.newsletter-sub {
  font-size: 1.0625rem;
  color: var(--text-muted);
  margin-bottom: var(--space-8);
}

.newsletter-form .form-row {
  display: flex;
  gap: var(--space-2);
}

.newsletter-form input[type="email"] {
  flex: 1;
  padding: 0.75rem 1rem;
  font-size: 1rem;
  border: 2px solid var(--border);
  border-radius: var(--radius);
  background: var(--bg);
  color: var(--text);
  outline: none;
  transition: border-color var(--transition);
}
.newsletter-form input[type="email"]:focus {
  border-color: var(--accent);
}
.newsletter-form input[type="email"]::placeholder {
  color: var(--text-light);
}

.newsletter-note {
  margin-top: var(--space-4);
  font-size: 0.8125rem;
  color: var(--text-light);
}

/* =====================================================
   12. POSTS LIST PAGE
   ===================================================== */
.page-wrap {
  padding: var(--space-12) 0 var(--space-20);
}

.page-header {
  max-width: var(--content-max);
  margin: 0 auto var(--space-12);
  padding-bottom: var(--space-8);
  border-bottom: 1px solid var(--border);
}

.page-title {
  font-size: clamp(1.75rem, 4vw, 2.75rem);
  margin-bottom: var(--space-3);
}

.page-desc {
  font-size: 1.0625rem;
  color: var(--text-muted);
}

.posts-list {
  max-width: var(--content-max);
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 0;
}

.post-row {
  padding: var(--space-8) 0;
  border-bottom: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.post-row-meta {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  flex-wrap: wrap;
}
.post-row-meta time,
.post-row-meta span:not(.meta-dot):not(.post-cat) {
  font-size: 0.8125rem;
  color: var(--text-light);
}

.post-row-title {
  font-family: var(--font-serif);
  font-size: clamp(1.25rem, 2.5vw, 1.625rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.3;
}
.post-row-title a { color: var(--text); transition: color var(--transition); }
.post-row-title a:hover { color: var(--accent); }

.post-row-excerpt {
  font-size: 1rem;
  color: var(--text-muted);
  line-height: 1.7;
  margin: 0;
}

.post-row-link {
  font-size: 0.9375rem;
  font-weight: 600;
  color: var(--accent);
  text-decoration: none;
  transition: color var(--transition);
  align-self: flex-start;
}
.post-row-link:hover { color: var(--accent-hover); }

/* =====================================================
   13. SINGLE POST
   ===================================================== */
.post-single {
  padding: var(--space-12) 0 var(--space-20);
}

.post-single-wrap {
  max-width: var(--content-max);
  margin: 0 auto;
}

.post-single-header {
  padding-bottom: var(--space-10);
  margin-bottom: var(--space-10);
  border-bottom: 1px solid var(--border);
}

.post-single-title {
  font-size: clamp(1.75rem, 5vw, 3rem);
  line-height: 1.15;
  letter-spacing: -0.03em;
  margin: var(--space-4) 0;
}

.post-single-lead {
  font-size: 1.1875rem;
  color: var(--text-muted);
  line-height: 1.7;
  margin-top: var(--space-4);
  margin-bottom: 0;
}

.post-single-meta {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  flex-wrap: wrap;
  font-size: 0.9375rem;
  color: var(--text-muted);
  margin-top: var(--space-5);
}

/* Post Body Typography */
.post-body {
  font-size: 1.0625rem;
  line-height: 1.8;
  color: var(--text);
}

.post-body h2 {
  font-size: 1.625rem;
  margin: var(--space-10) 0 var(--space-4);
  letter-spacing: -0.02em;
}
.post-body h3 {
  font-size: 1.25rem;
  margin: var(--space-8) 0 var(--space-3);
}

.post-body p {
  margin-bottom: var(--space-5);
}

.post-body a {
  color: var(--accent);
  text-decoration: underline;
  text-decoration-color: rgba(234, 88, 12, 0.3);
  text-underline-offset: 3px;
  transition: text-decoration-color var(--transition);
}
.post-body a:hover { text-decoration-color: var(--accent); }

.post-body ul, .post-body ol {
  padding-left: var(--space-6);
  margin-bottom: var(--space-5);
}
.post-body ul { list-style: disc; }
.post-body ol { list-style: decimal; }
.post-body li { margin-bottom: var(--space-2); }

.post-body blockquote {
  border-left: 4px solid var(--accent);
  padding: var(--space-4) var(--space-6);
  margin: var(--space-8) 0;
  background: var(--bg-subtle);
  border-radius: 0 var(--radius) var(--radius) 0;
}
.post-body blockquote p {
  font-size: 1.125rem;
  font-style: italic;
  color: var(--text-muted);
  margin: 0;
}

.post-body pre {
  background: var(--text);
  color: #f9fafb;
  padding: var(--space-6);
  border-radius: var(--radius);
  overflow-x: auto;
  font-size: 0.875rem;
  line-height: 1.7;
  margin: var(--space-6) 0;
}

.post-body code {
  font-family: 'SF Mono', 'Monaco', 'Inconsolata', monospace;
  font-size: 0.875em;
}

.post-body p code, .post-body li code {
  background: var(--bg-muted);
  padding: 0.125rem 0.4rem;
  border-radius: var(--radius-sm);
  color: var(--accent);
}

.post-body img {
  border-radius: var(--radius);
  margin: var(--space-8) 0;
}

.post-body hr {
  border: none;
  border-top: 2px solid var(--border);
  margin: var(--space-12) 0;
}

/* Tags */
.post-tags {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  flex-wrap: wrap;
  padding: var(--space-8) 0;
  border-top: 1px solid var(--border);
  margin-top: var(--space-10);
}
.tags-label {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--text-muted);
  margin-right: var(--space-2);
}
.tag {
  padding: 0.25rem 0.625rem;
  background: var(--bg-muted);
  border-radius: var(--radius-full);
  font-size: 0.8125rem;
  color: var(--text-muted);
  font-weight: 500;
  text-decoration: none;
  transition: background var(--transition), color var(--transition);
}
.tag:hover { background: var(--text); color: var(--bg); }

/* Post Navigation */
.post-nav {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-4);
  padding: var(--space-8) 0;
  border-top: 1px solid var(--border);
}

.post-nav-item {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
  padding: var(--space-4);
  background: var(--bg-subtle);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  text-decoration: none;
  transition: border-color var(--transition), box-shadow var(--transition);
}
.post-nav-item:hover {
  border-color: var(--text-muted);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.06);
}
.post-nav-next { text-align: right; grid-column: 2; }
.post-nav-prev { grid-column: 1; }

.post-nav-label {
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--text-light);
}
.post-nav-title {
  font-family: var(--font-serif);
  font-size: 1rem;
  font-weight: 700;
  color: var(--text);
  line-height: 1.3;
}

.post-back {
  padding-top: var(--space-6);
}

/* =====================================================
   14. FOOTER
   ===================================================== */
.site-footer {
  background: var(--bg-subtle);
  border-top: 1px solid var(--border);
  padding: var(--space-12) 0 var(--space-8);
}

.footer-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-5);
  text-align: center;
}

.footer-logo {
  font-size: 1.5rem;
}

.footer-tagline {
  font-size: 0.9375rem;
  color: var(--text-muted);
  font-style: italic;
  letter-spacing: 0.02em;
}

.footer-nav {
  display: flex;
  gap: var(--space-6);
  flex-wrap: wrap;
  justify-content: center;
}
.footer-nav a {
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--text-muted);
  text-decoration: none;
  transition: color var(--transition);
}
.footer-nav a:hover { color: var(--text); }

.footer-social {
  display: flex;
  gap: var(--space-4);
}
.footer-social a {
  color: var(--text-muted);
  transition: color var(--transition);
  display: flex;
  align-items: center;
}
.footer-social a:hover { color: var(--accent); }

.footer-copy {
  font-size: 0.8125rem;
  color: var(--text-light);
  margin: 0;
}

/* =====================================================
   15. RESPONSIVE
   ===================================================== */

/* Tablet */
@media (max-width: 1024px) {
  .posts-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

/* Mobile */
@media (max-width: 768px) {
  /* Nav */
  .nav-toggle {
    display: flex;
    order: 3;
  }

  .nav-menu {
    display: none;
    position: absolute;
    top: 68px;
    left: 0;
    right: 0;
    background: var(--bg);
    border-bottom: 1px solid var(--border);
    flex-direction: column;
    gap: 0;
    padding: var(--space-3) var(--space-4);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.08);
  }

  .nav-menu.open {
    display: flex;
  }

  .nav-menu li { width: 100%; }
  .nav-link {
    display: block;
    padding: var(--space-3) var(--space-4);
    width: 100%;
    font-size: 1rem;
  }

  /* Hero */
  .hero {
    padding: var(--space-12) 0 var(--space-10);
  }

  /* Posts Grid */
  .posts-grid {
    grid-template-columns: 1fr;
  }

  /* Hero Actions */
  .hero-actions {
    flex-direction: column;
    align-items: stretch;
  }
  .hero-actions .btn {
    justify-content: center;
  }

  /* Newsletter Form */
  .newsletter-form .form-row {
    flex-direction: column;
  }
  .newsletter-form .btn {
    justify-content: center;
  }

  /* Post Nav */
  .post-nav {
    grid-template-columns: 1fr;
  }
  .post-nav-next { grid-column: 1; text-align: left; }
}

@media (max-width: 480px) {
  .hero-cats {
    gap: var(--space-2);
  }

  .post-single-meta {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--space-1);
  }
  .post-single-meta .meta-dot { display: none; }
}