/**
 * SSG Portfolio - Nature Theme
 * Clean, minimal design inspired by natural elements
 */

/* ============================================
   CSS Variables & Color Palette
   ============================================ */

:root {
  /* Nature Color Palette */
  --color-primary: #2d5a3d;        /* Forest Green */
  --color-primary-light: #4a7c5e;  /* Sage Green */
  --color-accent: #d4a574;         /* Warm Earth/Terracotta */
  --color-accent-light: #e8c4a0;   /* Light Sand */
  --color-background: #f9f8f6;     /* Off-white/Cream */
  --color-surface: #ffffff;        /* Pure White */
  --color-text-primary: #2c2c2c;   /* Dark Charcoal */
  --color-text-secondary: #6b6b6b; /* Medium Gray */
  --color-text-light: #999999;     /* Light Gray */
  --color-border: #e0ddd9;         /* Soft Border */
  --color-hover: #f0ede9;          /* Hover Background */

  /* Typography */
  --font-family-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "Roboto", "Oxygen",
    "Ubuntu", "Cantarell", "Fira Sans", "Droid Sans", "Helvetica Neue", sans-serif;
  --font-family-serif: "Georgia", "Garamond", "Palatino", serif;
  --font-size-base: 16px;
  --font-size-sm: 14px;
  --font-size-lg: 18px;
  --font-size-xl: 20px;
  --font-size-2xl: 28px;
  --font-size-3xl: 36px;
  --line-height-base: 1.6;
  --line-height-tight: 1.3;

  /* Spacing */
  --spacing-xs: 8px;
  --spacing-sm: 12px;
  --spacing-md: 16px;
  --spacing-lg: 24px;
  --spacing-xl: 32px;
  --spacing-2xl: 48px;

  /* Sizing */
  --max-width: 800px;
  --max-width-lg: 1000px;

  /* Border & Shadow */
  --border-radius: 6px;
  --border-radius-lg: 8px;
  --shadow-sm: 0 1px 3px rgba(45, 90, 61, 0.08);
  --shadow-md: 0 4px 12px rgba(45, 90, 61, 0.12);
  --shadow-lg: 0 8px 24px rgba(45, 90, 61, 0.15);

  /* Transitions */
  --transition-fast: 150ms ease-in-out;
  --transition-base: 250ms ease-in-out;
}

/* ============================================
   Reset & Base Styles
   ============================================ */

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

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

/* ============================================
   Typography
   ============================================ */

h1,
h2,
h3,
h4,
h5,
h6 {
  font-family: var(--font-family-serif);
  font-weight: 700;
  line-height: var(--line-height-tight);
  margin-bottom: var(--spacing-md);
  color: var(--color-primary);
}

h1 {
  font-size: var(--font-size-3xl);
  margin-bottom: var(--spacing-lg);
}

h2 {
  font-size: var(--font-size-2xl);
  margin-top: var(--spacing-2xl);
  margin-bottom: var(--spacing-lg);
  padding-bottom: var(--spacing-sm);
  border-bottom: 2px solid var(--color-accent-light);
}

h3 {
  font-size: var(--font-size-xl);
}

h4 {
  font-size: var(--font-size-lg);
}

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

p + p {
  margin-top: var(--spacing-md);
}

a {
  color: var(--color-primary-light);
  text-decoration: none;
  transition: color var(--transition-fast);
  border-bottom: 1px solid transparent;
}

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

a:active {
  color: var(--color-primary);
}

strong {
  font-weight: 600;
  color: var(--color-primary);
}

em {
  font-style: italic;
}

code {
  font-family: "SFMono-Regular", "Consolas", "Liberation Mono", "Menlo", monospace;
  font-size: 0.9em;
  background-color: var(--color-hover);
  color: var(--color-primary);
  padding: 2px 6px;
  border-radius: var(--border-radius);
}

pre {
  background-color: var(--color-primary);
  color: #f0f0f0;
  padding: var(--spacing-lg);
  border-radius: var(--border-radius-lg);
  overflow-x: auto;
  margin-bottom: var(--spacing-lg);
  font-family: "SFMono-Regular", "Consolas", "Liberation Mono", "Menlo", monospace;
  font-size: 0.9em;
  line-height: 1.5;
}

pre code {
  background: none;
  color: inherit;
  padding: 0;
  border-radius: 0;
}

blockquote {
  border-left: 4px solid var(--color-accent);
  padding-left: var(--spacing-lg);
  margin: var(--spacing-lg) 0;
  color: var(--color-text-secondary);
  font-style: italic;
  font-size: var(--font-size-lg);
}

/* ============================================
   Lists
   ============================================ */

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

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

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

/* ============================================
   Tables
   ============================================ */

table {
  width: 100%;
  border-collapse: collapse;
  margin-bottom: var(--spacing-lg);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius-lg);
  overflow: hidden;
}

thead {
  background-color: var(--color-primary);
  color: white;
}

th {
  padding: var(--spacing-md);
  text-align: left;
  font-weight: 600;
}

td {
  padding: var(--spacing-md);
  border-bottom: 1px solid var(--color-border);
}

tbody tr:hover {
  background-color: var(--color-hover);
}

/* ============================================
   Layout Containers
   ============================================ */

.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--spacing-lg);
}

.container-lg {
  max-width: var(--max-width-lg);
}

/* ============================================
   Header & Navigation
   ============================================ */

.site-header {
  background: 
    linear-gradient(135deg, rgba(26, 61, 42, 0.85) 0%, rgba(45, 90, 61, 0.85) 50%, rgba(74, 124, 94, 0.85) 100%),
    radial-gradient(ellipse at 0% 0%, rgba(106, 156, 126, 0.3) 0%, transparent 40%),
    radial-gradient(ellipse at 100% 100%, rgba(106, 156, 126, 0.2) 0%, transparent 40%);
  color: white;
  padding: var(--spacing-2xl) var(--spacing-lg);
  box-shadow: 0 10px 40px rgba(45, 90, 61, 0.2);
  margin-bottom: 0;
  position: relative;
  overflow: hidden;
}

.site-header::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: 
    radial-gradient(circle at 20% 50%, rgba(212, 165, 116, 0.08) 0%, transparent 40%),
    radial-gradient(circle at 80% 80%, rgba(255, 255, 255, 0.04) 0%, transparent 50%);
  pointer-events: none;
}

.site-header::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-image: 
    repeating-linear-gradient(90deg, transparent, transparent 2px, rgba(255, 255, 255, 0.03) 2px, rgba(255, 255, 255, 0.03) 4px),
    repeating-linear-gradient(0deg, transparent, transparent 1px, rgba(255, 255, 255, 0.02) 1px, rgba(255, 255, 255, 0.02) 2px);
  pointer-events: none;
}

.header-container {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-lg);
  max-width: var(--max-width);
  margin: 0 auto;
  position: relative;
  z-index: 1;
}

.site-title {
  font-size: var(--font-size-2xl);
  font-weight: 700;
  letter-spacing: -1px;
  margin: 0;
}

.site-title a {
  color: white;
  border-bottom: none;
  transition: all var(--transition-fast);
}

.site-title a:hover {
  color: var(--color-accent-light);
  text-shadow: 0 0 20px rgba(232, 196, 160, 0.3);
}

.site-description {
  font-size: var(--font-size-lg);
  color: rgba(255, 255, 255, 0.95);
  margin: 0;
  font-weight: 300;
  letter-spacing: 0.5px;
}

.site-nav {
  background: linear-gradient(180deg, rgba(45, 90, 61, 0.95) 0%, rgba(45, 90, 61, 0.92) 100%);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  padding: var(--spacing-md) var(--spacing-lg);
  border-bottom: 1px solid rgba(255, 255, 255, 0.15);
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: 0 8px 32px rgba(45, 90, 61, 0.25);
}

.nav-container {
  max-width: var(--max-width);
  margin: 0 auto;
  display: flex;
  align-items: center;
  gap: var(--spacing-lg);
}

.nav-logo {
  opacity: 0;
  transform: scale(0.8);
  transition: all var(--transition-fast);
  margin-right: auto;
  pointer-events: none;
}

.site-nav.scrolled .nav-logo {
  opacity: 1;
  transform: scale(1);
  pointer-events: auto;
}

.logo-link {
  color: white;
  font-weight: 700;
  font-size: 18px;
  letter-spacing: -1px;
  border-bottom: none;
  transition: all var(--transition-fast);
}

.logo-link:hover {
  color: var(--color-accent-light);
  text-shadow: 0 0 15px rgba(232, 196, 160, 0.3);
}

.nav-list {
  display: flex;
  gap: var(--spacing-xl);
  list-style: none;
  margin: 0;
  padding: 0;
  justify-content: flex-start;
}

.nav-link {
  color: white;
  font-weight: 500;
  font-size: var(--font-size-lg);
  padding: var(--spacing-sm) 0;
  border-bottom: 2px solid transparent;
  transition: all var(--transition-fast);
}

.nav-link:hover {
  color: var(--color-accent-light);
  border-bottom-color: var(--color-accent-light);
}

/* ============================================
   Main Content Area
   ============================================ */

main {
  flex: 1;
  padding: var(--spacing-2xl) var(--spacing-lg);
  max-width: var(--max-width);
  margin: 0 auto;
  width: 100%;
}

.post {
  background: rgba(255, 255, 255, 0.7);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-radius: var(--border-radius-lg);
  padding: var(--spacing-2xl);
  margin-bottom: var(--spacing-2xl);
  border: 1px solid rgba(255, 255, 255, 0.8);
  box-shadow: 0 8px 32px rgba(45, 90, 61, 0.08);
  transition: all var(--transition-base);
  position: relative;
  overflow: hidden;
}

.post::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(135deg, rgba(212, 165, 116, 0.03) 0%, transparent 100%);
  pointer-events: none;
}

.post:hover {
  box-shadow: 0 12px 40px rgba(45, 90, 61, 0.12);
  background: rgba(255, 255, 255, 0.8);
}

.post-header {
  margin-bottom: var(--spacing-xl);
  padding-bottom: var(--spacing-lg);
  border-bottom: 2px solid var(--color-accent-light);
  position: relative;
  z-index: 1;
}

.post-title {
  margin: 0 0 var(--spacing-md) 0;
  font-size: var(--font-size-3xl);
  color: var(--color-primary);
}

.post-content {
  color: var(--color-text-primary);
  line-height: var(--line-height-base);
  position: relative;
  z-index: 1;
}

.post-content > *:last-child {
  margin-bottom: 0;
}

.post-content img {
  max-width: 100%;
  height: auto;
  border-radius: var(--border-radius-lg);
  margin: var(--spacing-lg) 0;
  box-shadow: var(--shadow-md);
}

.post-footer {
  margin-top: var(--spacing-xl);
  padding-top: var(--spacing-lg);
  border-top: 2px solid var(--color-border);
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--spacing-lg);
  position: relative;
  z-index: 1;
}

.post-nav {
  display: flex;
  gap: var(--spacing-md);
  font-weight: 500;
}

.post-nav a {
  padding: var(--spacing-sm) var(--spacing-md);
  background-color: var(--color-primary);
  color: white;
  border-radius: var(--border-radius);
  border-bottom: none;
  transition: background-color var(--transition-fast);
}

.post-nav a:hover {
  background-color: var(--color-accent);
  color: var(--color-primary);
}

/* ============================================
   Posts Listing Section
   ============================================ */

.posts-section {
  margin-bottom: var(--spacing-2xl);
  max-width: var(--max-width-lg);
  margin-left: auto;
  margin-right: auto;
  padding: 0 var(--spacing-lg);
}

.posts-section h1 {
  margin-bottom: var(--spacing-xl);
  font-size: var(--font-size-3xl);
  text-align: center;
}

.posts-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: var(--spacing-2xl);
  margin-bottom: var(--spacing-2xl);
}

.posts-grid.list {
  grid-template-columns: 1fr;
}

.no-posts {
  text-align: center;
  padding: var(--spacing-2xl);
  color: var(--color-text-secondary);
  font-style: italic;
  font-size: var(--font-size-lg);
}

/* ============================================
   Post Cards
   ============================================ */

.post-card {
  background: rgba(255, 255, 255, 0.7);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-radius: var(--border-radius-lg);
  padding: var(--spacing-lg);
  border: 1px solid rgba(255, 255, 255, 0.8);
  box-shadow: 0 8px 32px rgba(45, 90, 61, 0.08);
  transition: all var(--transition-base);
  display: flex;
  flex-direction: column;
  height: 100%;
  position: relative;
  overflow: hidden;
  min-height: 320px;
  margin-bottom: var(--spacing-lg);
}

.post-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(135deg, rgba(212, 165, 116, 0.05) 0%, transparent 100%);
  pointer-events: none;
}

.post-card:hover {
  border-color: var(--color-accent);
  box-shadow: 0 16px 48px rgba(45, 90, 61, 0.15);
  background: rgba(255, 255, 255, 0.9);
}

.post-card-content {
  flex: 1;
  display: flex;
  flex-direction: column;
  position: relative;
  z-index: 1;
}

.post-card-title {
  font-size: var(--font-size-xl);
  margin: 0 0 var(--spacing-md) 0;
  color: var(--color-primary);
  font-family: var(--font-family-serif);
  line-height: var(--line-height-tight);
}

.post-card-title a {
  color: var(--color-primary);
  border-bottom: 2px solid transparent;
  transition: all var(--transition-fast);
}

.post-card-title a:hover {
  color: var(--color-accent);
  border-bottom-color: var(--color-accent);
}

.post-card-date {
  font-size: var(--font-size-sm);
  color: var(--color-text-light);
  margin-bottom: var(--spacing-md);
}

.post-card-description {
  color: var(--color-text-secondary);
  margin-bottom: var(--spacing-md);
  flex: 1;
  font-size: var(--font-size-base);
  line-height: var(--line-height-base);
}

.post-card-tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-sm);
  margin-bottom: var(--spacing-md);
}

.tag {
  display: inline-block;
  background: linear-gradient(135deg, rgba(212, 165, 116, 0.2) 0%, rgba(232, 196, 160, 0.2) 100%);
  color: var(--color-primary);
  padding: 4px 12px;
  border-radius: 20px;
  font-size: var(--font-size-sm);
  font-weight: 500;
  transition: all var(--transition-fast);
  border: 1px solid rgba(212, 165, 116, 0.3);
}

.tag:hover {
  background-color: var(--color-accent);
  color: white;
}

.post-card-footer {
  display: flex;
  justify-content: flex-end;
  align-items: center;
  margin-top: var(--spacing-lg);
  padding-top: var(--spacing-md);
  border-top: 1px solid rgba(212, 165, 116, 0.2);
  position: relative;
  z-index: 2;
}

.post-card-link {
  display: inline-flex;
  align-items: center;
  padding: 6px 14px;
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-light) 100%);
  color: white;
  border-radius: 20px;
  border: none;
  border-bottom: none;
  font-weight: 600;
  font-size: 13px;
  letter-spacing: 0.5px;
  transition: all var(--transition-fast);
  box-shadow: 0 4px 12px rgba(45, 90, 61, 0.15);
}

.post-card-link:hover {
  background: linear-gradient(135deg, var(--color-accent) 0%, #c4945f 100%);
  color: white;
  box-shadow: 0 6px 18px rgba(212, 165, 116, 0.25);
}

/* ============================================
   Post Metadata
   ============================================ */

.post-meta {
  display: flex;
  gap: var(--spacing-lg);
  align-items: center;
  flex-wrap: wrap;
  color: var(--color-text-secondary);
  font-size: var(--font-size-sm);
}

.post-date {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

.post-date::before {
  content: "📅";
  font-size: 1.1em;
}

.post-tags {
  display: flex;
  gap: var(--spacing-sm);
  flex-wrap: wrap;
}

.post-tags::before {
  content: "🏷️";
  font-size: 1.1em;
}

/* ============================================
   Contact Form
   ============================================ */

.contact-form {
  max-width: 600px;
  margin: var(--spacing-2xl) 0;
  display: flex;
  flex-direction: column;
  gap: var(--spacing-lg);
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
}

.form-group label {
  font-weight: 600;
  color: var(--color-primary);
  font-size: var(--font-size-base);
}

.form-group input,
.form-group textarea {
  padding: var(--spacing-md);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius);
  font-family: var(--font-family-sans);
  font-size: var(--font-size-base);
  color: var(--color-text-primary);
  background-color: var(--color-surface);
  transition: all var(--transition-fast);
}

.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(45, 90, 61, 0.1);
  background-color: rgba(245, 250, 247, 1);
}

.form-group input::placeholder,
.form-group textarea::placeholder {
  color: var(--color-text-light);
}

.submit-btn {
  padding: var(--spacing-md) var(--spacing-lg);
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-light) 100%);
  color: white;
  border: none;
  border-radius: var(--border-radius);
  font-weight: 600;
  font-size: var(--font-size-base);
  cursor: pointer;
  transition: all var(--transition-fast);
  box-shadow: 0 4px 15px rgba(45, 90, 61, 0.2);
}

.submit-btn:hover {
  background: linear-gradient(135deg, var(--color-accent) 0%, #c4945f 100%);
  box-shadow: 0 6px 20px rgba(212, 165, 116, 0.3);
  transform: translateY(-2px);
}

.submit-btn:active {
  transform: translateY(0);
}

/* ============================================
   Footer
   ============================================ */

.site-footer {
  background-color: var(--color-primary);
  color: white;
  padding: var(--spacing-2xl) 0;
  margin-top: var(--spacing-2xl);
  text-align: center;
  border-top: 4px solid var(--color-accent);
}

.site-footer strong {
  color: var(--color-accent-light);
  font-weight: 700;
}

.footer-container {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
}

.footer-note {
  color: rgba(255, 255, 255, 0.9);
  margin: 0;
  font-size: var(--font-size-sm);
}

.footer-note a {
  color: var(--color-accent-light);
  border-bottom-color: var(--color-accent-light);
}

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

/* ============================================
   Responsive Design
   ============================================ */

@media (max-width: 768px) {
  :root {
    --font-size-3xl: 28px;
    --font-size-2xl: 24px;
    --spacing-2xl: 32px;
    --spacing-xl: 24px;
  }

  .nav-list {
    gap: var(--spacing-md);
    padding: 0 var(--spacing-md);
  }

  .nav-link {
    font-size: var(--font-size-base);
  }

  .post {
    padding: var(--spacing-lg);
  }

  .post-footer {
    flex-direction: column;
    align-items: flex-start;
  }

  .posts-grid {
    grid-template-columns: 1fr;
  }

  .post-card {
    padding: var(--spacing-lg);
  }

  .post-meta {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--spacing-sm);
  }
}

@media (max-width: 480px) {
  :root {
    --font-size-3xl: 24px;
    --font-size-2xl: 20px;
    --spacing-2xl: 24px;
    --spacing-xl: 16px;
    --spacing-lg: 16px;
  }

  body {
    font-size: 15px;
  }

  .site-header {
    padding: var(--spacing-xl) 0;
  }

  .header-container {
    gap: var(--spacing-md);
  }

  .site-title {
    font-size: var(--font-size-xl);
  }

  .site-description {
    font-size: var(--font-size-base);
  }

  .site-nav {
    padding: var(--spacing-sm) 0;
  }

  .nav-list {
    gap: var(--spacing-md);
    flex-direction: column;
  }

  .nav-link {
    font-size: var(--font-size-base);
    padding: var(--spacing-sm);
  }

  .container {
    padding: 0 var(--spacing-md);
  }

  .post {
    padding: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
  }

  .post-title {
    font-size: var(--font-size-2xl);
  }

  h2 {
    font-size: var(--font-size-xl);
  }

  blockquote {
    padding-left: var(--spacing-md);
    font-size: var(--font-size-base);
  }

  code {
    font-size: 0.85em;
  }

  pre {
    padding: var(--spacing-md);
    font-size: 0.8em;
  }
}

/* ============================================
   Print Styles
   ============================================ */

@media print {
  body {
    background-color: white;
  }

  .site-nav,
  .post-nav {
    display: none;
  }

  a {
    color: var(--color-primary);
  }

  code,
  pre {
    background-color: #f5f5f5;
    border: 1px solid var(--color-border);
  }
}

/* ============================================
   Accessibility
   ============================================ */

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

@media (prefers-color-scheme: dark) {
  :root {
    --color-background: #1a1a1a;
    --color-surface: #2d2d2d;
    --color-text-primary: #f0f0f0;
    --color-text-secondary: #b0b0b0;
    --color-text-light: #666666;
    --color-border: #3a3a3a;
    --color-hover: #3a3a3a;
  }

  code {
    background-color: var(--color-hover);
  }

  .post-card {
    background-color: var(--color-surface);
  }
}