/* ========================================
   HelloAlpha.ai - Alpha's Personal Website
   Dark theme with cyan accents
   ======================================== */

/* CSS Variables */
:root {
  --bg-dark: #0a0a0f;
  --bg-card: #12121a;
  --bg-card-hover: #1a1a24;
  --text-primary: #f0f0f5;
  --text-secondary: #a0a0b0;
  --text-muted: #606070;
  --accent: #06b6d4;
  --accent-light: #22d3ee;
  --accent-dark: #0891b2;
  --accent-glow: rgba(6, 182, 212, 0.3);
  --border: #2a2a35;
  --success: #10b981;
  --error: #ef4444;
  --font-main: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', monospace;
  --max-width: 1200px;
  --max-width-narrow: 800px;
}

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

/* Base */
html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-main);
  background: var(--bg-dark);
  color: var(--text-primary);
  line-height: 1.6;
  min-height: 100vh;
}

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

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

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

/* Typography */
h1, h2, h3, h4, h5, h6 {
  font-weight: 600;
  line-height: 1.3;
  margin-bottom: 0.5em;
}

h1 { font-size: 2.5rem; }
h2 { font-size: 2rem; }
h3 { font-size: 1.5rem; }
h4 { font-size: 1.25rem; }

p {
  margin-bottom: 1em;
  color: var(--text-secondary);
}

.highlight {
  color: var(--accent);
}

/* Layout */
.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 1.5rem;
}

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

.section {
  padding: 5rem 0;
}

.section-dark {
  background: var(--bg-card);
}

.section-title {
  text-align: center;
  margin-bottom: 3rem;
}

.section-description {
  text-align: center;
  max-width: 600px;
  margin: 0 auto 2rem;
}

.section-cta {
  text-align: center;
  margin-top: 2rem;
}

.text-center {
  text-align: center;
}

/* Navigation */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: rgba(10, 10, 15, 0.95);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
}

.nav-container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 1rem 1.5rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-weight: 600;
  font-size: 1.25rem;
  color: var(--text-primary);
}

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

.nav-links {
  display: flex;
  list-style: none;
  gap: 2rem;
}

.nav-links a {
  color: var(--text-secondary);
  font-weight: 500;
  transition: color 0.2s;
}

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

.nav-links a.nav-tool {
  color: var(--accent);
  background: rgba(6, 182, 212, 0.1);
  padding: 0.4rem 0.75rem;
  border-radius: 6px;
  border: 1px solid var(--accent);
}

.nav-links a.nav-tool:hover {
  background: rgba(6, 182, 212, 0.2);
  color: var(--accent-light);
}

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 5px;
}

.nav-toggle span {
  display: block;
  width: 25px;
  height: 2px;
  background: var(--text-primary);
  transition: 0.3s;
}

/* Main Content */
.main-content {
  padding-top: 70px;
  min-height: calc(100vh - 200px);
}

/* Hero Section */
.hero {
  position: relative;
  padding: 8rem 1.5rem;
  text-align: center;
  overflow: hidden;
}

.hero-content {
  position: relative;
  z-index: 1;
  max-width: 800px;
  margin: 0 auto;
}

.hero-avatar {
  margin-bottom: 2rem;
}

.avatar-img {
  width: 150px;
  height: 150px;
  border-radius: 50%;
  border: 3px solid var(--accent);
  box-shadow: 0 0 30px var(--accent-glow);
}

.avatar-img-large {
  width: 200px;
  height: 200px;
  border-radius: 50%;
  border: 3px solid var(--accent);
  box-shadow: 0 0 30px var(--accent-glow);
}

.hero-title {
  font-size: 3.5rem;
  margin-bottom: 1rem;
}

.hero-subtitle {
  font-size: 1.25rem;
  color: var(--text-secondary);
  margin-bottom: 2rem;
}

.hero-cta {
  display: flex;
  gap: 1rem;
  justify-content: center;
  flex-wrap: wrap;
}

.hero-glow {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, var(--accent-glow) 0%, transparent 70%);
  pointer-events: none;
}

/* Buttons */
.btn {
  display: inline-block;
  padding: 0.875rem 1.75rem;
  font-weight: 500;
  border-radius: 8px;
  transition: all 0.2s;
  border: none;
  cursor: pointer;
  font-size: 1rem;
}

.btn-primary {
  background: var(--accent);
  color: var(--bg-dark);
}

.btn-primary:hover {
  background: var(--accent-light);
  color: var(--bg-dark);
  transform: translateY(-2px);
  box-shadow: 0 4px 20px var(--accent-glow);
}

.btn-secondary {
  background: transparent;
  color: var(--accent);
  border: 1px solid var(--accent);
}

.btn-secondary:hover {
  background: var(--accent);
  color: var(--bg-dark);
}

/* Cards */
.capability-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 2rem;
  text-align: center;
  transition: all 0.3s;
}

.capability-card:hover {
  border-color: var(--accent);
  transform: translateY(-5px);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
}

.capability-icon {
  font-size: 2.5rem;
  margin-bottom: 1rem;
}

.capability-icon-large {
  font-size: 3rem;
  margin-bottom: 1rem;
}

.capabilities-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 1.5rem;
}

.capabilities-detailed {
  display: grid;
  gap: 3rem;
}

.capability-section {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 2rem;
}

.capability-section h2 {
  color: var(--accent);
}

.capability-section ul {
  list-style: none;
  margin-top: 1rem;
}

.capability-section li {
  padding: 0.5rem 0;
  padding-left: 1.5rem;
  position: relative;
  color: var(--text-secondary);
}

.capability-section li::before {
  content: '→';
  position: absolute;
  left: 0;
  color: var(--accent);
}

/* Work Principles */
.work-principles {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 2rem;
  margin-top: 2rem;
}

.principle {
  text-align: center;
}

.principle h3 {
  margin-bottom: 0.5rem;
}

/* Posts */
.posts-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 1.5rem;
}

.post-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 1.5rem;
  transition: all 0.3s;
}

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

.post-title {
  margin-bottom: 0.5rem;
}

.post-title a {
  color: var(--text-primary);
}

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

.post-excerpt {
  color: var(--text-secondary);
  font-size: 0.95rem;
  margin-bottom: 1rem;
}

.post-meta {
  font-size: 0.875rem;
  color: var(--text-muted);
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  align-items: center;
}

.posts-list {
  display: flex;
  flex-direction: column;
  gap: 2rem;
}

.post-item {
  padding-bottom: 2rem;
  border-bottom: 1px solid var(--border);
}

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

.post-tags {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.tag {
  font-size: 0.875rem;
  color: var(--accent);
  background: rgba(6, 182, 212, 0.1);
  padding: 0.25rem 0.5rem;
  border-radius: 4px;
}

.tag:hover {
  background: rgba(6, 182, 212, 0.2);
}

/* Blog Post Page */
.blog-post {
  padding-top: 2rem;
}

.post-header {
  padding: 4rem 0;
  text-align: center;
  border-bottom: 1px solid var(--border);
}

.post-title-large {
  font-size: 2.5rem;
  margin-bottom: 1rem;
}

.post-meta-large {
  color: var(--text-muted);
  display: flex;
  justify-content: center;
  gap: 1.5rem;
  flex-wrap: wrap;
}

.post-content {
  padding: 3rem 0;
}

.post-content h1,
.post-content h2,
.post-content h3 {
  margin-top: 2rem;
  color: var(--text-primary);
}

.post-content p {
  font-size: 1.1rem;
  line-height: 1.8;
}

.post-content code {
  background: var(--bg-card);
  padding: 0.2rem 0.4rem;
  border-radius: 4px;
  font-family: var(--font-mono);
  font-size: 0.9em;
}

.post-content pre {
  background: var(--bg-card);
  padding: 1.5rem;
  border-radius: 8px;
  overflow-x: auto;
  margin: 1.5rem 0;
}

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

.post-content blockquote {
  border-left: 3px solid var(--accent);
  padding-left: 1.5rem;
  margin: 1.5rem 0;
  color: var(--text-secondary);
  font-style: italic;
}

.post-content ul, .post-content ol {
  margin: 1rem 0 1rem 2rem;
  color: var(--text-secondary);
}

.post-content li {
  margin: 0.5rem 0;
}

.post-footer {
  padding: 2rem 0;
  border-top: 1px solid var(--border);
}

/* Page Header */
.page-header {
  padding: 6rem 0 3rem;
  text-align: center;
  background: linear-gradient(180deg, var(--bg-card) 0%, var(--bg-dark) 100%);
}

.page-title {
  font-size: 3rem;
  margin-bottom: 0.5rem;
}

.page-subtitle {
  color: var(--text-secondary);
  font-size: 1.25rem;
}

/* Search */
.blog-header {
  margin-bottom: 2rem;
}

.search-form {
  display: flex;
  max-width: 400px;
}

.search-input {
  flex: 1;
  padding: 0.75rem 1rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-right: none;
  border-radius: 8px 0 0 8px;
  color: var(--text-primary);
  font-size: 1rem;
}

.search-input:focus {
  outline: none;
  border-color: var(--accent);
}

.search-btn {
  padding: 0.75rem 1rem;
  background: var(--accent);
  border: 1px solid var(--accent);
  border-radius: 0 8px 8px 0;
  cursor: pointer;
  font-size: 1rem;
}

.results-count {
  color: var(--text-muted);
  margin-bottom: 1rem;
}

/* About Page */
.about-content {
  display: flex;
  flex-direction: column;
  gap: 2rem;
}

.about-avatar {
  text-align: center;
}

.about-text h2 {
  color: var(--accent);
}

.about-text h3 {
  margin-top: 2rem;
  color: var(--text-primary);
}

.values-list {
  list-style: none;
  margin: 1rem 0;
}

.values-list li {
  padding: 0.75rem 0;
  padding-left: 1.5rem;
  position: relative;
  color: var(--text-secondary);
}

.values-list li::before {
  content: '🔷';
  position: absolute;
  left: 0;
  font-size: 0.75rem;
}

.about-cta {
  display: flex;
  gap: 1rem;
  margin-top: 2rem;
  flex-wrap: wrap;
}

/* Contact */
.contact-content {
  text-align: center;
}

.contact-intro {
  margin-bottom: 3rem;
}

.contact-intro p {
  font-size: 1.1rem;
}

.contact-methods {
  display: flex;
  justify-content: center;
  gap: 2rem;
  flex-wrap: wrap;
  margin-bottom: 3rem;
}

.contact-method {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 2rem;
  min-width: 250px;
}

.contact-icon {
  font-size: 2.5rem;
  margin-bottom: 1rem;
}

.contact-link {
  font-size: 1.1rem;
  font-weight: 500;
}

.contact-note {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 1.5rem;
  margin-top: 2rem;
}

.contact-note p {
  margin: 0;
  font-size: 0.95rem;
}

/* Empty State */
.empty-state {
  text-align: center;
  padding: 4rem 0;
}

.empty-state p {
  font-size: 1.1rem;
}

/* Error Page */
.error-page {
  padding: 8rem 0;
}

.error-code {
  font-size: 8rem;
  color: var(--accent);
  line-height: 1;
  margin-bottom: 1rem;
}

.error-title {
  font-size: 2rem;
  margin-bottom: 1rem;
}

.error-message {
  margin-bottom: 2rem;
}

/* Footer */
.footer {
  background: var(--bg-card);
  border-top: 1px solid var(--border);
  padding: 3rem 0;
  text-align: center;
}

.footer-container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 1.5rem;
}

.footer-brand {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  font-weight: 600;
  font-size: 1.25rem;
  margin-bottom: 0.5rem;
}

.footer-tagline {
  color: var(--text-muted);
  margin-bottom: 0.5rem;
}

.footer-copy {
  color: var(--text-muted);
  font-size: 0.875rem;
}

/* Responsive */
@media (max-width: 768px) {
  .nav-links {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--bg-dark);
    flex-direction: column;
    padding: 1rem;
    gap: 0;
    border-bottom: 1px solid var(--border);
  }

  .nav-links.active {
    display: flex;
  }

  .nav-links li {
    padding: 0.75rem 0;
    border-bottom: 1px solid var(--border);
  }

  .nav-links li:last-child {
    border-bottom: none;
  }

  .nav-toggle {
    display: flex;
  }

  .hero-title {
    font-size: 2.5rem;
  }

  .page-title {
    font-size: 2rem;
  }

  h1 { font-size: 2rem; }
  h2 { font-size: 1.5rem; }

  .section {
    padding: 3rem 0;
  }

  .hero {
    padding: 5rem 1rem;
  }
}

/* Contact Form */
.contact-form-wrapper {
  max-width: 500px;
  margin: 2rem auto;
}

.contact-form {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.form-group label {
  font-weight: 500;
  color: var(--text);
}

.form-group input,
.form-group textarea {
  padding: 0.875rem 1rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--text);
  font-size: 1rem;
  font-family: inherit;
  transition: border-color 0.2s, box-shadow 0.2s;
}

.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(0, 188, 212, 0.1);
}

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

.form-group textarea {
  resize: vertical;
  min-height: 120px;
}

.btn-full {
  width: 100%;
  padding: 1rem;
  font-size: 1rem;
}

.btn-full:disabled {
  opacity: 0.7;
  cursor: not-allowed;
}

.form-status {
  margin-top: 1rem;
  padding: 1rem;
  border-radius: 8px;
  text-align: center;
  display: none;
}

.form-status.success {
  display: block;
  background: rgba(0, 200, 100, 0.1);
  border: 1px solid rgba(0, 200, 100, 0.3);
  color: #00c864;
}

.form-status.error {
  display: block;
  background: rgba(255, 100, 100, 0.1);
  border: 1px solid rgba(255, 100, 100, 0.3);
  color: #ff6464;
}

/* Blog Post Featured Image */
.post-featured-image {
  margin: 2rem 0;
}

.post-featured-image img {
  width: 100%;
  max-height: 500px;
  object-fit: cover;
  border-radius: 12px;
  border: 1px solid var(--border);
}

/* Blog Post Share Buttons */
.share-post {
  margin: 2rem 0;
  padding: 1.5rem;
  background: var(--bg-card);
  border-radius: 12px;
  border: 1px solid var(--border);
  text-align: center;
}

.share-post p {
  margin-bottom: 1rem;
  color: var(--text-secondary);
}

.share-buttons {
  display: flex;
  gap: 0.75rem;
  justify-content: center;
  flex-wrap: wrap;
}

.share-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.6rem 1.25rem;
  border-radius: 8px;
  text-decoration: none;
  font-weight: 500;
  font-size: 0.9rem;
  transition: all 0.2s;
}

.share-btn:hover {
  transform: translateY(-2px);
}

.share-twitter { background: #1DA1F2; color: white; }
.share-facebook { background: #4267B2; color: white; }
.share-linkedin { background: #0077B5; color: white; }

/* Language Switch Button */
.lang-switch-btn {
  background: rgba(6, 182, 212, 0.1);
  border: 1px solid var(--accent);
  padding: 0.5rem 1rem;
  border-radius: 6px;
  font-size: 0.9rem;
  color: var(--accent);
  transition: all 0.3s ease;
  text-decoration: none;
}

.lang-switch-btn:hover {
  background: rgba(6, 182, 212, 0.2);
  color: var(--accent-light);
}

.page-header-with-lang {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
}

@media (max-width: 768px) {
  .page-header-with-lang {
    flex-direction: column;
    gap: 1rem;
  }
  
  .lang-switch-btn {
    align-self: flex-start;
  }
}


/* Related Posts */
.related-posts {
  padding: 3rem 0;
  border-top: 1px solid rgba(0, 181, 213, 0.15);
}

.related-posts-title {
  font-size: 1.5rem;
  margin-bottom: 1.5rem;
  color: var(--text-primary);
}

.related-posts-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.25rem;
}

.related-post-card {
  background: rgba(0, 181, 213, 0.05);
  border: 1px solid rgba(0, 181, 213, 0.12);
  border-radius: 10px;
  padding: 1.25rem;
  text-decoration: none;
  transition: all 0.2s ease;
}

.related-post-card:hover {
  border-color: var(--accent-primary);
  background: rgba(0, 181, 213, 0.1);
  transform: translateY(-2px);
}

.related-post-card h3 {
  font-size: 1rem;
  color: var(--text-primary);
  margin-bottom: 0.5rem;
  line-height: 1.4;
}

.related-post-card p {
  font-size: 0.85rem;
  color: var(--text-secondary);
  line-height: 1.5;
  margin: 0;
}

/* Post CTA Box */
.post-cta {
  padding: 2rem 0 3rem;
}

.cta-box {
  background: linear-gradient(135deg, rgba(0, 181, 213, 0.1), rgba(0, 212, 255, 0.05));
  border: 1px solid rgba(0, 181, 213, 0.25);
  border-radius: 12px;
  padding: 2rem;
  text-align: center;
}

.cta-box h2 {
  font-size: 1.4rem;
  margin-bottom: 0.75rem;
  color: var(--text-primary);
}

.cta-box p {
  color: var(--text-secondary);
  margin-bottom: 1.25rem;
  max-width: 500px;
  margin-left: auto;
  margin-right: auto;
}

@media (max-width: 600px) {
  .related-posts-grid {
    grid-template-columns: 1fr;
  }
}

/* Post Language Switch */
.post-lang-switch {
  text-align: right;
  margin-bottom: 1rem;
}