/* Under the Furnace - Design System & Styling */
:root {
  --bg-primary: #0a0c10;
  --bg-secondary: #121620;
  --bg-card: rgba(22, 27, 38, 0.75);
  --border-color: rgba(255, 102, 0, 0.2);

  --accent-orange: #ff5500;
  --accent-orange-glow: rgba(255, 85, 0, 0.35);
  --accent-cyan: #00f0ff;
  --accent-cyan-glow: rgba(0, 240, 255, 0.25);
  --text-main: #f0f4f8;
  --text-muted: #9aa8b9;
  --text-dim: #5c6b7e;

  --font-sans: 'Inter', system-ui, -apple-system, sans-serif;
  --font-mono: 'JetBrains Mono', monospace;

  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 18px;
  --transition: all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
}

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

body {
  background-color: var(--bg-primary);
  color: var(--text-main);
  font-family: var(--font-sans);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  overflow-x: hidden;
  line-height: 1.7;
  background-image: 
    radial-gradient(circle at 15% 20%, rgba(255, 85, 0, 0.05) 0%, transparent 45%),
    radial-gradient(circle at 85% 80%, rgba(0, 240, 255, 0.04) 0%, transparent 45%),
    linear-gradient(to bottom, rgba(10, 12, 16, 0.95), var(--bg-primary));
}

.cyber-grid {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background-size: 40px 40px;
  background-image: 
    linear-gradient(to right, rgba(255, 255, 255, 0.012) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(255, 255, 255, 0.012) 1px, transparent 1px);
  pointer-events: none;
  z-index: 0;
}

/* Header & Navbar */
header {
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  background: rgba(10, 12, 16, 0.88);
  border-bottom: 1px solid var(--border-color);
}

.nav-container {
  max-width: 1000px;
  margin: 0 auto;
  padding: 1rem 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  text-decoration: none;
  color: var(--text-main);
  font-weight: 800;
  font-size: 1.15rem;
  letter-spacing: 0.05em;
}

.brand-icon {
  width: 32px;
  height: 32px;
  background: linear-gradient(135deg, var(--accent-orange), #b32400);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 0 12px var(--accent-orange-glow);
  color: #fff;
}

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

.nav-links {
  display: flex;
  gap: 0.5rem;
  list-style: none;
}

.nav-btn {
  background: transparent;
  border: 1px solid transparent;
  color: var(--text-muted);
  padding: 0.5rem 1rem;
  border-radius: var(--radius-sm);
  font-family: var(--font-mono);
  font-size: 0.85rem;
  cursor: pointer;
  transition: var(--transition);
}

.nav-btn:hover {
  color: var(--text-main);
  background: rgba(255, 255, 255, 0.04);
}

.nav-btn.active {
  color: var(--accent-orange);
  background: rgba(255, 85, 0, 0.1);
  border-color: rgba(255, 85, 0, 0.3);
}

.user-status {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.btn-primary {
  background: linear-gradient(135deg, var(--accent-orange), #d94400);
  color: #fff;
  border: none;
  padding: 0.55rem 1.2rem;
  border-radius: var(--radius-sm);
  font-weight: 600;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  cursor: pointer;
  transition: var(--transition);
}

.btn-primary:hover {
  transform: translateY(-1px);
  box-shadow: 0 4px 15px var(--accent-orange-glow);
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.1);
  color: var(--text-main);
  padding: 0.55rem 1.2rem;
  border-radius: var(--radius-sm);
  font-family: var(--font-mono);
  font-size: 0.85rem;
  cursor: pointer;
  transition: var(--transition);
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: var(--accent-cyan);
  color: var(--accent-cyan);
}

.avatar-badge {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  background: rgba(255, 255, 255, 0.04);
  padding: 0.35rem 0.8rem;
  border-radius: 20px;
  border: 1px solid rgba(255, 255, 255, 0.08);
  font-family: var(--font-mono);
  font-size: 0.85rem;
}

.avatar-icon {
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: var(--accent-cyan);
  color: #000;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 0.75rem;
}

/* Page Containers */
main {
  flex: 1;
  max-width: 900px;
  width: 100%;
  margin: 0 auto;
  padding: 3rem 1.5rem;
  position: relative;
  z-index: 1;
}

.page {
  display: none;
  animation: fadeIn 0.3s ease-out forwards;
}

.page.active {
  display: block;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(6px); }
  to { opacity: 1; transform: translateY(0); }
}

/* Manifesto Single Consolidated Essay */
.manifesto-article {
  max-width: 800px;
  margin: 0 auto;
  padding: 1rem 0;
}

.manifesto-header {
  margin-bottom: 2.5rem;
  text-align: left;
}

.manifesto-tag {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  letter-spacing: 0.1em;
  color: var(--accent-orange);
  margin-bottom: 0.75rem;
  display: block;
}

.manifesto-header h1 {
  font-size: clamp(2.2rem, 4vw, 3.2rem);
  font-weight: 800;
  line-height: 1.2;
  margin-bottom: 0.75rem;
  letter-spacing: -0.02em;
}

.manifesto-header .subtitle {
  font-size: 1.15rem;
  color: var(--text-muted);
}

.manifesto-body {
  color: #d1d9e2;
  font-size: 1.05rem;
}

.lead-paragraph {
  font-size: 1.18rem;
  line-height: 1.8;
  color: #ffffff;
  margin-bottom: 2rem;
}

.divider {
  border: 0;
  height: 1px;
  background: linear-gradient(90deg, var(--accent-orange), transparent);
  margin: 2.5rem 0;
  opacity: 0.4;
}

.manifesto-body h2 {
  font-family: var(--font-mono);
  font-size: 1.25rem;
  color: var(--accent-orange);
  margin: 2.5rem 0 1rem 0;
  letter-spacing: -0.01em;
}

.manifesto-body p {
  margin-bottom: 1.5rem;
}

.manifesto-actions {
  display: flex;
  gap: 1rem;
  margin-top: 3.5rem;
  padding-top: 2rem;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
}

/* Community Board */
.community-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 2rem;
  flex-wrap: wrap;
  gap: 1rem;
}

.categories-bar {
  display: flex;
  gap: 0.75rem;
  margin-bottom: 2rem;
  overflow-x: auto;
  padding-bottom: 0.5rem;
}

.category-tab {
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.08);
  color: var(--text-muted);
  padding: 0.5rem 1.1rem;
  border-radius: var(--radius-sm);
  font-family: var(--font-mono);
  font-size: 0.85rem;
  cursor: pointer;
  white-space: nowrap;
  transition: var(--transition);
}

.category-tab:hover {
  color: var(--text-main);
  border-color: rgba(255, 255, 255, 0.2);
}

.category-tab.active {
  background: rgba(0, 240, 255, 0.1);
  border-color: rgba(0, 240, 255, 0.4);
  color: var(--accent-cyan);
}

.post-feed {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.empty-state {
  border: 1px dashed rgba(255, 255, 255, 0.15);
  border-radius: var(--radius-md);
  padding: 4rem 2rem;
  text-align: center;
  color: var(--text-muted);
  font-family: var(--font-mono);
  font-size: 0.9rem;
}

.post-card {
  background: var(--bg-card);
  border: 1px solid rgba(255, 255, 255, 0.06);
  border-radius: var(--radius-md);
  padding: 1.5rem;
}

.post-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 0.75rem;
  font-size: 0.85rem;
  color: var(--text-dim);
  font-family: var(--font-mono);
}

.post-author {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--text-muted);
}

.post-category-tag {
  background: rgba(255, 85, 0, 0.15);
  color: var(--accent-orange);
  padding: 0.15rem 0.5rem;
  border-radius: 4px;
  font-size: 0.75rem;
}

.post-title {
  font-size: 1.15rem;
  margin-bottom: 0.5rem;
  color: var(--text-main);
}

.post-body {
  color: var(--text-muted);
  font-size: 0.95rem;
  margin-bottom: 1.25rem;
  white-space: pre-line;
}

.post-actions {
  display: flex;
  align-items: center;
  gap: 1rem;
  border-top: 1px solid rgba(255, 255, 255, 0.05);
  padding-top: 0.75rem;
}

.action-btn {
  background: transparent;
  border: none;
  color: var(--text-dim);
  font-family: var(--font-mono);
  font-size: 0.8rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 0.4rem;
  transition: var(--transition);
}

.action-btn:hover {
  color: var(--accent-cyan);
}

.replies-container {
  margin-top: 1rem;
  padding-left: 1.5rem;
  border-left: 2px solid rgba(255, 255, 255, 0.08);
  display: flex;
  flex-direction: column;
  gap: 0.8rem;
}

.reply-item {
  background: rgba(0, 0, 0, 0.2);
  padding: 0.75rem 1rem;
  border-radius: var(--radius-sm);
  border: 1px solid rgba(255, 255, 255, 0.04);
}

.reply-meta {
  font-size: 0.75rem;
  color: var(--text-dim);
  font-family: var(--font-mono);
  margin-bottom: 0.3rem;
  display: flex;
  justify-content: space-between;
}

.reply-text {
  font-size: 0.88rem;
  color: var(--text-muted);
}

.reply-form {
  margin-top: 0.8rem;
  display: flex;
  gap: 0.5rem;
}

.reply-input {
  flex: 1;
  background: rgba(0, 0, 0, 0.3);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-sm);
  padding: 0.5rem 0.8rem;
  color: #fff;
  font-size: 0.85rem;
}

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

/* Downloads Grid & Featured Optix Card */
.downloads-single-container {
  max-width: 800px;
  margin: 2rem auto 0 auto;
}

.optix-card {
  background: var(--bg-card);
  border: 1px solid rgba(255, 85, 0, 0.25);
  border-radius: var(--radius-md);
  padding: 2.2rem;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.4);
  position: relative;
}

.optix-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 1.25rem;
}

.optix-icon {
  font-size: 2.5rem;
  background: rgba(255, 85, 0, 0.1);
  border: 1px solid rgba(255, 85, 0, 0.2);
  width: 60px;
  height: 60px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
}

.beta-badge {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  background: rgba(255, 85, 0, 0.15);
  color: var(--accent-orange);
  padding: 0.25rem 0.6rem;
  border-radius: 4px;
  border: 1px solid rgba(255, 85, 0, 0.3);
  letter-spacing: 0.05em;
}

.optix-desc {
  color: var(--text-muted);
  font-size: 1.02rem;
  line-height: 1.7;
  margin-bottom: 1.5rem;
}

.beta-notice {
  background: rgba(255, 85, 0, 0.06);
  border-left: 3px solid var(--accent-orange);
  padding: 0.9rem 1.2rem;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  font-size: 0.9rem;
  color: #e1e7ee;
  margin-bottom: 1.5rem;
}

.optix-meta {
  display: flex;
  gap: 1.5rem;
  flex-wrap: wrap;
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: var(--text-dim);
  background: rgba(0, 0, 0, 0.3);
  padding: 0.8rem 1.2rem;
  border-radius: var(--radius-sm);
  margin-bottom: 1.75rem;
}

.optix-download-buttons {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}

/* Modals */
.modal-backdrop {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background: rgba(0, 0, 0, 0.8);
  backdrop-filter: blur(8px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 200;
  opacity: 0;
  pointer-events: none;
  transition: var(--transition);
}

.modal-backdrop.active {
  opacity: 1;
  pointer-events: all;
}

.modal {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 2rem;
  width: 100%;
  max-width: 480px;
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.8);
}

.modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1.5rem;
}

.modal-title {
  font-family: var(--font-mono);
  font-size: 1.1rem;
  color: var(--text-main);
}

.close-btn {
  background: transparent;
  border: none;
  color: var(--text-dim);
  font-size: 1.5rem;
  cursor: pointer;
}

.close-btn:hover {
  color: #fff;
}

.form-group {
  margin-bottom: 1.25rem;
}

.form-label {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-bottom: 0.4rem;
}

.form-control {
  width: 100%;
  background: rgba(0, 0, 0, 0.4);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-sm);
  padding: 0.75rem;
  color: #fff;
  font-family: var(--font-sans);
  font-size: 0.95rem;
}

.form-control:focus {
  outline: none;
  border-color: var(--accent-orange);
}

select.form-control {
  background-color: var(--bg-secondary);
}

/* Footer */
footer {
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  padding: 2rem 1.5rem;
  text-align: center;
  color: var(--text-dim);
  font-family: var(--font-mono);
  font-size: 0.8rem;
  margin-top: 4rem;
}