/**
 * Minimalist Systems Engineer & Terminal Architecture
 * Designed for Raman Tondro (RMNO21)
 * Adheres to Anti-AI Design Rules: Zero-Emoji, Monochromatic Obsidian Palette, Monospace Accents
 */

:root {
  --bg-base: #090a0d;
  --bg-surface: #101216;
  --bg-surface-elevated: #161920;
  --bg-terminal: #07080a;
  --border-subtle: rgba(255, 255, 255, 0.08);
  --border-hover: rgba(255, 255, 255, 0.18);
  --border-active: #38bdf8;
  
  --text-primary: #f4f4f5;
  --text-secondary: #a1a1aa;
  --text-muted: #71717a;
  --text-mono: #38bdf8;
  
  --accent-emerald: #10b981;
  --accent-cyan: #38bdf8;
  --accent-amber: #f59e0b;
  
  --font-sans: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', Menlo, monospace;
  --font-fa: 'Vazirmatn', Tahoma, sans-serif;

  --container-max: 1040px;
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 14px;
}

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

html {
  scroll-behavior: smooth;
  color-scheme: dark;
}

body {
  background-color: var(--bg-base);
  color: var(--text-primary);
  font-family: var(--font-sans);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  position: relative;
  min-height: 100vh;
}

/* Subtle Technical Background Grid */
body::before {
  content: "";
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-image: 
    linear-gradient(to right, rgba(255, 255, 255, 0.02) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(255, 255, 255, 0.02) 1px, transparent 1px);
  background-size: 32px 32px;
  pointer-events: none;
  z-index: 0;
}

.layout-wrapper {
  position: relative;
  z-index: 1;
}

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

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

.icon-svg {
  width: 1rem;
  height: 1rem;
  flex-shrink: 0;
}

/* Header & Top Bar */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(9, 10, 13, 0.85);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-subtle);
}

.header-container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0.85rem 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.header-identity {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.avatar-micro {
  width: 34px;
  height: 34px;
  border-radius: 50%;
  border: 1px solid var(--border-hover);
  display: block;
}

.identity-text {
  display: flex;
  flex-direction: column;
}

.name-primary {
  font-weight: 700;
  font-size: 0.95rem;
  letter-spacing: -0.01em;
}

.name-persian {
  font-family: var(--font-fa);
  font-size: 0.75rem;
  color: var(--text-muted);
}

.header-nav {
  display: flex;
  align-items: center;
  gap: 1.5rem;
}

.header-nav a {
  font-size: 0.85rem;
  color: var(--text-secondary);
  font-weight: 500;
  transition: color 0.15s ease;
}

.header-nav a:hover {
  color: var(--text-primary);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.btn-pill {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.35rem 0.75rem;
  border-radius: var(--radius-sm);
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  font-size: 0.8rem;
  font-family: var(--font-mono);
  color: var(--text-secondary);
  cursor: pointer;
  transition: all 0.15s ease;
}

.btn-pill:hover {
  border-color: var(--border-hover);
  color: var(--text-primary);
  background: var(--bg-surface-elevated);
}

/* Hero Section */
.hero-section {
  padding: 4.5rem 0 2.5rem;
  border-bottom: 1px solid var(--border-subtle);
}

.status-pill {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.3rem 0.7rem;
  border-radius: var(--radius-sm);
  background: rgba(16, 185, 129, 0.08);
  border: 1px solid rgba(16, 185, 129, 0.2);
  font-size: 0.78rem;
  font-family: var(--font-mono);
  color: var(--accent-emerald);
  margin-bottom: 1.75rem;
}

.status-indicator {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent-emerald);
  box-shadow: 0 0 6px var(--accent-emerald);
}

.hero-main-title {
  font-size: 2.75rem;
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1.15;
  margin-bottom: 0.75rem;
}

.hero-main-title .farsi-tag {
  font-family: var(--font-fa);
  font-weight: 700;
  color: var(--accent-cyan);
  font-size: 2.1rem;
  margin-left: 0.6rem;
}

.hero-tagline {
  font-size: 1.15rem;
  color: var(--text-secondary);
  max-width: 680px;
  margin-bottom: 1.75rem;
  line-height: 1.6;
}

.hero-actions-row {
  display: flex;
  align-items: center;
  gap: 0.85rem;
  flex-wrap: wrap;
}

.btn-tech {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.6rem 1.1rem;
  border-radius: var(--radius-sm);
  font-size: 0.85rem;
  font-weight: 600;
  font-family: var(--font-mono);
  cursor: pointer;
  transition: all 0.15s ease;
}

.btn-tech-primary {
  background: var(--text-primary);
  color: #000;
  border: 1px solid transparent;
}

.btn-tech-primary:hover {
  background: #fff;
  box-shadow: 0 0 16px rgba(255, 255, 255, 0.15);
}

.btn-tech-secondary {
  background: var(--bg-surface);
  color: var(--text-primary);
  border: 1px solid var(--border-subtle);
}

.btn-tech-secondary:hover {
  border-color: var(--border-hover);
  background: var(--bg-surface-elevated);
}

/* Interactive Embedded Terminal (Option B Integration) */
.terminal-block {
  margin: 3.5rem 0;
  background: var(--bg-terminal);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: 0 8px 30px rgba(0, 0, 0, 0.6);
  font-family: var(--font-mono);
}

.terminal-header {
  padding: 0.65rem 1rem;
  background: #111318;
  border-bottom: 1px solid var(--border-subtle);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.terminal-dots {
  display: flex;
  align-items: center;
  gap: 0.45rem;
}

.dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
}
.dot-red { background: #ef4444; }
.dot-yellow { background: #eab308; }
.dot-green { background: #22c55e; }

.terminal-title {
  font-size: 0.76rem;
  color: var(--text-muted);
  letter-spacing: 0.03em;
}

.terminal-hint {
  font-size: 0.72rem;
  color: var(--text-muted);
}

.terminal-body {
  padding: 1.25rem 1.25rem 1.5rem;
  min-height: 220px;
  max-height: 380px;
  overflow-y: auto;
  font-size: 0.84rem;
  line-height: 1.6;
}

.terminal-output {
  color: #a1a1aa;
  margin-bottom: 0.75rem;
  white-space: pre-wrap;
  word-break: break-word;
}

.terminal-output .out-banner {
  color: #38bdf8;
}

.terminal-output .out-cmd {
  color: #22c55e;
}

.terminal-output .out-highlight {
  color: #f4f4f5;
  font-weight: 600;
}

.terminal-input-row {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.terminal-prompt {
  color: #22c55e;
  font-weight: 600;
}

.terminal-input {
  flex: 1;
  background: transparent;
  border: none;
  outline: none;
  font-family: var(--font-mono);
  font-size: 0.84rem;
  color: #f4f4f5;
  caret-color: var(--accent-cyan);
}

/* Section Containers */
.content-section {
  padding: 3.5rem 0;
  border-bottom: 1px solid var(--border-subtle);
}

.section-head-bar {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  margin-bottom: 2rem;
  flex-wrap: wrap;
  gap: 1rem;
}

.section-label {
  font-size: 0.78rem;
  font-family: var(--font-mono);
  text-transform: uppercase;
  color: var(--text-mono);
  letter-spacing: 0.05em;
  margin-bottom: 0.35rem;
}

.section-headline {
  font-size: 1.6rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}

/* Projects Catalog & Filter */
.project-filters {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  flex-wrap: wrap;
}

.filter-btn {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  color: var(--text-muted);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  padding: 0.35rem 0.65rem;
  cursor: pointer;
  transition: all 0.15s ease;
}

.filter-btn:hover {
  color: var(--text-primary);
  border-color: var(--border-hover);
}

.filter-btn.active {
  background: var(--bg-surface-elevated);
  color: var(--accent-cyan);
  border-color: rgba(56, 189, 248, 0.4);
}

.projects-catalog-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(310px, 1fr));
  gap: 1.25rem;
}

.project-card-tech {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  transition: border-color 0.15s ease, transform 0.15s ease;
}

.project-card-tech:hover {
  border-color: var(--border-hover);
  transform: translateY(-2px);
}

.project-top-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 0.75rem;
}

.project-tag-pill {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--accent-cyan);
  background: rgba(56, 189, 248, 0.08);
  padding: 0.2rem 0.5rem;
  border-radius: var(--radius-sm);
}

.project-repo-link {
  color: var(--text-muted);
  transition: color 0.15s ease;
}

.project-repo-link:hover {
  color: var(--text-primary);
}

.project-name-tech {
  font-size: 1.15rem;
  font-weight: 700;
  letter-spacing: -0.01em;
  margin-bottom: 0.5rem;
}

.project-summary-tech {
  font-size: 0.88rem;
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: 1.25rem;
  flex-grow: 1;
}

.project-stack-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
}

.stack-badge {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--text-muted);
  background: rgba(255, 255, 255, 0.04);
  padding: 0.15rem 0.45rem;
  border-radius: var(--radius-sm);
  border: 1px solid rgba(255, 255, 255, 0.04);
}

/* Skills Technical Matrix */
.skills-matrix-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(230px, 1fr));
  gap: 1.25rem;
}

.skill-matrix-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 1.25rem;
}

.skill-matrix-category {
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 0.85rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.skill-list-items {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.45rem;
}

.skill-list-items li {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.skill-list-items li::before {
  content: "•";
  color: var(--text-mono);
}

/* About / Technical Background Section */
.bio-editorial-layout {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: 2.5rem;
}

.bio-editorial-text p {
  font-size: 0.98rem;
  color: var(--text-secondary);
  line-height: 1.8;
  margin-bottom: 1.25rem;
}

.bio-editorial-text strong {
  color: var(--text-primary);
}

.bio-editorial-fa {
  font-family: var(--font-fa);
  margin-top: 1.75rem;
  padding-top: 1.75rem;
  border-top: 1px solid var(--border-subtle);
}

.bio-editorial-fa p {
  font-size: 0.98rem;
  line-height: 1.9;
  color: var(--text-secondary);
}

.sidebar-tech-info {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.sidebar-info-row {
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
}

.sidebar-info-label {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  text-transform: uppercase;
  color: var(--text-muted);
}

.sidebar-info-val {
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--text-primary);
}

/* Direct Contact Section */
.contact-actions-bar {
  display: flex;
  align-items: center;
  gap: 1.25rem;
  flex-wrap: wrap;
}

.contact-link-pill {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.75rem 1.25rem;
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--text-primary);
  transition: all 0.15s ease;
}

.contact-link-pill:hover {
  border-color: var(--accent-cyan);
  background: var(--bg-surface-elevated);
}

/* Footer */
.site-footer {
  padding: 2.5rem 0;
  border-top: 1px solid var(--border-subtle);
  font-size: 0.8rem;
  color: var(--text-muted);
}

.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
}

/* RTL Mode */
body.lang-fa {
  font-family: var(--font-fa), var(--font-sans);
  direction: rtl;
  text-align: right;
}

body.lang-fa .site-header .header-container {
  flex-direction: row;
}

body.lang-fa .header-nav {
  display: flex;
  gap: 1.5rem;
}

body.lang-fa .sidebar-tech-info {
  text-align: right;
}

body.lang-fa .sidebar-info-row {
  align-items: flex-start;
}

body.lang-fa .sidebar-info-val,
body.lang-fa .sidebar-info-label {
  text-align: right;
}

body.lang-fa .bio-editorial-text p {
  text-align: right;
  line-height: 2;
  unicode-bidi: plaintext;
}

body.lang-fa .section-head-bar {
  text-align: right;
}

body.lang-fa .terminal-block {
  direction: ltr;
  text-align: left;
}

/* Accessibility & SEO Crawler Helper */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border-width: 0;
}

.sidebar-info-sub {
  color: var(--text-muted);
  font-size: 0.9em;
  font-family: var(--font-fa);
  margin-left: 6px;
}

body.lang-fa .sidebar-info-sub {
  margin-left: 0;
  margin-right: 6px;
  font-family: var(--font-sans);
}

/* Responsive adjustments */
@media (max-width: 768px) {
  .hero-main-title {
    font-size: 2.1rem;
  }
  .hero-main-title .farsi-tag {
    font-size: 1.6rem;
  }
  .bio-editorial-layout {
    grid-template-columns: 1fr;
  }
  .header-nav {
    display: none;
  }
}