/* Google Fonts Import */
@import url('https://fonts.googleapis.com/css2?family=IBM+Plex+Mono:ital,wght@0,300;0,400;0,500;0,600;0,700;1,400&family=IBM+Plex+Sans:wght@300;400;500;600;700&display=swap');

/* Color Preset Themes */
:root {
  /* Default: Matrix Green */
  --accent: #00e87a;
  --accent-rgb: 0, 232, 122;
  --bg: #070b10;
  --bg-card: #0c1119;
  --border: #1a2333;
  --border-hover: #26364d;
  --text: #e2e8f0;
  --text-muted: #6272a4;
  --text-inverse: #05080c;
  
  --font-sans: 'IBM Plex Sans', sans-serif;
  --font-mono: 'IBM Plex Mono', monospace;
  --header-height: 70px;
}

/* Theme Classes */
[data-theme="green"] {
  --accent: #00e87a;
  --accent-rgb: 0, 232, 122;
  --bg: #070b10;
  --bg-card: #0c1119;
  --border: #1a2333;
  --border-hover: #26364d;
  --text: #e2e8f0;
  --text-muted: #7f8c9d;
  --text-inverse: #05080c;
}

[data-theme="amber"] {
  --accent: #f5a623;
  --accent-rgb: 245, 166, 35;
  --bg: #0c0805;
  --bg-card: #15100c;
  --border: #2b1f16;
  --border-hover: #3d2c1e;
  --text: #f7ede2;
  --text-muted: #9c8a7c;
  --text-inverse: #0c0805;
}

[data-theme="cyan"] {
  --accent: #38bdf8;
  --accent-rgb: 56, 189, 248;
  --bg: #05090f;
  --bg-card: #0c1322;
  --border: #16263b;
  --border-hover: #213c5c;
  --text: #e0f2fe;
  --text-muted: #7dd3fc;
  --text-inverse: #05090f;
}

[data-theme="purple"] {
  --accent: #bd93f9;
  --accent-rgb: 189, 147, 249;
  --bg: #0a0612;
  --bg-card: #140d24;
  --border: #281a40;
  --border-hover: #3c2760;
  --text: #f1f0f5;
  --text-muted: #a48bbd;
  --text-inverse: #0a0612;
}

/* Reset & Global Styles */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  scrollbar-gutter: stable;
}

body {
  background-color: var(--bg);
  color: var(--text);
  font-family: var(--font-sans);
  line-height: 1.6;
  overflow-x: hidden;
  padding-bottom: 40px; /* Space for Vim Modeline */
  transition: background-color 0.4s ease, color 0.4s ease;
}

/* Scrollbar Customization */
::-webkit-scrollbar {
  width: 8px;
}
::-webkit-scrollbar-track {
  background: var(--bg);
}
::-webkit-scrollbar-thumb {
  background: var(--border);
  border-radius: 4px;
}
::-webkit-scrollbar-thumb:hover {
  background: var(--accent);
}

/* Typography Selection */
::selection {
  background-color: rgba(var(--accent-rgb), 0.3);
  color: var(--text);
}

a {
  color: var(--accent);
  text-decoration: none;
  transition: opacity 0.2s ease, text-shadow 0.2s ease;
}
a:hover {
  opacity: 0.9;
  text-shadow: 0 0 8px rgba(var(--accent-rgb), 0.5);
}

code, pre {
  font-family: var(--font-mono);
}

/* Page Layout */
.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 2rem;
}

/* Sections */
section {
  padding: 6rem 0;
  border-bottom: 1px solid var(--border);
}

.section-title {
  font-family: var(--font-mono);
  font-size: 1.8rem;
  color: var(--accent);
  margin-bottom: 3rem;
  display: flex;
  align-items: center;
  gap: 10px;
}

.section-title::before {
  content: '~/';
  opacity: 0.5;
}

.section-title::after {
  content: '';
  flex-grow: 1;
  height: 1px;
  background: linear-gradient(90deg, var(--border) 0%, transparent 100%);
  margin-left: 1rem;
}

/* Header Utilities */
header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--header-height);
  background-color: rgba(var(--bg), 0.85);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--border);
  z-index: 1000;
  transition: background-color 0.4s ease, border-color 0.4s ease;
}

.header-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 100%;
}

.logo {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 1.2rem;
  color: var(--text);
}

.logo span {
  color: var(--accent);
}

.nav-links {
  display: flex;
  gap: 2rem;
  list-style: none;
  font-family: var(--font-mono);
  font-size: 0.9rem;
}

.nav-links a {
  color: var(--text);
  position: relative;
  padding: 0.5rem 0;
}

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

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 1px;
  background-color: var(--accent);
  transition: width 0.3s ease;
}

.nav-links a:hover::after,
.nav-links a.active::after {
  width: 100%;
}

/* Availability Badge */
.availability-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  background-color: rgba(var(--accent-rgb), 0.1);
  border: 1px solid rgba(var(--accent-rgb), 0.3);
  padding: 6px 12px;
  border-radius: 4px;
}

.pulse-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background-color: var(--accent);
  box-shadow: 0 0 8px var(--accent);
  animation: pulse 1.8s infinite;
}

@keyframes pulse {
  0% {
    transform: scale(0.9);
    opacity: 1;
    box-shadow: 0 0 0 0 rgba(var(--accent-rgb), 0.7);
  }
  70% {
    transform: scale(1);
    opacity: 0.8;
    box-shadow: 0 0 0 8px rgba(var(--accent-rgb), 0);
  }
  100% {
    transform: scale(0.9);
    opacity: 0;
    box-shadow: 0 0 0 0 rgba(var(--accent-rgb), 0);
  }
}

/* Hero Section */
.hero {
  padding-top: 10rem;
  min-height: 85vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.hero-welcome {
  font-family: var(--font-mono);
  font-size: 1rem;
  color: var(--accent);
  margin-bottom: 1rem;
}

.hero-name {
  font-size: 4rem;
  font-weight: 700;
  line-height: 1.1;
  margin-bottom: 1.5rem;
}

.hero-title-wrapper {
  font-family: var(--font-mono);
  font-size: 1.8rem;
  margin-bottom: 2rem;
  display: flex;
  align-items: center;
  min-height: 2.8rem;
}

.typewriter-cursor {
  display: inline-block;
  background-color: var(--accent);
  width: 10px;
  height: 1.6rem;
  margin-left: 5px;
  animation: blink 0.8s infinite;
}

@keyframes blink {
  0%, 100% { opacity: 0; }
  50% { opacity: 1; }
}

.hero-bio {
  max-width: 600px;
  font-size: 1.1rem;
  color: var(--text-muted);
  margin-bottom: 3rem;
}

.hero-actions {
  display: flex;
  gap: 1.5rem;
}

/* Premium Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 24px;
  border-radius: 4px;
  font-family: var(--font-mono);
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.3s ease;
}

.btn-primary {
  background-color: var(--accent);
  color: var(--text-inverse);
  border: 1px solid var(--accent);
}

.btn-primary:hover {
  background-color: transparent;
  color: var(--accent);
  box-shadow: 0 0 15px rgba(var(--accent-rgb), 0.4);
}

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

.btn-secondary:hover {
  border-color: var(--accent);
  color: var(--accent);
  box-shadow: 0 0 10px rgba(var(--accent-rgb), 0.1);
}

/* Interactive Command Terminal Mockup */
.terminal-wrapper {
  margin-top: 4rem;
  margin-bottom: 3rem;
  box-shadow: 0 20px 40px rgba(0,0,0,0.4);
}

.terminal-card {
  background-color: #05080c;
  border: 1px solid var(--border);
  border-radius: 8px;
  overflow: hidden;
  font-family: var(--font-mono);
  font-size: 0.9rem;
  height: 400px;
  display: flex;
  flex-direction: column;
}

.terminal-header {
  background-color: #0b1118;
  border-bottom: 1px solid var(--border);
  padding: 10px 16px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.terminal-buttons {
  display: flex;
  gap: 6px;
}

.t-btn {
  width: 12px;
  height: 12px;
  border-radius: 50%;
}
.t-btn.red { background-color: #ff5f56; }
.t-btn.yellow { background-color: #ffbd2e; }
.t-btn.green { background-color: #27c93f; }

.terminal-title {
  color: var(--text-muted);
  font-size: 0.8rem;
}

.terminal-body {
  padding: 20px;
  flex-grow: 1;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 12px;
  scroll-behavior: smooth;
}

.terminal-line {
  line-height: 1.5;
  white-space: pre-wrap;
}

.terminal-line.output {
  color: #c5cdd8;
}

.terminal-line.accent {
  color: var(--accent);
}

.terminal-line.muted {
  color: var(--text-muted);
}

.terminal-input-line {
  display: flex;
  align-items: center;
  gap: 8px;
}

.terminal-prompt {
  color: var(--accent);
}

.terminal-input {
  background: transparent;
  border: none;
  outline: none;
  color: var(--text);
  font-family: var(--font-mono);
  font-size: 0.9rem;
  flex-grow: 1;
  caret-color: var(--accent);
}

/* Skills & Core Focus Grid */
.skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1.5rem;
}

/* Glow Card Glassmorphism Style */
.glow-card {
  position: relative;
  background-color: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 2rem;
  overflow: hidden;
  transition: border-color 0.3s ease, transform 0.3s ease;
}

.glow-card:hover {
  transform: translateY(-4px);
  border-color: rgba(var(--accent-rgb), 0.4);
}

/* radial-gradient cursor glow effect */
.glow-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: radial-gradient(
    400px circle at var(--mouse-x, 0px) var(--mouse-y, 0px),
    rgba(var(--accent-rgb), 0.05),
    transparent 80%
  );
  z-index: 1;
  pointer-events: none;
  opacity: 0;
  transition: opacity 0.5s ease;
}

.glow-card:hover::before {
  opacity: 1;
}

.glow-card-content {
  position: relative;
  z-index: 2;
}

.skill-icon-wrap {
  color: var(--accent);
  margin-bottom: 1.2rem;
}

.glow-card h3 {
  font-family: var(--font-mono);
  font-size: 1.2rem;
  margin-bottom: 0.8rem;
  color: var(--text);
}

.glow-card h3 a {
  color: var(--text);
  transition: color 0.2s ease, text-shadow 0.2s ease;
}

.glow-card h3 a:hover {
  color: var(--accent);
  text-shadow: 0 0 8px rgba(var(--accent-rgb), 0.5);
  opacity: 1;
}

.glow-card p {
  color: var(--text-muted);
  font-size: 0.95rem;
  margin-bottom: 1.2rem;
}

.skills-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.skill-tag {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  background-color: rgba(var(--accent-rgb), 0.05);
  border: 1px solid rgba(var(--accent-rgb), 0.15);
  color: var(--accent);
  padding: 3px 8px;
  border-radius: 4px;
}

/* Projects Grid */
.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 2rem;
}

.project-card {
  display: flex;
  flex-direction: column;
  height: 100%;
}

.project-meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1rem;
}

.project-link-icon {
  color: var(--text-muted);
  font-size: 1.1rem;
  transition: color 0.2s ease;
}

.project-card:hover .project-link-icon {
  color: var(--accent);
}

.project-tech {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: auto;
}

/* Technical Articles Section */
.articles-list {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 2rem;
}

.article-row {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  padding: 1.5rem;
  background-color: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 6px;
  gap: 2rem;
  transition: all 0.3s ease;
}

.article-row:hover {
  border-color: rgba(var(--accent-rgb), 0.4);
  transform: translateX(4px);
}

.article-left {
  flex-grow: 1;
}

.article-date {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--accent);
  margin-bottom: 0.5rem;
}

.article-title {
  font-size: 1.25rem;
  font-weight: 600;
  margin-bottom: 0.8rem;
  color: var(--text);
  display: block;
}

.article-desc {
  font-size: 0.95rem;
  color: var(--text-muted);
  margin-bottom: 1rem;
}

.article-right {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 1rem;
}

.article-link-btn {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  background-color: var(--border);
  border: 1px solid transparent;
  color: var(--text);
  padding: 6px 12px;
  border-radius: 4px;
  transition: all 0.2s ease;
}

.article-row:hover .article-link-btn {
  background-color: var(--accent);
  color: var(--text-inverse);
}

/* Contact Section */
.contact-container {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 4rem;
}

.contact-info {
  display: flex;
  flex-direction: column;
  gap: 2rem;
}

.contact-channels {
  display: flex;
  flex-direction: column;
  gap: 1.2rem;
}

.contact-item {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 1.2rem;
  background-color: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 6px;
  transition: border-color 0.2s ease;
}

.contact-item:hover {
  border-color: var(--accent);
}

.contact-item-icon {
  font-size: 1.5rem;
  color: var(--accent);
  width: 24px;
  height: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.contact-item-details h4 {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--text-muted);
  text-transform: uppercase;
}

.contact-item-details p {
  font-size: 1rem;
  color: var(--text);
}

/* Contact Form Styling */
.contact-form {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.form-group label {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--accent);
}

.form-control {
  background-color: #05080c;
  border: 1px solid var(--border);
  color: var(--text);
  font-family: var(--font-sans);
  padding: 12px 16px;
  border-radius: 4px;
  outline: none;
  font-size: 0.95rem;
  transition: all 0.3s ease;
}

.form-control:focus {
  border-color: var(--accent);
  box-shadow: 0 0 10px rgba(var(--accent-rgb), 0.1);
}

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

.form-status {
  font-family: var(--font-mono);
  font-size: 0.9rem;
  margin-top: 1rem;
  min-height: 1.5rem;
}

.form-status.success {
  color: #27c93f;
}

.form-status.error {
  color: #ff5f56;
}

/* Vim Status Bar (Footer) */
.vim-footer {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  height: 24px;
  background-color: #0b1118;
  border-top: 1px solid var(--border);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  z-index: 1001;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.vim-left, .vim-right {
  display: flex;
  align-items: center;
  height: 100%;
}

.vim-mode {
  font-weight: 700;
  padding: 0 12px;
  height: 100%;
  display: flex;
  align-items: center;
  transition: background-color 0.2s ease, color 0.2s ease;
}

/* Mode Colors mapping */
.vim-mode.normal {
  background-color: var(--accent);
  color: var(--text-inverse);
}

.vim-mode.insert {
  background-color: #bd93f9;
  color: #0a0612;
}

.vim-mode.visual {
  background-color: #ffb86c;
  color: #0c0805;
}

.vim-file {
  padding: 0 12px;
  color: var(--text);
  border-right: 1px solid var(--border);
}

.vim-branch {
  padding: 0 12px;
  color: var(--accent);
  display: flex;
  align-items: center;
  gap: 4px;
}

.vim-encoding {
  padding: 0 12px;
  color: var(--text-muted);
  border-left: 1px solid var(--border);
}

.vim-position {
  background-color: var(--border);
  color: var(--text);
  padding: 0 12px;
  height: 100%;
  display: flex;
  align-items: center;
}

/* Responsive Breakpoints */
@media (max-width: 900px) {
  .contact-container {
    grid-template-columns: 1fr;
    gap: 3rem;
  }
  
  .hero-name {
    font-size: 3rem;
  }
  
  .hero-title-wrapper {
    font-size: 1.4rem;
  }
}

@media (max-width: 768px) {
  section {
    padding: 4rem 0;
  }
  
  header {
    height: auto;
    padding: 10px 0;
  }
  
  .header-container {
    flex-direction: column;
    gap: 10px;
  }
  
  .nav-links {
    gap: 1.2rem;
  }
  
  .hero {
    padding-top: 8rem;
  }
  
  .article-row {
    flex-direction: column;
    gap: 1rem;
  }
  
  .article-right {
    align-items: flex-start;
    width: 100%;
  }
  
  .vim-encoding {
    display: none;
  }
}

/* Monospace Terminal Block-Art Banner */
.terminal-banner {
  font-family: var(--font-mono);
  font-size: clamp(0.38rem, 1.2vw, 0.85rem);
  line-height: 1.25;
  white-space: pre;
  color: var(--accent);
  margin: 1.2rem 0;
  letter-spacing: -0.02em;
  overflow-x: auto;
  transition: color 0.4s ease;
}

/* Articles Browser Styling */
.articles-browser-header {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1.5rem;
  max-width: 700px;
  margin: 0 auto 3.5rem auto;
  text-align: center;
  background-color: rgba(12, 17, 25, 0.7);
  border: 1px solid var(--border);
  padding: 2.2rem;
  border-radius: 8px;
  backdrop-filter: blur(12px);
  box-shadow: 0 15px 35px rgba(0, 0, 0, 0.3);
}

.search-wrapper {
  position: relative;
  width: 100%;
}

.search-icon {
  position: absolute;
  left: 18px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-muted);
  pointer-events: none;
  width: 18px;
  height: 18px;
  transition: color 0.3s ease;
}

.search-input {
  width: 100%;
  padding: 14px 16px 14px 50px;
  background-color: #05080c !important;
  border: 1px solid var(--border) !important;
  border-radius: 4px !important;
  color: var(--text) !important;
  font-family: var(--font-mono) !important;
  font-size: 0.95rem;
  outline: none;
  transition: all 0.3s ease;
}

.search-input:focus {
  border-color: var(--accent) !important;
  box-shadow: 0 0 15px rgba(var(--accent-rgb), 0.2) !important;
}

.search-input:focus + .search-icon {
  color: var(--accent);
}

/* Tag Filters */
.tags-filter-container {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1rem;
  width: 100%;
}

.filter-label {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.tags-filter-pills {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 8px;
}

.filter-tag {
  font-family: var(--font-mono) !important;
  font-size: 0.75rem !important;
  background-color: rgba(var(--accent-rgb), 0.02) !important;
  border: 1px solid var(--border) !important;
  color: var(--text-muted) !important;
  padding: 6px 14px !important;
  border-radius: 4px !important;
  cursor: pointer;
  user-select: none;
  transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1) !important;
}

.filter-tag:hover {
  border-color: var(--accent) !important;
  color: var(--accent) !important;
  background-color: rgba(var(--accent-rgb), 0.05) !important;
  transform: translateY(-1px);
}

.filter-tag.active {
  background-color: rgba(var(--accent-rgb), 0.15) !important;
  border-color: var(--accent) !important;
  color: var(--accent) !important;
  box-shadow: 0 0 12px rgba(var(--accent-rgb), 0.25) !important;
}

/* Pagination container */
.pagination-container {
  display: flex;
  justify-content: center;
  margin-top: 3.5rem;
}

.btn-load-more {
  background-color: transparent !important;
  color: var(--text) !important;
  border: 1px solid var(--border) !important;
  padding: 14px 32px !important;
  border-radius: 4px !important;
  font-family: var(--font-mono) !important;
  font-size: 0.85rem !important;
  cursor: pointer;
  transition: all 0.3s ease !important;
}

.btn-load-more:hover {
  border-color: var(--accent) !important;
  color: var(--accent) !important;
  box-shadow: 0 0 15px rgba(var(--accent-rgb), 0.2) !important;
}

.btn-load-more.hidden {
  display: none !important;
}

/* Empty State */
.articles-empty-state {
  text-align: center;
  padding: 4rem 2rem;
  background-color: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 6px;
  color: var(--text-muted);
  font-family: var(--font-mono);
  font-size: 0.95rem;
  width: 100%;
}

.articles-empty-state i {
  margin-bottom: 1rem;
  color: var(--accent);
  display: block;
}