/* ==========================================================================
   elfRadio.net - Ghost in the Shell / Cyberpunk Minimal Stylesheet
   - Dark Mode: Tokyo Node Exhibition (Black & Neon Yellow #FFE600, HUD brackets, Barcodes)
   - Light Mode: SAC_2045 (Clean High-Contrast White & Black, Minimal Cyber Lines)
   ========================================================================== */

:root {
  /* Dark Theme (Default - Tokyo Node Ghost in the Shell Exhibition) */
  --bg-primary: #0a0b0e;
  --bg-secondary: #12141a;
  --bg-card: #161822;
  --bg-glass: rgba(10, 11, 14, 0.94);
  --text-primary: #f0f2f5;
  --text-secondary: #9aa0a6;
  --text-muted: #606770;
  
  --accent-yellow: #ffe600;
  --accent-yellow-glow: rgba(255, 230, 0, 0.35);
  --accent-yellow-dim: rgba(255, 230, 0, 0.12);
  --accent-cyan: #00f0ff;
  --accent-cyan-glow: rgba(0, 240, 255, 0.3);
  
  --border-color: #272a38;
  --border-accent: #ffe600;
  --border-subtle: #1c1f2b;
  
  --badge-bg: #222533;
  --badge-text: #ffe600;
  
  --font-mono: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, Courier, monospace;
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans", sans-serif;
  --font-title: "Hiragino Mincho ProN", "Yu Mincho", "Source Han Serif SC", "Noto Serif CJK SC", "Songti SC", Georgia, serif;
  
  --transition-speed: 0.2s;
  --container-width: 1200px;
}

[data-theme="light"] {
  /* Light Theme (SAC_2045 Minimal White & Black) */
  --bg-primary: #f5f6f8;
  --bg-secondary: #ffffff;
  --bg-card: #ffffff;
  --bg-glass: rgba(255, 255, 255, 0.96);
  --text-primary: #121418;
  --text-secondary: #4a505a;
  --text-muted: #7d8590;
  
  --accent-yellow: #0066cc;
  --accent-yellow-glow: rgba(0, 102, 204, 0.25);
  --accent-yellow-dim: rgba(0, 102, 204, 0.1);
  --accent-cyan: #0969da;
  --accent-cyan-glow: rgba(9, 105, 218, 0.2);
  
  --border-color: #d8dee4;
  --border-accent: #121418;
  --border-subtle: #eaeef2;
  
  --badge-bg: #ebf2fa;
  --badge-text: #0969da;
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
}

body {
  background-color: var(--bg-primary);
  color: var(--text-primary);
  font-family: var(--font-sans);
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  background-image: 
    radial-gradient(var(--border-subtle) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(0,0,0,0.05), transparent);
  background-size: 24px 24px, 100% 100%;
}

a {
  color: var(--text-primary);
  text-decoration: none;
  transition: color var(--transition-speed);
}

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

ul, ol {
  list-style: none;
  margin: 0;
  padding: 0;
}

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

/* Container */
.container {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 1.5rem;
  width: 100%;
}

.mono {
  font-family: var(--font-mono);
}

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

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

.barcode-strip {
  display: inline-block;
  height: 16px;
  width: 44px;
  background: repeating-linear-gradient(
    90deg,
    var(--accent-yellow),
    var(--accent-yellow) 2px,
    transparent 2px,
    transparent 4px,
    var(--accent-yellow) 4px,
    var(--accent-yellow) 6px,
    transparent 6px,
    transparent 8px
  );
  vertical-align: middle;
  opacity: 0.85;
}

/* HUD Box and Brackets */
.hud-box {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  position: relative;
  transition: transform var(--transition-speed), border-color var(--transition-speed), box-shadow var(--transition-speed);
}

.hud-box:hover {
  border-color: var(--accent-yellow);
  box-shadow: 0 4px 20px var(--accent-yellow-dim);
}

.hud-corner {
  position: absolute;
  width: 8px;
  height: 8px;
  border: 2px solid var(--accent-yellow);
  pointer-events: none;
}

.hud-corner.tl { top: -1px; left: -1px; border-right: none; border-bottom: none; }
.hud-corner.tr { top: -1px; right: -1px; border-left: none; border-bottom: none; }
.hud-corner.bl { bottom: -1px; left: -1px; border-right: none; border-top: none; }
.hud-corner.br { bottom: -1px; right: -1px; border-left: none; border-top: none; }

.hud-tag {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.2rem 0.5rem;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  background-color: var(--accent-yellow);
  color: #000000;
  letter-spacing: 0.05em;
}

/* Top Telemetry Header */
.telemetry-bar {
  background-color: var(--bg-primary);
  border-bottom: 1px solid var(--border-subtle);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-secondary);
  padding: 0.35rem 0;
  letter-spacing: 0.05em;
}

.telemetry-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.telemetry-item {
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

.status-dot {
  width: 7px;
  height: 7px;
  background-color: #00ff66;
  border-radius: 50%;
  display: inline-block;
  box-shadow: 0 0 6px #00ff66;
  animation: blink 2s infinite ease-in-out;
}

@keyframes blink {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.3; }
}

/* Main Navigation Bar */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background-color: var(--bg-glass);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-color);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 4.5rem;
}

/* Brand Logo (Mascot + Ghost in the Shell Stacked Typography) */
.brand-logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  text-decoration: none;
}

.brand-logo-frame {
  height: 42px;
  width: 46px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.site-logo-img {
  height: 38px;
  width: auto;
  max-width: 46px;
  object-fit: contain;
  transition: transform var(--transition-speed);
}

.brand-logo:hover .site-logo-img {
  transform: scale(1.08);
}

.brand-text {
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: flex-start;
  text-align: left;
  line-height: 1;
  gap: 0px;
}

.brand-kanji {
  font-family: var(--font-title);
  font-size: 1.45rem;
  font-weight: 900;
  letter-spacing: 0.16em;
  color: var(--text-primary);
  line-height: 1.05;
}

.brand-en {
  font-family: var(--font-sans);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  text-transform: none; /* 严格保留 elfRadio 大小写 */
  color: var(--text-secondary); /* 去除黄色，使用优雅副标题色 */
  line-height: 1;
  margin-top: -2px; /* 进一步压缩与上方汉字行距 */
  margin-left: 2px;
}

/* Navigation Links (Enlarged and Clear) */
.nav-menu {
  display: flex;
  align-items: center;
  list-style: none;
  gap: 1.2rem;
  margin: 0;
  padding: 0;
}

.nav-link {
  font-family: var(--font-title);
  font-size: 1.08rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  padding: 0.35rem 0.65rem;
  position: relative;
  color: var(--text-primary); /* 与段落大标题及Logo文字一致的高亮白/银色 */
  white-space: nowrap;
  transition: color var(--transition-speed);
}

/* 4个黄色直角 HUD 准星边框悬浮焦点动态效果 */
.nav-link::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: 
    linear-gradient(to right, var(--accent-yellow) 2px, transparent 2px) 0 0,
    linear-gradient(to bottom, var(--accent-yellow) 2px, transparent 2px) 0 0,
    linear-gradient(to left, var(--accent-yellow) 2px, transparent 2px) 100% 0,
    linear-gradient(to bottom, var(--accent-yellow) 2px, transparent 2px) 100% 0,
    linear-gradient(to right, var(--accent-yellow) 2px, transparent 2px) 0 100%,
    linear-gradient(to top, var(--accent-yellow) 2px, transparent 2px) 0 100%,
    linear-gradient(to left, var(--accent-yellow) 2px, transparent 2px) 100% 100%,
    linear-gradient(to top, var(--accent-yellow) 2px, transparent 2px) 100% 100%;
  background-repeat: no-repeat;
  background-size: 6px 6px;
  opacity: 0;
  transform: scale(0.92);
  transition: opacity 0.18s ease, transform 0.18s ease;
}

.nav-link:hover::after,
.nav-link.active::after {
  opacity: 1;
  transform: scale(1);
}

.nav-link:hover,
.nav-link.active {
  color: var(--accent-yellow);
}

/* Control Buttons (Icon Only) */
.header-controls {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.control-btn {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  color: var(--text-primary);
  width: 36px;
  height: 36px;
  border-radius: 4px;
  font-size: 1.1rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0;
  transition: all var(--transition-speed);
}

.control-btn:hover {
  border-color: var(--accent-yellow);
  color: var(--accent-yellow);
  transform: translateY(-1px);
  box-shadow: 0 2px 10px var(--accent-yellow-dim);
}

.menu-toggle-btn {
  display: none;
  background: none;
  border: none;
  color: var(--text-primary);
  font-size: 1.5rem;
  cursor: pointer;
}

/* Hero Section */
.hero-section {
  padding: 3.5rem 0 2.5rem;
  position: relative;
  overflow: hidden;
  border-bottom: 1px solid var(--border-color);
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 2.5rem;
  align-items: center;
}

.hero-badge-row {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 1rem;
}

.hero-title {
  font-family: var(--font-title);
  font-size: 2.5rem;
  font-weight: 900;
  line-height: 1.2;
  letter-spacing: 0.05em;
  margin-bottom: 1rem;
}

.hero-tagline {
  font-size: 1rem;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 1.5rem;
  border-left: 3px solid var(--accent-yellow);
  padding-left: 1rem;
}

.hero-tags-matrix {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 1.75rem;
}

.tech-tag {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  padding: 0.25rem 0.6rem;
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
}

.tech-tag.highlight {
  border-color: var(--accent-yellow);
  color: var(--accent-yellow);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
}

.btn-cyber {
  background-color: var(--accent-yellow);
  color: #000000;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 0.85rem;
  padding: 0.75rem 1.4rem;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  letter-spacing: 0.05em;
  border: none;
  cursor: pointer;
  position: relative;
  transition: transform var(--transition-speed), box-shadow var(--transition-speed);
}

.btn-cyber:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 15px var(--accent-yellow-glow);
  color: #000000;
}

.btn-cyber-outline {
  background-color: transparent;
  color: var(--text-primary);
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 0.85rem;
  padding: 0.75rem 1.4rem;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  letter-spacing: 0.05em;
  border: 1px solid var(--border-color);
  cursor: pointer;
  transition: all var(--transition-speed);
}

.btn-cyber-outline:hover {
  border-color: var(--accent-yellow);
  color: var(--accent-yellow);
  background-color: var(--accent-yellow-dim);
}

/* Radio Telemetry Card in Hero */
.telemetry-card {
  padding: 1.5rem;
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  font-family: var(--font-mono);
}

.telemetry-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-bottom: 1px solid var(--border-subtle);
  padding-bottom: 0.75rem;
  margin-bottom: 1rem;
}

.telemetry-screen {
  background-color: #050608;
  border: 1px solid #1f2230;
  padding: 1rem;
  margin-bottom: 1rem;
  color: #00ff66;
}

.screen-freq {
  font-size: 2.1rem;
  font-weight: 900;
  letter-spacing: 0.05em;
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  line-height: 1;
}

.screen-freq .unit {
  font-size: 1rem;
  color: #00bb44;
}

.screen-meters {
  margin-top: 0.75rem;
  display: flex;
  justify-content: space-between;
  font-size: 0.75rem;
}

.meter-bar {
  display: flex;
  gap: 2px;
}

.meter-seg {
  width: 5px;
  height: 10px;
  background-color: #113311;
}

.meter-seg.active {
  background-color: #00ff66;
  box-shadow: 0 0 3px #00ff66;
}

.telemetry-details {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.75rem;
  font-size: 0.8rem;
}

.telemetry-row {
  display: flex;
  justify-content: space-between;
  border-bottom: 1px dashed var(--border-subtle);
  padding-bottom: 0.25rem;
}

/* Section Common Styles */
.section {
  padding: 4rem 0;
  border-bottom: 1px solid var(--border-color);
}

.section-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  margin-bottom: 2.5rem;
  flex-wrap: wrap;
  gap: 1rem;
}

.section-title-wrap {
  display: flex;
  flex-direction: column;
}

.section-tag {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--accent-yellow);
  letter-spacing: 0.15em;
  text-transform: uppercase;
  margin-bottom: 0.35rem;
}

.section-title {
  font-family: var(--font-title);
  font-size: 2.1rem;
  font-weight: 900;
  letter-spacing: 0.08em;
  line-height: 1.2;
}

.section-desc {
  color: var(--text-secondary);
  font-size: 0.95rem;
  margin-top: 0.35rem;
}

/* Grid & Card Layouts */
.cards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
  gap: 2rem;
}

.product-card {
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  height: 100%;
}

.product-image-wrap {
  width: 100%;
  height: 180px;
  background-color: #050608;
  border: 1px solid var(--border-subtle);
  margin-bottom: 1.25rem;
  position: relative;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
}

.product-image-wrap img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.3s ease;
}

.product-card:hover .product-image-wrap img {
  transform: scale(1.05);
}

.product-badge {
  position: absolute;
  top: 0.5rem;
  right: 0.5rem;
  background-color: rgba(10, 11, 14, 0.85);
  border: 1px solid var(--border-color);
  font-family: var(--font-mono);
  font-size: 0.7rem;
  padding: 0.2rem 0.5rem;
  color: var(--accent-yellow);
}

.product-title {
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
  line-height: 1.35;
}

.product-meta {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--text-secondary);
  margin-bottom: 0.75rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

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

.product-specs-list {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  border-top: 1px solid var(--border-subtle);
  padding-top: 0.75rem;
  margin-bottom: 1.25rem;
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

.spec-row {
  display: flex;
  justify-content: space-between;
}

.spec-label {
  color: var(--text-muted);
}

.spec-value {
  color: var(--text-primary);
  text-align: right;
}

.product-actions {
  display: flex;
  gap: 0.75rem;
  margin-top: auto;
}

/* Vertical Full Detail Cards (For dedicated pages) */
.vertical-list {
  display: flex;
  flex-direction: column;
  gap: 2rem;
}

.vertical-card {
  display: grid;
  grid-template-columns: 280px 1fr;
  gap: 2rem;
  padding: 2rem;
}

.vertical-card-media {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.vertical-card-media .img-frame {
  width: 100%;
  height: 220px;
  background-color: #050608;
  border: 1px solid var(--border-subtle);
  overflow: hidden;
}

.vertical-card-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.vertical-card-body {
  display: flex;
  flex-direction: column;
}

/* Project Cards */
.project-card {
  padding: 1.75rem;
  display: flex;
  flex-direction: column;
  height: 100%;
}

.project-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 0.75rem;
  gap: 0.5rem;
}

.project-title {
  font-size: 1.2rem;
  font-weight: 700;
  line-height: 1.3;
}

.project-lang-badge {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  padding: 0.2rem 0.5rem;
  background-color: var(--badge-bg);
  color: var(--badge-text);
  border: 1px solid var(--border-color);
  white-space: nowrap;
}

.project-features {
  list-style: none;
  margin: 1rem 0;
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
  font-size: 0.85rem;
  color: var(--text-secondary);
}

.project-features li::before {
  content: "▸ ";
  color: var(--accent-yellow);
  font-weight: bold;
}

/* Knowledge / NotebookLM Cards */
.knowledge-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
  gap: 1.5rem;
}

.kb-card {
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  border-left: 3px solid var(--accent-yellow);
}

.kb-header {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 0.75rem;
}

.kb-icon {
  width: 28px;
  height: 28px;
  background-color: var(--accent-yellow-dim);
  color: var(--accent-yellow);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.85rem;
  font-family: var(--font-mono);
  font-weight: 700;
}

.kb-title {
  font-size: 1.05rem;
  font-weight: 700;
  line-height: 1.4;
  margin-bottom: 0.5rem;
}

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

.kb-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
  margin-bottom: 1rem;
}

.kb-tag {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  background-color: var(--badge-bg);
  color: var(--text-secondary);
  padding: 0.15rem 0.45rem;
}

/* Resume & Contact Layout */
.contact-grid {
  display: grid;
  grid-template-columns: 340px 1fr;
  gap: 2.5rem;
}

.profile-card {
  padding: 2rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
}

.profile-avatar-frame {
  width: 150px;
  height: 150px;
  border: 2px solid var(--accent-yellow);
  padding: 4px;
  margin-bottom: 1.25rem;
  position: relative;
  background-color: #050608;
}

.profile-avatar-frame img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.profile-callsign {
  font-family: var(--font-mono);
  font-size: 1.8rem;
  font-weight: 900;
  color: var(--accent-yellow);
  letter-spacing: 0.1em;
}

.profile-location {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--text-secondary);
  margin-top: 0.25rem;
  margin-bottom: 1.25rem;
}

.contact-channels {
  width: 100%;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  margin-top: 1.5rem;
  border-top: 1px solid var(--border-subtle);
  padding-top: 1.5rem;
}

.contact-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.6rem 0.8rem;
  background-color: var(--bg-primary);
  border: 1px solid var(--border-color);
  font-family: var(--font-mono);
  font-size: 0.8rem;
}

.contact-item .copy-btn {
  background: none;
  border: none;
  color: var(--accent-yellow);
  cursor: pointer;
  font-size: 0.8rem;
  padding: 0.2rem;
}

.social-links-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.5rem;
  margin-top: 1.25rem;
  width: 100%;
}

.social-btn {
  text-align: center;
  padding: 0.6rem;
  background-color: var(--bg-primary);
  border: 1px solid var(--border-color);
  font-family: var(--font-mono);
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text-primary);
  transition: all var(--transition-speed);
}

.social-btn:hover {
  border-color: var(--accent-yellow);
  color: var(--accent-yellow);
}

/* Resume Detail Section */
.resume-section-block {
  margin-bottom: 2.5rem;
}

.resume-heading {
  font-family: var(--font-mono);
  font-size: 1.2rem;
  font-weight: 700;
  border-bottom: 2px solid var(--accent-yellow);
  padding-bottom: 0.5rem;
  margin-bottom: 1.25rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.skills-matrix {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.25rem;
}

.skill-category-card {
  padding: 1.25rem;
}

.skill-category-title {
  font-family: var(--font-mono);
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--accent-yellow);
  margin-bottom: 0.75rem;
}

.skill-pills {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
}

.skill-pill {
  background-color: var(--bg-primary);
  border: 1px solid var(--border-color);
  font-size: 0.8rem;
  padding: 0.25rem 0.5rem;
  color: var(--text-primary);
}

.timeline-list {
  display: flex;
  flex-direction: column;
  gap: 1.75rem;
  position: relative;
  padding-left: 1.5rem;
}

.timeline-list::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.5rem;
  bottom: 0.5rem;
  width: 2px;
  background-color: var(--border-color);
}

.timeline-item {
  position: relative;
}

.timeline-item::before {
  content: "";
  position: absolute;
  left: -1.85rem;
  top: 0.35rem;
  width: 10px;
  height: 10px;
  background-color: var(--accent-yellow);
  border: 2px solid var(--bg-primary);
  border-radius: 50%;
}

.timeline-date {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--accent-yellow);
  font-weight: 700;
}

.timeline-role {
  font-size: 1.1rem;
  font-weight: 700;
  margin: 0.2rem 0;
}

.timeline-company {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 0.5rem;
}

.timeline-desc {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* Site Footer */
.site-footer {
  margin-top: auto;
  background-color: var(--bg-secondary);
  border-top: 1px solid var(--border-color);
  padding: 3rem 0 2rem;
  font-size: 0.85rem;
  color: var(--text-secondary);
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 2.5rem;
  margin-bottom: 2.5rem;
}

.footer-brand .brand-logo {
  margin-bottom: 1rem;
}

.footer-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.footer-heading {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 1rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.footer-bottom {
  border-top: 1px solid var(--border-subtle);
  padding-top: 1.5rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
  font-family: var(--font-mono);
  font-size: 0.78rem;
}

/* Toast Notifications */
.hud-toast {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  background-color: var(--accent-yellow);
  color: #000000;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 0.85rem;
  padding: 0.75rem 1.25rem;
  box-shadow: 0 4px 20px rgba(0,0,0,0.4);
  z-index: 9999;
  display: none;
  align-items: center;
  gap: 0.5rem;
}

/* Responsive Adjustments */
@media (max-width: 992px) {
  .hero-grid { grid-template-columns: 1fr; }
  .vertical-card { grid-template-columns: 1fr; }
  .contact-grid { grid-template-columns: 1fr; }
  .skills-matrix { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 768px) {
  .nav-menu {
    display: none;
    position: absolute;
    top: 4.5rem;
    left: 0;
    width: 100%;
    background-color: var(--bg-card);
    border-bottom: 1px solid var(--border-color);
    flex-direction: column;
    padding: 1.5rem;
    gap: 1rem;
  }
  .nav-menu.open { display: flex; }
  .menu-toggle-btn { display: block; }
  .hero-title { font-size: 1.9rem; }
  .cards-grid { grid-template-columns: 1fr; }
  .knowledge-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
}