:root {
  /* Ultra-refined Minimalist Engineering Palette */
  --bg: #080808;
  --bg-subtle: #0d0d0d;
  --surface: rgba(255, 255, 255, 0.02);
  --surface-hover: rgba(255, 255, 255, 0.04);
  --surface-active: rgba(255, 255, 255, 0.06);

  --border: rgba(255, 255, 255, 0.08);
  --border-hover: rgba(255, 255, 255, 0.16);
  --border-active: rgba(255, 255, 255, 0.24);

  --text-main: #ffffff;
  --text-muted: #c8c8cf;
  --text-dim: #94949e;

  --accent-sky: #38bdf8;
  --accent-emerald: #10b981;
  --accent-amber: #f59e0b;
  --accent-rose: #f43f5e;

  --font-sans: "Plus Jakarta Sans", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --font-mono: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;

  --max-width: 680px;
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 14px;
}

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

html {
  scroll-behavior: smooth;
  color-scheme: dark;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-sans);
  background-color: var(--bg);
  color: var(--text-main);
  line-height: 1.6;
  padding: 0;
  margin: 0;
  min-height: 100vh;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* Custom Scrollbars */
::-webkit-scrollbar {
  width: 6px;
  height: 6px;
}
::-webkit-scrollbar-track {
  background: transparent;
}
::-webkit-scrollbar-thumb {
  background: rgba(255, 255, 255, 0.12);
  border-radius: var(--radius-sm);
}
::-webkit-scrollbar-thumb:hover {
  background: rgba(255, 255, 255, 0.2);
}

/* Layout Container */
.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 48px 20px 80px 20px;
}

/* Minimalist Top Navigation Header */
nav.nav-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 56px;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--border);
}

.nav-brand {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  color: var(--text-main);
}

.avatar-box {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  border: 1px solid var(--border);
  overflow: hidden;
  background: var(--bg-subtle);
  flex-shrink: 0;
}

.avatar-box img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.brand-meta {
  display: flex;
  flex-direction: column;
}

.brand-title {
  font-weight: 700;
  font-size: 15px;
  letter-spacing: -0.02em;
  color: var(--text-main);
  line-height: 1.2;
}

.brand-handle {
  font-size: 12px;
  color: var(--text-dim);
  font-family: var(--font-mono);
  line-height: 1.2;
  margin-top: 2px;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 6px;
}

.nav-link {
  color: var(--text-muted);
  text-decoration: none;
  font-size: 13px;
  font-weight: 500;
  padding: 6px 10px;
  border-radius: var(--radius-sm);
  transition: all 0.15s ease;
}

.nav-link:hover {
  color: var(--text-main);
  background: var(--surface-hover);
}

/* Sleek Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 7px;
  padding: 7px 13px;
  border-radius: var(--radius-sm);
  font-size: 13px;
  font-weight: 500;
  text-decoration: none;
  cursor: pointer;
  transition: all 0.15s ease;
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text-main);
  font-family: var(--font-sans);
  line-height: 1.3;
}

.btn:hover {
  background: var(--surface-hover);
  border-color: var(--border-hover);
  color: #fff;
}

.btn-primary {
  background: #ffffff;
  color: #000000;
  border-color: #ffffff;
  font-weight: 600;
}

.btn-primary:hover {
  background: #e5e5ea;
  border-color: #e5e5ea;
  color: #000000;
}

/* Hero Section */
.hero-section {
  margin-bottom: 56px;
}

.hero-title {
  font-size: clamp(30px, 4.5vw, 38px);
  font-weight: 800;
  line-height: 1.2;
  letter-spacing: -0.03em;
  margin-bottom: 16px;
  color: var(--text-main);
}

.hero-subtitle {
  font-size: 16.5px;
  color: var(--text-muted);
  font-weight: 450;
  line-height: 1.7;
  margin-bottom: 24px;
}

.hero-subtitle strong {
  color: var(--text-main);
  font-weight: 600;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-items: center;
}

.location-tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 12.5px;
  font-weight: 500;
  color: var(--text-dim);
  font-family: var(--font-mono);
  padding: 6px 11px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--surface);
}

/* Section Header */
.section {
  margin-bottom: 56px;
}

.section-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 24px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--border);
}

.section-title {
  font-size: 13.5px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-dim);
  display: flex;
  align-items: center;
  gap: 8px;
}

/* Projects List (Tactile Row-based Engineering Feed) */
.projects-feed {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.project-item {
  display: block;
  text-decoration: none;
  padding: 20px 20px;
  border-radius: var(--radius-md);
  border: 1px solid transparent;
  background: transparent;
  transition: background 0.15s ease, border-color 0.15s ease, transform 0.15s ease;
}

.project-item:hover {
  background: var(--surface-hover);
  border-color: var(--border);
}

.project-header {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 12px;
  margin-bottom: 6px;
}

.project-title-group {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}

.project-name {
  font-size: 17.5px;
  font-weight: 700;
  color: var(--text-main);
  letter-spacing: -0.015em;
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.project-item:hover .project-name {
  color: #ffffff;
}

.arrow-icon {
  font-size: 15px;
  color: var(--text-dim);
  transition: transform 0.15s ease, color 0.15s ease;
}

.project-item:hover .arrow-icon {
  color: var(--text-main);
  transform: translate(2px, -2px);
}

.project-badge {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 600;
  color: var(--accent-sky);
  background: rgba(56, 189, 248, 0.08);
  border: 1px solid rgba(56, 189, 248, 0.2);
  padding: 2px 8px;
  border-radius: var(--radius-sm);
}

.project-badge.stats {
  color: var(--text-muted);
  background: rgba(255, 255, 255, 0.05);
  border-color: var(--border);
}

.project-date {
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 500;
  color: var(--text-dim);
  flex-shrink: 0;
  white-space: nowrap;
}

.project-meta-row {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 9px;
}

.project-role {
  font-size: 13px;
  font-weight: 600;
  color: #a1a1aa;
}

.project-desc {
  font-size: 15px;
  font-weight: 450;
  color: var(--text-muted);
  line-height: 1.65;
  margin-bottom: 12px;
}

.project-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 7px;
}

.tag {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 550;
  color: #a1a1aa;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.12);
  padding: 3px 8px;
  border-radius: var(--radius-sm);
  transition: all 0.15s ease;
}

.project-item:hover .tag {
  color: #ffffff;
  background: rgba(255, 255, 255, 0.07);
  border-color: rgba(255, 255, 255, 0.22);
}

/* Minimal Terminal Widget */
.terminal-block {
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  background: var(--bg-subtle);
  overflow: hidden;
  margin-top: 16px;
}

.terminal-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 14px;
  border-bottom: 1px solid var(--border);
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 500;
  color: var(--text-dim);
  background: rgba(255, 255, 255, 0.015);
}

.terminal-prompt-label {
  display: flex;
  align-items: center;
  gap: 6px;
  color: var(--text-muted);
}

.terminal-output {
  height: 170px;
  overflow-y: auto;
  padding: 14px;
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 500;
  line-height: 1.6;
  color: var(--text-muted);
  background: var(--bg);
}

.terminal-input-row {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 14px;
  border-top: 1px solid var(--border);
  background: var(--bg-subtle);
}

.terminal-input-row span {
  color: var(--accent-sky);
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 13px;
}

.terminal-input-row input {
  flex: 1;
  background: transparent;
  border: none;
  outline: none;
  color: var(--text-main);
  font-family: var(--font-mono);
  font-size: 13.5px;
  font-weight: 500;
}

/* Footer */
footer {
  margin-top: 64px;
  padding-top: 24px;
  border-top: 1px solid var(--border);
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 14px;
  font-size: 13px;
  color: var(--text-dim);
}

footer a {
  color: var(--text-muted);
  text-decoration: none;
  transition: color 0.15s ease;
}

footer a:hover {
  color: var(--text-main);
}

.footer-links {
  display: flex;
  gap: 16px;
  align-items: center;
}

/* Toast */
.toast {
  position: fixed;
  bottom: 24px;
  right: 24px;
  background: #181818;
  border: 1px solid var(--border-hover);
  color: var(--text-main);
  padding: 10px 16px;
  border-radius: var(--radius-sm);
  font-size: 12px;
  font-weight: 500;
  opacity: 0;
  transform: translateY(8px);
  transition: opacity 0.2s ease, transform 0.2s ease;
  pointer-events: none;
  z-index: 1000;
}

.toast.show {
  opacity: 1;
  transform: translateY(0);
}

/* Donate Page Styling */
.donate-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  margin: 24px 0;
}

.sponsor-card {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 16px;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  background: var(--surface);
  text-decoration: none;
  color: inherit;
  transition: all 0.15s ease;
}

.sponsor-card:hover {
  background: var(--surface-hover);
  border-color: var(--border-hover);
}

.sponsor-icon {
  width: 38px;
  height: 38px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-main);
  background: var(--bg);
  flex-shrink: 0;
}

.sponsor-info strong {
  display: block;
  font-size: 14px;
  font-weight: 600;
  color: var(--text-main);
}

.sponsor-info span {
  font-size: 12px;
  color: var(--text-dim);
}

.crypto-section {
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  background: var(--bg-subtle);
  padding: 18px;
  margin-top: 24px;
}

.crypto-tabs {
  display: flex;
  gap: 6px;
  overflow-x: auto;
  padding-bottom: 10px;
  margin-bottom: 14px;
  border-bottom: 1px solid var(--border);
}

.crypto-tab {
  background: transparent;
  border: 1px solid transparent;
  color: var(--text-dim);
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 500;
  padding: 5px 10px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all 0.15s ease;
}

.crypto-tab:hover {
  color: var(--text-main);
}

.crypto-tab.active {
  background: var(--surface-active);
  color: var(--text-main);
  border-color: var(--border);
}

.crypto-well {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 14px;
  margin-bottom: 14px;
}

.crypto-net {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--accent-sky);
  margin-bottom: 4px;
}

.crypto-address {
  font-family: var(--font-mono);
  font-size: 12.5px;
  color: var(--text-main);
  word-break: break-all;
  line-height: 1.5;
}

.qr-wrap {
  display: none;
  text-align: center;
  margin-bottom: 14px;
}

.qr-box {
  display: inline-block;
  padding: 6px;
  background: #ffffff;
  border-radius: var(--radius-sm);
}

.qr-box img {
  width: 140px;
  height: auto;
  display: block;
}

.btn-upi {
  display: none;
  width: 100%;
  padding: 9px;
  border-radius: var(--radius-sm);
  background: var(--surface-hover);
  border: 1px solid var(--border-hover);
  color: var(--text-main);
  font-size: 13px;
  font-weight: 500;
  text-decoration: none;
  justify-content: center;
  align-items: center;
  margin-bottom: 8px;
}

.btn-upi:hover {
  background: var(--surface-active);
}

/* Responsive Media Queries */
@media (max-width: 640px) {
  .container {
    padding: 24px 16px 60px 16px;
  }

  nav.nav-header {
    margin-bottom: 36px;
    padding-bottom: 16px;
  }

  .brand-handle {
    display: none;
  }

  .nav-links {
    gap: 2px;
  }

  .nav-link {
    font-size: 12px;
    padding: 6px 8px;
  }

  .btn {
    font-size: 12px;
    padding: 6px 10px;
  }

  .hero-section {
    margin-bottom: 40px;
  }

  .hero-title {
    font-size: 26px;
  }

  .hero-subtitle {
    font-size: 15px;
  }

  .hero-actions {
    gap: 6px;
  }

  .project-header {
    flex-direction: column;
    align-items: flex-start;
    gap: 4px;
  }

  .project-item {
    padding: 14px 12px;
  }

  .donate-grid {
    grid-template-columns: 1fr;
  }

  /* Prevent iOS zoom on input */
  .terminal-input-row input {
    font-size: 16px;
  }

  footer {
    flex-direction: column;
    text-align: center;
    gap: 12px;
  }

  .footer-links {
    justify-content: center;
  }
}