/* 02-dark-dev-portfolio — 陈逸飞 Full Stack Developer */

:root {
  --bg: #0F172A;
  --bg-card: #1E293B;
  --bg-terminal: #0D1117;
  --text: #F8FAFC;
  --text-muted: #94A3B8;
  --accent: #22C55E;
  --accent-dim: rgba(34, 197, 94, 0.15);
  --border: #334155;
}

html {
  scroll-behavior: smooth;
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

body {
  font-family: 'DM Sans', sans-serif;
  background-color: var(--bg);
  color: var(--text);
}

.font-display {
  font-family: 'Space Grotesk', sans-serif;
}

.font-mono {
  font-family: 'JetBrains Mono', 'Fira Code', monospace;
}

/* Grid background */
.grid-bg {
  background-image:
    linear-gradient(rgba(34, 197, 94, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(34, 197, 94, 0.03) 1px, transparent 1px);
  background-size: 40px 40px;
}

/* Terminal window */
.terminal {
  background: var(--bg-terminal);
  border: 1px solid var(--border);
  border-radius: 12px;
  overflow: hidden;
}

.terminal-header {
  background: #161B22;
  border-bottom: 1px solid var(--border);
  padding: 10px 16px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.terminal-dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
}

.terminal-body {
  padding: 20px;
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.875rem;
  line-height: 1.7;
}

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

.prompt::before {
  content: '$ ';
}

.comment {
  color: #6B7280;
}

.keyword {
  color: #C084FC;
}

.string {
  color: #FBBF24;
}

.function {
  color: #60A5FA;
}

/* Tech tag */
.tech-tag {
  background: var(--accent-dim);
  color: var(--accent);
  border: 1px solid rgba(34, 197, 94, 0.3);
  font-size: 0.75rem;
  padding: 4px 10px;
  border-radius: 6px;
  font-family: 'JetBrains Mono', monospace;
}

/* Project card */
.dev-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 12px;
  transition: border-color 0.3s ease, transform 0.3s ease, box-shadow 0.3s ease;
}

.dev-card:hover {
  border-color: var(--accent);
  transform: translateY(-4px);
  box-shadow: 0 8px 32px rgba(34, 197, 94, 0.1);
}

.dev-card:focus-within {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
}

/* Nav */
.nav-link {
  position: relative;
  color: var(--text-muted);
  transition: color 0.2s ease;
}

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

.nav-link:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 4px;
  border-radius: 4px;
}

/* Buttons */
.btn-accent {
  background: var(--accent);
  color: var(--bg);
  font-weight: 600;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.btn-accent:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(34, 197, 94, 0.3);
}

.btn-accent:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
}

.btn-ghost {
  border: 1px solid var(--border);
  color: var(--text);
  transition: border-color 0.2s ease, color 0.2s ease;
}

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

.btn-ghost:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
}

/* Blinking cursor */
.cursor-blink::after {
  content: '▋';
  animation: blink 1s step-end infinite;
  color: var(--accent);
}

@keyframes blink {
  50% { opacity: 0; }
}

@media (prefers-reduced-motion: reduce) {
  .cursor-blink::after {
    animation: none;
  }
}

/* Form */
input:focus-visible,
textarea:focus-visible,
select:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 0;
  border-color: var(--accent);
}

/* Skill block */
.skill-block {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-left: 3px solid var(--accent);
  border-radius: 8px;
}

/* Mobile menu */
.mobile-menu {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s ease;
}

.mobile-menu.open {
  max-height: 320px;
}

/* Code block */
.code-block {
  background: var(--bg-terminal);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 16px;
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.8125rem;
  overflow-x: auto;
}