/* ============================================
   MAIN STYLESHEET - QA Portfolio
   ============================================ */

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

:root {
  --color-bg:          #0d1117;
  --color-bg-alt:      #161b22;
  --color-bg-card:     #1c2128;
  --color-border:      #30363d;
  --color-primary:     #58a6ff;
  --color-primary-dim: #1f6feb;
  --color-accent:      #3fb950;
  --color-warn:        #d29922;
  --color-danger:      #f85149;
  --color-text:        #e6edf3;
  --color-text-muted:  #8b949e;
  --color-text-faint:  #484f58;
  --font-sans:         'Inter', system-ui, -apple-system, sans-serif;
  --font-mono:         'JetBrains Mono', 'Fira Code', monospace;
  --radius:            8px;
  --radius-lg:         12px;
  --shadow:            0 4px 24px rgba(0,0,0,0.4);
  --transition:        0.2s ease;
  --nav-height:        64px;
  --max-width:         1100px;
}

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

body {
  background-color: var(--color-bg);
  color: var(--color-text);
  font-family: var(--font-sans);
  line-height: 1.6;
  min-height: 100vh;
}

/* --- Typography --- */
h1, h2, h3, h4, h5, h6 {
  line-height: 1.25;
  font-weight: 700;
  letter-spacing: -0.01em;
}

h1 { font-size: clamp(2rem, 5vw, 3.5rem); }
h2 { font-size: clamp(1.5rem, 3vw, 2.25rem); }
h3 { font-size: clamp(1.1rem, 2vw, 1.4rem); }
h4 { font-size: 1.1rem; }

p { color: var(--color-text-muted); }

a {
  color: var(--color-primary);
  text-decoration: none;
  transition: color var(--transition);
}
a:hover { color: #fff; }

code, .mono {
  font-family: var(--font-mono);
  font-size: 0.875em;
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: 4px;
  padding: 2px 6px;
}

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

section {
  padding: 80px 0;
}

.section-label {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--color-primary);
  margin-bottom: 0.75rem;
}

.section-title {
  color: var(--color-text);
  margin-bottom: 1rem;
}

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

/* --- Navigation --- */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--nav-height);
  background: rgba(13, 17, 23, 0.85);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border);
  z-index: 1000;
  transition: background var(--transition);
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 1.5rem;
}

.nav-logo {
  font-family: var(--font-mono);
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--color-text);
  letter-spacing: -0.02em;
}

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

.nav-links {
  display: flex;
  gap: 0.25rem;
  list-style: none;
}

.nav-links a {
  display: block;
  padding: 0.4rem 0.8rem;
  border-radius: var(--radius);
  color: var(--color-text-muted);
  font-size: 0.9rem;
  font-weight: 500;
  transition: all var(--transition);
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--color-text);
  background: var(--color-bg-alt);
}

.nav-cta {
  background: var(--color-primary-dim) !important;
  color: var(--color-text) !important;
  border: 1px solid var(--color-primary) !important;
}

.nav-cta:hover {
  background: var(--color-primary) !important;
}

/* Hamburger */
.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: 4px;
}

.nav-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--color-text);
  border-radius: 2px;
  transition: all 0.3s ease;
}

@media (max-width: 768px) {
  .nav-toggle { display: flex; }

  .nav-links {
    display: none;
    position: absolute;
    top: var(--nav-height);
    left: 0;
    right: 0;
    background: var(--color-bg-alt);
    border-bottom: 1px solid var(--color-border);
    flex-direction: column;
    padding: 1rem 1.5rem;
    gap: 0.25rem;
  }

  .nav-links.open { display: flex; }

  .nav-links a { padding: 0.6rem 0.8rem; }
}

/* --- Buttons --- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.6rem 1.25rem;
  border-radius: var(--radius);
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition);
  border: none;
  text-decoration: none;
  white-space: nowrap;
}

.btn-primary {
  background: var(--color-primary-dim);
  color: var(--color-text);
  border: 1px solid var(--color-primary);
}
.btn-primary:hover {
  background: var(--color-primary);
  color: #fff;
  box-shadow: 0 0 20px rgba(88, 166, 255, 0.3);
}

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

.btn-accent {
  background: rgba(63,185,80,0.15);
  color: var(--color-accent);
  border: 1px solid var(--color-accent);
}
.btn-accent:hover {
  background: var(--color-accent);
  color: #000;
}

/* --- Cards --- */
.card {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  transition: border-color var(--transition), transform var(--transition);
}

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

/* --- Badges / Tags --- */
.tag {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  padding: 3px 10px;
  border-radius: 20px;
  border: 1px solid;
  white-space: nowrap;
}

.tag-blue   { color: var(--color-primary); border-color: var(--color-primary); background: rgba(88,166,255,0.08); }
.tag-green  { color: var(--color-accent);  border-color: var(--color-accent);  background: rgba(63,185,80,0.08); }
.tag-yellow { color: var(--color-warn);    border-color: var(--color-warn);    background: rgba(210,153,34,0.08); }
.tag-red    { color: var(--color-danger);  border-color: var(--color-danger);  background: rgba(248,81,73,0.08); }
.tag-muted  { color: var(--color-text-muted); border-color: var(--color-border); background: var(--color-bg-alt); }

/* --- Grid utilities --- */
.grid-2 { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 1.5rem; }
.grid-3 { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 1.5rem; }
.grid-4 { display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); gap: 1rem; }

/* --- Divider --- */
.divider {
  border: none;
  border-top: 1px solid var(--color-border);
  margin: 2rem 0;
}

/* --- Pill status indicators --- */
.status {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.75rem;
  font-weight: 600;
  font-family: var(--font-mono);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.status::before {
  content: '';
  width: 8px;
  height: 8px;
  border-radius: 50%;
  flex-shrink: 0;
}

.status-resolved { color: var(--color-accent); }
.status-resolved::before { background: var(--color-accent); box-shadow: 0 0 6px var(--color-accent); }

.status-critical { color: var(--color-danger); }
.status-critical::before { background: var(--color-danger); box-shadow: 0 0 6px var(--color-danger); }

.status-wip { color: var(--color-warn); }
.status-wip::before { background: var(--color-warn); }

/* --- Footer --- */
footer {
  border-top: 1px solid var(--color-border);
  padding: 2.5rem 0;
  text-align: center;
  color: var(--color-text-muted);
  font-size: 0.875rem;
}

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

/* --- Page header (inner pages) --- */
.page-header {
  padding: calc(var(--nav-height) + 60px) 0 60px;
  border-bottom: 1px solid var(--color-border);
  background: linear-gradient(180deg, var(--color-bg-alt) 0%, var(--color-bg) 100%);
}

/* --- Scroll margin for anchor links --- */
[id] { scroll-margin-top: calc(var(--nav-height) + 20px); }

/* --- Fade-in animation --- */
.fade-in {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.5s ease, transform 0.5s ease;
}

.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

/* --- Highlight code-style text --- */
.highlight {
  color: var(--color-primary);
  font-weight: 700;
}

.highlight-green { color: var(--color-accent); font-weight: 700; }

/* --- Terminal block --- */
.terminal {
  background: #010409;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 1.25rem 1.5rem;
  font-family: var(--font-mono);
  font-size: 0.875rem;
  color: var(--color-accent);
  overflow-x: auto;
}

.terminal .prompt { color: var(--color-primary); }
.terminal .comment { color: var(--color-text-faint); }
.terminal .output { color: var(--color-text-muted); }