/* ===== Terminal CLI Design System ===== */
/* Brutally functional, high-contrast, authentically retro */

@import url("https://fonts.googleapis.com/css2?family=JetBrains+Mono:wght@400;500;600;700&display=swap");

:root {
  /* Terminal Colors */
  --bg: #0a0a0a;
  --bg-panel: #0d0d0d;
  --primary: #33ff00;
  --secondary: #ffb000;
  --muted: #1f521f;
  --accent: #33ff00;
  --error: #ff3333;
  --border: #1f521f;

  /* Text Colors */
  --text: #33ff00;
  --text-dim: #1f8c1f;
  --text-muted: #145214;
  --text-amber: #ffb000;

  /* Spacing */
  --space-xs: 0.5rem;
  --space-sm: 0.75rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2rem;

  /* Glow Effects */
  --glow-primary: 0 0 5px rgba(51, 255, 0, 0.5);
  --glow-primary-strong: 0 0 10px rgba(51, 255, 0, 0.7);
  --glow-amber: 0 0 5px rgba(255, 176, 0, 0.5);
  --glow-error: 0 0 5px rgba(255, 51, 51, 0.5);
}

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

/* ===== Base ===== */
body {
  font-family: "JetBrains Mono", "Fira Code", "Consolas", monospace;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  line-height: 1.6;
  font-size: 14px;
  position: relative;
}

/* CRT Scanline Overlay */
body::after {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  background: repeating-linear-gradient(
    0deg,
    rgba(0, 0, 0, 0.15) 0px,
    rgba(0, 0, 0, 0.15) 1px,
    transparent 1px,
    transparent 2px
  );
  z-index: 9999;
}

/* ===== Typography ===== */
h1,
h2,
h3,
h4,
h5,
h6 {
  font-family: "JetBrains Mono", monospace;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text);
  text-shadow: var(--glow-primary);
}

h1 {
  font-size: 1.5rem;
  margin-bottom: var(--space-sm);
}
h2 {
  font-size: 1.25rem;
  margin-bottom: var(--space-sm);
}
h3 {
  font-size: 1rem;
  margin-bottom: var(--space-xs);
}

.subtitle {
  color: var(--text-dim);
  font-size: 0.875rem;
  margin-bottom: var(--space-lg);
}

/* ===== Container ===== */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: var(--space-lg);
}

.container-sm {
  max-width: 480px;
}
.container-md {
  max-width: 720px;
}

/* ===== Navigation ===== */
.nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--space-sm) var(--space-lg);
  background: var(--bg);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 100;
}

.nav-brand {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--text);
  text-decoration: none;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  text-shadow: var(--glow-primary);
}

.nav-brand::before {
  content: "> ";
  color: var(--text-dim);
}

.nav-links {
  display: flex;
  gap: var(--space-md);
  align-items: center;
}

.nav-link {
  color: var(--text-dim);
  text-decoration: none;
  font-size: 0.8125rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  transition: all 0.15s ease;
}

.nav-link:hover {
  color: var(--text);
  text-shadow: var(--glow-primary);
}

/* ===== Cards (Terminal Windows) ===== */
.card {
  background: var(--bg);
  border: 1px solid var(--border);
  padding: var(--space-lg);
  position: relative;
}

.card::before {
  content: "+" attr(data-title) "+";
  display: block;
  font-size: 0.75rem;
  color: var(--text-dim);
  margin-bottom: var(--space-md);
  padding-bottom: var(--space-xs);
  border-bottom: 1px dashed var(--border);
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

.card:not([data-title])::before {
  content: "+--- TERMINAL ---+";
}

/* ===== Buttons ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: var(--space-xs) var(--space-md);
  font-family: "JetBrains Mono", monospace;
  font-size: 0.8125rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  background: transparent;
  border: 1px solid var(--border);
  color: var(--text);
  cursor: pointer;
  transition: all 0.1s ease;
  text-decoration: none;
}

.btn::before {
  content: "[ ";
}
.btn::after {
  content: " ]";
}

.btn:hover {
  background: var(--primary);
  color: var(--bg);
  border-color: var(--primary);
  text-shadow: none;
}

.btn-primary {
  border-color: var(--primary);
  box-shadow: var(--glow-primary);
}

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

.btn-secondary:hover {
  background: var(--text-dim);
  color: var(--bg);
  border-color: var(--text-dim);
}

.btn-success {
  border-color: var(--primary);
  color: var(--primary);
}

.btn-block {
  width: 100%;
}

.btn:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

.btn:disabled:hover {
  background: transparent;
  color: var(--text);
}

/* ===== Form Elements ===== */
.form-group {
  margin-bottom: var(--space-md);
}

label {
  display: block;
  font-size: 0.75rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-dim);
  margin-bottom: var(--space-xs);
}

label::before {
  content: "# ";
  color: var(--muted);
}

input[type="text"],
input[type="email"],
input[type="password"] {
  width: 100%;
  padding: var(--space-sm);
  background: var(--bg);
  border: 1px solid var(--border);
  color: var(--text);
  font-family: "JetBrains Mono", monospace;
  font-size: 0.875rem;
  caret-color: var(--primary);
}

input:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: var(--glow-primary);
}

input::placeholder {
  color: var(--text-muted);
}

/* Input with shell prompt */
.input-prompt {
  position: relative;
}

.input-prompt::before {
  content: "user@test:~$ ";
  position: absolute;
  left: var(--space-sm);
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-dim);
  font-size: 0.875rem;
  pointer-events: none;
}

.input-prompt input {
  padding-left: 9rem;
}

/* ===== Alerts ===== */
.alert {
  padding: var(--space-sm) var(--space-md);
  border: 1px solid var(--border);
  margin-bottom: var(--space-md);
  display: none;
  font-size: 0.8125rem;
}

.alert.show {
  display: block;
}

.alert::before {
  font-weight: 600;
  margin-right: 0.5rem;
}

.alert-error {
  border-color: var(--error);
  color: var(--error);
  text-shadow: var(--glow-error);
}

.alert-error::before {
  content: "[ERR]";
}

.alert-success {
  border-color: var(--primary);
  color: var(--primary);
  text-shadow: var(--glow-primary);
}

.alert-success::before {
  content: "[OK]";
}

/* ===== Tables ===== */
.table-container {
  overflow-x: auto;
  border: 1px solid var(--border);
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.8125rem;
}

th,
td {
  padding: var(--space-sm) var(--space-md);
  text-align: left;
  border-bottom: 1px dashed var(--border);
}

th {
  background: var(--bg-panel);
  font-weight: 500;
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  font-size: 0.75rem;
}

tr:last-child td {
  border-bottom: none;
}

tr:hover td {
  background: rgba(51, 255, 0, 0.05);
}

/* ===== Badges ===== */
.badge {
  display: inline-block;
  padding: 0.125rem 0.375rem;
  font-size: 0.6875rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.badge-success {
  color: var(--primary);
  text-shadow: var(--glow-primary);
}

.badge-success::before {
  content: "[";
}
.badge-success::after {
  content: "]";
}

.badge-warning {
  color: var(--secondary);
  text-shadow: var(--glow-amber);
}

.badge-warning::before {
  content: "[";
}
.badge-warning::after {
  content: "]";
}

.badge-danger {
  color: var(--error);
  text-shadow: var(--glow-error);
}

.badge-danger::before {
  content: "[";
}
.badge-danger::after {
  content: "]";
}

/* ===== Progress Bar (ASCII style) ===== */
.progress-bar {
  font-family: "JetBrains Mono", monospace;
  font-size: 0.75rem;
  color: var(--text-dim);
  margin-bottom: var(--space-md);
}

.progress-bar::before {
  content: "[";
}
.progress-bar::after {
  content: "]";
}

.progress-fill {
  display: inline;
  color: var(--primary);
  text-shadow: var(--glow-primary);
}

.progress-text {
  text-align: center;
  color: var(--text-dim);
  font-size: 0.75rem;
  margin-bottom: var(--space-xs);
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

/* ===== Result Card ===== */
.result-card {
  text-align: center;
  padding: var(--space-xl);
}

.score-circle {
  width: 140px;
  height: 140px;
  border: 2px solid var(--primary);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  margin: 0 auto var(--space-xl);
  box-shadow: var(--glow-primary-strong);
}

.score-value {
  font-size: 3rem;
  font-weight: 700;
  color: var(--primary);
  text-shadow: var(--glow-primary-strong);
  line-height: 1;
}

.score-label {
  font-size: 0.6875rem;
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

/* ===== Tabs ===== */
.tabs {
  display: flex;
  gap: 0;
  margin-bottom: var(--space-lg);
  border: 1px solid var(--border);
}

.tab {
  flex: 1;
  padding: var(--space-sm) var(--space-md);
  background: transparent;
  border: none;
  border-right: 1px solid var(--border);
  color: var(--text-dim);
  font-family: "JetBrains Mono", monospace;
  font-size: 0.75rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  cursor: pointer;
  transition: all 0.15s ease;
}

.tab:last-child {
  border-right: none;
}

.tab:hover {
  color: var(--text);
  background: rgba(51, 255, 0, 0.05);
}

.tab.active {
  background: var(--primary);
  color: var(--bg);
}

.tab-content {
  display: none;
}
.tab-content.active {
  display: block;
}

/* ===== Quiz Styles ===== */
.question-card {
  background: var(--bg);
  border: 1px solid var(--border);
  padding: var(--space-lg);
  margin-bottom: var(--space-md);
}

.question-number {
  display: inline-block;
  color: var(--secondary);
  text-shadow: var(--glow-amber);
  font-size: 0.75rem;
  font-weight: 600;
  margin-bottom: var(--space-sm);
  text-transform: uppercase;
}

.question-number::before {
  content: "// ";
}

.question-text {
  font-size: 0.9375rem;
  font-weight: 500;
  margin-bottom: var(--space-md);
  color: var(--text);
}

.options {
  display: flex;
  flex-direction: column;
  gap: 0.375rem;
}

.option {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  padding: var(--space-sm) var(--space-md);
  background: var(--bg);
  border: 1px solid var(--border);
  cursor: pointer;
  transition: all 0.1s ease;
}

.option:hover {
  border-color: var(--text-dim);
}

.option input {
  display: none;
}

.option-radio {
  width: 14px;
  height: 14px;
  border: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.625rem;
  color: transparent;
}

.option.selected {
  border-color: var(--primary);
  background: rgba(51, 255, 0, 0.05);
}

.option.selected .option-radio {
  border-color: var(--primary);
  color: var(--primary);
}

.option.selected .option-radio::after {
  content: "█";
}

.option-text {
  flex: 1;
  font-size: 0.8125rem;
}

/* ===== Spinner ===== */
.spinner {
  width: 16px;
  height: 16px;
  display: inline-block;
  color: var(--primary);
  animation: blink 0.5s steps(1) infinite;
}

.spinner::after {
  content: "█";
}

@keyframes blink {
  0%,
  50% {
    opacity: 1;
  }
  51%,
  100% {
    opacity: 0;
  }
}

/* ===== ASCII Divider ===== */
.divider {
  text-align: center;
  color: var(--muted);
  margin: var(--space-lg) 0;
  font-size: 0.75rem;
  overflow: hidden;
}

.divider::before,
.divider::after {
  content: "════════════════════════════════";
  margin: 0 var(--space-sm);
}

/* ===== Typing Animation ===== */
.typing {
  overflow: hidden;
  white-space: nowrap;
  animation: typing 2s steps(40) forwards;
}

@keyframes typing {
  from {
    width: 0;
  }
  to {
    width: 100%;
  }
}

/* ===== Cursor Blink ===== */
.cursor::after {
  content: "█";
  animation: blink 1s steps(1) infinite;
}

/* ===== Token Display ===== */
.token-display {
  background: var(--bg);
  border: 1px dashed var(--primary);
  padding: var(--space-lg);
  text-align: center;
  margin: var(--space-md) 0;
}

.token-value {
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: 0.2em;
  color: var(--primary);
  text-shadow: var(--glow-primary-strong);
}

.token-label {
  font-size: 0.6875rem;
  color: var(--text-muted);
  margin-top: var(--space-xs);
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

/* ===== Utilities ===== */
.text-center {
  text-align: center;
}
.text-muted {
  color: var(--text-muted);
}
.text-dim {
  color: var(--text-dim);
}
.text-amber {
  color: var(--secondary);
  text-shadow: var(--glow-amber);
}
.text-error {
  color: var(--error);
  text-shadow: var(--glow-error);
}

.mt-1 {
  margin-top: var(--space-xs);
}
.mt-2 {
  margin-top: var(--space-md);
}
.mt-3 {
  margin-top: var(--space-lg);
}
.mb-2 {
  margin-bottom: var(--space-md);
}
.mb-3 {
  margin-bottom: var(--space-lg);
}

/* ===== Responsive ===== */
@media (max-width: 768px) {
  body {
    font-size: 13px;
  }

  .container {
    padding: var(--space-md);
  }
  .card {
    padding: var(--space-md);
  }

  h1 {
    font-size: 1.25rem;
  }
  h2 {
    font-size: 1rem;
  }

  .nav {
    flex-direction: column;
    gap: var(--space-sm);
    text-align: center;
  }

  .tabs {
    flex-direction: column;
  }
  .tab {
    border-right: none;
    border-bottom: 1px solid var(--border);
  }
  .tab:last-child {
    border-bottom: none;
  }
}