/* ============================================================
   PHP.exe — Estilos cyberpunk (dark padrão / light alternativo)
   ============================================================ */

:root {
  --neon-green: #39ff8a;
  --neon-green-soft: #1fae63;
  --neon-orange: #ff8a1e;
  --neon-orange-soft: #cc6200;
  --font-mono: 'Courier New', Courier, monospace;
  --font-body: 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
  --radius: 10px;
  --transition: 180ms ease;
}

[data-theme="dark"] {
  --bg: #060810;
  --bg-alt: #0b0f1c;
  --surface: #11172a;
  --surface-2: #161d33;
  --text: #e7fbf1;
  --text-dim: #9db3c9;
  --border: rgba(57, 255, 138, 0.28);
  --shadow-color: rgba(57, 255, 138, 0.25);
  --code-bg: #05070d;
}

[data-theme="light"] {
  --bg: #eef3f7;
  --bg-alt: #e2eaf1;
  --surface: #ffffff;
  --surface-2: #f4f8fb;
  --text: #0c1a24;
  --text-dim: #3f5566;
  --border: rgba(18, 164, 84, 0.35);
  --shadow-color: rgba(18, 164, 84, 0.18);
  --code-bg: #0c1a24;
  --neon-green: #12a454;
  --neon-orange: #d9560c;
}

* { box-sizing: border-box; }
[hidden] { display: none !important; }

html, body {
  margin: 0;
  padding: 0;
  min-height: 100%;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  scroll-behavior: smooth;
}

body {
  position: relative;
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  z-index: 100;
  background: var(--neon-green);
  color: #05070d;
  padding: 0.6rem 1rem;
  border-radius: 0 0 var(--radius) 0;
  font-weight: 700;
}
.skip-link:focus { left: 0; }

.visually-hidden {
  position: absolute !important;
  width: 1px; height: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
}

/* ---------- Fundo cyberpunk ---------- */
.bg-grid {
  position: fixed; inset: 0;
  z-index: -3;
  background-image:
    linear-gradient(var(--border) 1px, transparent 1px),
    linear-gradient(90deg, var(--border) 1px, transparent 1px);
  background-size: 42px 42px;
  background-position: center;
  mask-image: radial-gradient(ellipse at 50% 0%, black 40%, transparent 85%);
  animation: grid-drift 18s linear infinite;
  opacity: 0.6;
}
@keyframes grid-drift {
  0% { background-position: 0 0; }
  100% { background-position: 42px 84px; }
}

#fx-canvas {
  position: fixed; inset: 0;
  z-index: -2;
  width: 100%; height: 100%;
  pointer-events: none;
  opacity: 0.55;
}
[data-theme="light"] #fx-canvas { opacity: 0.3; }

.scanlines {
  position: fixed; inset: 0;
  z-index: 50;
  pointer-events: none;
  background: repeating-linear-gradient(
    to bottom,
    rgba(0,0,0,0.06) 0px,
    rgba(0,0,0,0.06) 1px,
    transparent 2px,
    transparent 3px
  );
  opacity: 0.35;
  mix-blend-mode: overlay;
}
[data-theme="light"] .scanlines { opacity: 0.08; }

@media (prefers-reduced-motion: reduce) {
  .bg-grid { animation: none; }
  * { animation-duration: 0.001ms !important; animation-iteration-count: 1 !important; transition-duration: 0.001ms !important; }
}

/* ---------- Header ---------- */
.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.9rem 1.5rem;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  flex-wrap: wrap;
  position: sticky;
  top: 0;
  z-index: 20;
  backdrop-filter: blur(6px);
}

.brand { display: flex; align-items: center; gap: 0.6rem; text-decoration: none; }
.brand:focus-visible { outline: 2px solid var(--neon-green); outline-offset: 4px; border-radius: 4px; }
.brand-mark {
  font-family: var(--font-mono);
  color: var(--neon-orange);
  font-size: 1.4rem;
  text-shadow: 0 0 10px var(--neon-orange);
}

h1, h2, h3 { font-family: var(--font-mono); margin: 0; }

.glitch {
  position: relative;
  color: var(--neon-green);
  font-size: 1.5rem;
  letter-spacing: 1px;
  text-shadow: 0 0 8px var(--shadow-color), 0 0 18px var(--shadow-color);
}
.glitch.glitching::before,
.glitch.glitching::after {
  content: attr(data-text);
  position: absolute; left: 0; top: 0;
  width: 100%; overflow: hidden;
  background: transparent;
}
.glitch.glitching::before {
  color: var(--neon-orange);
  clip-path: inset(0 0 55% 0);
  transform: translate(-2px, -1px);
}
.glitch.glitching::after {
  color: #4fd8ff;
  clip-path: inset(55% 0 0 0);
  transform: translate(2px, 1px);
}

.header-actions { display: flex; align-items: center; gap: 0.75rem; }

.student-badge {
  display: flex; align-items: center; gap: 0.4rem;
  background: var(--surface-2);
  border: 1px solid var(--border);
  padding: 0.35rem 0.7rem;
  border-radius: 999px;
  font-size: 0.85rem;
  color: var(--text-dim);
}
.badge-icon { color: var(--neon-green); }

.icon-btn {
  background: var(--surface-2);
  border: 1px solid var(--border);
  color: var(--text);
  width: 2.2rem; height: 2.2rem;
  border-radius: 50%;
  cursor: pointer;
  display: inline-flex; align-items: center; justify-content: center;
  font-size: 1rem;
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
}
.icon-btn:hover, .icon-btn:focus-visible { box-shadow: 0 0 12px var(--shadow-color); border-color: var(--neon-green); transform: translateY(-1px); }
.icon-btn:focus-visible { outline: 2px solid var(--neon-green); outline-offset: 2px; }

/* ---------- Barra de progresso global ---------- */
.progress-nav {
  display: flex; align-items: center; gap: 0.75rem;
  padding: 0.5rem 1.5rem;
  background: var(--bg-alt);
  border-bottom: 1px solid var(--border);
  font-size: 0.8rem;
  color: var(--text-dim);
}
.progress-track {
  flex: 1;
  height: 8px;
  background: var(--surface-2);
  border-radius: 999px;
  overflow: hidden;
  border: 1px solid var(--border);
}
.progress-fill {
  height: 100%;
  width: 0%;
  background: linear-gradient(90deg, var(--neon-green), var(--neon-orange));
  box-shadow: 0 0 10px var(--shadow-color);
  transition: width 400ms ease;
}

/* ---------- Main / view ---------- */
.view {
  flex: 1;
  width: min(1000px, 92%);
  margin: 0 auto;
  padding: 2rem 0 4rem;
}
.view:focus { outline: none; }

/* ---------- Botões ---------- */
.btn {
  font-family: var(--font-mono);
  font-size: 0.95rem;
  padding: 0.65rem 1.4rem;
  border-radius: var(--radius);
  border: 1px solid var(--neon-green);
  background: transparent;
  color: var(--neon-green);
  cursor: pointer;
  transition: all var(--transition);
  text-shadow: 0 0 6px var(--shadow-color);
}
.btn:hover, .btn:focus-visible { background: var(--neon-green); color: #05070d; box-shadow: 0 0 18px var(--shadow-color); text-shadow: none; }
.btn:focus-visible { outline: 2px solid var(--neon-orange); outline-offset: 2px; }
.btn.secondary { border-color: var(--neon-orange); color: var(--neon-orange); }
.btn.secondary:hover, .btn.secondary:focus-visible { background: var(--neon-orange); color: #05070d; }
.btn:disabled { opacity: 0.4; cursor: not-allowed; }
.btn-row { display: flex; gap: 0.8rem; flex-wrap: wrap; margin-top: 1.5rem; }

/* ---------- Tela de boas-vindas ---------- */
.welcome {
  text-align: center;
  padding: 2rem 1rem;
  animation: fade-up 500ms ease;
}
.welcome h2 { font-size: 1.8rem; color: var(--neon-green); margin-bottom: 0.5rem; }
.welcome p { color: var(--text-dim); max-width: 60ch; margin: 0.5rem auto 1.5rem; }
.welcome form {
  display: flex; flex-direction: column; gap: 1rem;
  max-width: 420px; margin: 0 auto;
}
.field { text-align: left; }
.field label { display: block; margin-bottom: 0.4rem; font-size: 0.9rem; color: var(--text-dim); }
.field input {
  width: 100%;
  padding: 0.75rem 1rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--text);
  font-family: var(--font-mono);
  font-size: 1rem;
}
.field input:focus-visible { outline: 2px solid var(--neon-green); border-color: var(--neon-green); }
.field .error { color: var(--neon-orange); font-size: 0.8rem; min-height: 1.2em; display: block; margin-top: 0.3rem; }

@keyframes fade-up {
  from { opacity: 0; transform: translateY(12px); }
  to { opacity: 1; transform: translateY(0); }
}

/* ---------- Dashboard / módulos ---------- */
.dashboard-head { margin-bottom: 1.5rem; }
.dashboard-head h2 { color: var(--neon-green); font-size: 1.6rem; }
.dashboard-head p { color: var(--text-dim); }

.module-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1.25rem;
}

.module-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.25rem;
  display: flex; flex-direction: column; gap: 0.75rem;
  position: relative;
  overflow: hidden;
  transition: transform var(--transition), box-shadow var(--transition);
}
.module-card::before {
  content: "";
  position: absolute; inset: 0;
  background: linear-gradient(135deg, transparent 60%, var(--shadow-color));
  opacity: 0; transition: opacity var(--transition);
}
.module-card:hover::before { opacity: 1; }
.module-card:hover { transform: translateY(-4px); box-shadow: 0 8px 24px var(--shadow-color); }
.module-card.locked { opacity: 0.55; }
.module-card .module-icon { font-size: 1.8rem; color: var(--neon-orange); }
.module-card h3 { color: var(--text); font-size: 1.15rem; }
.module-card p { color: var(--text-dim); font-size: 0.9rem; flex: 1; }
.module-card .card-progress { font-size: 0.78rem; color: var(--neon-green); font-family: var(--font-mono); }
.lock-note { font-size: 0.78rem; color: var(--text-dim); font-style: italic; }

/* ---------- Lição ---------- */
.breadcrumb { font-size: 0.85rem; color: var(--text-dim); margin-bottom: 0.75rem; }
.breadcrumb a { color: var(--neon-green); text-decoration: none; }
.breadcrumb a:hover { text-decoration: underline; }

.lesson-title { color: var(--neon-green); font-size: 1.5rem; margin-bottom: 1rem; }

.lesson-block { margin-bottom: 1.4rem; line-height: 1.65; }
.lesson-block p { margin: 0.5rem 0; }
.lesson-block code.inline { background: var(--surface-2); padding: 0.1rem 0.4rem; border-radius: 4px; font-family: var(--font-mono); color: var(--neon-orange); }
.lesson-block ul { padding-left: 1.4rem; }

pre.code-block {
  background: var(--code-bg);
  border: 1px solid var(--border);
  border-left: 3px solid var(--neon-green);
  border-radius: var(--radius);
  padding: 1rem 1.2rem;
  overflow-x: auto;
  font-family: var(--font-mono);
  font-size: 0.9rem;
  line-height: 1.5;
  color: #d7ffe9;
  box-shadow: inset 0 0 20px rgba(0,0,0,0.3);
}
[data-theme="light"] pre.code-block { color: #eafff2; }

.tok-kw { color: #ff8a1e; font-weight: bold; }
.tok-var { color: #4fd8ff; }
.tok-str { color: #39ff8a; }
.tok-com { color: #6b7d8f; font-style: italic; }
.tok-fn { color: #ffd54f; }
.tok-num { color: #c792ea; }

/* ---------- Perguntas interativas ---------- */
.question-box {
  background: var(--surface-2);
  border: 1px dashed var(--border);
  border-radius: var(--radius);
  padding: 1rem 1.2rem;
  margin: 1rem 0;
}
.question-box .q-prompt { font-weight: 600; margin-bottom: 0.75rem; }
.q-options { list-style: none; padding: 0; margin: 0; display: flex; flex-direction: column; gap: 0.5rem; }
.q-options button {
  width: 100%;
  text-align: left;
  padding: 0.6rem 0.9rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--text);
  cursor: pointer;
  font-family: var(--font-mono);
  transition: all var(--transition);
}
.q-options button:hover, .q-options button:focus-visible { border-color: var(--neon-green); box-shadow: 0 0 10px var(--shadow-color); }
.q-options button.correct { border-color: var(--neon-green); background: rgba(57,255,138,0.15); }
.q-options button.wrong { border-color: #ff4d4d; background: rgba(255,77,77,0.12); }
.q-options button:disabled { cursor: default; }

.fill-form { display: flex; gap: 0.6rem; flex-wrap: wrap; }
.fill-form input {
  flex: 1; min-width: 180px;
  padding: 0.6rem 0.9rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--text);
  font-family: var(--font-mono);
}
.fill-form input:focus-visible { outline: 2px solid var(--neon-green); }

.q-feedback { margin-top: 0.6rem; font-size: 0.9rem; min-height: 1.4em; }
.q-feedback.ok { color: var(--neon-green); }
.q-feedback.no { color: #ff6b6b; }

/* ---------- Quiz ---------- */
.quiz-progress { color: var(--text-dim); font-size: 0.85rem; margin-bottom: 0.5rem; }
.quiz-result { text-align: center; padding: 2rem 1rem; }
.quiz-result .score { font-size: 2.5rem; color: var(--neon-green); font-family: var(--font-mono); text-shadow: 0 0 12px var(--shadow-color); }

/* ---------- Toast ---------- */
.toast-region {
  position: fixed; bottom: 1.2rem; right: 1.2rem;
  display: flex; flex-direction: column; gap: 0.5rem;
  z-index: 60;
}
.toast {
  background: var(--surface);
  border: 1px solid var(--neon-green);
  color: var(--text);
  padding: 0.7rem 1rem;
  border-radius: 8px;
  box-shadow: 0 0 16px var(--shadow-color);
  font-size: 0.9rem;
  animation: toast-in 220ms ease;
}
@keyframes toast-in { from { opacity: 0; transform: translateY(8px); } to { opacity: 1; transform: translateY(0); } }

/* ---------- Footer ---------- */
.site-footer {
  text-align: center;
  padding: 1.2rem;
  font-size: 0.78rem;
  color: var(--text-dim);
  border-top: 1px solid var(--border);
  background: var(--bg-alt);
}

/* ---------- Responsivo ---------- */
@media (max-width: 640px) {
  .site-header { padding: 0.7rem 1rem; }
  .glitch { font-size: 1.2rem; }
  .view { width: 94%; padding: 1.25rem 0 3rem; }
  .module-grid { grid-template-columns: 1fr; }
}