/* ===== DARK THEME: #F7B538 + #780116 + FLOATING SYMBOLS ===== */

:root {
  --color-primary: #F7B538;
  --color-primary-dark: #E5A42E;
  --color-on-primary: #000;
  --color-secondary: #FFD166;
  --color-accent: #F7B538;
  --color-bg-dark: #780116;
  --color-background: #0f0206;
  --color-surface: #1a0a10;
  --color-surface-2: #230f18;
  --color-foreground: #f5f0eb;
  --color-muted: #9a8a8e;
  --color-border: rgba(247, 181, 56, 0.1);
  --color-border-hover: rgba(247, 181, 56, 0.25);
  --color-ring: #F7B538;
  --color-orange: #F7B538;
  --color-red: #780116;
  --color-green: #10b981;
  --color-accent-glow: rgba(247, 181, 56, 0.25);
  --color-red-glow: rgba(120, 1, 22, 0.3);

  --radius: 24px;
  --radius-sm: 16px;
  --radius-xs: 10px;

  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 12px 32px rgba(0, 0, 0, 0.5);

  --ease: cubic-bezier(0.23, 1, 0.32, 1);
}

/* ===== BASE ===== */
body {
  background: var(--color-background);
  color: var(--color-foreground);
  overflow-x: hidden;
}

a { color: var(--color-primary); }
a:hover { color: var(--color-secondary); }

::selection {
  background: rgba(247, 181, 56, 0.3);
  color: #fff;
}

/* ===== HEADER ===== */
header, .navbar {
  background: rgba(15, 2, 6, 0.92) !important;
  border-bottom-color: var(--color-border) !important;
  backdrop-filter: blur(20px) !important;
}

.logo-icon {
  background: linear-gradient(135deg, var(--color-primary), var(--color-red)) !important;
  color: #fff !important;
  box-shadow: 0 4px 15px var(--color-accent-glow) !important;
}

.logo-text { color: var(--color-foreground) !important; }

.nav-links a { color: var(--color-muted) !important; }
.nav-links a:hover, .nav-links a.active {
  color: var(--color-primary) !important;
  background: rgba(247, 181, 56, 0.08) !important;
}

/* ===== CARDS ===== */
.card, .feature-card, .module-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  transition: all 0.4s var(--ease);
  position: relative;
  overflow: hidden;
}

.module-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background: linear-gradient(90deg, var(--color-primary), var(--color-red));
  opacity: 0;
  transition: opacity 0.4s;
}

.module-card:hover::before {
  opacity: 1;
}

.card:hover, .feature-card:hover, .module-card:hover {
  border-color: var(--color-border-hover);
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.4), 0 0 30px var(--color-accent-glow);
  transform: translateY(-6px);
}

/* ===== LESSON CONTENT ===== */
.lesson-content > .container,
.lesson-wrapper .lesson,
.module-header {
  background: var(--color-surface) !important;
  border-color: var(--color-border) !important;
  box-shadow: var(--shadow-md) !important;
}

.module-header {
  background: linear-gradient(135deg, var(--color-surface), rgba(120, 1, 22, 0.08)) !important;
}

.module-header::before {
  background: linear-gradient(180deg, var(--color-primary), var(--color-red)) !important;
}

.lesson h1 {
  border-bottom-color: var(--color-border) !important;
  color: var(--color-foreground) !important;
}

.lesson h2, .lesson-section > h2 {
  color: var(--color-primary) !important;
}

.lesson h2::before, .lesson-section > h2::before {
  background: linear-gradient(180deg, var(--color-primary), var(--color-red)) !important;
}

.lesson-content p { color: var(--color-foreground) !important; }
.lesson-content li { color: var(--color-muted) !important; }
.lesson-content li strong { color: var(--color-foreground) !important; }

/* ===== CODE BLOCKS ===== */
.lesson-content pre, .code-block pre {
  background: #0a0508 !important;
  border: 1px solid rgba(247, 181, 56, 0.1) !important;
  color: #e8ddd5 !important;
  border-radius: var(--radius-sm) !important;
}

.code-block .code-header {
  background: var(--color-surface-2) !important;
  color: var(--color-muted) !important;
  border-bottom: 1px solid var(--color-border) !important;
}

.lesson-content code {
  background: rgba(247, 181, 56, 0.1) !important;
  color: var(--color-primary) !important;
  border: 1px solid rgba(247, 181, 56, 0.15) !important;
  border-radius: var(--radius-xs) !important;
}

/* ===== QUIZ ===== */
.quiz {
  background: var(--color-surface) !important;
  border: 1px solid var(--color-border) !important;
  border-radius: var(--radius-sm) !important;
}

.quiz-option {
  background: var(--color-surface-2) !important;
  border: 1px solid var(--color-border) !important;
  color: var(--color-foreground) !important;
  transition: all 0.3s var(--ease) !important;
}

.quiz-option:hover {
  border-color: var(--color-primary) !important;
  background: rgba(247, 181, 56, 0.05) !important;
  transform: translateX(4px);
}

.quiz-option.correct {
  background: rgba(0, 255, 136, 0.08) !important;
  border-color: var(--color-green) !important;
  color: var(--color-green) !important;
}

.quiz-option.wrong {
  background: rgba(239, 68, 68, 0.08) !important;
  border-color: #ef4444 !important;
  color: #ef4444 !important;
}

/* ===== PRACTICE ===== */
.practice-card {
  border-color: rgba(247, 181, 56, 0.2) !important;
}

.practice-answers {
  background: rgba(247, 181, 56, 0.04) !important;
  border: 1px solid rgba(247, 181, 56, 0.12) !important;
}

.reveal-btn {
  background: var(--color-primary) !important;
  color: #000 !important;
  font-weight: 700;
}

.reveal-btn:hover {
  background: var(--color-secondary) !important;
  transform: translateY(-2px);
  box-shadow: 0 4px 15px var(--color-accent-glow);
}

/* ===== INTERACTIVE ===== */
.interactive-input {
  background: var(--color-surface-2) !important;
  border: 1px solid var(--color-border) !important;
  color: var(--color-foreground) !important;
}

.interactive-input:focus {
  border-color: var(--color-primary) !important;
  box-shadow: 0 0 0 3px rgba(247, 181, 56, 0.15) !important;
}

.btn.primary {
  background: var(--color-primary) !important;
  color: #000 !important;
}

.btn.primary:hover {
  background: var(--color-secondary) !important;
  box-shadow: 0 4px 15px var(--color-accent-glow) !important;
}

/* ===== NOTES ===== */
aside.note {
  background: linear-gradient(135deg, rgba(247, 181, 56, 0.06), rgba(120, 1, 22, 0.04)) !important;
  border-left: 4px solid var(--color-primary) !important;
  color: var(--color-foreground) !important;
}

.tip-box {
  background: rgba(0, 255, 136, 0.04) !important;
  border: 1px solid rgba(0, 255, 136, 0.15) !important;
  color: var(--color-foreground) !important;
}

.info-box {
  background: rgba(59, 130, 246, 0.04) !important;
  border: 1px solid rgba(59, 130, 246, 0.15) !important;
  color: var(--color-foreground) !important;
}

/* ===== NAVIGATION ===== */
.lesson-nav .prev {
  background: var(--color-surface) !important;
  border: 1px solid var(--color-border) !important;
  color: var(--color-muted) !important;
}

.lesson-nav .prev:hover {
  border-color: var(--color-primary) !important;
  color: var(--color-primary) !important;
}

.lesson-nav .next {
  background: var(--color-primary) !important;
  color: #000 !important;
  font-weight: 700;
}

.lesson-nav .next:hover {
  background: var(--color-secondary) !important;
  transform: translateY(-2px);
  box-shadow: 0 4px 15px var(--color-accent-glow);
}

/* ===== TOC ===== */
.lesson-toc {
  background: var(--color-surface) !important;
  border: 1px solid var(--color-border) !important;
}

.toc-list { border-left-color: var(--color-border) !important; }
.toc-list a { color: var(--color-muted) !important; }
.toc-list a:hover, .toc-list a.active {
  color: var(--color-primary) !important;
  border-left-color: var(--color-primary) !important;
}

/* ===== BREADCRUMB ===== */
.breadcrumb { color: var(--color-muted) !important; }
.breadcrumb a { color: var(--color-primary) !important; }

/* ===== BADGES ===== */
.badge.primary {
  background: linear-gradient(135deg, var(--color-primary), var(--color-red)) !important;
  color: #fff !important;
  box-shadow: 0 2px 10px var(--color-accent-glow);
}

.badge.outline {
  background: rgba(247, 181, 56, 0.06) !important;
  border-color: rgba(247, 181, 56, 0.25) !important;
  color: var(--color-primary) !important;
}

/* ===== PROGRESS ===== */
.progress-fill {
  background: linear-gradient(90deg, var(--color-primary), var(--color-red)) !important;
  box-shadow: 0 0 10px var(--color-accent-glow);
}

.progress-track {
  background: var(--color-surface-2) !important;
}

/* ===== MODULE HEADER ===== */
.module-badge {
  background: rgba(247, 181, 56, 0.1) !important;
  color: var(--color-primary) !important;
  border: 1px solid rgba(247, 181, 56, 0.2);
}

.module-number {
  background: linear-gradient(135deg, var(--color-primary), var(--color-red)) !important;
  color: #fff !important;
  box-shadow: 0 4px 15px var(--color-accent-glow);
}

/* ===== LESSON FAQ ===== */
.lesson-faq .faq-item {
  background: var(--color-surface) !important;
  border: 1px solid var(--color-border) !important;
}

.lesson-faq .faq-question {
  color: var(--color-foreground) !important;
}

.lesson-faq .faq-question:hover {
  color: var(--color-primary) !important;
}

.lesson-faq .faq-answer p {
  color: var(--color-muted) !important;
}

/* ===== DIAGRAM ===== */
.diagram-container {
  background: linear-gradient(135deg, var(--color-surface), var(--color-surface-2)) !important;
  border: 1px dashed var(--color-border) !important;
}

/* ===== FOOTER ===== */
.footer {
  border-top-color: var(--color-border) !important;
  background: var(--color-surface) !important;
  color: var(--color-muted) !important;
}

/* ===== LESSON META ===== */
.lesson-time {
  background: rgba(247, 181, 56, 0.08) !important;
  color: var(--color-primary) !important;
  border: 1px solid rgba(247, 181, 56, 0.15) !important;
}

/* ===== SCROLL REVEAL ===== */
.reveal-up {
  opacity: 0;
  transform: translateY(40px);
  transition: opacity 0.8s var(--ease), transform 0.8s var(--ease);
}

.reveal-up.revealed {
  opacity: 1;
  transform: translateY(0);
}

/* ===== SCROLLBAR ===== */
::-webkit-scrollbar { width: 8px; }
::-webkit-scrollbar-track { background: var(--color-background); }
::-webkit-scrollbar-thumb {
  background: linear-gradient(180deg, var(--color-primary), var(--color-red));
  border-radius: 4px;
}
::-webkit-scrollbar-thumb:hover { background: var(--color-secondary); }

/* ===== RESPONSIVE ===== */
@media (max-width: 768px) {
  .lesson-wrapper { grid-template-columns: 1fr !important; }
  .lesson-toc { display: none; }
}

/* ===== INDEX PAGE ENHANCEMENTS ===== */

/* Glowing border on hover for all interactive elements */
.module-card:hover,
.feature-card:hover {
  border-image: linear-gradient(135deg, var(--color-primary), var(--color-red)) 1;
  border-image-slice: 1;
}

/* Animated number counter */
.hero-stat .num {
  transition: all 0.3s var(--ease);
}

.hero-stat:hover .num {
  transform: scale(1.1);
  text-shadow: 0 0 30px var(--color-accent-glow);
}

/* Feature icon glow on hover */
.feature-card:hover .feature-icon {
  animation: iconPulse 1s ease-out;
}

@keyframes iconPulse {
  0% { box-shadow: 0 0 0 0 var(--color-accent-glow); }
  100% { box-shadow: 0 0 0 15px transparent; }
}

/* Footer glow line */
footer {
  position: relative;
}

footer::before {
  content: '';
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 200px;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--color-primary), transparent);
}

/* ===== SVG COLORS UPDATE ===== */
.diagram-container svg rect[fill="#059669"],
.diagram-container svg rect[fill="#10b981"],
.diagram-container svg rect[fill="#34d399"],
.diagram-container svg rect[fill="#6ee7b7"] {
  /* Colors already updated in HTML */
}

.diagram-container {
  background: linear-gradient(135deg, var(--color-surface), var(--color-surface-2)) !important;
  border: 1px dashed var(--color-border) !important;
}

/* SVG text color fix */
.diagram-container svg text {
  fill: var(--color-foreground) !important;
}

.diagram-container svg text[fill="#0f172a"] {
  fill: var(--color-foreground) !important;
}

.diagram-container svg text[fill="#fff"] {
  fill: #fff !important;
}

/* SVG line/arrow color */
.diagram-container svg path[stroke="#475569"],
.diagram-container svg line[stroke="#475569"] {
  stroke: var(--color-muted) !important;
}

.diagram-container svg marker path[fill="#475569"] {
  fill: var(--color-muted) !important;
}

/* ===== RESULT (пример получившейся работы) ===== */
.result-box {
  border-left: 4px solid var(--color-green, #10b981) !important;
}

.result-box h3 {
  color: var(--color-green, #10b981);
  margin-top: 0;
}

.result-checklist {
  margin-top: 1rem;
  padding: .75rem 1rem;
  background: rgba(16, 185, 129, .06) !important;
  border: 1px solid rgba(16, 185, 129, .15) !important;
  border-radius: var(--radius-md);
  font-size: .9rem;
}

.result-checklist ul {
  margin: .4rem 0 0;
  padding-left: 1.25rem;
  list-style: none;
}

.result-checklist li {
  margin: .3rem 0;
}

/* ===== MISTAKES (частые ошибки) ===== */
.mistakes-box {
  border-left: 4px solid #ef4444 !important;
}

.mistakes-box h3 {
  color: #f87171;
  margin-top: 0;
}

.mistakes-box ul {
  margin: .5rem 0 0;
  padding-left: 1.1rem;
}

.mistakes-box li {
  margin: .6rem 0;
  line-height: 1.6;
}

.mistakes-box li em {
  color: var(--color-muted);
}

/* ===== TERMINAL (пример результата как вывод терминала/чат) ===== */
.terminal {
  background: #0d1117 !important;
  border: 1px solid rgba(148, 163, 184, .2) !important;
  border-radius: var(--radius-md) !important;
  overflow: hidden;
  margin: 1rem 0;
  font-family: 'JetBrains Mono', ui-monospace, Menlo, Consolas, monospace;
}

.terminal-bar {
  display: flex;
  align-items: center;
  gap: .4rem;
  padding: .5rem .8rem;
  background: rgba(148, 163, 184, .08);
  border-bottom: 1px solid rgba(148, 163, 184, .12);
  font-size: .7rem;
  color: var(--color-muted);
}

.terminal-dot {
  width: .65rem;
  height: .65rem;
  border-radius: 50%;
  display: inline-block;
}

.terminal-dot.red { background: #ff5f57; }
.terminal-dot.yellow { background: #febc2e; }
.terminal-dot.green { background: #28c840; }

.terminal-title {
  margin-left: auto;
  margin-right: auto;
  letter-spacing: .4px;
}

.terminal-body {
  padding: 1rem 1.1rem;
  font-size: .82rem;
  line-height: 1.55;
  color: #c9d1d9;
  white-space: pre-wrap;
  word-break: break-word;
}

.terminal-body .prompt {
  color: #4ade80;
  font-weight: 700;
}

.terminal-body .dim { color: #8b949e; }
.terminal-body .ok { color: #4ade80; }
.terminal-body .err { color: #f87171; }
.terminal-body .hl { color: #fbbf24; }
.terminal-body .info { color: #7dd3fc; }

/* ===== CHAT (диалог бота — для "пример результата") ===== */
.chat-win {
  background: #0d1117 !important;
  border: 1px solid rgba(148, 163, 184, .2) !important;
  border-radius: var(--radius-md) !important;
  overflow: hidden;
  margin: 1rem 0;
}

.chat-body {
  padding: 1rem 1.1rem;
  display: flex;
  flex-direction: column;
  gap: .7rem;
}

.chat-msg {
  max-width: 88%;
  padding: .6rem .8rem;
  border-radius: .75rem;
  font-size: .85rem;
  line-height: 1.5;
  white-space: pre-wrap;
  word-break: break-word;
}

.chat-msg.user {
  align-self: flex-end;
  background: #1e3a5f;
  color: #e2e8f0;
  border-bottom-right-radius: .2rem;
}

.chat-msg.bot {
  align-self: flex-start;
  background: #161b22;
  color: #c9d1d9;
  border: 1px solid rgba(148, 163, 184, .15);
  border-bottom-left-radius: .2rem;
}

.chat-msg .ok { color: #4ade80; }
.chat-msg .hl { color: #fbbf24; }
.chat-msg .info { color: #7dd3fc; }