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

:root {
  --kvibe-surface: #191b24;
  --kvibe-grid-dot: rgba(50, 52, 62, 0.45);
  --kvibe-accent: #bdf077;
  --kvibe-purple: #9a56c0;
  --kvibe-blue: #339af0;
  --kvibe-pink: #f06595;
  --kvibe-orange: #ff922b;
  --kvibe-green: #51cf66;
  --kvibe-red: #ff6b6b;
  --slide-transition: 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: 'SN Pro', system-ui, -apple-system, sans-serif;
  color: #e8eaf0;
  background-color: var(--kvibe-surface);
  background-image: radial-gradient(
    var(--kvibe-grid-dot) 1px,
    var(--kvibe-surface) 1px
  );
  background-size: 20px 20px;
  overflow: hidden;
}

.presentation {
  position: relative;
  width: 100vw;
  height: 100vh;
  overflow: hidden;
}

/* Прогресс-бар */
.progress-bar {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 4px;
  background: rgba(255, 255, 255, 0.1);
  z-index: 100;
}

.progress-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--kvibe-accent), var(--kvibe-purple));
  transition: width var(--slide-transition);
  width: 5%;
}

/* Счётчик слайдов */
.slide-counter {
  position: fixed;
  top: 16px;
  right: 20px;
  font-family: 'JetBrains Mono', monospace;
  font-size: 14px;
  color: rgba(255, 255, 255, 0.5);
  z-index: 100;
}

/* Кнопки навигации */
.nav-btn {
  position: fixed;
  top: 50%;
  transform: translateY(-50%);
  width: 50px;
  height: 50px;
  border: none;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.1);
  color: white;
  font-size: 24px;
  cursor: pointer;
  z-index: 100;
  transition: all 0.3s ease;
  backdrop-filter: blur(10px);
}

.nav-btn:hover {
  background: rgba(255, 255, 255, 0.2);
  transform: translateY(-50%) scale(1.1);
}

.nav-btn:active {
  transform: translateY(-50%) scale(0.95);
}

.nav-btn--prev {
  left: 20px;
}

.nav-btn--next {
  right: 20px;
}

.nav-btn:disabled {
  opacity: 0.3;
  cursor: not-allowed;
}

/* Подсказка клавиатуры */
.keyboard-hint {
  position: fixed;
  bottom: 20px;
  left: 50%;
  transform: translateX(-50%);
  font-family: 'JetBrains Mono', monospace;
  font-size: 12px;
  color: rgba(255, 255, 255, 0.3);
  z-index: 100;
}

.keyboard-hint span {
  background: rgba(255, 255, 255, 0.1);
  padding: 2px 8px;
  border-radius: 4px;
  margin: 0 2px;
}

/* Контейнер слайдов */
.slides-container {
  position: relative;
  width: 100%;
  height: 100%;
}

/* Слайд */
.slide {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 60px 80px;
  opacity: 0;
  visibility: hidden;
  transform: translateX(50px);
  transition: all var(--slide-transition);
}

.slide.active {
  opacity: 1;
  visibility: visible;
  transform: translateX(0);
}

.slide.prev {
  transform: translateX(-50px);
}

.slide-content {
  max-width: 900px;
  width: 100%;
  text-align: center;
}

/* Слайд с градиентом */
.slide--gradient {
  background: linear-gradient(135deg, rgba(154, 86, 192, 0.1) 0%, rgba(51, 154, 240, 0.1) 100%);
}

.slide--final {
  background: linear-gradient(135deg, rgba(189, 240, 119, 0.1) 0%, rgba(154, 86, 192, 0.1) 100%);
}

.slide--alert {
  background: linear-gradient(135deg, rgba(255, 107, 107, 0.08) 0%, rgba(255, 146, 43, 0.08) 100%);
}

/* Титульный слайд */
.slide--title .slide-content {
  display: flex;
  flex-direction: column;
  align-items: center;
}

.emoji-big {
  font-size: 80px;
  margin-bottom: 20px;
  animation: bounce 2s ease-in-out infinite;
}

@keyframes bounce {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-10px); }
}

.main-title {
  font-size: 64px;
  font-weight: 800;
  background: linear-gradient(135deg, var(--kvibe-accent), var(--kvibe-purple));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 10px;
}

.subtitle {
  font-size: 26px;
  font-weight: 400;
  color: #b8b8c8;
  margin-bottom: 30px;
}

.decorative-line {
  width: 100px;
  height: 4px;
  background: linear-gradient(90deg, var(--kvibe-accent), var(--kvibe-purple));
  border-radius: 2px;
  margin-bottom: 20px;
}

/* Заголовок слайда */
.slide-header {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 15px;
  margin-bottom: 40px;
}

.slide-header .emoji {
  font-size: 40px;
}

.slide-header h2 {
  font-size: 36px;
  font-weight: 700;
  color: #fff;
}

/* Список целей */
.goals-list {
  list-style: none;
  text-align: left;
  display: inline-block;
}

.goal-item {
  display: flex;
  align-items: center;
  gap: 15px;
  padding: 15px 25px;
  margin-bottom: 12px;
  background: rgba(255, 255, 255, 0.05);
  border-radius: 12px;
  font-size: 18px;
  opacity: 0;
  transform: translateX(-20px);
  animation: slideIn 0.5s ease forwards;
  animation-delay: var(--delay);
}

.slide.active .goal-item {
  opacity: 1;
  transform: translateX(0);
}

@keyframes slideIn {
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

.goal-icon {
  font-size: 24px;
}

/* Карточки квиза */
.quiz-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.quiz-card {
  background: rgba(255, 255, 255, 0.05);
  border-radius: 16px;
  padding: 25px;
  text-align: center;
  transition: all 0.3s ease;
  border: 2px solid transparent;
}

.quiz-card:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: var(--kvibe-accent);
  transform: translateY(-5px);
}

.quiz-icon {
  font-size: 40px;
  margin-bottom: 15px;
}

.quiz-card p {
  font-size: 16px;
  color: #b8b8c8;
}

/* Блок определения */
.definition-box {
  background: rgba(51, 154, 240, 0.1);
  border-radius: 16px;
  padding: 30px;
  margin-bottom: 30px;
  display: flex;
  align-items: center;
  gap: 20px;
  text-align: left;
}

.definition-icon {
  font-size: 48px;
}

.definition-text {
  font-size: 20px;
  line-height: 1.5;
}

/* Шаги */
.steps-visual {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 20px;
  margin-bottom: 30px;
  flex-wrap: wrap;
}

.step-card {
  background: rgba(255, 255, 255, 0.05);
  border-radius: 16px;
  padding: 25px 30px;
  text-align: center;
  min-width: 160px;
}

.step-number {
  font-family: 'JetBrains Mono', monospace;
  font-size: 24px;
  font-weight: 600;
  color: var(--kvibe-accent);
  margin-bottom: 10px;
}

.step-icon {
  font-size: 40px;
  margin-bottom: 10px;
}

.step-card p {
  font-size: 14px;
  color: #b8b8c8;
}

.step-arrow {
  font-size: 28px;
  color: var(--kvibe-accent);
}

/* Подсказки и предупреждения */
.tip-box {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  background: rgba(189, 240, 119, 0.15);
  border-left: 4px solid var(--kvibe-accent);
  padding: 15px 20px;
  border-radius: 0 12px 12px 0;
  font-size: 16px;
}

.tip-icon {
  font-size: 20px;
}

.highlight-box {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  background: rgba(51, 154, 240, 0.15);
  border-left: 4px solid var(--kvibe-blue);
  padding: 15px 20px;
  border-radius: 0 12px 12px 0;
  font-size: 18px;
  margin-top: 20px;
}

.alert-box {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  background: rgba(255, 107, 107, 0.15);
  border-left: 4px solid var(--kvibe-red);
  padding: 15px 20px;
  border-radius: 0 12px 12px 0;
  font-size: 18px;
  margin-top: 20px;
}

.use-case-box {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  background: rgba(255, 255, 255, 0.05);
  padding: 15px 25px;
  border-radius: 12px;
  font-size: 16px;
  margin-top: 20px;
}

.use-icon {
  font-size: 20px;
}

/* Описание */
.description {
  font-size: 20px;
  color: #b8b8c8;
  margin-bottom: 25px;
}

/* Сравнение хороший/плохой слайд */
.compare-slides {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 30px;
  align-items: start;
}

.compare-side {
  text-align: center;
}

.compare-label {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 15px;
}

.compare-label--bad {
  color: var(--kvibe-red);
}

.compare-label--good {
  color: var(--kvibe-green);
}

/* Превью слайда */
.slide-preview {
  margin-bottom: 25px;
}

.preview-slide {
  background: #fff;
  border-radius: 12px;
  padding: 40px;
  max-width: 500px;
  margin: 0 auto;
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.3);
  text-align: left;
  min-height: 200px;
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.preview-slide--title {
  text-align: center;
  justify-content: center;
  align-items: center;
}

.preview-slide--green {
  border-top: 4px solid var(--kvibe-green);
}

.preview-slide--purple {
  border-top: 4px solid var(--kvibe-purple);
}

.preview-slide--final {
  text-align: center;
  justify-content: center;
  align-items: center;
  background: linear-gradient(135deg, #191b24, #2a2d38);
  color: #fff;
}

.preview-slide--bad {
  border: 2px solid var(--kvibe-red);
  padding: 25px;
}

.preview-slide--good {
  border: 2px solid var(--kvibe-green);
  padding: 25px;
}

.preview-title {
  font-size: 22px;
  font-weight: 700;
  color: var(--kvibe-blue);
  margin-bottom: 15px;
}

.preview-heading {
  font-size: 20px;
  font-weight: 700;
  color: #1a1a1a;
  margin-bottom: 15px;
}

.preview-heading-small {
  font-size: 16px;
  font-weight: 700;
  color: #1a1a1a;
  margin-bottom: 10px;
}

.preview-text-tiny {
  font-size: 10px;
  color: #666;
  line-height: 1.4;
}

.preview-text-small {
  font-size: 12px;
  color: #444;
  line-height: 1.5;
  margin-bottom: 6px;
}

.preview-list {
  list-style: none;
  padding: 0;
}

.preview-list li {
  font-size: 14px;
  color: #444;
  padding: 6px 0;
  padding-left: 20px;
  position: relative;
}

.preview-list li::before {
  content: "•";
  position: absolute;
  left: 0;
  color: var(--kvibe-blue);
}

/* Навигация — демо */
.nav-demo {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 30px;
  margin-bottom: 20px;
}

.nav-pane {
  background: #2a2d38;
  border-radius: 12px;
  padding: 20px;
  min-width: 250px;
  text-align: left;
}

.nav-pane-title {
  font-size: 16px;
  font-weight: 700;
  color: #fff;
  margin-bottom: 15px;
  padding-bottom: 10px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.nav-item {
  font-size: 14px;
  color: #b8b8c8;
  padding: 8px 12px;
  border-radius: 6px;
  margin-bottom: 4px;
  transition: background 0.2s;
}

.nav-item--active {
  background: rgba(189, 240, 119, 0.15);
  color: var(--kvibe-accent);
  font-weight: 600;
}

.nav-arrow {
  font-size: 32px;
  color: var(--kvibe-accent);
}

.nav-explanation {
  text-align: left;
  max-width: 300px;
}

.nav-explanation p {
  font-size: 16px;
  color: #b8b8c8;
  margin-bottom: 10px;
}

/* Настройки — списки */
.settings-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-bottom: 25px;
  text-align: left;
}

.setting-item {
  display: flex;
  align-items: center;
  gap: 15px;
  background: rgba(255, 255, 255, 0.05);
  border-radius: 12px;
  padding: 15px 25px;
  opacity: 0;
  animation: slideIn 0.5s ease forwards;
  animation-delay: var(--delay);
}

.slide.active .setting-item {
  opacity: 1;
  transform: translateX(0);
}

.setting-icon {
  font-size: 24px;
  min-width: 35px;
  text-align: center;
}

.setting-name {
  font-size: 16px;
  font-weight: 700;
  color: #fff;
  min-width: 200px;
}

.setting-desc {
  font-size: 14px;
  color: #b8b8c8;
}

/* Задания — карточки */
.task-card {
  background: rgba(255, 255, 255, 0.05);
  border-radius: 16px;
  padding: 30px;
  text-align: left;
  max-width: 700px;
  margin: 0 auto;
  border: 2px solid rgba(255, 255, 255, 0.08);
}

.task-badge {
  display: inline-block;
  background: var(--kvibe-purple);
  color: #fff;
  font-family: 'JetBrains Mono', monospace;
  font-size: 13px;
  font-weight: 600;
  padding: 4px 12px;
  border-radius: 20px;
  margin-bottom: 15px;
}

.task-title {
  font-size: 22px;
  font-weight: 700;
  color: #fff;
  margin-bottom: 15px;
}

.task-body {
  font-size: 16px;
  color: #b8b8c8;
  line-height: 1.6;
}

.task-body ul {
  list-style: none;
  padding: 0;
  margin-top: 10px;
}

.task-body ul li {
  padding: 6px 0;
  padding-left: 22px;
  position: relative;
}

.task-body ul li::before {
  content: "▸";
  position: absolute;
  left: 0;
  color: var(--kvibe-accent);
}

.task-folder {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(255, 146, 43, 0.15);
  border: 1px solid rgba(255, 146, 43, 0.3);
  padding: 8px 16px;
  border-radius: 8px;
  font-family: 'JetBrains Mono', monospace;
  font-size: 14px;
  color: var(--kvibe-orange);
  margin-top: 15px;
}

/* Сетка тем */
.topics-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 15px;
  max-width: 700px;
  margin: 0 auto;
}

.topic-chip {
  background: rgba(255, 255, 255, 0.05);
  border: 2px solid rgba(255, 255, 255, 0.1);
  border-radius: 12px;
  padding: 16px 12px;
  text-align: center;
  font-size: 14px;
  color: #b8b8c8;
  transition: all 0.3s ease;
  cursor: default;
}

.topic-chip:hover {
  background: rgba(189, 240, 119, 0.1);
  border-color: var(--kvibe-accent);
  transform: translateY(-3px);
}

.topic-emoji {
  font-size: 28px;
  margin-bottom: 6px;
  display: block;
}

/* Таблица — демо */
.table-demo {
  margin-bottom: 25px;
}

.preview-slide--table {
  padding: 20px;
  overflow-x: auto;
}

.demo-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
}

.demo-table th {
  background: var(--kvibe-blue);
  color: #fff;
  padding: 10px 16px;
  text-align: left;
  font-weight: 700;
}

.demo-table td {
  padding: 10px 16px;
  color: #333;
  border-bottom: 1px solid #eee;
}

.demo-table tbody tr:hover {
  background: rgba(51, 154, 240, 0.05);
}

/* Поля — визуальная демонстрация */
.margin-demo {
  display: flex;
  justify-content: center;
}

.page-with-margins {
  position: relative;
  width: 300px;
  height: 380px;
  background: #fff;
  border-radius: 8px;
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.3);
}

.margin-label {
  position: absolute;
  font-family: 'JetBrains Mono', monospace;
  font-size: 12px;
  font-weight: 600;
  color: var(--kvibe-red);
  background: rgba(255, 255, 255, 0.9);
  padding: 2px 6px;
  border-radius: 4px;
}

.margin-label--top {
  top: 5px;
  left: 50%;
  transform: translateX(-50%);
}

.margin-label--bottom {
  bottom: 5px;
  left: 50%;
  transform: translateX(-50%);
}

.margin-label--left {
  left: 5px;
  top: 50%;
  transform: translateY(-50%);
}

.margin-label--right {
  right: 5px;
  top: 50%;
  transform: translateY(-50%);
}

.page-body {
  position: absolute;
  top: 35px;
  left: 60px;
  right: 30px;
  bottom: 35px;
  display: flex;
  flex-direction: column;
  justify-content: flex-start;
  gap: 14px;
  padding: 15px;
}

.page-line {
  height: 8px;
  background: #e0e0e0;
  border-radius: 4px;
}

.page-line--short {
  width: 60%;
}

/* Превью презентации */
.pres-slides-row {
  display: flex;
  gap: 15px;
  justify-content: center;
  flex-wrap: wrap;
}

.pres-slide-mini {
  width: 180px;
  height: 120px;
  border-radius: 8px;
  padding: 12px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  text-align: center;
  font-size: 11px;
  color: #333;
  background: #fff;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
  transition: transform 0.3s ease;
}

.pres-slide-mini:hover {
  transform: scale(1.05);
}

.pres-slide-mini--title {
  background: linear-gradient(135deg, #f0f9e8, #e8f0f9);
}

.pres-slide-mini--content {
  border-top: 3px solid var(--kvibe-blue);
}

.pres-slide-mini--facts {
  border-top: 3px solid var(--kvibe-purple);
}

.pres-slide-mini--thanks {
  background: linear-gradient(135deg, #191b24, #2a2d38);
  color: #fff;
}

.pres-slide-num {
  font-family: 'JetBrains Mono', monospace;
  font-size: 9px;
  opacity: 0.6;
  margin-bottom: 4px;
}

.pres-slide-label {
  font-weight: 700;
  font-size: 12px;
}

/* Практика */
.practice-theme {
  margin-bottom: 30px;
}

.theme-label {
  font-size: 16px;
  color: var(--kvibe-accent);
  margin-bottom: 10px;
  font-family: 'JetBrains Mono', monospace;
}

.theme-title {
  font-size: 36px;
  font-weight: 800;
  background: linear-gradient(135deg, var(--kvibe-accent), var(--kvibe-blue));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.practice-checklist {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  text-align: left;
  max-width: 600px;
  margin: 0 auto;
}

.practice-item {
  display: flex;
  align-items: center;
  gap: 12px;
  background: rgba(255, 255, 255, 0.05);
  border-radius: 10px;
  padding: 12px 18px;
  font-size: 16px;
  opacity: 0;
  animation: slideIn 0.5s ease forwards;
  animation-delay: var(--delay);
}

.slide.active .practice-item {
  opacity: 1;
  transform: translateX(0);
}

.practice-check {
  font-size: 20px;
}

/* ДЗ */
.homework-list {
  display: flex;
  flex-direction: column;
  gap: 15px;
  margin-bottom: 30px;
  max-width: 500px;
  margin-left: auto;
  margin-right: auto;
}

.homework-item {
  display: flex;
  align-items: center;
  gap: 15px;
  background: rgba(255, 255, 255, 0.05);
  padding: 15px 25px;
  border-radius: 12px;
  font-size: 18px;
  text-align: left;
  opacity: 0;
  animation: slideIn 0.5s ease forwards;
  animation-delay: var(--delay);
}

.slide.active .homework-item {
  opacity: 1;
  transform: translateX(0);
}

.hw-num {
  font-family: 'JetBrains Mono', monospace;
  font-weight: 700;
  color: var(--kvibe-accent);
  min-width: 30px;
}

.final-emoji {
  font-size: 80px;
  margin: 30px 0 10px;
  animation: pulse 1.5s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { transform: scale(1); }
  50% { transform: scale(1.1); }
}

.final-text {
  font-size: 32px;
  font-weight: 700;
  color: var(--kvibe-accent);
}

.tips-row {
  display: flex;
  justify-content: center;
  gap: 20px;
}

.tip-box--small {
  font-size: 14px;
  padding: 12px 18px;
}

/* Итоги — чеклист */
.graduation-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  max-width: 600px;
  margin: 0 auto;
}

.grad-item {
  display: flex;
  align-items: center;
  gap: 12px;
  background: rgba(255, 255, 255, 0.05);
  border-radius: 10px;
  padding: 12px 18px;
  font-size: 16px;
  opacity: 0;
  transform: translateX(-20px);
  animation: slideIn 0.5s ease forwards;
  animation-delay: var(--delay);
}

.slide.active .grad-item {
  opacity: 1;
  transform: translateX(0);
}

.grad-check {
  font-size: 20px;
}

/* Адаптивность */
@media (max-width: 768px) {
  .slide {
    padding: 60px 20px;
  }

  .slide-header h2 {
    font-size: 24px;
  }

  .main-title {
    font-size: 40px;
  }

  .subtitle {
    font-size: 18px;
  }

  .quiz-grid {
    grid-template-columns: 1fr 1fr;
  }

  .steps-visual {
    flex-direction: column;
  }

  .step-arrow {
    transform: rotate(90deg);
  }

  .compare-slides {
    grid-template-columns: 1fr;
  }

  .topics-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .nav-demo {
    flex-direction: column;
  }

  .nav-arrow {
    transform: rotate(90deg);
  }

  .practice-checklist {
    grid-template-columns: 1fr;
  }

  .setting-name {
    min-width: auto;
  }

  .nav-btn {
    width: 40px;
    height: 40px;
    font-size: 18px;
  }

  .nav-btn--prev {
    left: 10px;
  }

  .nav-btn--next {
    right: 10px;
  }

  .pres-slides-row {
    gap: 10px;
  }

  .pres-slide-mini {
    width: 140px;
    height: 95px;
    font-size: 9px;
  }

  .graduation-grid {
    grid-template-columns: 1fr;
  }
}