/* Telegram Mini App Design System */

:root {
  /* Telegram theme colors */
  --tg-color-bg: var(--tg-theme-bg-color, #ffffff);
  --tg-color-secondary-bg: var(--tg-theme-secondary-bg-color, #f1f1f1);
  --tg-color-section-bg: var(--tg-theme-section-bg-color, #ffffff);
  --tg-color-text: var(--tg-theme-text-color, #000000);
  --tg-color-hint: var(--tg-theme-hint-color, #999999);
  --tg-color-link: var(--tg-theme-link-color, #007aff);
  --tg-color-button: var(--tg-theme-button-color, #007aff);
  --tg-color-button-text: var(--tg-theme-button-text-color, #ffffff);
  --tg-color-destructive: var(--tg-theme-destructive-text-color, #ff3b30);
  
  /* Telegram dimensions */
  --tg-border-radius: 12px;
  --tg-border-radius-small: 8px;
  --tg-spacing-xs: 4px;
  --tg-spacing-sm: 8px;
  --tg-spacing-md: 12px;
  --tg-spacing-lg: 16px;
  --tg-spacing-xl: 20px;
  --tg-spacing-xxl: 24px;
  
  /* Typography */
  --tg-font-size-xs: 12px;
  --tg-font-size-sm: 14px;
  --tg-font-size-md: 16px;
  --tg-font-size-lg: 17px;
  --tg-font-size-xl: 20px;
  --tg-font-size-xxl: 28px;
  
  --tg-line-height-tight: 1.2;
  --tg-line-height-normal: 1.4;
  --tg-line-height-relaxed: 1.6;
}

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

html, body {
  height: 100%;
  font-family: -apple-system, BlinkMacSystemFont, 'SF Pro Display', 'SF Pro Text', system-ui, Helvetica, Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  background: var(--tg-color-bg);
  color: var(--tg-color-text);
  font-size: var(--tg-font-size-md);
  line-height: var(--tg-line-height-normal);
  overflow-x: hidden;
}

/* Root container */
.tg-root {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* Content area */
.tg-content {
  flex: 1;
  padding: var(--tg-spacing-lg);
  padding-bottom: 100px;
  display: flex;
  flex-direction: column;
  gap: var(--tg-spacing-xl);
}

/* Form components */
.tg-form {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  padding: var(--tg-spacing-lg);
  background: var(--tg-color-bg);
  border-top: 1px solid var(--tg-color-secondary-bg);
  z-index: 100;
}

.tg-input-wrapper {
  position: relative;
}

.tg-input {
  width: 100%;
  height: 48px;
  padding: 0 var(--tg-spacing-lg);
  background: var(--tg-color-section-bg);
  border: 2px solid var(--tg-color-secondary-bg);
  border-radius: var(--tg-border-radius);
  font-size: var(--tg-font-size-lg);
  color: var(--tg-color-text);
  transition: all 0.2s ease;
  outline: none;
}

.tg-input::placeholder {
  color: var(--tg-color-hint);
}

.tg-input:focus {
  border-color: var(--tg-color-button);
  background: var(--tg-color-bg);
}

/* Button components */
.tg-button {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--tg-spacing-sm);
  border: none;
  border-radius: var(--tg-border-radius);
  font-family: inherit;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s ease;
  outline: none;
  user-select: none;
  -webkit-tap-highlight-color: transparent;
}

.tg-button--primary {
  background: var(--tg-color-button);
  color: var(--tg-color-button-text);
}

.tg-button--large {
  height: 48px;
  padding: 0 var(--tg-spacing-xl);
  font-size: var(--tg-font-size-lg);
}

.tg-button:hover:not(:disabled) {
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(0, 122, 255, 0.3);
}

.tg-button:active:not(:disabled) {
  transform: translateY(0);
}

.tg-button:disabled {
  opacity: 0.4;
  cursor: not-allowed;
  transform: none !important;
  box-shadow: none !important;
}

.tg-button__text {
  display: flex;
  align-items: center;
  gap: var(--tg-spacing-xs);
}

/* Placeholder component */
.tg-placeholder {
  text-align: center;
  padding: var(--tg-spacing-xxl) var(--tg-spacing-lg);
  max-width: 300px;
  margin: 0 auto;
}

.tg-placeholder__icon {
  font-size: 48px;
  margin-bottom: var(--tg-spacing-lg);
  opacity: 0.6;
}

.tg-placeholder__title {
  font-size: var(--tg-font-size-xl);
  font-weight: 600;
  color: var(--tg-color-text);
  margin-bottom: var(--tg-spacing-sm);
}

.tg-placeholder__description {
  font-size: var(--tg-font-size-sm);
  color: var(--tg-color-hint);
  line-height: var(--tg-line-height-relaxed);
}

.tg-placeholder--secondary {
  opacity: 0.8;
}

/* Spinner component */
.tg-spinner {
  position: fixed;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  text-align: center;
  padding: var(--tg-spacing-xxl);
  display: none;
  z-index: 10;
}

.tg-spinner.tg-spinner--visible {
  display: block;
}

.tg-spinner__icon {
  width: 32px;
  height: 32px;
  border: 2px solid var(--tg-color-secondary-bg);
  border-top: 2px solid var(--tg-color-button);
  border-radius: 50%;
  margin: 0 auto var(--tg-spacing-lg);
  animation: tg-spin 1s linear infinite;
}

.tg-spinner__text {
  font-size: var(--tg-font-size-sm);
  color: var(--tg-color-hint);
}

@keyframes tg-spin {
  0% { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}

/* List component */
.tg-list {
  display: none;
  flex-direction: column;
  gap: var(--tg-spacing-xs);
}

.tg-list.tg-list--visible {
  display: flex;
}

.tg-list-item {
  background: var(--tg-color-section-bg);
  border-radius: var(--tg-border-radius);
  overflow: hidden;
  transition: all 0.2s ease;
  cursor: pointer;
  user-select: none;
  -webkit-tap-highlight-color: transparent;
  position: relative;
}

/* Hover effects for desktop */
@media (hover: hover) and (pointer: fine) {
  .tg-list-item:hover {
    background: var(--tg-color-secondary-bg);
    transform: translateY(-1px);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
  }
}

/* Touch feedback for mobile - brief highlight only */
.tg-list-item:active {
  transform: translateY(0);
  background: var(--tg-color-secondary-bg);
}

/* Prevent sticky hover states on touch devices */
@media (hover: none) {
  .tg-list-item:hover {
    background: var(--tg-color-section-bg);
    transform: none;
    box-shadow: none;
  }
}

.tg-list-item__content {
  display: flex;
  align-items: center;
  gap: var(--tg-spacing-md);
  padding: var(--tg-spacing-md);
}

.tg-list-item__media {
  position: relative;
  flex-shrink: 0;
}

.tg-list-item__thumbnail {
  width: 80px;
  height: 60px;
  object-fit: cover;
  border-radius: var(--tg-border-radius-small);
  background: var(--tg-color-secondary-bg);
  image-rendering: -webkit-optimize-contrast;
  image-rendering: crisp-edges;
  image-rendering: optimizeQuality;
}

.tg-list-item__duration {
  position: absolute;
  bottom: 2px;
  right: 2px;
  background: rgba(0, 0, 0, 0.8);
  color: white;
  font-size: var(--tg-font-size-xs);
  padding: 2px 4px;
  border-radius: 4px;
  font-weight: 500;
}

.tg-list-item__info {
  flex: 1;
  min-width: 0;
}

.tg-list-item__title {
  font-size: var(--tg-font-size-md);
  font-weight: 500;
  color: var(--tg-color-text);
  line-height: var(--tg-line-height-tight);
  margin-bottom: var(--tg-spacing-xs);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.tg-list-item__subtitle {
  font-size: var(--tg-font-size-sm);
  color: var(--tg-color-hint);
  line-height: var(--tg-line-height-tight);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

/* Converting state */
.tg-list-item--converting {
  opacity: 0.6;
  pointer-events: none;
}

.tg-list-item--converting::after {
  content: "";
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 20px;
  height: 20px;
  border: 2px solid var(--tg-color-secondary-bg);
  border-top: 2px solid var(--tg-color-button);
  border-radius: 50%;
  animation: tg-spin 1s linear infinite;
}

/* Status message */
.tg-status-message {
  position: fixed;
  top: 20px;
  left: var(--tg-spacing-lg);
  right: var(--tg-spacing-lg);
  z-index: 1000;
  padding: var(--tg-spacing-md) var(--tg-spacing-lg);
  border-radius: var(--tg-border-radius);
  font-size: var(--tg-font-size-sm);
  font-weight: 500;
  animation: tg-slide-down 0.3s ease-out;
  display: flex;
  align-items: center;
  gap: var(--tg-spacing-sm);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.25), 0 4px 12px rgba(0, 0, 0, 0.15);
}

.tg-status-message--success {
  background: #34c759;
  border: 1px solid #2aa854;
  color: #ffffff;
}

.tg-status-message--error {
  background: #ff3b30;
  border: 1px solid #d70015;
  color: #ffffff;
}

.tg-status-message--info {
  background: #007aff;
  border: 1px solid #0056cc;
  color: #ffffff;
}

@keyframes tg-slide-down {
  from {
    opacity: 0;
    transform: translateY(-20px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Utility classes */
.tg-hidden {
  display: none !important;
}

.tg-visible {
  display: block !important;
}

/* Responsive design */
@media (max-width: 768px) and (min-width: 481px) {
  .tg-list-item__thumbnail {
    width: 100px;
    height: 100px;
  }
  
  .tg-list-item__title {
    font-size: var(--tg-font-size-sm);
  }
}
@media (max-width: 480px) {
  .tg-content {
    padding: var(--tg-spacing-md);
  }
  
  .tg-navigation {
    padding: var(--tg-spacing-md);
  }
  
  .tg-list {
    grid-template-columns: 1fr;
    gap: var(--tg-spacing-sm);
  }
  
  .tg-list-item__content {
    flex-direction: row;
    text-align: left;
    padding: var(--tg-spacing-sm);
  }
  
  .tg-list-item__media {
    margin-bottom: 0;
    margin-right: var(--tg-spacing-sm);
    flex-shrink: 0;
  }
  
  .tg-list-item__thumbnail {
    width: 60px;
    height: 60px;
  }
  
  .tg-list-item__info {
    flex: 1;
    min-width: 0;
  }
  
  .tg-list-item__title {
    text-align: left;
    font-size: var(--tg-font-size-sm);
    -webkit-line-clamp: 1;
  }
  
  .tg-list-item__subtitle {
    text-align: left;
  }
}

/* Dark theme support */
@media (prefers-color-scheme: dark) {
  :root {
    --tg-color-bg: var(--tg-theme-bg-color, #000000);
    --tg-color-secondary-bg: var(--tg-theme-secondary-bg-color, #1c1c1e);
    --tg-color-section-bg: var(--tg-theme-section-bg-color, #1c1c1e);
    --tg-color-text: var(--tg-theme-text-color, #ffffff);
    --tg-color-hint: var(--tg-theme-hint-color, #8e8e93);
  }
}