/* ========================================
   ui-preview.css — UI Preview Styles
   ======================================== */

/* ========== Container ========== */
.header__container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 40px;
}

.ui-preview__container {
  margin: 0 auto;
  padding: 0 20px;
  width: 100%;
}

/* ========== Header ========== */
.header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: var(--header-height);
  background: rgba(10, 10, 10, 0.8);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  z-index: 1000;
  border-bottom: 1px solid var(--border);
  transition: all var(--transition-base);
}

.header__container {
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.header__logo {
  display: inline-flex;
  align-items: center;
  gap: 0;
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: -0.5px;
  color: var(--text-primary);
}

.header__logo-img {
  width: 32px;
  height: 32px;
  margin: 0;
  object-fit: contain;
}

.header__nav {
  display: flex;
  gap: 40px;
}

.header__link {
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--text-secondary);
  transition: color var(--transition-fast);
  position: relative;
}

.header__link::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--accent);
  transition: width var(--transition-base);
}

.header__link:hover {
  color: var(--text-primary);
}

.header__link:hover::after {
  width: 100%;
}

.header__link--active {
  color: var(--accent);
}

.header__link--active::after {
  width: 100%;
}

.header__menu-toggle {
  display: none;
  flex-direction: column;
  gap: 6px;
  width: 28px;
  cursor: pointer;
}

.header__menu-toggle span {
  width: 100%;
  height: 2px;
  background: var(--text-primary);
  transition: all var(--transition-base);
}

.header__menu-toggle.active span:nth-child(1) {
  transform: rotate(45deg) translate(6px, 6px);
}

.header__menu-toggle.active span:nth-child(2) {
  opacity: 0;
}

.header__menu-toggle.active span:nth-child(3) {
  transform: rotate(-45deg) translate(6px, -6px);
}

/* ========== Mobile Menu ========== */
.mobile-menu {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100vh;
  background: var(--bg-primary);
  z-index: 999;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-base);
}

.mobile-menu.active {
  opacity: 1;
  visibility: visible;
}

.mobile-menu__nav {
  display: flex;
  flex-direction: column;
  gap: 32px;
  text-align: center;
}

.mobile-menu__link {
  font-size: 1.5rem;
  font-weight: 600;
  color: var(--text-primary);
  transition: color var(--transition-fast);
}

.mobile-menu__link:hover {
  color: var(--accent);
}

/* ========== Page Layout ========== */
.ui-preview {
  min-height: 100vh;
  padding: calc(var(--header-height) + 120px) 0 120px;
  background: var(--bg-primary);
}

.ui-preview__container {
  /* max-width: 1000px; */
  margin: 0 auto;
  padding: 0 80px;
}

/* ========== Page Header ========== */
.ui-preview__header {
  margin-bottom: 150px;
  text-align: center;
}

.ui-preview__title {
  font-size: 3rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 16px;
  letter-spacing: -0.02em;
}

.ui-preview__subtitle {
  font-size: 1.125rem;
  color: var(--text-secondary);
  font-weight: 400;
}

/* ========== Color Controls ========== */
.color-controls {
  display: flex;
  gap: 40px;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
}

.color-control {
  display: flex;
  flex-direction: row;
  align-items: center;
  gap: 12px;
  min-width: auto;
}

.color-control__label {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  white-space: nowrap;
}

.color-control__input {
  display: flex;
  align-items: center;
  gap: 12px;
  background: var(--bg-tertiary);
  padding: 12px 16px;
  border-radius: 12px;
  border: 1px solid var(--border);
  transition: all var(--transition-base);
}

.color-control__input:hover {
  border-color: var(--border-hover);
}

.color-control__input input[type="color"] {
  width: 40px;
  height: 40px;
  border: none;
  border-radius: 8px;
  cursor: pointer;
  background: transparent;
}

.color-control__input span {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-primary);
  font-family: 'Monaco', 'Consolas', monospace;
}

/* ========== Preview Area ========== */
.preview-area {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  width: 100%;
}

.preview-column {
  display: flex;
  flex-direction: column;
  gap: 60px;
  align-items: center;
}

.preview-section {
  background: var(--bg-secondary);
  border-radius: 24px;
  padding: 60px;
  width: 100%;
  max-width: 700px;
}

.preview-section__title {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: 32px;
}

.preview-section__content {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

/* Preview Buttons */
.preview-btn {
  padding: 20px 48px;
  font-size: 1.125rem;
  font-weight: 600;
  border-radius: 12px;
  cursor: pointer;
  transition: all var(--transition-base);
}

.preview-btn--filled {
  background: var(--button-color, var(--accent));
  color: var(--button-text-color, #FFFFFF);
  border: none;
}

.preview-btn--filled:hover {
  opacity: 0.9;
  transform: translateY(-2px);
}

.preview-btn--outline {
  background: transparent;
  color: var(--button-color, var(--accent));
  border: 2px solid var(--button-color, var(--accent));
}

.preview-btn--outline:hover {
  background: var(--button-color, var(--accent));
  color: var(--button-text-color, #FFFFFF);
}

/* Preview Navigation */
.preview-nav {
  display: flex;
  gap: 12px;
  background: var(--bg-tertiary);
  padding: 12px;
  border-radius: 12px;
}

.preview-nav__link {
  padding: 16px 32px;
  font-size: 1rem;
  font-weight: 500;
  color: var(--button-color, var(--accent));
  border-radius: 8px;
  transition: all var(--transition-base);
}

.preview-nav__link:hover {
  background: var(--button-color, var(--accent));
  color: var(--button-text-color, #FFFFFF);
}

.preview-nav__link--active {
  background: var(--button-color, var(--accent));
  color: var(--button-text-color, #FFFFFF);
}

/* Preview Card */
.preview-card {
  background: var(--card-color, var(--bg-tertiary));
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 48px;
  max-width: 100%;
  transition: all var(--transition-base);
}

.preview-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 32px rgba(0, 0, 0, 0.2);
}

.preview-card__icon {
  width: 56px;
  height: 56px;
  background: var(--card-color, var(--accent));
  border-radius: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  margin-bottom: 20px;
  color: var(--card-text-color, #FFFFFF);
}

.preview-card__title {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--card-text-color, var(--text-primary));
  margin-bottom: 12px;
}

.preview-card__text {
  font-size: 1rem;
  color: var(--card-text-color, var(--text-primary));
  line-height: 1.6;
  opacity: 0.9;
}

/* Preview Input */
.preview-input {
  width: 100%;
  padding: 20px 24px;
  font-size: 1.125rem;
  font-weight: 500;
  color: var(--card-text-color, var(--text-primary));
  background: var(--card-color, var(--bg-tertiary));
  border: 2px solid var(--card-color, var(--border));
  border-radius: 12px;
  outline: none;
  transition: all var(--transition-base);
}

.preview-input:focus {
  border-color: var(--card-color, var(--accent));
}

.preview-input::placeholder {
  color: var(--card-text-color, var(--text-muted));
  opacity: 0.5;
}

/* Preview Toggle */
.preview-toggle {
  display: flex;
  align-items: center;
  gap: 16px;
  cursor: pointer;
}

.preview-toggle__input {
  display: none;
}

.preview-toggle__slider {
  width: 56px;
  height: 32px;
  background: var(--bg-tertiary);
  border-radius: 16px;
  position: relative;
  transition: all var(--transition-base);
  border: 2px solid var(--card-color, var(--border));
}

.preview-toggle__slider::before {
  content: '';
  position: absolute;
  width: 24px;
  height: 24px;
  background: var(--card-color, var(--accent));
  border-radius: 50%;
  top: 2px;
  left: 2px;
  transition: all var(--transition-base);
}

.preview-toggle__input:checked + .preview-toggle__slider {
  background: var(--card-color, var(--accent));
  border-color: var(--card-color, var(--accent));
}

.preview-toggle__input:checked + .preview-toggle__slider::before {
  transform: translateX(24px);
  background: var(--card-text-color, #FFFFFF);
}

.preview-toggle__label {
  font-size: 1rem;
  font-weight: 500;
  color: var(--card-text-color, var(--text-primary));
}

/* ========== Responsive ========== */
@media (max-width: 1024px) {
  .preview-area {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 768px) {
  .header__nav {
    display: none;
  }

  .header__menu-toggle {
    display: flex;
  }

  .ui-preview__title {
    font-size: 2rem;
  }

  .preview-area {
    grid-template-columns: 1fr;
  }

  .color-controls {
    flex-direction: column;
    align-items: stretch;
  }

  .color-control {
    min-width: auto;
  }

  .preview-section {
    padding: 32px;
  }

  .header__container,
  .ui-preview__container {
    padding: 0 20px;
  }

  .preview-section {
    padding: 48px;
  }
}

@media (max-width: 480px) {
  .ui-preview__title {
    font-size: 1.75rem;
  }

  .preview-section {
    padding: 24px;
  }

  .preview-btn {
    padding: 14px 24px;
  }
}