/* Full-Screen Loading Animation - Notebook Theme */

.loading-overlay {
  position: fixed !important;
  top: 0 !important;
  left: 0 !important;
  right: 0 !important;
  bottom: 0 !important;
  width: 100% !important;
  height: 100% !important;
  background-color: rgba(250, 249, 247, 0.4);
  z-index: 99999 !important;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  visibility: hidden;
  transition: none;
  pointer-events: none;
}

.loading-overlay--visible {
  opacity: 1;
  visibility: visible;
  pointer-events: all;
}

.loading-overlay:not(.loading-overlay--visible) :is(.loading-pen, .loading-writing-line, .loading-writing-dot) {
  animation-play-state: paused;
}

.loading-overlay:not(.loading-overlay--visible) .loading-text {
  animation: none;
}

.turbo-progress-bar {
  background: var(--action-primary);
}

form[aria-busy="true"] [type="submit"] {
  cursor: progress;
  opacity: 0.65;
}

.loading-content {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-xl);
  max-width: 400px;
  padding: var(--space-xl);
  text-align: center;
}

/* Notebook Paper Background */
.loading-paper {
  position: relative;
  width: 160px;
  height: 220px;
  background-color: var(--paper-aged);
  border-radius: 2px;
  box-shadow: 
    0 2px 8px rgba(42, 37, 32, 0.08),
    0 6px 16px rgba(42, 37, 32, 0.05),
    inset 0 1px 0 rgba(255, 255, 255, 0.5);
  overflow: hidden;
  transform: scale(0.9);
  transition: transform 0.5s cubic-bezier(0.4, 0, 0.2, 1);
  border: 1px solid rgba(200, 184, 154, 0.2);
}

.loading-overlay--visible .loading-paper {
  transform: scale(1);
}

/* Notebook Lines */
.loading-paper::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-image: 
    repeating-linear-gradient(
      transparent,
      transparent 24px,
      rgba(200, 184, 154, 0.25) 24px,
      rgba(200, 184, 154, 0.25) 25px
    );
  background-position: 0 32px;
  opacity: 0.4;
  pointer-events: none;
}

/* Left Margin Line */
.loading-paper::after {
  content: '';
  position: absolute;
  top: 0;
  bottom: 0;
  left: 32px;
  width: 1px;
  background-color: rgba(200, 184, 154, 0.3);
  opacity: 0.5;
  pointer-events: none;
}

/* Pen Writing Animation */
.loading-pen-container {
  position: absolute;
  top: 48px;
  left: 40px;
  width: 80px;
  height: 100px;
  transform-origin: 0 0;
}

.loading-pen {
  position: absolute;
  width: 6px;
  height: 40px;
  background: linear-gradient(
    to bottom,
    var(--ink-dark) 0%,
    var(--ink-dark) 85%,
    var(--leather-brown) 85%,
    var(--leather-brown) 100%
  );
  border-radius: 3px 3px 0 0;
  transform-origin: bottom center;
  transform: rotate(-15deg);
  box-shadow: 0 3px 6px rgba(42, 37, 32, 0.3);
  animation: pen-writing 2s cubic-bezier(0.4, 0, 0.2, 1) infinite;
}

.loading-pen-tip {
  position: absolute;
  bottom: -3px;
  left: 50%;
  transform: translateX(-50%);
  width: 4px;
  height: 6px;
  background-color: var(--ink-dark);
  border-radius: 0 0 2px 2px;
}

/* Writing Line Animation */
.loading-writing-line {
  position: absolute;
  top: 16px;
  left: 0;
  width: 0;
  height: 3px;
  background-color: var(--ink-dark);
  border-radius: 2px;
  opacity: 0.8;
  animation: writing-line 2s cubic-bezier(0.4, 0, 0.2, 1) infinite;
  transform-origin: left center;
}

/* Writing Dots */
.loading-writing-dot {
  position: absolute;
  width: 4px;
  height: 4px;
  background-color: var(--ink-dark);
  border-radius: 50%;
  opacity: 0;
  animation: writing-dot 2s cubic-bezier(0.4, 0, 0.2, 1) infinite;
}

.loading-writing-dot:nth-child(1) {
  top: 28px;
  left: 16px;
  animation-delay: 0.3s;
}

.loading-writing-dot:nth-child(2) {
  top: 40px;
  left: 28px;
  animation-delay: 0.6s;
}

.loading-writing-dot:nth-child(3) {
  top: 52px;
  left: 40px;
  animation-delay: 0.9s;
}

/* Animations */
@keyframes pen-writing {
  0%, 100% {
    transform: rotate(-15deg) translateX(0) translateY(0);
  }
  25% {
    transform: rotate(-12deg) translateX(16px) translateY(12px);
  }
  50% {
    transform: rotate(-18deg) translateX(32px) translateY(24px);
  }
  75% {
    transform: rotate(-14deg) translateX(48px) translateY(36px);
  }
}

@keyframes writing-line {
  0% {
    width: 0;
    opacity: 0;
  }
  10% {
    opacity: 0.8;
  }
  90% {
    opacity: 0.8;
  }
  100% {
    width: 64px;
    opacity: 0;
  }
}

@keyframes writing-dot {
  0%, 90%, 100% {
    opacity: 0;
    transform: scale(0);
  }
  5%, 85% {
    opacity: 1;
    transform: scale(1);
  }
}

/* Loading Text */
.loading-text {
  font-family: var(--font-serif);
  font-size: var(--text-lg);
  color: var(--ink-dark);
  margin: 0;
  padding: var(--space-md) var(--space-lg);
  background-color: var(--paper-aged);
  border-radius: 8px;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
  border: 1px solid rgba(200, 184, 154, 0.2);
  opacity: 0;
  animation: text-fade-in 0.5s cubic-bezier(0.4, 0, 0.2, 1) 0.2s forwards;
}

.loading-overlay--visible .loading-text {
  animation: text-fade-in 0.5s cubic-bezier(0.4, 0, 0.2, 1) 0.2s forwards;
}

@keyframes text-fade-in {
  from {
    opacity: 0;
    transform: translateY(10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Reduced Motion Support */
@media (prefers-reduced-motion: reduce) {
  .loading-overlay {
    transition: none;
  }

  .loading-paper {
    transition: transform 0.2s ease;
  }

  .loading-pen {
    animation: none;
    transform: rotate(-15deg) translateX(40px) translateY(30px);
  }

  .loading-writing-line {
    animation: none;
    width: 64px;
    opacity: 0.6;
  }

  .loading-writing-dot {
    animation: none;
    opacity: 0.6;
  }

  .loading-text {
    animation: none;
    opacity: 1;
  }
}

/* Mobile Responsive */
@media (max-width: 768px) {
  .loading-paper {
    width: 140px;
    height: 192px;
  }

  .loading-pen-container {
    top: 40px;
    left: 32px;
    width: 70px;
    height: 90px;
  }

  .loading-content {
    gap: var(--space-lg);
    padding: var(--space-lg);
  }

  .loading-text {
    font-size: var(--text-md);
  }
}
.progressive-section-loading {
  position: relative;
  display: grid;
  align-content: center;
  gap: var(--space-lg);
  width: 100%;
  padding: clamp(var(--space-lg), 4vw, var(--space-xl));
  overflow: hidden;
  border: 1px solid color-mix(in srgb, var(--sepia-line) 65%, transparent);
  border-radius: var(--radius-card);
  background: linear-gradient(145deg, color-mix(in srgb, var(--paper-aged) 88%, transparent), color-mix(in srgb, var(--paper-warm) 72%, transparent));
  color: var(--ink-muted);
  font-family: var(--font-sans);
  font-size: var(--text-sm);
  box-shadow: 0 8px 24px color-mix(in srgb, var(--ink-dark) 5%, transparent);
}

.progressive-section-loading--medium {
  min-height: 12rem;
}

.progressive-section-loading--large {
  min-height: 18rem;
}

.progressive-section-loading--featured {
  min-height: 18rem;
}

.progressive-section-loading--shelf {
  min-height: 15rem;
}

.progressive-section-loading__skeleton {
  display: grid;
  gap: var(--space-lg);
}

.progressive-section-loading__heading {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

.progressive-section-loading__mark,
.progressive-section-loading__line,
.progressive-section-loading__body > span {
  display: block;
  background: color-mix(in srgb, var(--sepia-line) 55%, transparent);
}

.progressive-section-loading__mark {
  width: 2rem;
  height: 2rem;
  flex: 0 0 auto;
  border-radius: 50%;
}

.progressive-section-loading__line {
  height: 0.65rem;
  border-radius: 999px;
}

.progressive-section-loading__line--title {
  width: min(38%, 14rem);
}

.progressive-section-loading__line--action {
  width: min(18%, 7rem);
  margin-left: auto;
}

.progressive-section-loading__body {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: var(--space-md);
}

.progressive-section-loading__body > span {
  min-height: 6rem;
  border-radius: calc(var(--radius-card) - 2px);
}

.progressive-section-loading--large .progressive-section-loading__body > span,
.progressive-section-loading--featured .progressive-section-loading__body > span {
  min-height: 9rem;
}

.progressive-section-loading--featured .progressive-section-loading__body {
  grid-template-columns: minmax(7rem, 0.35fr) minmax(0, 1fr);
}

.progressive-section-loading--featured .progressive-section-loading__body > span:last-child {
  display: none;
}

.progressive-section-loading--shelf .progressive-section-loading__body > span {
  min-height: 8rem;
}

.progressive-section-loading__label {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
}

.progressive-section-loading__spinner {
  width: 1rem;
  height: 1rem;
  flex: 0 0 auto;
  border: 2px solid var(--sepia-line);
  border-top-color: var(--ui-accent);
  border-radius: 50%;
  animation: progressive-section-spin 700ms linear infinite;
}

@keyframes progressive-section-spin {
  to {
    transform: rotate(360deg);
  }
}

@media (prefers-reduced-motion: reduce) {
  .progressive-section-loading__spinner {
    animation: none;
    border-color: var(--ui-accent);
  }
}

@media (max-width: 600px) {
  .progressive-section-loading {
    gap: var(--space-md);
    padding: var(--space-lg);
  }

  .progressive-section-loading__body {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .progressive-section-loading__body > span:last-child {
    display: none;
  }
}