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

:root {
  /* Default theme (Original) */
  --gradient-bg: linear-gradient(135deg, #1a1a1a, #2c3e50);
  --gradient-btn: linear-gradient(45deg, #2196F3, #4CAF50);
  --gradient-btn-hover: linear-gradient(45deg, #1976D2, #45a049);
  --gradient-book: linear-gradient(145deg, #1a2a6c, #b21f1f, #fdbb2d);
  --gradient-zoom: linear-gradient(45deg, #ffd700, #d4af7a);
  --gradient-zoom-hover: linear-gradient(45deg, #ffe066, #c9a14a);
  --text-color: #fff;
  --shadow-color: rgba(0, 0, 0, 0.2);
}

/* White theme */
[data-theme="white"] {
  --gradient-bg: linear-gradient(135deg, #f5f7fa, #e4e8eb);
  --gradient-btn: linear-gradient(45deg, #ffffff, #f0f0f0);
  --gradient-btn-hover: linear-gradient(45deg, #f0f0f0, #e0e0e0);
  --gradient-book: linear-gradient(145deg, #ffffff, #f5f7fa, #e4e8eb);
  --gradient-zoom: linear-gradient(45deg, #ffffff, #f0f0f0);
  --gradient-zoom-hover: linear-gradient(45deg, #f0f0f0, #e0e0e0);
  --text-color: #333;
  --shadow-color: rgba(0, 0, 0, 0.1);
}

/* Basic Blue theme */
[data-theme="blue"] {
  --gradient-bg: linear-gradient(135deg, #1e3c72, #2a5298);
  --gradient-btn: linear-gradient(45deg, #2196F3, #00bcd4);
  --gradient-btn-hover: linear-gradient(45deg, #1976D2, #0097a7);
  --gradient-book: linear-gradient(145deg, #1e3c72, #2a5298, #2196F3);
  --gradient-zoom: linear-gradient(45deg, #2196F3, #00bcd4);
  --gradient-zoom-hover: linear-gradient(45deg, #1976D2, #0097a7);
  --text-color: #fff;
  --shadow-color: rgba(33, 150, 243, 0.3);
}

/* Basic Purple theme */
[data-theme="purple"] {
  --gradient-bg: linear-gradient(135deg, #4a148c, #7b1fa2);
  --gradient-btn: linear-gradient(45deg, #9c27b0, #ba68c8);
  --gradient-btn-hover: linear-gradient(45deg, #7b1fa2, #9c27b0);
  --gradient-book: linear-gradient(145deg, #4a148c, #7b1fa2, #9c27b0);
  --gradient-zoom: linear-gradient(45deg, #9c27b0, #ba68c8);
  --gradient-zoom-hover: linear-gradient(45deg, #7b1fa2, #9c27b0);
  --text-color: #fff;
  --shadow-color: rgba(156, 39, 176, 0.3);
}

/* Basic Green theme */
[data-theme="green"] {
  --gradient-bg: linear-gradient(135deg, #1b4332, #2d6a4f);
  --gradient-btn: linear-gradient(45deg, #4caf50, #8bc34a);
  --gradient-btn-hover: linear-gradient(45deg, #388e3c, #689f38);
  --gradient-book: linear-gradient(145deg, #1b4332, #2d6a4f, #4caf50);
  --gradient-zoom: linear-gradient(45deg, #4caf50, #8bc34a);
  --gradient-zoom-hover: linear-gradient(45deg, #388e3c, #689f38);
  --text-color: #fff;
  --shadow-color: rgba(76, 175, 80, 0.3);
}

/* Neon theme */
[data-theme="neon"] {
  --gradient-bg: linear-gradient(135deg, #0f0c29, #302b63, #24243e);
  --gradient-btn: linear-gradient(45deg, #00ff87, #60efff);
  --gradient-btn-hover: linear-gradient(45deg, #00ff9d, #00b8ff);
  --gradient-book: linear-gradient(145deg, #ff00ff, #00ffff, #ff00aa);
  --gradient-zoom: linear-gradient(45deg, #ff00ff, #00ffff);
  --gradient-zoom-hover: linear-gradient(45deg, #ff00aa, #00ff87);
  --text-color: #fff;
  --shadow-color: rgba(0, 255, 255, 0.3);
}

/* Galaxy theme */
[data-theme="galaxy"] {
  --gradient-bg: linear-gradient(135deg, #000428, #004e92);
  --gradient-btn: linear-gradient(45deg, #ff3cac, #784ba0, #2b86c5);
  --gradient-btn-hover: linear-gradient(45deg, #ff3cac, #2b86c5);
  --gradient-book: linear-gradient(145deg, #ff3cac, #784ba0, #2b86c5);
  --gradient-zoom: linear-gradient(45deg, #ff3cac, #784ba0);
  --gradient-zoom-hover: linear-gradient(45deg, #784ba0, #2b86c5);
  --text-color: #fff;
  --shadow-color: rgba(255, 60, 172, 0.3);
}

/* Sunset theme */
[data-theme="sunset"] {
  --gradient-bg: linear-gradient(135deg, #ff512f, #dd2476);
  --gradient-btn: linear-gradient(45deg, #ff9966, #ff5e62);
  --gradient-btn-hover: linear-gradient(45deg, #ff5e62, #ff9966);
  --gradient-book: linear-gradient(145deg, #ff512f, #dd2476, #ff9966);
  --gradient-zoom: linear-gradient(45deg, #ff9966, #ff5e62);
  --gradient-zoom-hover: linear-gradient(45deg, #ff5e62, #ff9966);
  --text-color: #fff;
  --shadow-color: rgba(255, 94, 98, 0.3);
}

body {
  margin: 0;
  padding: 20px;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  background: var(--gradient-bg);
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  color: var(--text-color);
  transition: background 0.3s;
}

.upload-container {
  position: fixed;
  top: 20px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 1000;
  text-align: center;
}

.upload-text {
  margin-bottom: 20px;
}

.upload-text h2 {
  font-size: 28px;
  font-weight: 600;
  margin-bottom: 8px;
  color: var(--text-color);
  text-shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
}

.upload-text p {
  font-size: 16px;
  color: var(--text-color);
  opacity: 0.9;
  margin: 0;
}

.button-container {
  display: flex !important;
  flex-direction: row !important;
  justify-content: space-between !important;
  align-items: center !important;
  width: 100%;
  max-width: 600px;
  flex-wrap: nowrap !important;
}

.summary-controls {
  margin: 0;
  padding: 0;
  display: flex;
  align-items: center;
}

.summary-btn {
  background: var(--gradient-btn);
  color: var(--text-color);
  padding: 15px 30px;
  border: none;
  border-radius: 30px;
  cursor: pointer;
  font-weight: 600;
  font-size: 16px;
  transition: all 0.3s ease;
  box-shadow: 0 4px 15px var(--shadow-color);
  display: none;
  align-items: center;
  gap: 10px;
  min-width: 200px;
  justify-content: center;
  flex-shrink: 0;
}

.summary-btn:hover {
  transform: translateY(-2px);
  background: var(--gradient-btn-hover);
  box-shadow: 0 6px 20px var(--shadow-color);
}

.summary-btn:disabled {
  opacity: 0.6;
  cursor: not-allowed;
  transform: none;
}

.upload-btn {
  background: var(--gradient-btn);
  color: var(--text-color);
  padding: 15px 30px;
  border-radius: 30px;
  cursor: pointer;
  display: flex !important;
  align-items: center;
  gap: 10px;
  font-weight: 600;
  font-size: 16px;
  box-shadow: 0 4px 15px var(--shadow-color);
  transition: all 0.3s ease;
  min-width: 200px;
  justify-content: center;
  flex-shrink: 0;
}

.upload-btn:hover {
  transform: translateY(-2px);
  background: var(--gradient-btn-hover);
}

.file-input {
  display: none;
}

#book-wrapper {
  display: flex;
  justify-content: center;
  align-items: center;
  margin-top: 100px;
  transition: width 0.3s, height 0.3s;
  background: var(--gradient-book);
  border-radius: 12px;
  box-shadow: 
    0 8px 32px rgba(44, 24, 6, 0.25),
    inset 0 0 50px rgba(0, 0, 0, 0.2);
  padding: 25px;
  position: relative;
  overflow: hidden;
  border: 2px solid rgba(255, 255, 255, 0.1);
  max-width: 95vw;
  max-height: 85vh;
  width: 900px;
  height: 600px;
}

#book-wrapper::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: 
    repeating-linear-gradient(
      45deg,
      rgba(255, 255, 255, 0.1) 0px,
      rgba(255, 255, 255, 0.1) 1px,
      transparent 1px,
      transparent 10px
    ),
    repeating-linear-gradient(
      -45deg,
      rgba(255, 255, 255, 0.1) 0px,
      rgba(255, 255, 255, 0.1) 1px,
      transparent 1px,
      transparent 10px
    );
  opacity: 0.3;
}

#book-wrapper::after {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 80%;
  height: 80%;
  background: radial-gradient(
    circle at center,
    rgba(255, 255, 255, 0.2) 0%,
    transparent 70%
  );
  pointer-events: none;
}

#flipbook {
  display: flex;
  perspective: 1500px;
  transform-style: preserve-3d;
  transform-origin: center;
  width: 100%;
  height: 100%;
}

.page {
  width: 100%;
  height: 100%;
  background: #fff;
  position: relative;
  overflow: hidden;
  transition: transform 0.5s ease-in-out;
  backface-visibility: hidden;
  transform-style: preserve-3d;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 
    0 0 15px rgba(0, 0, 0, 0.1),
    inset 0 0 20px rgba(0, 0, 0, 0.05);
  transform-origin: center;
  border: 1px solid rgba(255, 255, 255, 0.2);
  backdrop-filter: blur(5px);
}

canvas {
  max-width: 100%;
  max-height: 100%;
  transform: scale(0.9);
  object-fit: contain;
}

.page.flipped {
  transform: rotateY(-180deg);
  z-index: 0;
}

.page.flipped-back {
  transform: rotateY(0deg);
  z-index: 1;
}

.navigation {
  margin-top: 30px;
  display: flex;
  gap: 20px;
}

button {
  background: var(--gradient-btn);
  color: var(--text-color);
  padding: 12px 28px;
  border: none;
  border-radius: 30px;
  cursor: pointer;
  font-size: 16px;
  font-weight: bold;
  transition: all 0.3s ease;
  box-shadow: 0 4px 15px var(--shadow-color);
}

button:hover {
  transform: translateY(-2px);
  background: var(--gradient-btn-hover);
}

.zoom-controls {
  position: fixed;
  bottom: 30px;
  right: 30px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  z-index: 9999;
  background: rgba(255, 255, 255, 0.15);
  padding: 12px;
  border-radius: 16px;
  backdrop-filter: blur(10px);
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.2);
  transition: all 0.3s ease;
}

.zoom-controls:hover {
  background: rgba(255, 255, 255, 0.2);
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.15);
}

.zoom-btn {
  background: var(--gradient-zoom);
  color: var(--text-color);
  border: 2px solid rgba(255, 255, 255, 0.3);
  border-radius: 12px;
  width: 45px;
  height: 45px;
  font-size: 24px;
  font-weight: bold;
  cursor: pointer;
  box-shadow: 0 4px 15px var(--shadow-color);
  transition: all 0.3s ease;
  display: flex;
  align-items: center;
  justify-content: center;
  text-shadow: 0 1px 2px rgba(0, 0, 0, 0.2);
  opacity: 1;
  visibility: visible;
  position: relative;
  overflow: hidden;
  padding: 0;
  line-height: 1;
}

.zoom-btn:hover {
  background: var(--gradient-zoom-hover);
  transform: translateY(-2px);
  box-shadow: 0 6px 20px var(--shadow-color);
  border-color: rgba(255, 255, 255, 0.4);
}

.zoom-btn:active {
  transform: translateY(1px);
  box-shadow: 0 2px 10px var(--shadow-color);
}

/* Add specific styles for zoom in/out icons */
#zoomIn, #zoomOut {
  font-size: 26px;
  letter-spacing: -2px;
}

#zoomIn {
  color: #fff;
  text-shadow: 0 0 10px rgba(255, 255, 255, 0.5);
}

#zoomOut {
  color: #fff;
  text-shadow: 0 0 10px rgba(255, 255, 255, 0.5);
}

/* Ensure the zoom buttons are visible in all themes */
[data-theme] .zoom-controls {
  background: rgba(255, 255, 255, 0.15);
}

[data-theme] .zoom-btn {
  opacity: 1;
  visibility: visible;
}

/* Add responsive styles for mobile */
@media (max-width: 768px) {
  .zoom-controls {
    bottom: 20px;
    right: 20px;
    padding: 8px;
  }
  
  .zoom-btn {
    width: 40px;
    height: 40px;
    font-size: 18px;
  }
}

.zoom-value {
  font-size: 14px;
  color: #666;
  min-width: 50px;
  text-align: center;
}

/* Theme selector */
.theme-selector {
  position: fixed;
  top: 20px;
  right: 20px;
  display: flex;
  gap: 10px;
}

.theme-btn {
  width: 30px;
  height: 30px;
  border-radius: 50%;
  border: 2px solid rgba(255, 255, 255, 0.3);
  cursor: pointer;
  transition: transform 0.3s;
  box-shadow: 0 2px 8px var(--shadow-color);
}

.theme-btn:hover {
  transform: scale(1.1);
}

.theme-btn[data-theme="default"] {
  background: linear-gradient(135deg, #1a1a1a, #2c3e50);
}

.theme-btn[data-theme="white"] {
  background: linear-gradient(135deg, #ffffff, #f5f7fa);
  box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
  border: 2px solid rgba(0, 0, 0, 0.1);
}

.theme-btn[data-theme="blue"] {
  background: linear-gradient(135deg, #1e3c72, #2a5298);
  box-shadow: 0 0 10px #2196F3;
}

.theme-btn[data-theme="purple"] {
  background: linear-gradient(135deg, #4a148c, #7b1fa2);
  box-shadow: 0 0 10px #9c27b0;
}

.theme-btn[data-theme="green"] {
  background: linear-gradient(135deg, #1b4332, #2d6a4f);
  box-shadow: 0 0 10px #4caf50;
}

.theme-btn[data-theme="neon"] {
  background: linear-gradient(135deg, #00ff87, #60efff);
  box-shadow: 0 0 10px #00ff87;
}

.theme-btn[data-theme="galaxy"] {
  background: linear-gradient(135deg, #ff3cac, #784ba0, #2b86c5);
  box-shadow: 0 0 10px #ff3cac;
}

.theme-btn[data-theme="sunset"] {
  background: linear-gradient(135deg, #ff512f, #dd2476);
  box-shadow: 0 0 10px #ff512f;
}

/* Size controls */
.size-controls {
  position: fixed;
  top: 50%;
  right: 20px;
  transform: translateY(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 15px;
  background: var(--gradient-btn);
  padding: 20px 15px;
  border-radius: 20px;
  box-shadow: 0 4px 15px var(--shadow-color);
  z-index: 1000;
}

.size-controls label {
  color: var(--text-color);
  font-weight: 500;
  font-size: 14px;
  margin-bottom: 5px;
}

.size-slider {
  width: 150px;
  height: 6px;
  -webkit-appearance: none;
  background: rgba(255, 255, 255, 0.2);
  border-radius: 3px;
  outline: none;
  margin: 10px 0;
}

.size-slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 18px;
  height: 18px;
  background: var(--text-color);
  border-radius: 50%;
  cursor: pointer;
  transition: transform 0.2s;
}

.size-slider::-webkit-slider-thumb:hover {
  transform: scale(1.1);
}

.size-value {
  color: var(--text-color);
  font-weight: 500;
  min-width: 40px;
  text-align: center;
}

/* AI Summary Controls */
.summary-controls {
  position: fixed;
  top: 70px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 1000;
}

.summary-btn {
  background: var(--gradient-btn);
  color: var(--text-color);
  padding: 12px 25px;
  border: none;
  border-radius: 30px;
  cursor: pointer;
  font-weight: 500;
  font-size: 16px;
  box-shadow: 0 4px 15px var(--shadow-color);
  transition: transform 0.3s, background 0.3s;
  display: flex;
  align-items: center;
  gap: 10px;
}

.summary-btn:hover {
  transform: translateY(-2px);
  background: var(--gradient-btn-hover);
}

.summary-btn:disabled {
  opacity: 0.6;
  cursor: not-allowed;
  transform: none;
}

/* Summary Modal */
.summary-modal {
  display: none;
  position: fixed;
  z-index: 9999;
  left: 0;
  top: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(0, 0, 0, 0.7);
  backdrop-filter: blur(5px);
}

.summary-content {
  background: var(--gradient-bg);
  margin: 5% auto;
  padding: 0;
  border-radius: 15px;
  width: 90%;
  max-width: 800px;
  max-height: 80vh;
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
  border: 2px solid rgba(255, 255, 255, 0.1);
  overflow: hidden;
  position: relative;
  z-index: 10000;
}

.summary-header {
  background: var(--gradient-btn);
  padding: 20px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.summary-header h2 {
  margin: 0;
  color: var(--text-color);
  font-size: 24px;
}

.close-btn {
  background: none;
  border: none;
  color: var(--text-color);
  font-size: 28px;
  cursor: pointer;
  padding: 0;
  width: 30px;
  height: 30px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  transition: background 0.3s;
}

.close-btn:hover {
  background: rgba(255, 255, 255, 0.2);
}

.summary-body {
  padding: 30px;
  max-height: 400px;
  overflow-y: auto;
}

.summary-text {
  color: var(--text-color);
  line-height: 1.6;
  font-size: 16px;
  white-space: pre-wrap;
}

.summary-footer {
  padding: 20px;
  display: flex;
  gap: 15px;
  justify-content: center;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  background: rgba(0, 0, 0, 0.1);
}

.download-btn, .copy-btn {
  background: var(--gradient-btn);
  color: var(--text-color);
  padding: 12px 20px;
  border: none;
  border-radius: 25px;
  cursor: pointer;
  font-weight: 500;
  font-size: 14px;
  transition: transform 0.3s, background 0.3s;
  display: flex;
  align-items: center;
  gap: 8px;
}

.download-btn:hover, .copy-btn:hover {
  transform: translateY(-2px);
  background: var(--gradient-btn-hover);
}

/* Loading Overlay */
.loading-overlay {
  position: fixed;
  z-index: 3000;
  left: 0;
  top: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(0, 0, 0, 0.8);
  backdrop-filter: blur(10px);
  display: flex;
  align-items: center;
  justify-content: center;
}

.loading-content {
  background: var(--gradient-bg);
  padding: 40px;
  border-radius: 20px;
  text-align: center;
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.5);
  border: 2px solid rgba(255, 255, 255, 0.1);
  max-width: 400px;
}

.spinner {
  width: 50px;
  height: 50px;
  border: 4px solid rgba(255, 255, 255, 0.3);
  border-top: 4px solid var(--text-color);
  border-radius: 50%;
  animation: spin 1s linear infinite;
  margin: 0 auto 20px;
}

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

.loading-content p {
  color: var(--text-color);
  font-size: 18px;
  margin: 10px 0;
}

.loading-subtitle {
  font-size: 14px !important;
  opacity: 0.7;
  margin-top: 10px !important;
}

/* Responsive Design for Summary */
@media (max-width: 768px) {
  body {
    padding: 10px;
  }

  .upload-container {
    position: relative;
    top: auto;
    left: auto;
    transform: none;
    margin-bottom: 20px;
    width: 100%;
  }

  .upload-text h2 {
    font-size: 24px;
    margin-bottom: 15px;
  }

  .button-container {
    flex-direction: column !important;
    gap: 15px;
    width: 100%;
    max-width: 100%;
  }

  .upload-btn, .summary-btn {
    width: 100%;
    max-width: 300px;
    padding: 12px 20px;
    font-size: 14px;
    min-width: auto;
  }

  .theme-selector {
    position: fixed;
    top: 10px;
    right: 10px;
    z-index: 1001;
    flex-direction: column;
    gap: 5px;
  }

  .theme-btn {
    width: 35px;
    height: 35px;
    font-size: 12px;
  }

  #book-wrapper {
    margin-top: 20px;
    width: 95vw;
    height: 60vh;
    max-width: 95vw;
    max-height: 60vh;
    padding: 15px;
  }

  .navigation {
    position: fixed;
    bottom: 20px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 1000;
    display: flex;
    gap: 10px;
  }

  .navigation button {
    padding: 10px 20px;
    font-size: 14px;
    border-radius: 25px;
  }

  .zoom-controls {
    position: fixed;
    bottom: 80px;
    right: 15px;
    z-index: 1000;
    flex-direction: column;
    gap: 8px;
  }

  .zoom-btn {
    width: 45px;
    height: 45px;
    font-size: 18px;
  }

  .size-controls {
    position: fixed;
    bottom: 20px;
    right: 15px;
    z-index: 1000;
    background: rgba(0, 0, 0, 0.7);
    padding: 10px;
    border-radius: 15px;
    flex-direction: column;
    gap: 5px;
    align-items: center;
  }

  .size-controls label {
    font-size: 12px;
  }

  .size-slider {
    width: 80px;
    height: 6px;
  }

  .size-value {
    font-size: 12px;
  }

  .summary-content {
    width: 95%;
    margin: 10% auto;
    max-height: 85vh;
  }
  
  .summary-header {
    padding: 15px;
  }
  
  .summary-header h2 {
    font-size: 20px;
  }
  
  .summary-body {
    padding: 20px;
    max-height: 300px;
  }
  
  .summary-footer {
    padding: 15px;
    flex-direction: column;
  }
  
  .download-btn, .copy-btn {
    width: 100%;
    justify-content: center;
  }
  
  .summary-controls {
    top: 60px;
  }
  
  .summary-btn {
    padding: 10px 20px;
    font-size: 14px;
  }

  .loading-content {
    margin: 20px;
    padding: 30px;
    max-width: 90%;
  }

  .loading-content p {
    font-size: 16px;
  }

  .loading-subtitle {
    font-size: 12px !important;
  }
}

/* Extra small devices */
@media (max-width: 480px) {
  .upload-text h2 {
    font-size: 20px;
  }

  .button-container {
    gap: 10px;
  }

  .upload-btn, .summary-btn {
    padding: 10px 15px;
    font-size: 13px;
  }

  #book-wrapper {
    height: 50vh;
    max-height: 50vh;
    padding: 10px;
  }

  .theme-selector {
    top: 5px;
    right: 5px;
  }

  .theme-btn {
    width: 30px;
    height: 30px;
    font-size: 10px;
  }

  .navigation {
    bottom: 15px;
  }

  .navigation button {
    padding: 8px 15px;
    font-size: 12px;
  }

  .zoom-controls {
    bottom: 70px;
    right: 10px;
  }

  .zoom-btn {
    width: 40px;
    height: 40px;
    font-size: 16px;
  }

  .size-controls {
    bottom: 15px;
    right: 10px;
    padding: 8px;
  }

  .size-slider {
    width: 70px;
  }
}

/* Progress bar styles */
.summary-progress {
  padding: 20px;
  text-align: center;
}

.progress-bar {
  width: 100%;
  height: 20px;
  background: #e9ecef;
  border-radius: 10px;
  overflow: hidden;
  margin-bottom: 15px;
}

.progress-fill {
  height: 100%;
  background: linear-gradient(90deg, #007bff, #0056b3);
  width: 0%;
  transition: width 0.3s ease;
  animation: progress-animation 2s infinite;
}

@keyframes progress-animation {
  0% { width: 0%; }
  50% { width: 100%; }
  100% { width: 0%; }
}

#progressText {
  font-size: 14px;
  color: #6c757d;
  margin: 0;
}

.auto-status {
  margin-top: 10px;
  padding: 8px 15px;
  background: rgba(255, 255, 255, 0.1);
  border-radius: 20px;
  text-align: center;
  font-size: 14px;
  color: var(--text-color);
  border: 1px solid rgba(255, 255, 255, 0.2);
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0% { opacity: 0.7; }
  50% { opacity: 1; }
  100% { opacity: 0.7; }
}

/* ==============================
   Firebase Authentication Styles
   ============================== */

/* User Status */
.user-status {
  position: fixed;
  top: 20px;
  left: 20px;
  z-index: 1000;
  background: rgba(255, 255, 255, 0.1);
  backdrop-filter: blur(10px);
  border-radius: 15px;
  padding: 15px;
  border: 1px solid rgba(255, 255, 255, 0.2);
  box-shadow: 0 4px 15px var(--shadow-color);
}

.user-info {
  display: flex;
  flex-direction: column;
  gap: 10px;
  align-items: flex-start;
}

.user-info span {
  color: var(--text-color);
  font-weight: 500;
  font-size: 14px;
}

.login-prompt {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.auth-btn, .logout-btn, .view-saved-btn {
  background: var(--gradient-btn);
  color: var(--text-color);
  border: none;
  border-radius: 20px;
  padding: 8px 16px;
  font-size: 12px;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.3s ease;
  box-shadow: 0 2px 8px var(--shadow-color);
  display: flex;
  align-items: center;
  gap: 5px;
}

.auth-btn:hover, .logout-btn:hover, .view-saved-btn:hover {
  transform: translateY(-1px);
  background: var(--gradient-btn-hover);
  box-shadow: 0 4px 12px var(--shadow-color);
}

.logout-btn {
  background: linear-gradient(45deg, #ff6b6b, #ee5a52);
}

.logout-btn:hover {
  background: linear-gradient(45deg, #ff5252, #d32f2f);
}

.view-saved-btn {
  background: linear-gradient(45deg, #4ecdc4, #44a08d);
}

.view-saved-btn:hover {
  background: linear-gradient(45deg, #26a69a, #00695c);
}

/* Authentication Modals */
.auth-modal, .saved-modal, .login-prompt-modal {
  display: none;
  position: fixed;
  z-index: 9999;
  left: 0;
  top: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(0, 0, 0, 0.7);
  backdrop-filter: blur(5px);
}

.auth-content, .saved-content {
  background: var(--gradient-bg);
  margin: 10% auto;
  padding: 0;
  border-radius: 15px;
  width: 90%;
  max-width: 500px;
  max-height: 80vh;
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
  border: 2px solid rgba(255, 255, 255, 0.1);
  overflow: hidden;
  position: relative;
  z-index: 10000;
}

/* Login Prompt Modal Styles */
.login-prompt-content {
  background: var(--gradient-bg);
  margin: 15% auto;
  padding: 0;
  border-radius: 20px;
  width: 90%;
  max-width: 600px;
  max-height: 70vh;
  box-shadow: 0 25px 50px rgba(0, 0, 0, 0.4);
  border: 2px solid rgba(255, 255, 255, 0.1);
  overflow: hidden;
  position: relative;
  z-index: 10000;
  animation: loginPromptSlideIn 0.4s ease-out;
}

@keyframes loginPromptSlideIn {
  from {
    opacity: 0;
    transform: translateY(-50px) scale(0.9);
  }
  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

.login-prompt-header {
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  padding: 25px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.login-prompt-header h2 {
  margin: 0;
  color: var(--text-color);
  font-size: 24px;
  font-weight: 600;
  text-shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
}

.login-prompt-body {
  padding: 40px;
  text-align: center;
}

.login-prompt-icon {
  font-size: 64px;
  margin-bottom: 20px;
  animation: bounce 2s infinite;
}

@keyframes bounce {
  0%, 20%, 50%, 80%, 100% {
    transform: translateY(0);
  }
  40% {
    transform: translateY(-10px);
  }
  60% {
    transform: translateY(-5px);
  }
}

.login-prompt-body h3 {
  color: var(--text-color);
  font-size: 28px;
  font-weight: 600;
  margin: 0 0 15px 0;
  text-shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
}

.login-prompt-body p {
  color: var(--text-color);
  font-size: 16px;
  line-height: 1.6;
  margin: 0 0 30px 0;
  opacity: 0.9;
}

.login-prompt-benefits {
  display: flex;
  justify-content: center;
  gap: 30px;
  margin: 30px 0;
  flex-wrap: wrap;
}

.benefit-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  padding: 15px;
  background: rgba(255, 255, 255, 0.1);
  border-radius: 15px;
  border: 1px solid rgba(255, 255, 255, 0.2);
  backdrop-filter: blur(10px);
  transition: all 0.3s ease;
  min-width: 120px;
}

.benefit-item:hover {
  background: rgba(255, 255, 255, 0.15);
  transform: translateY(-5px);
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.2);
}

.benefit-icon {
  font-size: 24px;
  margin-bottom: 5px;
}

.benefit-item span:last-child {
  color: var(--text-color);
  font-size: 14px;
  font-weight: 500;
}

.login-prompt-actions {
  display: flex;
  gap: 20px;
  justify-content: center;
  margin: 30px 0;
  flex-wrap: wrap;
}

.login-prompt-btn {
  padding: 15px 30px;
  border: none;
  border-radius: 25px;
  font-size: 16px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.3s ease;
  display: flex;
  align-items: center;
  gap: 8px;
  min-width: 140px;
  justify-content: center;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
}

.login-prompt-btn.primary {
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  color: white;
}

.login-prompt-btn.primary:hover {
  background: linear-gradient(135deg, #5a6fd8 0%, #6a4190 100%);
  transform: translateY(-3px);
  box-shadow: 0 8px 25px rgba(0, 0, 0, 0.3);
}

.login-prompt-btn.secondary {
  background: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
  color: white;
}

.login-prompt-btn.secondary:hover {
  background: linear-gradient(135deg, #e085f0 0%, #f04a5a 100%);
  transform: translateY(-3px);
  box-shadow: 0 8px 25px rgba(0, 0, 0, 0.3);
}

.login-prompt-footer {
  margin-top: 20px;
  padding-top: 20px;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.login-prompt-footer p {
  color: var(--text-color);
  font-size: 14px;
  margin: 0;
  opacity: 0.8;
  font-style: italic;
}

.auth-header, .saved-header {
  background: var(--gradient-btn);
  padding: 20px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.auth-header h2, .saved-header h2 {
  margin: 0;
  color: var(--text-color);
  font-size: 20px;
}

.auth-body, .saved-body {
  padding: 30px;
  max-height: 400px;
  overflow-y: auto;
}

/* Form Styles */
.form-group {
  margin-bottom: 20px;
}

.form-group label {
  display: block;
  color: var(--text-color);
  font-weight: 500;
  margin-bottom: 8px;
  font-size: 14px;
}

.form-group input {
  width: 100%;
  padding: 12px 15px;
  border: 2px solid rgba(255, 255, 255, 0.2);
  border-radius: 10px;
  background: rgba(255, 255, 255, 0.1);
  color: var(--text-color);
  font-size: 14px;
  transition: all 0.3s ease;
  backdrop-filter: blur(10px);
}

.form-group input:focus {
  outline: none;
  border-color: rgba(255, 255, 255, 0.4);
  background: rgba(255, 255, 255, 0.15);
  box-shadow: 0 0 10px rgba(255, 255, 255, 0.2);
}

.form-group input::placeholder {
  color: rgba(255, 255, 255, 0.6);
}

.auth-submit-btn {
  width: 100%;
  background: var(--gradient-btn);
  color: var(--text-color);
  border: none;
  border-radius: 10px;
  padding: 15px;
  font-size: 16px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.3s ease;
  box-shadow: 0 4px 15px var(--shadow-color);
  margin-top: 10px;
}

.auth-submit-btn:hover {
  transform: translateY(-2px);
  background: var(--gradient-btn-hover);
  box-shadow: 0 6px 20px var(--shadow-color);
}

.auth-footer {
  margin-top: 20px;
  text-align: center;
}

.auth-footer p {
  color: var(--text-color);
  font-size: 14px;
  margin: 8px 0;
}

.auth-footer a {
  color: var(--text-color);
  text-decoration: underline;
  cursor: pointer;
  transition: opacity 0.3s ease;
}

.auth-footer a:hover {
  opacity: 0.8;
}

/* Save Summary Button */
.save-btn {
  background: linear-gradient(45deg, #4caf50, #8bc34a);
  color: var(--text-color);
  padding: 12px 20px;
  border: none;
  border-radius: 25px;
  cursor: pointer;
  font-weight: 500;
  font-size: 14px;
  transition: transform 0.3s, background 0.3s;
  display: flex;
  align-items: center;
  gap: 8px;
}

.save-btn:hover {
  transform: translateY(-2px);
  background: linear-gradient(45deg, #45a049, #689f38);
}

.save-btn:disabled {
  opacity: 0.6;
  cursor: not-allowed;
  transform: none;
}

/* Saved Summaries Styles */
.saved-list {
  display: flex;
  flex-direction: column;
  gap: 15px;
}

.saved-summary-item {
  background: rgba(255, 255, 255, 0.1);
  border-radius: 12px;
  padding: 20px;
  border: 1px solid rgba(255, 255, 255, 0.2);
  transition: all 0.3s ease;
  backdrop-filter: blur(10px);
}

.saved-summary-item:hover {
  background: rgba(255, 255, 255, 0.15);
  transform: translateY(-2px);
  box-shadow: 0 4px 15px var(--shadow-color);
}

.summary-item-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 10px;
}

.summary-item-header h3 {
  color: var(--text-color);
  font-size: 16px;
  font-weight: 600;
  margin: 0;
  flex: 1;
  margin-right: 15px;
}

.summary-item-actions {
  display: flex;
  gap: 8px;
}

.view-summary-btn, .delete-summary-btn {
  background: var(--gradient-btn);
  color: var(--text-color);
  border: none;
  border-radius: 15px;
  padding: 6px 12px;
  font-size: 12px;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.3s ease;
  box-shadow: 0 2px 8px var(--shadow-color);
}

.view-summary-btn:hover {
  transform: translateY(-1px);
  background: var(--gradient-btn-hover);
}

.delete-summary-btn {
  background: linear-gradient(45deg, #ff6b6b, #ee5a52);
}

.delete-summary-btn:hover {
  background: linear-gradient(45deg, #ff5252, #d32f2f);
  transform: translateY(-1px);
}

.summary-item-meta {
  display: flex;
  gap: 15px;
  margin-bottom: 10px;
  font-size: 12px;
  color: rgba(255, 255, 255, 0.7);
}

.summary-preview {
  color: var(--text-color);
  font-size: 14px;
  line-height: 1.4;
  opacity: 0.9;
}

.no-summaries {
  text-align: center;
  padding: 40px 20px;
  color: var(--text-color);
  opacity: 0.7;
}

.no-summaries p {
  font-size: 16px;
  margin: 0;
}

/* Responsive Design for Firebase UI */
@media (max-width: 768px) {
  .user-status {
    top: 10px;
    left: 10px;
    padding: 10px;
  }

  .auth-btn, .logout-btn, .view-saved-btn {
    padding: 6px 12px;
    font-size: 11px;
  }

  .auth-content, .saved-content {
    width: 95%;
    margin: 5% auto;
    max-height: 90vh;
  }

  .login-prompt-content {
    width: 95%;
    margin: 10% auto;
    max-height: 85vh;
  }

  .login-prompt-body {
    padding: 30px 20px;
  }

  .login-prompt-icon {
    font-size: 48px;
  }

  .login-prompt-body h3 {
    font-size: 24px;
  }

  .login-prompt-benefits {
    gap: 15px;
    margin: 20px 0;
  }

  .benefit-item {
    min-width: 100px;
    padding: 12px;
  }

  .login-prompt-actions {
    flex-direction: column;
    gap: 15px;
    margin: 25px 0;
  }

  .login-prompt-btn {
    width: 100%;
    max-width: 250px;
    padding: 12px 25px;
    font-size: 14px;
  }

  .auth-header, .saved-header {
    padding: 15px;
  }

  .auth-header h2, .saved-header h2 {
    font-size: 18px;
  }

  .auth-body, .saved-body {
    padding: 20px;
    max-height: 300px;
  }

  .form-group input {
    padding: 10px 12px;
    font-size: 13px;
  }

  .auth-submit-btn {
    padding: 12px;
    font-size: 14px;
  }

  .saved-summary-item {
    padding: 15px;
  }

  .summary-item-header {
    flex-direction: column;
    gap: 10px;
  }

  .summary-item-header h3 {
    margin-right: 0;
    font-size: 14px;
  }

  .summary-item-actions {
    align-self: flex-end;
  }

  .view-summary-btn, .delete-summary-btn {
    padding: 5px 10px;
    font-size: 11px;
  }

  .summary-item-meta {
    flex-direction: column;
    gap: 5px;
    font-size: 11px;
  }

  .summary-preview {
    font-size: 13px;
  }
}

@media (max-width: 480px) {
  .user-status {
    top: 5px;
    left: 5px;
    padding: 8px;
  }

  .auth-btn, .logout-btn, .view-saved-btn {
    padding: 5px 10px;
    font-size: 10px;
  }

  .auth-content, .saved-content {
    width: 98%;
    margin: 2% auto;
  }

  .login-prompt-content {
    width: 98%;
    margin: 5% auto;
  }

  .login-prompt-body {
    padding: 20px 15px;
  }

  .login-prompt-icon {
    font-size: 40px;
  }

  .login-prompt-body h3 {
    font-size: 20px;
  }

  .login-prompt-benefits {
    flex-direction: column;
    gap: 10px;
    margin: 15px 0;
  }

  .benefit-item {
    min-width: auto;
    padding: 10px;
    flex-direction: row;
    justify-content: flex-start;
    gap: 10px;
  }

  .benefit-icon {
    font-size: 20px;
    margin-bottom: 0;
  }

  .login-prompt-actions {
    margin: 20px 0;
  }

  .login-prompt-btn {
    padding: 10px 20px;
    font-size: 13px;
  }

  .auth-body, .saved-body {
    padding: 15px;
  }

  .form-group input {
    padding: 8px 10px;
    font-size: 12px;
  }

  .auth-submit-btn {
    padding: 10px;
    font-size: 13px;
  }

  .saved-summary-item {
    padding: 12px;
  }

  .summary-item-header h3 {
    font-size: 13px;
  }

  .view-summary-btn, .delete-summary-btn {
    padding: 4px 8px;
    font-size: 10px;
  }
}