/* ----- Basic Page & Theme Styles ----- */
body {
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  background-color: #e0f7fa; 
  color: #333;
  margin: 20px;
  display: flex;
  flex-direction: column;
  align-items: center;
  transition: background-color 0.5s, color 0.5s;
}
body.dark-mode {
  background-color: #1e293b;
  color: #f0f0f0;
}

h1 {
  color: #00796b;
  text-align: center;
  margin-bottom: 0.5em;
  transition: color 0.5s;
}
body.dark-mode h1 {
  color: #a5f3fc;
}

/* Theme toggle button under heading */
#themeToggleButton {
  margin: 0 auto 1em;
  padding: 10px 20px;
  font-size: 16px;
  border-radius: 6px;
  border: none;
  background-color: #00796b;
  color: #fff;
  cursor: pointer;
  transition: background-color 0.3s, color 0.5s;
}
body.dark-mode #themeToggleButton {
  background-color: #a5f3fc;
  color: #1e293b;
}
#themeToggleButton:hover {
  background-color: #004d40;
}
body.dark-mode #themeToggleButton:hover {
  background-color: #7dd3fc;
}

/* Info Toggle Button */
#infoToggleButton {
  margin: 0 auto 1em;
  padding: 8px 16px;
  font-size: 14px;
  border-radius: 6px;
  border: none;
  background-color: #80cbc4;
  color: #004d40;
  cursor: pointer;
  transition: background-color 0.3s, color 0.5s;
}
#infoToggleButton:hover {
  background-color: #00796b;
  color: white;
}

/* Modal Overlay for Info */
#infoOverlay {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.6);
  backdrop-filter: blur(5px);
  z-index: 2000;
}
#infoModal {
  background: #fff;
  max-width: 600px;
  width: 90%;
  padding: 20px;
  margin: 100px auto;
  border-radius: 8px;
  position: relative;
  color: #004d40;
}
body.dark-mode #infoModal {
  background: #2d3748;
  color: #f0f0f0;
}
#closeInfo {
  position: absolute;
  top: 10px;
  right: 10px;
  cursor: pointer;
  background: #00796b;
  color: #fff;
  border: none;
  padding: 4px 8px;
  border-radius: 4px;
  font-size: 12px;
  transition: background 0.3s;
}
#closeInfo:hover {
  background: #004d40;
}

/* ----- Container for tools & pinned preview box ----- */
.calculator-container {
  display: flex;
  flex-direction: row;
  max-width: 900px;
  width: 95%;
  margin-bottom: 25px;
  align-items: flex-start;
  justify-content: space-between;
}
.calculator-tools {
  width: calc(60% - 20px);
  display: flex;
  flex-direction: column;
  margin-right: 20px;
}

.calculator-section {
  background-color: #b2dfdb;
  padding: 25px;
  border-radius: 12px;
  box-shadow: 0 5px 15px rgba(0,0,0,0.1);
  margin-bottom: 20px;
  width: 100%;
  box-sizing: border-box;
  transition: background-color 0.5s;
}
body.dark-mode .calculator-section {
  background-color: #243045;
  box-shadow: 0 5px 15px rgba(255,255,255,0.1);
}

.calculator-section h2 {
  color: #00796b;
  margin-top: 0;
  margin-bottom: 20px;
  text-align: center;
  transition: color 0.5s;
}
body.dark-mode .calculator-section h2 {
  color: #a5f3fc;
}

.input-group {
  margin-bottom: 20px;
}
.input-group label {
  display: block;
  margin-bottom: 8px;
  font-weight: bold;
  color: #004d40;
  transition: color 0.5s;
}
body.dark-mode .input-group label {
  color: #cbd5e1;
}

.input-group input[type="number"],
.input-group select,
.input-group input[type="text"] {
  width: calc(100% - 22px);
  padding: 12px;
  border: 2px solid #80cbc4;
  border-radius: 8px;
  font-size: 16px;
  transition: border-color 0.3s, background-color 0.5s, color 0.5s;
  background-color: white;
  color: #333;
}
body.dark-mode .input-group input[type="number"],
body.dark-mode .input-group select,
body.dark-mode .input-group input[type="text"] {
  border-color: #64748b;
  background-color: #2d3748;
  color: #f0f0f0;
}
.input-group select {
  appearance: none;
  -webkit-appearance: none;
  -moz-appearance: none;
  background-image: url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" fill="none" stroke="%23000000" stroke-width="1" viewBox="0 0 24 24"><path d="M7 10l5 5 5-5"/></svg>');
  background-repeat: no-repeat;
  background-position: calc(100% - 10px) center;
  transition: background-image 0.5s;
}
body.dark-mode .input-group select {
  background-image: url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" fill="none" stroke="%23f0f0f0" stroke-width="1" viewBox="0 0 24 24"><path d="M7 10l5 5 5-5"/></svg>');
}
.input-group input:focus,
.input-group select:focus {
  border-color: #00796b;
  outline: none;
  box-shadow: 0 0 8px rgba(0,121,107,0.5);
}
body.dark-mode .input-group input:focus,
body.dark-mode .input-group select:focus {
  border-color: #a5f3fc;
  box-shadow: 0 0 8px rgba(165,243,252,0.5);
}

button {
  background-color: #00796b;
  color: white;
  border: none;
  padding: 12px 25px;
  border-radius: 8px;
  font-size: 18px;
  cursor: pointer;
  transition: background-color 0.3s, color 0.5s;
  display: block;
  margin: 15px auto 0;
}
body.dark-mode button {
  background-color: #a5f3fc;
  color: #1e293b;
}
button:hover {
  background-color: #004d40;
}
body.dark-mode button:hover {
  background-color: #7dd3fc;
}

#result1, #result2 {
  background-color: #c8e6c9;
  padding: 15px;
  border-radius: 8px;
  margin-top: 20px;
  font-size: 16px;
  font-weight: bold;
  text-align: center;
  border: 2px solid #a5d6a7;
  position: relative;
  transition: background-color 0.5s, color 0.5s, border-color 0.5s;
  min-height: 50px;
}
body.dark-mode #result1, body.dark-mode #result2 {
  background-color: #2e3a4d;
  color: #f0f0f0;
  border-color: #64748b;
}
#result1 span, #result2 span {
  color: #00695c;
  transition: color 0.5s;
}
body.dark-mode #result1 span, body.dark-mode #result2 span {
  color: #a5f3fc;
}

@keyframes highlight {
  from { background-color: rgba(255,255,255,0.2); }
  to { background-color: transparent; }
}
.result-highlight {
  animation: highlight 0.8s ease-out;
}

.copy-button {
  position: absolute;
  top: 8px;
  right: 8px;
  background-color: rgba(0,121,107,0.7);
  color: white;
  border: none;
  padding: 5px 8px;
  border-radius: 5px;
  font-size: 12px;
  cursor: pointer;
  opacity: 0.8;
  transition: opacity 0.3s, background-color 0.3s, color 0.5s;
}
body.dark-mode .copy-button {
  background-color: rgba(165,243,252,0.7);
  color: #1e293b;
}
.copy-button:hover {
  opacity: 1;
  background-color: #00695c;
}
body.dark-mode .copy-button:hover {
  background-color: #7dd3fc;
}

/*
   For screens > 768px, pin the preview box.
   For 768px or below, it stays in normal flow.
*/
#aspectRatioPreview {
  background-color: #b2dfdb;
  border-radius: 12px;
  box-shadow: 0 5px 15px rgba(0,0,0,0.1);
  margin-top: 0;
  margin-bottom: 0;
  box-sizing: border-box;
  overflow: hidden;
  display: flex;
  justify-content: center;
  align-items: center;
  font-size: 0.8em;
  line-height: 1.4;
  color: #004d40;
  text-align: center;
  font-weight: bold;
  padding: 20px;
  transition: all 0.5s ease;
  width: 200px;
  height: 200px;
}
body.dark-mode #aspectRatioPreview {
  background-color: #243045;
  color: #a5f3fc;
  box-shadow: 0 5px 15px rgba(255,255,255,0.1);
  outline: 1px solid #a5f3fc;
}
@media (min-width: 769px) {
  #aspectRatioPreview {
    position: fixed;
    top: 50%;
    left: 70%;
    transform: translate(-50%, -50%);
    z-index: 999;
  }
}

.ratio-filter-buttons {
  display: flex;
  justify-content: center;
  margin-bottom: 15px;
}
.ratio-button {
  background-color: #80cbc4;
  color: #004d40;
  border: none;
  padding: 8px 15px;
  border-radius: 6px;
  font-size: 16px;
  cursor: pointer;
  margin: 0 5px;
  transition: background-color 0.3s, color 0.5s;
}
body.dark-mode .ratio-button {
  background-color: #334155;
  color: #f0f0f0;
}
.ratio-button:hover {
  background-color: #00796b;
  color: white;
}
body.dark-mode .ratio-button:hover {
  background-color: #a5f3fc;
  color: #1e293b;
}
.ratio-button:focus {
  outline: none;
  box-shadow: 0 0 6px rgba(0,121,107,0.5);
}
body.dark-mode .ratio-button:focus {
  box-shadow: 0 0 6px rgba(165,243,252,0.5);
}
.ratio-button.active {
  background-color: #00796b;
  color: white;
}
body.dark-mode .ratio-button.active {
  background-color: #a5f3fc;
  color: #1e293b;
}

.flip-button {
  background-color: #00796b;
  color: white;
  border: none;
  padding: 6px 10px;
  border-radius: 4px;
  font-size: 14px;
  cursor: pointer;
  margin-top: 5px;
  transition: background-color 0.3s, color 0.5s;
}
body.dark-mode .flip-button {
  background-color: #a5f3fc;
  color: #1e293b;
}
.flip-button:hover {
  background-color: #004d40;
}
body.dark-mode .flip-button:hover {
  background-color: #7dd3fc;
}

.saved-ratios-group {
  margin-bottom: 20px;
}
.saved-ratios-group label {
  font-weight: bold;
  margin-bottom: 5px;
  display: block;
}
.saved-ratios-group select {
  width: 100%;
  padding: 12px;
  border: 2px solid #80cbc4;
  border-radius: 8px;
  font-size: 16px;
  background-color: white;
  color: #333;
  margin-bottom: 5px;
  transition: background-color 0.5s, color 0.5s;
}
body.dark-mode .saved-ratios-group select {
  background-color: #2d3748;
  color: #f0f0f0;
  border-color: #64748b;
}

/* For 768px or below, put everything in normal flow */
@media (max-width: 768px) {
  #aspectRatioPreview {
    position: static;
    margin-top: 20px;
    width: 90%;
    max-width: 300px;
    transform: none;
  }
  .calculator-container {
    flex-direction: column;
    align-items: center;
  }
  .calculator-tools {
    width: 100%;
    margin-right: 0;
  }

  /* Floating scroll-to-preview button (for mobile only) */
  #scrollPreviewBtn {
    display: block;
    position: fixed;
    bottom: 20px;
    right: 20px;
    padding: 6px 10px;
    font-size: 12px;
    border-radius: 4px;
    border: none;
    background-color: rgba(0,121,107,0.2);
    color: #004d40;
    cursor: pointer;
    z-index: 1500;
    transition: background-color 0.3s, opacity 0.3s, color 0.5s;
  }
  #scrollPreviewBtn:hover {
    background-color: rgba(0,121,107,0.4);
    opacity: 0.8;
  }
  body.dark-mode #scrollPreviewBtn {
    background-color: rgba(165,243,252,0.2);
    color: #1e293b;
  }
  body.dark-mode #scrollPreviewBtn:hover {
    background-color: rgba(165,243,252,0.4);
    opacity: 0.8;
  }
}
@media (min-width: 769px) {
  #scrollPreviewBtn {
    display: none;
  }
}

/* Drop Zone styling for third tool */
#dropZone {
  box-sizing: border-box;
  width: 100%;
  padding: 20px;
  border: 2px dashed #80cbc4;
  border-radius: 8px;
  text-align: center;
  color: #004d40;
  cursor: pointer;
  transition: background-color 0.3s;
  margin-bottom: 20px;
}
body.dark-mode #dropZone {
  border-color: #64748b;
  color: #f0f0f0;
}
#dropZone:hover {
  background-color: #c8e6c9;
}
body.dark-mode #dropZone:hover {
  background-color: #334155;
}