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

html, body {
  height: 100%;
  overflow: enabled;
  position: relative;
  width: 100%;
}

body {
  position: relative;
  z-index: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  color: #1d1d1f;
  display: flex;
  justify-content: center;
  align-items: center;
  flex-direction: column;
  min-height: 100vh;
  backdrop-filter: blur(8px);
  transition: color 1s ease, border-color 1s ease, backdrop-filter 1s ease;
  background: #f0f0f0;
}

body::before,
body::after {
  content: '';
  position: fixed;
  inset: 0;
  z-index: -1;
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
  filter: blur(10px);
  transform: scale(1.15);
  transition: opacity 1.5s ease, filter 1.5s ease, transform 1.5s ease;
}

body[data-theme="dark"]::after {
  opacity: 1;
  filter: blur(10px);
  transform: scale(1.15);
}

@supports (-webkit-touch-callout: none) {
  html, body {
    height: -webkit-fill-available;
  }
}

.container {
  position: relative;
  width: 100%;
  max-width: 450px;
  min-width: 450px;
  padding: 24px;
  margin: 0 auto;
  background: rgba(255 255 255 / 0.3);
  border: 1px solid rgba(230 230 230 / 0.6);
  box-shadow: 0 15px 30px rgba(0 0 0 / 0.1);
  border-radius: 50px;
  text-align: center;
  backdrop-filter: blur(18px);
  transition: background 1s ease, color 1s ease, border-color 1s ease;
  color: #1d1d1f;
  max-height: 100vh;
  overflow-y: auto;
  z-index: 1;
}

.container.guides {
  position: relative;
  width: 450px;
  height: 450px;
  padding: 24px;
  margin: auto;
  background: rgba(255 255 255 / 0.3);
  border: 1px solid rgba(230 230 230 / 0.6);
  box-shadow: 0 15px 30px rgba(0 0 0 / 0.1);
  border-radius: 50px;
  text-align: left;
  backdrop-filter: blur(18px);
  overflow-y: auto;
  scrollbar-width: none;
  -ms-overflow-style: none;
  box-sizing: border-box;
}

.container.guides::-webkit-scrollbar {
  display: none;
}

.container.guides h1,
.container.guides h2,
.container.guides h3 {
  text-align: center;
  padding: 24px 0;
}

.container.guides ul,
.container.guides ol {
  padding-left: 1.5rem;
  margin-bottom: 1.5rem;
  line-height: 1.6;
}

.container.guides li {
  margin-bottom: 0.5rem;
}

.container.guides p {
  margin-bottom: 1.2rem;
}

.container.guides a {
  color: #007aff;
  text-decoration: none;
  border-bottom: 2px solid transparent;
  transition: border 0.3s ease;
}

.container.guides a:hover {
  border-bottom: 2px solid #007aff;
}

body[data-theme="dark"] {
  background: #121212;
  color: #d0d0d0;
}

body[data-theme="dark"] .container {
  background: rgba(18 18 18 / 0.3);
  border: 1px solid rgba(160 160 160 / 0.6);
  box-shadow: 0 30px 60px rgba(0 0 0 / 0.35);
  backdrop-filter: blur(20px);
  color: #d0d0d0;
}

body[data-theme="dark"] .container.guides {
  background: rgba(18 18 18 / 0.3);
  border: 1px solid rgba(160 160 160 / 0.6);
  color: #f0f0f0;
}

body[data-theme="dark"] .container.guides ul li::marker,
body[data-theme="dark"] .container.guides ol li::marker {
  color: #f0f0f0;
}

.container h1 {
  font-size: 1.85rem;
  margin-bottom: 20px;
}

.card, .blue-card, .pink-card {
  display: block;
  width: 100%;
  max-width: 450px;
  margin: 12px auto;
  padding: 18px;
  border-radius: 35px;
  box-shadow: 0 30px 60px rgba(0 0 0 / 0.1);
  text-decoration: none;
  font-weight: 500;
  text-align: center;
  transition: transform 0.3s ease, opacity 0.3s ease, background 0.3s ease;
  backdrop-filter: blur(10px);
  opacity: 0.75;
  background: rgba(255 255 255 / 0.3);
  border: 1px solid rgba(255 255 255 / 0.3);
  color: #007aff;
}

.card:hover,
.blue-card:hover,
.pink-card:hover {
  transform: scale(1.05);
}

body[data-theme="dark"] .card {
  background: rgba(30 30 30 / 0.3);
  border: 1px solid rgba(255 255 255 / 0.06);
  color: #007aff;
}

.blue-card {
  background: rgba(0 122 255 / 0.65);
  color: #fff;
  border: 1px solid rgba(255 255 255 / 0.35);
}

.pink-card {
  background: rgba(255 133 193 / 0.65);
  color: #fff;
  border: 1px solid rgba(255 255 255 / 0.35);
}

.toggle {
  position: fixed;
  top: 20px;
  right: 20px;
  background: transparent;
  border: none;
  cursor: pointer;
  color: #1d1d1f;
  padding: 12px;
  transition: color 0.75s ease;
}

.toggle svg {
  width: 28px;
  height: 28px;
}

body[data-theme="dark"] .toggle {
  color: #e0e0e0;
}

@keyframes spin360 {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

.toggle.rotate svg {
  animation: spin360 1s ease forwards;
}

.social-links {
  margin-top: 18px;
  display: flex;
  justify-content: center;
  gap: 15px;
  transform: translateY(6px);
}

.social-links a {
  color: #808080;
  transition: color 0.3s ease, filter 0.3s ease;
}

.social-links a:hover {
  color: #007aff;
}

.social-links svg {
  width: 30px;
}

.container.signer .card {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  margin: 12px auto;
  padding: 18px;
  border-radius: 35px;
  box-shadow: 0 30px 60px rgba(0 0 0 / 0.1);
  background: rgba(255 255 255 / 0.3);
  border: 1px solid rgba(255 255 255 / 0.3);
  backdrop-filter: blur(10px);
  color: #1d1d1f;
  font-weight: 500;
}

body[data-theme="dark"] .container.signer .card {
  background: rgba(30 30 30 / 0.3);
  border: 1px solid rgba(255 255 255 / 0.06);
  color: #fff;
  font-weight: 500;
}

.container.signer .card label {
  flex: 1 1 auto;
  min-width: 0;
  white-space: normal;
  text-align: left;
  font-weight: 500;
  cursor: pointer;
  user-select: none;
  padding-right: 10px;
  color: inherit;
  transition: color 1s ease, border-color 1s ease;
}

.container.signer .card input[type="text"],
.container.signer .card input[type="number"],
.container.signer .card input[type="password"] {
  flex: 0 0 125px;
  text-align: right;
  padding: 6px 10px;
  border-radius: 12px;
  border: 2px solid rgba(0, 0, 0, 0.3);
  font-size: 1rem;
  background: transparent;
  color: inherit;
  min-width: 0;
  white-space: nowrap;
  transition: color 1s ease, border-color 1s ease;
  font-weight: 500;
}

body[data-theme="dark"] .container.signer .card input[type="text"],
body[data-theme="dark"] .container.signer .card input[type="number"],
body[data-theme="dark"] .container.signer .card input[type="password"] {
  border-color: rgba(255 255 255 / 0.3);
  font-weight: 500;
}

.container.signer .checkbox-group,
#advancedContent .checkbox-group {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 12px 18px;
  margin: 12px 0;
  border-radius: 35px;
  background: rgba(255 255 255 / 0.3);
  border: 1px solid rgba(230 230 230 / 0.6);
  box-shadow: 0 30px 60px rgba(0 0 0 / 0.1);
  backdrop-filter: blur(10px);
  color: #1d1d1f;
  user-select: none;
  font-weight: 500;
  transition: color 1s ease, border-color 1s ease;
}

body[data-theme="dark"] .container.signer .checkbox-group,
body[data-theme="dark"] #advancedContent .checkbox-group {
  background: rgba(30 30 30 / 0.3);
  border: 1px solid rgba(255 255 255 / 0.06);
  color: #fff;
  font-weight: 500;
}

.container.signer .checkbox-group label,
#advancedContent .checkbox-group label {
  flex: 1;
  text-align: left;
  padding-right: 12px;
  white-space: normal;
  font-weight: 500;
  color: inherit;
  user-select: none;
  transition: color 1s ease, border-color 1s ease;
}

.container.signer .checkbox-group input[type="checkbox"],
#advancedContent .checkbox-group input[type="checkbox"] {
  flex: 0 0 auto;
  margin-left: auto;
  cursor: pointer;
  transition: color 1s ease, border-color 1s ease;
  font-weight: 500;
}

.container.signer .card:not(.blue-card):hover {
  transform: none !important;
  opacity: 0.75 !important;
  cursor: default !important;
  transition: opacity 0.3s ease;
}

#advancedContent {
  display: flex;
  flex-direction: column;
  gap: 10px;
  height: 0;
  transform-origin: top;
  transform: scaleY(0);
  overflow: hidden;
  padding-top: 0;
  padding-bottom: 0;
  padding-left: 24px;
  padding-right: 24px;
  border-radius: 50px;
  background: rgba(255, 255, 255, 0.3);
  border: 1px solid rgba(230, 230, 230, 0.6);
  box-shadow: 0 15px 30px rgba(0, 0, 0, 0.1);
  backdrop-filter: blur(18px);
  color: #1d1d1f;
  box-sizing: border-box;
  transition:
    height 0.4s ease,
    transform 0.4s ease,
    opacity 0.3s ease,
    padding-top 0.4s ease,
    padding-bottom 0.4s ease,
    background 1s ease,
    color 1s ease,
    border-color 1s ease;
  will-change: height, transform, opacity, padding;
  font-weight: 500;
}

#advancedContent::-webkit-scrollbar {
  display: none;
}

#advancedContent {
  -ms-overflow-style: none;
  scrollbar-width: none;
}

body[data-theme="dark"] #advancedContent {
  background: rgba(18, 18, 18, 0.3);
  border: 1px solid rgba(160, 160, 160, 0.6);
  color: #fff;
  box-shadow: 0 30px 60px rgba(0, 0, 0, 0.35);
  backdrop-filter: blur(20px);
}

#advancedContent label,
#advancedContent input,
#advancedContent a,
#advancedContent .checkbox-group label {
  color: inherit !important;
}

#advancedContent a {
  text-decoration: none;
  border-bottom: none;
  cursor: pointer;
}

#advancedContent.expanded {
  height: 320px;
  transform: scaleY(1);
  opacity: 0.75;
  padding-top: 18px;
  padding-bottom: 18px;
  overflow: auto;
}

.chevron-toggle {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: transparent;
  border: none;
  color: inherit;
  font-weight: 500;
  font-size: 1rem;
  cursor: pointer;
  padding: 8px 12px;
  border-radius: 25px;
  user-select: none;
  transition: color 0.75s ease;
}

.chevron {
  transition: transform 0.3s ease;
  transform-origin: center;
}

.chevron-toggle[aria-expanded="true"] .chevron {
  transform: rotate(180deg);
}

#advancedContent .checkbox-group {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 12px 18px;
  border-radius: 35px;
  background: rgba(255 255 255 / 0.3);
  border: 1px solid rgba(230 230 230 / 0.6);
  box-shadow: 0 30px 60px rgba(0 0 0 / 0.1);
  backdrop-filter: blur(10px);
  color: inherit;
  margin: 12px 0;
}

body[data-theme="dark"] #advancedContent .checkbox-group {
  background: rgba(30 30 30 / 0.3);
  border: 1px solid rgba(255 255 255 / 0.06);
  color: #fff;
}

#advancedContent .checkbox-group label {
  flex: 1;
  text-align: left;
  padding-right: 12px;
  white-space: normal;
  font-weight: 500;
  color: inherit;
  user-select: none;
}

#advancedContent .checkbox-group input[type="checkbox"] {
  flex: 0 0 auto;
  cursor: pointer;
  margin-left: auto;
}

.file-card {
  align-items: center;
}

.file-wrapper {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  padding: 0.5rem 0;
  position: relative;
}

.file-wrapper input[type="file"] {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  border: 0;
}

.custom-file-btn {
  padding: 0.4rem 0.8rem;
  border: 1px solid currentColor;
  border-radius: 0.5rem;
  background: transparent;
  color: inherit;
  font-size: 0.9rem;
  cursor: pointer;
  transition: background 0.2s;
}

.file-name {
  flex-grow: 1;
  font-size: 0.9rem;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.custom-checkbox {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.custom-checkbox input[type="checkbox"] {
  position: absolute;
  opacity: 0;
  cursor: pointer;
  height: 20px;
  width: 20px;
  margin-left: auto;
}

.custom-checkbox .checkmark {
  position: relative;
  height: 18px;
  width: 18px;
  background-color: transparent;
  border: 2px solid #007aff;
  border-radius: 5px;
  margin-left: auto;
  box-sizing: border-box;
  padding: 3px;
  margin-top: -4px; /* move checkbox up */
}

.custom-checkbox input[type="checkbox"]:checked + .checkmark::after {
  content: "";
  position: absolute;
  left: 4px;
  top: 0px;
  width: 5px;
  height: 9px;
  border: solid #007aff;
  border-width: 0 2px 2px 0;
  transform: rotate(45deg);
}