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

:root {
  --bg-start: #f8f9fa;
  --bg-end: #e9ecef;
  --surface: rgba(255, 255, 255, 0.85);
  --surface-border: rgba(0, 0, 0, 0.08);
  --text-primary: #1d1d1f;
  --text-secondary: #86868b;
  --text-muted: #adadb2;
  --border: rgba(0, 0, 0, 0.1);
  --accent: #007aff;
  --accent-hover: #0056b3;
  --accent-bg: rgba(0, 122, 255, 0.06);
  --accent-border: rgba(0, 122, 255, 0.2);
  --success: #34c759;
  --success-bg: rgba(52, 199, 89, 0.08);
  --success-border: rgba(52, 199, 89, 0.25);
  --error: #ff3b30;
  --error-bg: rgba(255, 59, 48, 0.08);
  --error-border: rgba(255, 59, 48, 0.2);
  --radius-lg: 24px;
  --radius-md: 16px;
  --radius-sm: 12px;
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.04);
  --shadow-md: 0 8px 30px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 20px 40px rgba(0, 0, 0, 0.08);
  --blur: 20px;
  --transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

body[data-theme="dark"] {
  --bg-start: #0f0f10;
  --bg-end: #000000;
  --surface: rgba(22, 22, 23, 0.8);
  --surface-border: rgba(255, 255, 255, 0.08);
  --text-primary: #f5f5f7;
  --text-secondary: #98989d;
  --text-muted: #636366;
  --border: rgba(255, 255, 255, 0.12);
  --accent: #0a84ff;
  --accent-hover: #409cff;
  --accent-bg: rgba(10, 132, 255, 0.12);
  --accent-border: rgba(10, 132, 255, 0.3);
  --success: #30d158;
  --success-bg: rgba(48, 209, 88, 0.12);
  --success-border: rgba(48, 209, 88, 0.35);
  --error: #ff453a;
  --error-bg: rgba(255, 69, 58, 0.12);
  --error-border: rgba(255, 69, 58, 0.35);
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.2);
  --shadow-md: 0 8px 30px rgba(0, 0, 0, 0.3);
  --shadow-lg: 0 20px 40px rgba(0, 0, 0, 0.4);
}

html {
  height: 100%;
}

body {
  min-height: 100%;
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Display", "SF Pro Text", "Helvetica Neue", Helvetica, Arial, sans-serif;
  background: radial-gradient(circle at 50% 0%, var(--bg-start) 0%, var(--bg-end) 100%) no-repeat;
  background-attachment: fixed;
  color: var(--text-primary);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  transition: background 0.3s ease, color 0.3s ease;
}

/* Page Layout */
.page {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 60px 20px 40px;
}

.container {
  width: 100%;
  max-width: 480px;
  opacity: 0;
  transform: translateY(15px);
  animation: fadeIn 0.6s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

@keyframes fadeIn {
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Header */
.header {
  text-align: center;
  margin-bottom: 32px;
}

.header-icon {
  width: 64px;
  height: 64px;
  margin: 0 auto 16px;
  background: var(--accent-bg);
  border: 1px solid var(--accent-border);
  border-radius: 18px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent);
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
}

.header-icon svg {
  width: 32px;
  height: 32px;
}

.header:hover .header-icon {
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(10, 132, 255, 0.2);
}

.header h1 {
  font-size: 2rem;
  font-weight: 700;
  letter-spacing: -0.03em;
  margin-bottom: 6px;
  background: linear-gradient(135deg, var(--text-primary) 30%, var(--text-secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.header p {
  font-size: 0.95rem;
  color: var(--text-secondary);
  font-weight: 400;
}

/* Glassmorphic Card */
.card {
  background: var(--surface);
  backdrop-filter: blur(var(--blur));
  -webkit-backdrop-filter: blur(var(--blur));
  border: 1px solid var(--surface-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  padding: 32px;
  transition: var(--transition);
}

/* Forms */
.field {
  margin-bottom: 24px;
}

.field-label {
  display: block;
  font-size: 0.85rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 8px;
  color: var(--text-secondary);
}

/* Custom File Upload Card */
.file-upload-card {
  position: relative;
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 18px 20px;
  border: 2px dashed var(--border);
  border-radius: var(--radius-md);
  background: rgba(0, 0, 0, 0.015);
  cursor: pointer;
  overflow: hidden;
  transition: var(--transition);
}

body[data-theme="dark"] .file-upload-card {
  background: rgba(255, 255, 255, 0.015);
}

.file-upload-card:hover {
  border-color: var(--accent);
  background: var(--accent-bg);
}

.file-upload-card:focus-within {
  border-color: var(--accent);
  box-shadow: 0 0 0 4px var(--accent-bg);
  outline: none;
}

.file-upload-card input[type="file"] {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  opacity: 0;
  cursor: pointer;
}

.file-upload-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  border-radius: 12px;
  background: var(--border);
  color: var(--text-secondary);
  flex-shrink: 0;
  transition: var(--transition);
}

.file-upload-card:hover .file-upload-icon {
  background: var(--accent);
  color: #ffffff;
}

.file-upload-info {
  display: flex;
  flex-direction: column;
  min-width: 0;
}

.file-upload-title {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-primary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  transition: var(--transition);
}

.file-upload-desc {
  font-size: 0.78rem;
  color: var(--text-secondary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  margin-top: 2px;
}

/* File selected state */
.file-upload-card.has-file {
  border-style: solid;
  border-color: var(--success);
  background: var(--success-bg);
}

.file-upload-card.has-file .file-upload-icon {
  background: var(--success);
  color: #ffffff;
}

.file-upload-card.has-file .file-upload-title {
  color: var(--text-primary);
}

/* Password Input */
.input-text-wrapper {
  position: relative;
}

.field input[type="text"],
.field input[type="password"] {
  width: 100%;
  padding: 14px 16px;
  font-size: 0.95rem;
  font-family: inherit;
  color: var(--text-primary);
  background: rgba(0, 0, 0, 0.02);
  border: 1.5px solid var(--border);
  border-radius: var(--radius-md);
  transition: var(--transition);
}

body[data-theme="dark"] .field input[type="text"],
body[data-theme="dark"] .field input[type="password"] {
  background: rgba(255, 255, 255, 0.02);
}

.field input[type="text"]:focus,
.field input[type="password"]:focus {
  outline: none;
  background: var(--surface);
  border-color: var(--accent);
  box-shadow: 0 0 0 4px var(--accent-bg);
}

.field input::placeholder {
  color: var(--text-muted);
}

/* Buttons */
.btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  margin-top: 28px;
  padding: 14px 24px;
  font-size: 1rem;
  font-weight: 600;
  font-family: inherit;
  color: #ffffff;
  background: linear-gradient(135deg, var(--accent) 0%, #0056b3 100%);
  border: none;
  border-radius: var(--radius-md);
  cursor: pointer;
  box-shadow: 0 4px 16px rgba(0, 122, 255, 0.25);
  transition: var(--transition);
}

.btn:hover:not(:disabled) {
  transform: translateY(-1px);
  box-shadow: 0 6px 20px rgba(0, 122, 255, 0.35);
}

.btn:active:not(:disabled) {
  transform: translateY(1px);
}

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  box-shadow: none;
}

.btn-link {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  padding: 14px 24px;
  font-size: 1rem;
  font-weight: 600;
  font-family: inherit;
  text-align: center;
  text-decoration: none;
  color: #ffffff;
  background: linear-gradient(135deg, var(--accent) 0%, #0056b3 100%);
  border-radius: var(--radius-md);
  box-shadow: 0 4px 16px rgba(0, 122, 255, 0.25);
  transition: var(--transition);
}

.btn-link:hover {
  transform: translateY(-1px);
  box-shadow: 0 6px 20px rgba(0, 122, 255, 0.35);
}

.btn-secondary {
  display: block;
  width: 100%;
  margin-top: 12px;
  padding: 12px 24px;
  font-size: 0.95rem;
  font-weight: 500;
  font-family: inherit;
  color: var(--text-secondary);
  background: transparent;
  border: 1.5px solid var(--border);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: var(--transition);
}

.btn-secondary:hover {
  color: var(--text-primary);
  border-color: var(--text-secondary);
  background: rgba(0, 0, 0, 0.02);
}

body[data-theme="dark"] .btn-secondary:hover {
  background: rgba(255, 255, 255, 0.02);
}

/* Advanced Accordion */
.divider {
  border: none;
  border-top: 1px solid var(--border);
  margin: 24px 0;
}

.advanced-toggle {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  padding: 4px 0;
  background: none;
  border: none;
  font-size: 0.9rem;
  font-weight: 600;
  font-family: inherit;
  color: var(--text-secondary);
  cursor: pointer;
  transition: var(--transition);
}

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

.advanced-toggle .chevron {
  display: flex;
  transition: transform 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

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

/* Smooth Accordion Height Animation */
.advanced-wrapper {
  display: grid;
  grid-template-rows: 0fr;
  transition: grid-template-rows 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.advanced-wrapper.expanded {
  grid-template-rows: 1fr;
}

.advanced-inner {
  overflow: hidden;
  min-height: 0;
}

.advanced-container {
  padding-top: 20px;
}

/* Custom styled Interactive Checkboxes */
.checkbox-list {
  display: grid;
  grid-template-columns: 1fr;
  gap: 10px;
  margin-top: 16px;
}

@media (min-width: 400px) {
  .checkbox-list {
    grid-template-columns: repeat(2, 1fr);
  }
}

.checkbox-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 14px;
  border: 1.5px solid var(--border);
  border-radius: var(--radius-sm);
  background: rgba(0, 0, 0, 0.01);
  font-size: 0.82rem;
  font-weight: 500;
  cursor: pointer;
  user-select: none;
  transition: var(--transition);
}

body[data-theme="dark"] .checkbox-item {
  background: rgba(255, 255, 255, 0.01);
}

.checkbox-item:hover {
  border-color: var(--text-secondary);
}

.checkbox-item input[type="checkbox"] {
  width: 18px;
  height: 18px;
  accent-color: var(--accent);
  cursor: pointer;
  flex-shrink: 0;
  border-radius: 4px;
}

.checkbox-item:has(input[type="checkbox"]:checked) {
  border-color: var(--accent);
  background: var(--accent-bg);
  color: var(--accent);
}

/* Float Theme Toggle */
.toggle {
  position: fixed;
  top: 20px;
  right: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  padding: 0;
  background: var(--surface);
  backdrop-filter: blur(var(--blur));
  -webkit-backdrop-filter: blur(var(--blur));
  border: 1px solid var(--surface-border);
  border-radius: 50%;
  color: var(--text-primary);
  cursor: pointer;
  box-shadow: var(--shadow-md);
  z-index: 999;
  transition: var(--transition);
}

.toggle:hover {
  transform: scale(1.05);
  box-shadow: var(--shadow-lg);
}

.toggle svg {
  width: 20px;
  height: 20px;
}

/* Modal Overlay & Card with Transitions */
.overlay {
  display: flex;
  opacity: 0;
  pointer-events: none;
  position: fixed;
  inset: 0;
  z-index: 1000;
  background: rgba(0, 0, 0, 0.2);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  align-items: center;
  justify-content: center;
  padding: 20px;
  transition: opacity 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.overlay.show {
  opacity: 1;
  pointer-events: auto;
}

.modal {
  width: 100%;
  max-width: 380px;
  background: var(--surface);
  backdrop-filter: blur(var(--blur));
  -webkit-backdrop-filter: blur(var(--blur));
  border: 1px solid var(--surface-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  padding: 32px;
  text-align: center;
  transform: scale(0.92);
  transition: transform 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.overlay.show .modal {
  transform: scale(1);
}

.modal-icon {
  width: 56px;
  height: 56px;
  margin: 0 auto 16px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
}

.modal.success .modal-icon {
  background: var(--success-bg);
  border: 1px solid var(--success-border);
  color: var(--success);
}

.modal.error .modal-icon {
  background: var(--error-bg);
  border: 1px solid var(--error-border);
  color: var(--error);
}

.modal h2 {
  font-size: 1.35rem;
  font-weight: 700;
  margin-bottom: 8px;
  letter-spacing: -0.02em;
}

.modal p {
  font-size: 0.95rem;
  color: var(--text-secondary);
  margin-bottom: 24px;
  line-height: 1.45;
}

.modal p.error {
  color: var(--error);
}

.modal p.success {
  color: var(--success);
}

/* Install View Styles */
.install-info {
  text-align: center;
}

.install-info h1 {
  font-size: 1.75rem;
  font-weight: 700;
  letter-spacing: -0.03em;
  margin-bottom: 12px;
}

.install-meta {
  font-size: 0.95rem;
  color: var(--text-secondary);
  margin-bottom: 8px;
  padding: 6px 12px;
  background: rgba(0, 0, 0, 0.02);
  border-radius: 8px;
  display: inline-block;
}

body[data-theme="dark"] .install-meta {
  background: rgba(255, 255, 255, 0.02);
}

.install-meta b {
  color: var(--text-primary);
  font-weight: 600;
}

.install-info .btn-link {
  margin-top: 24px;
}