/* ============================================================
   IPA Installer — iOS 26 Liquid Glass Design
   Light + Dark theme via prefers-color-scheme
   ============================================================ */

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

:root {
  --accent: #007AFF;
  --accent-hover: #0066D6;
  --green: #30D158;
  --red: #FF453A;
  --orange: #FF9F0A;

  /* Light theme (default) */
  --bg: #f2f2f7;
  --bg-secondary: #e5e5ea;
  --surface: rgba(255, 255, 255, 0.72);
  --surface-solid: #ffffff;
  --surface-elevated: rgba(255, 255, 255, 0.85);
  --text: #1c1c1e;
  --text-secondary: #8e8e93;
  --text-tertiary: #aeaeb2;
  --separator: rgba(60, 60, 67, 0.12);
  --fill: rgba(120, 120, 128, 0.08);
  --shadow: 0 2px 16px rgba(0, 0, 0, 0.08), 0 0 1px rgba(0, 0, 0, 0.05);
  --shadow-elevated: 0 8px 40px rgba(0, 0, 0, 0.12), 0 0 1px rgba(0, 0, 0, 0.06);
  --glass-border: rgba(255, 255, 255, 0.5);
  --icon-shadow: 0 4px 20px rgba(0, 0, 0, 0.15);
  --radius: 20px;
  --radius-sm: 14px;
  --radius-xs: 10px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --accent: #0A84FF;
    --accent-hover: #409CFF;
    --bg: #000000;
    --bg-secondary: #1c1c1e;
    --surface: rgba(44, 44, 46, 0.65);
    --surface-solid: #1c1c1e;
    --surface-elevated: rgba(58, 58, 60, 0.72);
    --text: #ffffff;
    --text-secondary: #8e8e93;
    --text-tertiary: #636366;
    --separator: rgba(84, 84, 88, 0.36);
    --fill: rgba(120, 120, 128, 0.18);
    --shadow: 0 2px 16px rgba(0, 0, 0, 0.3), 0 0 1px rgba(0, 0, 0, 0.2);
    --shadow-elevated: 0 8px 40px rgba(0, 0, 0, 0.5), 0 0 1px rgba(0, 0, 0, 0.3);
    --glass-border: rgba(255, 255, 255, 0.08);
    --icon-shadow: 0 4px 20px rgba(0, 0, 0, 0.4);
  }
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'SF Pro Display', 'SF Pro Text',
    'Helvetica Neue', Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  display: flex;
  flex-direction: column;
}

/* ============ Header ============ */

.header {
  text-align: center;
  padding: 52px 20px 12px;
}

.header-logo {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 12px;
}

.header-logo svg {
  width: 36px;
  height: 36px;
  color: var(--accent);
}

.header h1 {
  font-size: 32px;
  font-weight: 700;
  letter-spacing: -0.5px;
  color: var(--text);
}

.header p {
  color: var(--text-secondary);
  font-size: 17px;
  max-width: 460px;
  margin: 0 auto;
  font-weight: 400;
}

/* ============ Main Container ============ */

.container {
  max-width: 580px;
  margin: 0 auto;
  padding: 20px;
  flex: 1;
  width: 100%;
}

/* ============ Glass Card ============ */

.glass-card {
  background: var(--surface);
  backdrop-filter: blur(40px) saturate(180%);
  -webkit-backdrop-filter: blur(40px) saturate(180%);
  border-radius: var(--radius);
  border: 1px solid var(--glass-border);
  box-shadow: var(--shadow);
  padding: 32px;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

/* ============ Upload Zone ============ */

.upload-zone {
  position: relative;
  border: 2px dashed var(--separator);
  border-radius: var(--radius);
  padding: 56px 40px;
  text-align: center;
  cursor: pointer;
  transition: all 0.25s ease;
  background: var(--surface);
  backdrop-filter: blur(40px) saturate(180%);
  -webkit-backdrop-filter: blur(40px) saturate(180%);
}

.upload-zone:hover {
  border-color: var(--accent);
  background: var(--surface-elevated);
  box-shadow: var(--shadow);
}

.upload-zone.drag-over {
  border-color: var(--accent);
  background: var(--surface-elevated);
  box-shadow: var(--shadow-elevated);
  transform: scale(1.01);
}

.upload-icon-wrap {
  width: 72px;
  height: 72px;
  margin: 0 auto 20px;
  border-radius: 18px;
  background: var(--fill);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background 0.25s ease;
}

.upload-zone:hover .upload-icon-wrap {
  background: rgba(0, 122, 255, 0.1);
}

.upload-icon-wrap svg {
  width: 32px;
  height: 32px;
  color: var(--accent);
}

.upload-zone h2 {
  font-size: 20px;
  font-weight: 600;
  margin-bottom: 6px;
  letter-spacing: -0.2px;
}

.upload-zone p {
  color: var(--text-secondary);
  font-size: 15px;
}

.browse-link {
  color: var(--accent);
  font-weight: 600;
  cursor: pointer;
}

.upload-hint {
  margin-top: 12px;
  font-size: 13px;
  color: var(--text-tertiary);
}

.file-input {
  display: none;
}

/* ============ Progress ============ */

.progress-section {
  display: none;
  margin-top: 24px;
}

.progress-section.active {
  display: block;
  animation: fadeIn 0.3s ease;
}

.progress-card {
  background: var(--surface);
  backdrop-filter: blur(40px) saturate(180%);
  -webkit-backdrop-filter: blur(40px) saturate(180%);
  border-radius: var(--radius);
  border: 1px solid var(--glass-border);
  box-shadow: var(--shadow);
  padding: 28px;
}

.progress-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 16px;
}

.progress-filename {
  font-weight: 600;
  font-size: 15px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  max-width: 70%;
}

.progress-percent {
  font-size: 15px;
  font-weight: 700;
  color: var(--accent);
  font-variant-numeric: tabular-nums;
}

.progress-bar-track {
  width: 100%;
  height: 6px;
  background: var(--fill);
  border-radius: 3px;
  overflow: hidden;
}

.progress-bar-fill {
  height: 100%;
  background: var(--accent);
  border-radius: 3px;
  width: 0%;
  transition: width 0.3s ease;
}

.progress-status {
  margin-top: 12px;
  font-size: 14px;
  color: var(--text-secondary);
}

/* ============ Error ============ */

.error-message {
  display: none;
  background: rgba(255, 69, 58, 0.08);
  border: 1px solid rgba(255, 69, 58, 0.2);
  color: var(--red);
  padding: 14px 18px;
  border-radius: var(--radius-sm);
  margin-top: 16px;
  font-size: 15px;
  font-weight: 500;
}

.error-message.active {
  display: block;
  animation: fadeIn 0.3s ease;
}

/* ============ Result ============ */

.result-section {
  display: none;
  margin-top: 24px;
}

.result-section.active {
  display: block;
  animation: slideUp 0.4s ease;
}

.result-card {
  background: var(--surface);
  backdrop-filter: blur(40px) saturate(180%);
  -webkit-backdrop-filter: blur(40px) saturate(180%);
  border-radius: var(--radius);
  border: 1px solid var(--glass-border);
  box-shadow: var(--shadow-elevated);
  padding: 32px;
}

.app-info {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 28px;
  padding-bottom: 24px;
  border-bottom: 1px solid var(--separator);
}

.app-icon {
  width: 68px;
  height: 68px;
  border-radius: 16px;
  object-fit: cover;
  box-shadow: var(--icon-shadow);
  flex-shrink: 0;
}

.app-details {
  min-width: 0;
}

.app-details h3 {
  font-size: 19px;
  font-weight: 700;
  letter-spacing: -0.2px;
  margin-bottom: 2px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.app-meta {
  font-size: 13px;
  color: var(--text-secondary);
  display: flex;
  flex-wrap: wrap;
  gap: 4px 12px;
}

.app-bundle {
  font-family: 'SF Mono', SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  font-size: 12px;
  color: var(--text-tertiary);
  margin-top: 2px;
}

/* QR Section */

.qr-section {
  text-align: center;
  margin-bottom: 28px;
  padding-bottom: 24px;
  border-bottom: 1px solid var(--separator);
}

.qr-wrap {
  display: inline-block;
  padding: 16px;
  background: #ffffff;
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow);
}

.qr-wrap img {
  width: 180px;
  height: 180px;
  display: block;
}

.qr-label {
  font-size: 14px;
  color: var(--text-secondary);
  margin-top: 14px;
}

/* Link Section */

.link-section {
  margin-bottom: 24px;
}

.link-label {
  display: block;
  font-size: 12px;
  font-weight: 600;
  color: var(--text-secondary);
  margin-bottom: 8px;
  text-transform: uppercase;
  letter-spacing: 0.6px;
}

.link-input-group {
  display: flex;
  gap: 8px;
}

.link-input {
  flex: 1;
  padding: 12px 16px;
  border: 1px solid var(--separator);
  border-radius: var(--radius-xs);
  font-size: 14px;
  color: var(--text);
  background: var(--fill);
  outline: none;
  font-family: 'SF Mono', SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  transition: border-color 0.2s;
}

.link-input:focus {
  border-color: var(--accent);
}

.copy-btn {
  padding: 12px 22px;
  background: var(--accent);
  color: #fff;
  border: none;
  border-radius: var(--radius-xs);
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s;
  white-space: nowrap;
}

.copy-btn:hover {
  background: var(--accent-hover);
}

.copy-btn.copied {
  background: var(--green);
}

/* Actions */

.result-actions {
  display: flex;
  gap: 12px;
}

.btn {
  flex: 1;
  padding: 14px 24px;
  border-radius: var(--radius-xs);
  font-size: 16px;
  font-weight: 600;
  cursor: pointer;
  text-align: center;
  transition: all 0.2s;
  border: none;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.btn-primary {
  background: var(--accent);
  color: #fff;
}

.btn-primary:hover {
  background: var(--accent-hover);
}

.btn-secondary {
  background: var(--fill);
  color: var(--text);
}

.btn-secondary:hover {
  background: var(--separator);
}

/* ============ Footer ============ */

.footer {
  text-align: center;
  padding: 32px 20px 40px;
  color: var(--text-tertiary);
  font-size: 13px;
}

.footer a {
  color: var(--text-secondary);
  text-decoration: none;
  transition: color 0.2s;
}

.footer a:hover {
  color: var(--accent);
}

.footer-links {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  margin-top: 6px;
}

.footer-links svg {
  width: 16px;
  height: 16px;
}

/* ============ Install Page ============ */

.install-container {
  max-width: 420px;
  margin: 0 auto;
  padding: 20px;
  text-align: center;
  flex: 1;
}

.install-card {
  background: var(--surface);
  backdrop-filter: blur(40px) saturate(180%);
  -webkit-backdrop-filter: blur(40px) saturate(180%);
  border-radius: var(--radius);
  border: 1px solid var(--glass-border);
  padding: 40px 32px;
  box-shadow: var(--shadow-elevated);
}

.install-icon {
  width: 100px;
  height: 100px;
  border-radius: 24px;
  object-fit: cover;
  box-shadow: var(--icon-shadow);
  margin-bottom: 20px;
}

.install-card h2 {
  font-size: 24px;
  font-weight: 700;
  letter-spacing: -0.3px;
  margin-bottom: 4px;
}

.install-version {
  font-size: 15px;
  color: var(--text-secondary);
  margin-bottom: 4px;
}

.install-bundle {
  font-size: 12px;
  color: var(--text-tertiary);
  font-family: 'SF Mono', SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  margin-bottom: 8px;
}

.file-size-info {
  font-size: 13px;
  color: var(--text-secondary);
  margin-bottom: 24px;
}

.install-btn {
  display: block;
  width: 100%;
  padding: 16px 32px;
  background: var(--accent);
  color: #fff;
  border-radius: var(--radius-sm);
  font-size: 18px;
  font-weight: 700;
  text-decoration: none;
  transition: all 0.2s;
  margin-bottom: 20px;
}

.install-btn:hover {
  background: var(--accent-hover);
  transform: translateY(-1px);
  box-shadow: 0 4px 16px rgba(0, 122, 255, 0.3);
}

.install-instructions {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.6;
}

.non-ios-warning {
  display: none;
  background: rgba(255, 159, 10, 0.08);
  border: 1px solid rgba(255, 159, 10, 0.2);
  color: var(--orange);
  padding: 16px;
  border-radius: var(--radius-xs);
  margin-top: 20px;
  font-size: 14px;
  text-align: left;
}

@media (prefers-color-scheme: dark) {
  .non-ios-warning {
    background: rgba(255, 159, 10, 0.12);
    border-color: rgba(255, 159, 10, 0.3);
  }
}

.non-ios-warning.active {
  display: block;
}

.install-not-found {
  padding: 48px 20px;
  text-align: center;
}

.install-not-found h2 {
  font-size: 22px;
  font-weight: 700;
  margin-bottom: 8px;
}

.install-not-found p {
  color: var(--text-secondary);
  font-size: 15px;
  margin-bottom: 24px;
}

.install-loading {
  text-align: center;
  padding: 48px;
  color: var(--text-secondary);
  font-size: 16px;
}

.spinner {
  width: 32px;
  height: 32px;
  border: 3px solid var(--fill);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
  margin: 0 auto 16px;
}

/* ============ Animations ============ */

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

@keyframes slideUp {
  from {
    opacity: 0;
    transform: translateY(16px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

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

/* ============ Responsive ============ */

@media (max-width: 480px) {
  .header {
    padding: 40px 16px 8px;
  }

  .header h1 {
    font-size: 26px;
  }

  .header p {
    font-size: 15px;
  }

  .container {
    padding: 16px;
  }

  .upload-zone {
    padding: 40px 24px;
  }

  .result-card,
  .progress-card {
    padding: 24px;
  }

  .app-info {
    flex-direction: column;
    text-align: center;
  }

  .app-meta {
    justify-content: center;
  }

  .link-input-group {
    flex-direction: column;
  }

  .result-actions {
    flex-direction: column;
  }

  .install-card {
    padding: 32px 24px;
  }
}