/* CSS Custom Properties for Light & Dark Mode + Soft Glassmorphic styling */
:root {
  --bg-gradient: radial-gradient(circle at 50% 0%, #e0e7ff 0%, #f1f5f9 60%, #e2e8f0 100%);
  --card-bg: rgba(255, 255, 255, 0.85);
  --card-border: rgba(255, 255, 255, 0.9);
  --card-shadow: 0 12px 36px -6px rgba(15, 23, 42, 0.08), 0 4px 12px rgba(15, 23, 42, 0.04);
  --text-primary: #0f172a;
  --text-secondary: #475569;
  --text-muted: #64748b;
  --input-bg: rgba(255, 255, 255, 0.95);
  --input-border: #cbd5e1;
  --input-focus: #3b82f6;
  --btn-primary-bg: #2563eb;
  --btn-primary-hover: #1d4ed8;
  --btn-secondary-bg: #475569;
  --btn-secondary-hover: #334155;
  --btn-outline-bg: rgba(255, 255, 255, 0.7);
  --btn-outline-border: #cbd5e1;
  --btn-outline-text: #334155;
  --btn-danger-bg: rgba(254, 242, 242, 0.8);
  --btn-danger-border: #fca5a5;
  --btn-danger-text: #dc2626;
  --status-ready-bg: rgba(241, 245, 249, 0.8);
  --status-ready-text: #334155;
  --status-ready-border: #cbd5e1;
  --preview-bg: rgba(255, 255, 255, 0.9);
  --preview-border: #e2e8f0;
  --modal-overlay: rgba(15, 23, 42, 0.4);
  --modal-bg: rgba(255, 255, 255, 0.95);
}

[data-theme="dark"] {
  --bg-gradient: radial-gradient(circle at 50% 0%, #1e1b4b 0%, #0f172a 50%, #020617 100%);
  --card-bg: rgba(30, 41, 59, 0.75);
  --card-border: rgba(255, 255, 255, 0.1);
  --card-shadow: 0 16px 40px -8px rgba(0, 0, 0, 0.5), 0 0 1px 1px rgba(255, 255, 255, 0.08);
  --text-primary: #f8fafc;
  --text-secondary: #cbd5e1;
  --text-muted: #94a3b8;
  --input-bg: rgba(15, 23, 42, 0.65);
  --input-border: #334155;
  --input-focus: #60a5fa;
  --btn-primary-bg: #3b82f6;
  --btn-primary-hover: #2563eb;
  --btn-secondary-bg: #334155;
  --btn-secondary-hover: #475569;
  --btn-outline-bg: rgba(30, 41, 59, 0.6);
  --btn-outline-border: #475569;
  --btn-outline-text: #e2e8f0;
  --btn-danger-bg: rgba(127, 29, 29, 0.3);
  --btn-danger-border: #ef4444;
  --btn-danger-text: #fca5a5;
  --status-ready-bg: rgba(30, 41, 59, 0.6);
  --status-ready-text: #cbd5e1;
  --status-ready-border: #334155;
  --preview-bg: rgba(15, 23, 42, 0.55);
  --preview-border: #334155;
  --modal-overlay: rgba(0, 0, 0, 0.7);
  --modal-bg: rgba(30, 41, 59, 0.95);
}

* {
  box-sizing: border-box;
}

body {
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  margin: 0;
  padding: 16px;
  background: var(--bg-gradient);
  background-attachment: fixed;
  color: var(--text-primary);
  min-height: 100vh;
  transition: background 0.3s ease, color 0.3s ease;
  display: flex;
  align-items: center;
  justify-content: center;
}

main.glass-card {
  width: 100%;
  max-width: 760px;
  padding: 28px;
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: 16px;
  box-shadow: var(--card-shadow);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  transition: all 0.3s ease;
}

.app-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 20px;
}

.logo-wrap {
  display: flex;
  align-items: center;
  gap: 10px;
}

.logo-badge {
  font-size: 22px;
}

h1 {
  margin: 0;
  font-size: 22px;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--text-primary);
}

.btn-theme {
  background: var(--btn-outline-bg);
  border: 1px solid var(--btn-outline-border);
  color: var(--text-primary);
  width: 38px;
  height: 38px;
  border-radius: 10px;
  font-size: 18px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: transform 0.2s, background 0.2s;
}
.btn-theme:hover {
  transform: scale(1.06);
}

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

.password-row label {
  font-size: 13px;
  font-weight: 500;
  color: var(--text-secondary);
  white-space: nowrap;
}

.pwd-input-wrap {
  display: flex;
  position: relative;
  flex: 1;
}

input[type=password], input[type=text] {
  width: 100%;
  padding: 10px 14px;
  background: var(--input-bg);
  border: 1px solid var(--input-border);
  color: var(--text-primary);
  border-radius: 8px;
  font-size: 14px;
  outline: none;
  transition: border-color 0.15s, box-shadow 0.15s;
}

.pwd-input-wrap input {
  padding-right: 40px;
}

input:focus, textarea:focus {
  border-color: var(--input-focus);
  box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.2);
}

.btn-icon {
  position: absolute;
  right: 6px;
  top: 50%;
  transform: translateY(-50%);
  background: transparent;
  border: none;
  padding: 4px 8px;
  cursor: pointer;
  font-size: 16px;
  color: var(--text-muted);
}

button, .file-btn {
  padding: 9px 15px;
  border: 1px solid transparent;
  border-radius: 8px;
  font-size: 14px;
  cursor: pointer;
  font-weight: 500;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  transition: all 0.15s ease;
  user-select: none;
}

.btn-primary {
  background: var(--btn-primary-bg);
  color: #ffffff;
}
.btn-primary:hover {
  background: var(--btn-primary-hover);
}

.btn-secondary {
  background: var(--btn-secondary-bg);
  color: #ffffff;
}
.btn-secondary:hover {
  background: var(--btn-secondary-hover);
}

.btn-outline {
  background: var(--btn-outline-bg);
  border-color: var(--btn-outline-border);
  color: var(--btn-outline-text);
}
.btn-outline:hover {
  filter: brightness(1.1);
}

.btn-danger {
  background: var(--btn-danger-bg);
  border-color: var(--btn-danger-border);
  color: var(--btn-danger-text);
}
.btn-danger:hover {
  filter: brightness(1.15);
}

#copyBtn {
  background: #059669;
  color: #ffffff;
}
#copyBtn:hover {
  background: #047857;
}

.status-box {
  font-size: 13px;
  padding: 9px 14px;
  border-radius: 8px;
  margin-bottom: 12px;
  background: var(--status-ready-bg);
  color: var(--status-ready-text);
  border: 1px solid var(--status-ready-border);
  transition: all 0.2s ease;
}
.status-box.success {
  background: rgba(16, 185, 129, 0.15);
  color: #10b981;
  border-color: rgba(16, 185, 129, 0.35);
}
.status-box.error {
  background: rgba(239, 68, 68, 0.15);
  color: #f87171;
  border-color: rgba(239, 68, 68, 0.35);
}
.status-box.info {
  background: rgba(59, 130, 246, 0.15);
  color: #60a5fa;
  border-color: rgba(59, 130, 246, 0.35);
}

.editor-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 8px;
}
.tabs {
  display: flex;
  gap: 6px;
}
.tab-btn {
  background: transparent;
  color: var(--text-muted);
  border: none;
  border-bottom: 2px solid transparent;
  border-radius: 0;
  padding: 6px 12px;
  font-size: 13px;
  cursor: pointer;
}
.tab-btn.active {
  color: var(--input-focus);
  border-bottom-color: var(--input-focus);
  font-weight: 600;
}

textarea {
  width: 100%;
  padding: 14px;
  background: var(--input-bg);
  border: 1px solid var(--input-border);
  color: var(--text-primary);
  border-radius: 10px;
  resize: vertical;
  font-family: inherit;
  font-size: 14px;
  margin-bottom: 12px;
  min-height: 220px;
  line-height: 1.6;
}

.markdown-body {
  width: 100%;
  padding: 16px;
  border: 1px solid var(--preview-border);
  background: var(--preview-bg);
  color: var(--text-primary);
  border-radius: 10px;
  min-height: 220px;
  margin-bottom: 12px;
  line-height: 1.6;
  font-size: 14px;
}
.markdown-body h1 { font-size: 1.4rem; margin-top: 0; }
.markdown-body h2 { font-size: 1.2rem; }
.markdown-body h3 { font-size: 1.05rem; }
.markdown-body pre { background: rgba(0, 0, 0, 0.35); color: #e2e8f0; padding: 10px 14px; border-radius: 8px; overflow-x: auto; }
.markdown-body code { background: rgba(148, 163, 184, 0.15); color: var(--text-primary); padding: 2px 6px; border-radius: 4px; font-size: 13px; font-family: monospace; }
.markdown-body pre code { background: transparent; padding: 0; }
.markdown-body ul, .markdown-body ol { padding-left: 20px; }
.markdown-body blockquote { border-left: 3px solid var(--input-focus); margin: 8px 0; padding-left: 12px; color: var(--text-muted); }

.actions-row {
  margin-top: 10px;
  flex-wrap: wrap;
}
.meta-info {
  margin-left: auto;
  font-size: 12px;
  color: var(--text-muted);
}

.qr-modal {
  position: fixed;
  inset: 0;
  background: var(--modal-overlay);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 100;
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}
.qr-card {
  background: var(--modal-bg);
  border: 1px solid var(--card-border);
  color: var(--text-primary);
  padding: 24px;
  border-radius: 16px;
  text-align: center;
  max-width: 320px;
  width: 90%;
  box-shadow: 0 20px 40px rgba(0,0,0,0.4);
}
.qr-card h3 {
  margin: 0 0 6px;
  font-size: 16px;
  color: var(--text-primary);
}
.qr-sub {
  font-size: 12px;
  color: var(--text-muted);
  margin: 0 0 16px;
}
#qrContainer img, #qrContainer svg {
  display: block;
  margin: 0 auto;
  max-width: 100%;
  border-radius: 8px;
  padding: 8px;
  background: #ffffff;
}

@media(max-width: 600px) {
  body {
    padding: 10px;
  }
  main.glass-card {
    padding: 18px 14px;
    border-radius: 12px;
  }
  .row {
    flex-direction: column;
    align-items: stretch;
  }
  .password-row {
    align-items: stretch;
  }
  .pwd-input-wrap {
    width: 100%;
  }
  .actions-row {
    flex-direction: row;
    gap: 8px;
  }
  .actions-row button, .actions-row .file-btn {
    flex: 1 1 calc(50% - 8px);
  }
  .meta-info {
    width: 100%;
    margin-left: 0;
    text-align: center;
    margin-top: 4px;
  }
}