:root {
  --onm-blue: #0056b3;
  --onm-blue-dark: #003d82;
  --onm-blue-muted: #1e4a7a;
  --onm-gray-bg: #f0f2f5;
  --onm-gray-toolbar: #e8eaed;
  --onm-border: #d1d5db;
  --onm-footer-deep: #0f2942;
}

html {
  scroll-behavior: smooth;
}

html, body {
  height: 100%;
}

body {
  font-family: "Inter", system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  background-color: #fff;
  color: #1f2937;
  display: flex;
  flex-direction: column;
}

.onm-header {
  background: linear-gradient(105deg, var(--onm-blue-dark) 0%, var(--onm-blue) 48%, #0a6bcb 100%);
  border-bottom: 1px solid rgba(255, 255, 255, 0.12);
}

.onm-navbar .navbar-brand,
.onm-navbar .nav-link {
  color: #fff !important;
  font-weight: 500;
  letter-spacing: 0.01em;
}

.onm-navbar .nav-link:hover,
.onm-navbar .nav-link:focus {
  color: #fff !important;
  opacity: 0.92;
  text-decoration: underline;
  text-underline-offset: 4px;
}

.onm-navbar .navbar-toggler {
  filter: brightness(1.1);
}

.onm-logo {
  border-radius: 8px;
  object-fit: cover;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.2);
}

/* Mobile: centered nav stack; desktop: right-aligned row */
@media (max-width: 991.98px) {
  .onm-nav-collapse {
    padding-top: 0.75rem;
    padding-bottom: 0.5rem;
  }

  .onm-nav-collapse .onm-main-nav {
    width: 100%;
    align-items: center !important;
    margin-left: 0 !important;
    margin-right: 0 !important;
  }

  .onm-nav-collapse .nav-item {
    width: 100%;
    max-width: 280px;
  }

  .onm-nav-collapse .nav-link {
    border-radius: 0.5rem;
    padding-top: 0.65rem !important;
    padding-bottom: 0.65rem !important;
  }

  .onm-nav-collapse .nav-link i {
    min-width: 1.25rem;
    text-align: center;
  }
}

@media (min-width: 992px) {
  .onm-main-nav .nav-link {
    border-radius: 0.375rem;
  }

  .onm-main-nav .nav-link:hover {
    background: rgba(255, 255, 255, 0.1);
    text-decoration: none;
  }
}

.onm-lang-select-footer {
  max-width: 22rem;
  margin-left: auto;
  margin-right: auto;
}

@media (min-width: 768px) {
  .onm-lang-select-footer {
    margin-left: 0;
    margin-right: 0;
  }
}

/* Footer */
.onm-footer {
  background: var(--onm-gray-bg);
  border-top: 1px solid var(--onm-border);
}

.onm-footer-main {
  background: linear-gradient(180deg, #f8fafc 0%, var(--onm-gray-bg) 100%);
}

.onm-footer-heading {
  color: var(--onm-blue-dark);
  font-weight: 600;
}

.onm-footer-link {
  color: #4b5563;
  text-decoration: none;
  transition: color 0.15s ease;
}

.onm-footer-link:hover {
  color: var(--onm-blue);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.text-onm-footer {
  color: var(--onm-blue-dark);
}

.onm-footer-bar {
  background: linear-gradient(90deg, var(--onm-footer-deep), var(--onm-blue-dark));
}

.onm-social-btn {
  width: 2.25rem;
  height: 2.25rem;
  padding: 0;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  border: 1px solid rgba(0, 86, 179, 0.35);
  color: var(--onm-blue);
  background: #fff;
  transition: background 0.15s ease, color 0.15s ease, transform 0.15s ease;
}

.onm-social-btn:hover {
  background: var(--onm-blue);
  color: #fff;
  border-color: var(--onm-blue);
  transform: translateY(-1px);
}

/* Back to top */
.onm-back-top {
  position: fixed;
  right: 1rem;
  bottom: 1.25rem;
  z-index: 1080;
  width: 3rem;
  height: 3rem;
  border-radius: 50%;
  padding: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  visibility: hidden;
  transform: translateY(12px);
  transition: opacity 0.25s ease, visibility 0.25s ease, transform 0.25s ease;
}

.onm-back-top.is-visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

@media (min-width: 992px) {
  .onm-back-top {
    right: 1.5rem;
    bottom: 1.5rem;
  }
}

.text-onm {
  color: var(--onm-blue);
}

.btn-onm-primary {
  background-color: var(--onm-blue);
  border-color: var(--onm-blue);
  color: #fff;
}

.btn-onm-primary:hover {
  background-color: var(--onm-blue-dark);
  border-color: var(--onm-blue-dark);
  color: #fff;
}

.btn-outline-onm {
  color: var(--onm-blue);
  border-color: var(--onm-blue);
}

.btn-outline-onm:hover {
  background-color: var(--onm-blue);
  color: #fff;
}

.hero-panel {
  background: linear-gradient(135deg, #eff6ff 0%, #ffffff 55%);
  border: 1px solid var(--onm-border);
  border-radius: 1rem;
}

.feature-icon {
  width: 3rem;
  height: 3rem;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 0.75rem;
  background: rgba(0, 86, 179, 0.1);
  color: var(--onm-blue);
}

.home-section-title {
  font-weight: 700;
  color: #111827;
  letter-spacing: -0.02em;
}

.onm-prose-serif {
  font-family: "Source Serif 4", Georgia, "Times New Roman", serif;
  font-size: 1.05rem;
  line-height: 1.75;
  color: #374151;
}

.rotating-wrapper {
  display: inline-flex;
  vertical-align: baseline;
  overflow: hidden;
  margin: 0;
  padding-bottom: 0.05em;
}

.rotating-word {
  display: inline-block;
  padding: 0 0.15em;
  border-radius: 0;
  color: #111827 !important;
  line-height: 1.05;
  font-weight: 800;
  box-shadow: none;
  text-shadow: none;
  transition: opacity 0.5s cubic-bezier(0.175, 0.885, 0.32, 1.275), transform 0.5s cubic-bezier(0.175, 0.885, 0.32, 1.275), background-color 0.5s ease;
}

.rotating-word.hide-up {
  opacity: 0;
  transform: translateY(-110%);
}

.rotating-word.hide-down {
  opacity: 0;
  transform: translateY(110%);
  transition: none;
}

/* ---------- Notepad tool page (reference-style chrome) ---------- */
.onm-page-notepad {
  background: var(--onm-gray-bg);
}

.onm-notepad-hero-title {
  font-size: clamp(1.75rem, 4vw, 2.25rem);
  font-weight: 700;
  color: var(--onm-blue-dark);
  letter-spacing: -0.02em;
}

.onm-notepad-shell {
  max-width: 1100px;
  margin-left: auto;
  margin-right: auto;
}

.onm-notepad-card {
  background: #fff;
  border: 1px solid #c5cad3;
  border-radius: 4px;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.08), 0 4px 14px rgba(15, 41, 66, 0.06);
  overflow: hidden;
}

.onm-notepad-toolbar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.35rem;
  padding: 0.5rem 0.65rem;
  background: var(--onm-gray-toolbar);
  border-bottom: 1px solid #d8dce1;
}

.onm-notepad-toolbar .btn-icon {
  width: 2.35rem;
  height: 2.35rem;
  padding: 0;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 1px solid transparent;
  border-radius: 4px;
  background: transparent;
  color: #374151;
  transition: background 0.12s ease, border-color 0.12s ease, color 0.12s ease;
}

.onm-notepad-toolbar .btn-icon:hover {
  background: #fff;
  border-color: #c5cad3;
  color: var(--onm-blue);
}

.onm-notepad-toolbar .btn-icon:active {
  background: #e2e6eb;
}

.onm-notepad-toolbar .btn-icon.text-danger:hover {
  color: #b91c1c !important;
  border-color: #fecaca;
}

.onm-notepad-wordcount {
  margin-left: auto;
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--onm-blue-dark);
  background: #fff;
  border: 1px solid #c5cad3;
  border-radius: 4px;
  padding: 0.35rem 0.65rem;
  white-space: nowrap;
}

.onm-notepad-field {
  display: block;
  width: 100%;
  min-height: min(62vh, 640px);
  padding: 1rem 1.15rem;
  font-family: ui-monospace, "Cascadia Code", "Segoe UI Mono", Menlo, Monaco, Consolas, "Liberation Mono", monospace;
  font-size: 0.9375rem;
  line-height: 1.6;
  color: #111827;
  background: #fff;
  border: none;
  resize: vertical;
  outline: none;
}

.onm-notepad-field::placeholder {
  color: #9ca3af;
}

.onm-notepad-hint {
  font-size: 0.8125rem;
  color: #6b7280;
  padding: 0.65rem 1rem;
  background: #fafbfc;
  border-top: 1px solid #e5e7eb;
}

/* Notepad info columns below editor */
.onm-notepad-info {
  max-width: 1100px;
  margin-left: auto;
  margin-right: auto;
}

.onm-notepad-info h2 {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--onm-blue-dark);
  margin-bottom: 0.5rem;
}

.onm-notepad-info p,
.onm-notepad-info li {
  font-size: 0.9375rem;
  line-height: 1.65;
  color: #4b5563;
}

.onm-notepad-info hr {
  border-color: #e5e7eb;
  opacity: 1;
  margin: 2rem 0;
}

/* Simple notepad legacy class used elsewhere */
.onm-textarea {
  min-height: 420px;
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", monospace;
  font-size: 0.95rem;
  line-height: 1.55;
}

.onm-sticky-tools {
  position: sticky;
  top: 4.5rem;
  z-index: 100;
}

/* Notes workspace (app) */
.onm-app {
  min-height: calc(100vh - 120px);
}

.onm-app-sidebar {
  background: var(--onm-gray-bg);
  border-right: 1px solid var(--onm-border);
  min-height: 520px;
}

.onm-app-sidebar .list-group-item {
  cursor: pointer;
  border-color: var(--onm-border);
}

.onm-app-sidebar .list-group-item.active {
  background-color: var(--onm-blue);
  border-color: var(--onm-blue);
}

.onm-editor-surface {
  min-height: 480px;
  outline: none;
  padding: 1rem 1.25rem;
  border: 1px solid var(--onm-border);
  border-radius: 0.5rem;
  background: #fff;
  line-height: 1.6;
}

.onm-editor-surface:focus {
  box-shadow: 0 0 0 0.2rem rgba(0, 86, 179, 0.15);
  border-color: var(--onm-blue);
}

.onm-menubar .btn {
  border-radius: 0;
  border-color: transparent;
}

.onm-menubar .btn:hover {
  background: rgba(0, 86, 179, 0.08);
}

.onm-statusbar {
  font-size: 0.8rem;
  border-top: 1px solid var(--onm-border);
  background: #fafafa;
}

.onm-title-input {
  font-weight: 600;
  font-size: 1.25rem;
  border: none;
  border-bottom: 2px solid var(--onm-border);
  border-radius: 0;
}

.onm-title-input:focus {
  box-shadow: none;
  border-color: var(--onm-blue);
}

@media (max-width: 991.98px) {
  .onm-app-sidebar {
    min-height: auto;
    border-right: none;
    border-bottom: 1px solid var(--onm-border);
  }
}

.onm-ad-slot {
  min-height: 90px;
  background: repeating-linear-gradient(
    -45deg,
    #f9fafb,
    #f9fafb 10px,
    #f3f4f6 10px,
    #f3f4f6 20px
  );
  border: 1px dashed var(--onm-border);
  border-radius: 0.5rem;
}

.letter-spacing-1 {
  letter-spacing: 0.06em;
}

/* ---------- FAQ Accordion ---------- */
.onm-faq-section {
  background-color: #fff;
}
.onm-faq-section .accordion-button {
  background-color: transparent;
  color: #1f2937;
  box-shadow: none !important;
  border: none;
  font-size: 1.05rem;
}
.onm-faq-section .accordion-button:not(.collapsed) {
  color: var(--onm-blue);
  background-color: #f8fafc;
  box-shadow: none;
}
.onm-faq-section .accordion-button:focus {
  box-shadow: none;
  border-color: rgba(0,0,0,.125);
}
.onm-faq-section .accordion-item {
  border-color: #e5e7eb;
  overflow: hidden;
}
.onm-faq-section .accordion-body {
  line-height: 1.6;
}