/* ============================================================
   Chochi Tools — style.css
   Brand-aligned, mobile-first, pure CSS
   Sections: Reset · Variables · Typography · Layout · Header ·
   Footer · Alerts · Buttons · Hub · Tool Page · Forms · Results ·
   Content · FAQ · CTA Band · Related Tools · Loading · Responsive
   ============================================================ */

/* ===================== Reset ===================== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
img, svg { display: block; max-width: 100%; }
button, input, select, textarea { font: inherit; }
a { color: inherit; text-decoration: none; }
ul, ol { list-style: none; }

/* ===================== Variables ===================== */
:root {
  /* Brand colors */
  --color-primary:        #1a56db;
  --color-primary-dark:   #1248c0;
  --color-primary-light:  rgba(26, 86, 219, 0.08);
  --color-accent:         #f97316;

  /* Surfaces */
  --color-bg:             #f8fafc;
  --color-surface:        #ffffff;

  /* Text */
  --color-text:           #0f172a;
  --color-text-muted:     #64748b;

  /* UI chrome */
  --color-border:         #e2e8f0;
  --color-border-focus:   #1a56db;

  /* Feedback */
  --color-success:        #059669;
  --color-success-bg:     #ecfdf5;
  --color-success-border: #a7f3d0;
  --color-error:          #dc2626;
  --color-error-bg:       #fef2f2;
  --color-error-border:   #fecaca;
  --color-warning:        #d97706;
  --color-warning-bg:     #fffbeb;
  --color-warning-border: #fde68a;

  /* Radius & shadow */
  --radius:     10px;
  --radius-lg:  16px;
  --shadow:     0 1px 3px rgba(0,0,0,.07), 0 4px 16px rgba(0,0,0,.06);
  --shadow-hover: 0 8px 32px rgba(0,0,0,.13);
  --shadow-xl:  0 20px 48px rgba(0,0,0,.14);

  /* Header height (used in sticky offset) */
  --header-h: 64px;
}

/* ===================== Typography ===================== */
body {
  font-family: 'Inter', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI',
               'Helvetica Neue', Arial, sans-serif;
  font-size: 1rem;
  line-height: 1.6;
  color: var(--color-text);
  background: var(--color-bg);
}

h1, h2, h3, h4 {
  font-weight: 700;
  line-height: 1.2;
  color: var(--color-text);
}

h1 { font-size: clamp(1.75rem, 4vw, 2.75rem); }
h2 { font-size: clamp(1.2rem, 2.5vw, 1.55rem); }
h3 { font-size: 1.05rem; font-weight: 600; }

p { line-height: 1.65; }

code {
  background: rgba(0,0,0,.07);
  padding: .1em .4em;
  border-radius: 4px;
  font-size: .875em;
  font-family: 'JetBrains Mono', 'Fira Mono', 'Courier New', monospace;
}

::selection { background: var(--color-primary); color: #fff; }

/* ===================== Layout ===================== */
.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 1.25rem;
}

/* ===================== Header ===================== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  box-shadow: 0 1px 4px rgba(0,0,0,.05);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 1.25rem;
  height: var(--header-h);
  gap: 1rem;
}

.site-logo img {
  height: 38px;
  width: auto;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: .25rem;
}

.site-nav a {
  padding: .45rem .875rem;
  border-radius: var(--radius);
  font-size: .9rem;
  font-weight: 600;
  color: var(--color-text-muted);
  transition: color .15s, background .15s;
}

.site-nav a:hover {
  color: var(--color-primary);
  background: var(--color-primary-light);
}

.site-nav a:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
  border-radius: var(--radius);
}

.site-nav .nav-cta {
  background: var(--color-primary);
  color: #fff !important;
  margin-left: .25rem;
}

.site-nav .nav-cta:hover {
  background: var(--color-primary-dark);
}

/* ===================== Footer ===================== */
.site-footer {
  background: var(--color-surface);
  border-top: 1px solid var(--color-border);
  margin-top: 4rem;
  padding: 1.5rem 1.25rem;
}

.footer-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  max-width: 1200px;
  margin: 0 auto;
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: .875rem;
  color: var(--color-text-muted);
  font-size: .875rem;
}

.footer-brand img {
  height: 26px;
  width: auto;
  opacity: .75;
}

.footer-nav {
  display: flex;
  flex-wrap: wrap;
  gap: .125rem;
}

.footer-nav a {
  padding: .3rem .7rem;
  font-size: .875rem;
  font-weight: 500;
  color: var(--color-text-muted);
  border-radius: var(--radius);
  transition: color .15s, background .15s;
}

.footer-nav a:hover {
  color: var(--color-primary);
  background: var(--color-primary-light);
}

.footer-nav a:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

/* ===================== Alerts ===================== */
.alert {
  display: flex;
  align-items: flex-start;
  gap: .75rem;
  padding: 1rem 1.25rem;
  border-radius: var(--radius);
  margin-bottom: 1.5rem;
  font-size: .95rem;
  font-weight: 500;
  border: 1px solid;
}

.alert-success {
  background: var(--color-success-bg);
  border-color: var(--color-success-border);
  color: #065f46;
}

.alert-error {
  background: var(--color-error-bg);
  border-color: var(--color-error-border);
  color: #991b1b;
}

.alert-warning {
  background: var(--color-warning-bg);
  border-color: var(--color-warning-border);
  color: #92400e;
}

.alert-info {
  background: #eff6ff;
  border-color: #bfdbfe;
  color: #1e40af;
}

.alert a { color: inherit; text-decoration: underline; }

/* ===================== Buttons ===================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: .5rem;
  padding: .6875rem 1.5rem;
  border: 2px solid transparent;
  border-radius: var(--radius);
  font-size: .95rem;
  font-weight: 600;
  cursor: pointer;
  transition: all .18s ease;
  white-space: nowrap;
  line-height: 1.3;
  text-decoration: none;
}

.btn:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 3px;
}

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

.btn-primary:hover {
  background: var(--color-primary-dark);
  border-color: var(--color-primary-dark);
  transform: translateY(-1px);
  box-shadow: 0 4px 14px rgba(26,86,219,.3);
  color: #fff;
}

.btn-primary:active { transform: none; }

.btn-primary:disabled,
.btn-primary[disabled] {
  background: var(--color-text-muted);
  border-color: var(--color-text-muted);
  cursor: not-allowed;
  transform: none;
  box-shadow: none;
}

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

.btn-secondary:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
  background: var(--color-primary-light);
}

.btn-outline-white {
  background: transparent;
  color: #fff;
  border-color: rgba(255,255,255,.5);
}

.btn-outline-white:hover {
  background: rgba(255,255,255,.1);
  border-color: #fff;
  color: #fff;
}

.btn-success {
  background: var(--color-success);
  color: #fff;
  border-color: var(--color-success);
}

.btn-success:hover {
  background: #047857;
  border-color: #047857;
  transform: translateY(-1px);
  box-shadow: 0 4px 14px rgba(5,150,105,.3);
  color: #fff;
}

/* Size variants */
.btn-large,
.btn-lg {
  padding: .9rem 2rem;
  font-size: 1.05rem;
}

/* ===================== Hub Page ===================== */

/* Hero */
.hub-hero {
  background: linear-gradient(140deg, #0c1a3a 0%, #0f2d6b 55%, #1a56db 100%);
  color: #fff;
  padding: 4.5rem 1.25rem 6rem;
  text-align: center;
}

.hub-hero h1 {
  color: #fff;
  font-size: clamp(2rem, 5vw, 3.25rem);
  font-weight: 800;
  letter-spacing: -.03em;
  max-width: 760px;
  margin: 0 auto 1.25rem;
}

.hub-hero .hero-lead {
  font-size: clamp(1rem, 2.2vw, 1.2rem);
  color: rgba(255,255,255,.78);
  max-width: 600px;
  margin: 0 auto;
  line-height: 1.65;
}

.hub-hero .hero-lead a {
  color: #fff;
  text-decoration: underline;
  text-underline-offset: 2px;
}

/* Cards section */
.hub-cards {
  background: var(--color-bg);
  padding: 1rem 1.25rem 4rem;
  margin-top: -2.5rem;
}

.hub-cards-inner {
  max-width: 1200px;
  margin: 0 auto;
}

.hub-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
}

.hub-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 2rem;
  box-shadow: var(--shadow);
  transition: transform .22s ease, box-shadow .22s ease;
  display: flex;
  flex-direction: column;
}

.hub-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-hover);
}

.hub-card-icon {
  width: 52px;
  height: 52px;
  border-radius: 12px;
  background: var(--color-primary-light);
  color: var(--color-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1.25rem;
  flex-shrink: 0;
}

.hub-card-icon svg { width: 26px; height: 26px; }

.hub-card h2 {
  font-size: 1.2rem;
  margin-bottom: .625rem;
}

.hub-card > p {
  color: var(--color-text-muted);
  font-size: .95rem;
  margin-bottom: 1rem;
  line-height: 1.55;
}

.hub-card-features {
  list-style: none;
  margin: 0 0 1.75rem;
  padding: 0;
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: .45rem;
}

.hub-card-features li {
  font-size: .875rem;
  color: var(--color-text-muted);
  padding-left: 1.3rem;
  position: relative;
}

.hub-card-features li::before {
  content: '';
  position: absolute;
  left: 0;
  top: .5em;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--color-primary);
  opacity: .55;
}

/* Hub CTA band */
.hub-cta-band {
  background: linear-gradient(140deg, #0c1a3a 0%, #1a56db 100%);
  color: #fff;
  padding: 4rem 1.25rem;
  text-align: center;
}

.hub-cta-inner {
  max-width: 620px;
  margin: 0 auto;
}

.hub-cta-band h2 {
  color: #fff;
  font-size: clamp(1.5rem, 3vw, 2rem);
  margin-bottom: .75rem;
}

.hub-cta-band p {
  color: rgba(255,255,255,.72);
  max-width: 500px;
  margin: 0 auto 2rem;
  line-height: 1.65;
}

.hub-cta-buttons {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  justify-content: center;
}

/* ===================== Tool Page Layout ===================== */
.site-main {
  min-height: calc(100vh - var(--header-h) - 80px);
}

.tool-wrapper {
  max-width: 840px;
  margin: 0 auto;
  padding: 2.5rem 1.25rem 1.5rem;
}

/* Breadcrumb */
.tool-breadcrumb {
  margin-bottom: 1.5rem;
}

.back-link {
  display: inline-flex;
  align-items: center;
  gap: .35rem;
  font-size: .875rem;
  font-weight: 600;
  color: var(--color-primary);
  padding: .2rem 0;
  border-bottom: 1px solid transparent;
  transition: border-color .15s;
}

.back-link:hover { border-bottom-color: var(--color-primary); }

.back-link:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 3px;
  border-radius: 2px;
}

/* Tool header (H1 + intro above the form card) */
.tool-header {
  margin-bottom: 1.75rem;
}

.tool-page-h1 {
  font-size: clamp(1.55rem, 3.5vw, 2.2rem);
  font-weight: 800;
  letter-spacing: -.025em;
  margin-bottom: .625rem;
}

.tool-intro {
  font-size: 1.05rem;
  color: var(--color-text-muted);
  line-height: 1.65;
}

/* Tool UI card (contains form + results) */
.tool-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 2rem;
  box-shadow: var(--shadow);
  margin-bottom: 2rem;
}

/* How-it-works hint above form */
.tool-ui-desc {
  padding: .875rem 1rem;
  background: var(--color-primary-light);
  border-left: 3px solid var(--color-primary);
  border-radius: 0 var(--radius) var(--radius) 0;
  margin-bottom: 1.5rem;
  font-size: .95rem;
  color: var(--color-text-muted);
  line-height: 1.6;
}

.tool-ui-desc strong { color: var(--color-text); }

/* Content sections wrapper */
.tool-content {
  max-width: 760px;
}

/* ===================== Forms ===================== */
.tool-form {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: .4rem;
}

.form-group label {
  font-size: .9rem;
  font-weight: 600;
  color: var(--color-text);
}

.form-group small {
  font-size: .825rem;
  color: var(--color-text-muted);
  line-height: 1.4;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}

/* Text / number inputs */
.form-group input[type="text"],
.form-group input[type="number"],
.form-group select {
  width: 100%;
  min-height: 46px;
  padding: .6875rem .9rem;
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius);
  font-size: 1rem;
  color: var(--color-text);
  background: var(--color-surface);
  transition: border-color .15s, box-shadow .15s;
  appearance: none;
  -webkit-appearance: none;
}

.form-group input[type="text"]::placeholder,
.form-group input[type="number"]::placeholder {
  color: var(--color-text-muted);
  opacity: .7;
}

.form-group input[type="text"]:focus,
.form-group input[type="number"]:focus,
.form-group select:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(26,86,219,.12);
}

/* Custom select arrow */
.form-group select {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%2364748b' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M6 9l6 6 6-6'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right .875rem center;
  padding-right: 2.5rem;
  cursor: pointer;
}

/* File drag-and-drop zone */
.file-drop-zone {
  position: relative;
  border: 2px dashed var(--color-border);
  border-radius: var(--radius);
  padding: 2rem 1.5rem;
  text-align: center;
  cursor: pointer;
  background: var(--color-bg);
  transition: border-color .2s, background .2s;
}

.file-drop-zone:hover,
.file-drop-zone.drag-over {
  border-color: var(--color-primary);
  background: var(--color-primary-light);
}

.file-drop-zone input[type="file"] {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  opacity: 0;
  cursor: pointer;
}

.drop-icon {
  width: 36px;
  height: 36px;
  margin: 0 auto .75rem;
  color: var(--color-text-muted);
}

.drop-label {
  font-size: .95rem;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: .25rem;
}

.drop-hint {
  font-size: .825rem;
  color: var(--color-text-muted);
}

.file-selected-name {
  display: none;
  margin-top: .625rem;
  font-size: .875rem;
  font-weight: 600;
  color: var(--color-primary);
}

/* Range / quality slider */
.range-wrapper {
  display: flex;
  align-items: center;
  gap: .875rem;
}

.form-group input[type="range"] {
  flex: 1;
  height: 4px;
  -webkit-appearance: none;
  appearance: none;
  background: var(--color-border);
  border-radius: 99px;
  outline: none;
  cursor: pointer;
}

.form-group input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 20px;
  height: 20px;
  background: var(--color-primary);
  border-radius: 50%;
  box-shadow: 0 0 0 3px rgba(26,86,219,.15);
  cursor: pointer;
  transition: box-shadow .15s;
}

.form-group input[type="range"]:focus::-webkit-slider-thumb {
  box-shadow: 0 0 0 5px rgba(26,86,219,.2);
}

.form-group input[type="range"]::-moz-range-thumb {
  width: 20px;
  height: 20px;
  background: var(--color-primary);
  border-radius: 50%;
  border: none;
  cursor: pointer;
}

.range-value {
  min-width: 3rem;
  flex-shrink: 0;
  text-align: right;
  font-size: .95rem;
  font-weight: 700;
  color: var(--color-primary);
  white-space: nowrap;
}

/* Submit button — full-width inside .tool-form only (scoped to avoid breaking inline search bars) */
.tool-form button[type="submit"] { width: 100%; }

/* File preview (after file selection) */
.file-preview {
  display: none;
  margin-top: 1rem;
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--color-border);
  text-align: center;
  background: var(--color-bg);
}

.file-preview img {
  max-width: 100%;
  max-height: 280px;
  object-fit: contain;
}

/* ===================== Results ===================== */
.result-container {
  margin-top: 1.75rem;
  animation: fadeInUp .3s ease;
}

@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(10px); }
  to   { opacity: 1; transform: translateY(0); }
}

.result-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: .875rem;
  margin: 1.25rem 0;
}

.stat-card {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 1.25rem;
  text-align: center;
}

.stat-card h4 {
  font-size: .7rem;
  text-transform: uppercase;
  letter-spacing: .06em;
  color: var(--color-text-muted);
  margin-bottom: .5rem;
  font-weight: 600;
}

.stat-card .stat-value {
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--color-primary);
  margin-bottom: .2rem;
}

.stat-savings .stat-value { color: var(--color-success); }

.stat-card .stat-label {
  font-size: .8rem;
  color: var(--color-text-muted);
}

.download-section {
  text-align: center;
  margin-top: 1.25rem;
}

/* YouTube thumbnail grid */
.thumbnails-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.25rem;
  margin-top: 1.5rem;
}

.thumbnail-item {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  overflow: hidden;
  transition: transform .2s, box-shadow .2s;
}

.thumbnail-item:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-hover);
}

.thumbnail-preview {
  width: 100%;
  aspect-ratio: 16 / 9;
  overflow: hidden;
  background: var(--color-bg);
}

.thumbnail-preview img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.thumbnail-info { padding: 1rem; }

.thumbnail-info h3 {
  font-size: .9rem;
  font-weight: 600;
  margin-bottom: .2rem;
}

.thumbnail-size {
  font-size: .8rem;
  color: var(--color-text-muted);
  margin-bottom: .75rem;
}

.thumbnail-actions { display: flex; gap: .5rem; }

.thumbnail-actions .btn {
  flex: 1;
  font-size: .8rem;
  padding: .45rem .75rem;
}

/* ===================== Content Sections ===================== */
.tool-section {
  padding-top: 2rem;
  margin-top: 2rem;
  border-top: 1px solid var(--color-border);
}

.tool-section h2 {
  font-size: clamp(1.1rem, 2vw, 1.4rem);
  font-weight: 700;
  margin-bottom: .875rem;
}

.tool-section p {
  color: var(--color-text-muted);
  margin-bottom: .875rem;
  line-height: 1.7;
}

.tool-section p:last-child { margin-bottom: 0; }

.tool-section a { color: var(--color-primary); text-decoration: underline; text-underline-offset: 2px; }

.steps-list {
  padding-left: 1.5rem;
  list-style: decimal;
  color: var(--color-text-muted);
  display: flex;
  flex-direction: column;
  gap: .5rem;
  line-height: 1.65;
}

.steps-list li::marker { color: var(--color-primary); font-weight: 700; }

.steps-list ul {
  margin-top: .4rem;
  padding-left: 1.25rem;
  list-style: disc;
}

.steps-list ul li { font-size: .95em; }

/* ===================== FAQ ===================== */
.tool-faq .faq-item {
  padding: 1.125rem 0;
  border-bottom: 1px solid var(--color-border);
}

.tool-faq .faq-item:first-child { border-top: 1px solid var(--color-border); }

.tool-faq .faq-item h3 {
  font-size: 1rem;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: .45rem;
}

.tool-faq .faq-item p {
  font-size: .9rem;
  color: var(--color-text-muted);
  margin-bottom: 0;
  line-height: 1.65;
}

.tool-faq .faq-item p a { color: var(--color-primary); text-decoration: underline; }

/* ===================== CTA Band (tool pages) ===================== */
.tool-cta-band {
  background: linear-gradient(140deg, #0c1a3a 0%, #1a56db 100%);
  border-radius: var(--radius-lg);
  padding: 2.5rem;
  color: #fff;
  margin-top: 3rem;
}

.tool-cta-band h2 {
  color: #fff;
  font-size: 1.35rem;
  margin-bottom: .5rem;
}

.tool-cta-band p {
  color: rgba(255,255,255,.72);
  margin-bottom: .5rem;
  font-size: .95rem;
  line-height: 1.6;
}

.tool-cta-band .cta-list {
  list-style: none;
  padding: 0;
  margin: 1rem 0;
  color: rgba(255,255,255,.78);
  font-size: .9rem;
}

.tool-cta-band .cta-list li {
  padding: .3rem 0 .3rem 1.5rem;
  position: relative;
}

.tool-cta-band .cta-list li::before {
  content: '→';
  position: absolute;
  left: 0;
  color: rgba(255,255,255,.45);
}

.cta-links {
  display: flex;
  flex-wrap: wrap;
  gap: .875rem;
  margin-top: 1.5rem;
}

.cta-note {
  margin-top: 1.25rem !important;
  font-size: .85rem !important;
  color: rgba(255,255,255,.45) !important;
  font-style: italic;
  margin-bottom: 0 !important;
}

.cta-note a {
  color: rgba(255,255,255,.65);
  text-decoration: underline;
}

/* Legacy .tool-cta support (backwards compat) */
.tool-cta { display: none; }

/* ===================== Related Tools ===================== */
.related-tools {
  margin-top: 2.5rem;
  padding-top: 2.5rem;
  border-top: 1px solid var(--color-border);
}

.related-label {
  font-size: .75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .07em;
  color: var(--color-text-muted);
  margin-bottom: 1rem;
}

.related-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: .875rem;
  margin-bottom: 1.5rem;
}

.related-card {
  display: flex;
  align-items: flex-start;
  gap: .875rem;
  background: var(--color-surface);
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius);
  padding: 1.125rem;
  text-decoration: none;
  transition: border-color .18s, box-shadow .18s;
}

.related-card:hover {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(26,86,219,.08);
}

.related-card:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 3px;
}

.related-card-icon {
  width: 40px;
  height: 40px;
  border-radius: 8px;
  background: var(--color-primary-light);
  color: var(--color-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.related-card-icon svg { width: 20px; height: 20px; }

.related-card-title {
  font-size: .9rem;
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: .15rem;
}

.related-card-desc {
  font-size: .825rem;
  color: var(--color-text-muted);
  margin-bottom: 0;
}

/* Back-to-hub row */
.tool-back-row {
  margin-top: 1.25rem;
  font-size: .9rem;
}

.tool-back-row a {
  color: var(--color-primary);
  font-weight: 600;
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color .15s;
}

.tool-back-row a:hover { border-bottom-color: var(--color-primary); }

/* ===================== Loading State ===================== */
@keyframes spin { to { transform: rotate(360deg); } }

.btn-loading {
  position: relative;
  color: transparent !important;
  pointer-events: none;
}

.btn-loading::after {
  content: '';
  position: absolute;
  inset: 0;
  margin: auto;
  width: 18px;
  height: 18px;
  border: 2px solid rgba(255,255,255,.35);
  border-top-color: #fff;
  border-radius: 50%;
  animation: spin .7s linear infinite;
}

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

/* 480px — small phones → 2-col thumbnail grid */
@media (min-width: 480px) {
  .thumbnails-grid { grid-template-columns: 1fr 1fr; }
  .related-grid    { grid-template-columns: 1fr 1fr; }
}

/* 768px — tablets */
@media (min-width: 768px) {
  .site-logo img   { height: 44px; }
  .hub-grid        { grid-template-columns: repeat(2, 1fr); }
  .result-stats    { grid-template-columns: repeat(3, 1fr); }
  .tool-card       { padding: 2.5rem; }
  .tool-wrapper    { padding: 3rem 2rem 2rem; }
  .tool-cta-band   { padding: 3rem; }
}

/* 1024px — desktop */
@media (min-width: 1024px) {
  .hub-hero        { padding: 7rem 1.25rem 8rem; }
  .hub-grid        { grid-template-columns: repeat(3, 1fr); }
  .thumbnails-grid { grid-template-columns: repeat(3, 1fr); }
}

/* Small phones — collapse 2-col grids */
@media (max-width: 479px) {
  .form-row          { grid-template-columns: 1fr; }
  .result-stats      { grid-template-columns: 1fr 1fr; }
  .hub-cta-buttons   { flex-direction: column; align-items: center; }
  .hub-cta-buttons .btn { width: 100%; max-width: 320px; }
  .cta-links         { flex-direction: column; }
  .cta-links .btn    { width: 100%; }
  .stat-card .stat-value { font-size: 1.25rem; }
}

/* =========================================================
   Meta Tag Checker — URL search bar
   ========================================================= */
.mtc-form { margin-top: 1.5rem; }
/* First child in the card — no top margin needed */
.tool-card > .mtc-form:first-child { margin-top: 0; }

.mtc-form-label {
  display: block;
  font-size: .875rem;
  font-weight: 600;
  color: var(--color-text-muted);
  margin-bottom: .6rem;
  text-transform: uppercase;
  letter-spacing: .04em;
}

.mtc-search-bar {
  display: flex;
  align-items: stretch;
  border: 2px solid var(--color-border);
  border-radius: var(--radius-lg);
  background: #ffffff;
  overflow: hidden;
  transition: border-color .18s, box-shadow .18s;
}
.mtc-search-bar:focus-within {
  border-color: var(--color-border-focus);
  box-shadow: 0 0 0 3px rgba(26, 86, 219, .12);
}

.mtc-search-prefix {
  display: flex;
  align-items: center;
  padding: 0 .9rem 0 1.1rem;
  color: var(--color-text-muted);
  flex-shrink: 0;
}

.mtc-search-input,
.mtc-search-input:focus,
.mtc-search-input:active {
  flex: 1 1 0%;
  min-width: 8rem; /* Keep URL field visible; flex allows it to grow */
  width: 100%; /* Fill remaining space; min-width prevents collapse */
  border: none;
  outline: none;
  padding: 1rem .5rem 1rem .25rem;
  font-size: .9375rem;
  font-family: 'JetBrains Mono', 'Fira Mono', 'Courier New', monospace;
  color: #0f172a;
  background: #ffffff;
  box-shadow: none;
  -webkit-text-fill-color: #0f172a;
}
.mtc-search-input::placeholder {
  color: #94a3b8;
  -webkit-text-fill-color: #94a3b8;
  opacity: 1;
  font-family: 'Inter', system-ui, sans-serif;
}

.mtc-search-btn {
  display: flex;
  align-items: center;
  gap: .5rem;
  padding: 0 1.4rem;
  background: var(--color-primary);
  color: #fff;
  border: none;
  font-weight: 600;
  font-size: .9375rem;
  cursor: pointer;
  transition: background .18s;
  white-space: nowrap;
  flex: 0 0 auto;
}
/* Override .tool-form button[type="submit"] { width: 100% } so URL field stays visible */
.tool-form.mtc-form button[type="submit"],
.tool-form.mtc-form .mtc-search-btn {
  width: auto;
}
.mtc-search-btn:hover  { background: var(--color-primary-dark); }
.mtc-search-btn:active { background: var(--color-primary-dark); }
.mtc-btn-icon-only { flex-shrink: 0; }

.mtc-form-hint {
  font-size: .8rem;
  color: var(--color-text-muted);
  margin-top: .5rem;
  line-height: 1.4;
}

/* =========================================================
   Meta Tag Checker — score summary bar
   ========================================================= */
.mtc-summary {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 1rem 1.25rem;
  margin-bottom: 1.25rem;
  display: flex;
  flex-direction: column;
  gap: .75rem;
}

.mtc-summary-url {
  display: flex;
  align-items: center;
  gap: .5rem;
  font-size: .875rem;
  min-width: 0;
  flex-wrap: wrap;
}
.mtc-summary-url svg { flex-shrink: 0; color: var(--color-text-muted); }
.mtc-summary-link {
  color: var(--color-primary);
  text-decoration: underline;
  text-underline-offset: 2px;
  word-break: break-all;
  font-family: 'JetBrains Mono', 'Fira Mono', monospace;
  font-size: .8125rem;
}
.mtc-summary-link:hover { color: var(--color-primary-dark); }

.mtc-http-badge {
  flex-shrink: 0;
  display: inline-flex;
  align-items: center;
  background: #e0e7ff;
  color: #3730a3;
  border-radius: 4px;
  padding: .1em .5em;
  font-size: .7rem;
  font-weight: 700;
  letter-spacing: .04em;
}

.mtc-summary-stats {
  display: flex;
  align-items: center;
  gap: .5rem;
  flex-wrap: wrap;
}

.mtc-score-badge {
  display: inline-flex;
  align-items: center;
  gap: .3rem;
  padding: .35em .85em;
  border-radius: 999px;
  font-size: .8rem;
  font-weight: 700;
  letter-spacing: .03em;
}
.mtc-score-good { background: var(--color-success-bg); color: var(--color-success); border: 1px solid var(--color-success-border); }
.mtc-score-warn { background: var(--color-warning-bg); color: var(--color-warning); border: 1px solid var(--color-warning-border); }
.mtc-score-poor { background: var(--color-error-bg);   color: var(--color-error);   border: 1px solid var(--color-error-border);   }
.mtc-score-icon { font-size: .9em; }

.mtc-stat-pill {
  display: inline-flex;
  align-items: center;
  gap: .25rem;
  padding: .28em .75em;
  border-radius: 999px;
  font-size: .78rem;
  font-weight: 500;
}
.mtc-stat-pass { background: var(--color-success-bg); color: var(--color-success); }
.mtc-stat-warn { background: var(--color-warning-bg); color: var(--color-warning); }
.mtc-stat-fail { background: var(--color-error-bg);   color: var(--color-error);   }
.mtc-stat-pill strong { font-weight: 700; }

/* =========================================================
   Meta Tag Checker — results groups and rows
   ========================================================= */
.mtc-results {
  display: flex;
  flex-direction: column;
  gap: .75rem;
  margin-bottom: 1.5rem;
}

.mtc-group {
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  overflow: hidden;
  border-left-width: 3px;
}
.mtc-group-pass    { border-left-color: var(--color-success); }
.mtc-group-warning { border-left-color: var(--color-warning); }
.mtc-group-fail    { border-left-color: var(--color-error); }

.mtc-group-header {
  display: flex;
  align-items: center;
  gap: .5rem;
  padding: .65rem 1rem;
  background: var(--color-bg);
  border-bottom: 1px solid var(--color-border);
}
.mtc-group-icon {
  display: flex;
  align-items: center;
  color: var(--color-text-muted);
  flex-shrink: 0;
}
.mtc-group-title {
  font-size: .75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .06em;
  color: var(--color-text-muted);
  flex: 1;
}
.mtc-group-pills {
  display: flex;
  gap: .3rem;
}
.mtc-mini-pill {
  display: inline-flex;
  align-items: center;
  padding: .1em .5em;
  border-radius: 4px;
  font-size: .68rem;
  font-weight: 700;
}
.mtc-mini-pill.pass { background: var(--color-success-bg); color: var(--color-success); }
.mtc-mini-pill.warn { background: var(--color-warning-bg); color: var(--color-warning); }
.mtc-mini-pill.fail { background: var(--color-error-bg);   color: var(--color-error); }

.mtc-group-rows { background: var(--color-surface); }

.mtc-tag-row {
  display: grid;
  grid-template-columns: 42px 140px 1fr auto;
  align-items: baseline;
  gap: .5rem .75rem;
  padding: .65rem 1rem;
  border-bottom: 1px solid var(--color-border);
  font-size: .8375rem;
  line-height: 1.5;
}
.mtc-tag-row:last-child { border-bottom: none; }

/* Status badge pill */
.mtc-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: .18em .45em;
  border-radius: 4px;
  font-size: .65rem;
  font-weight: 800;
  letter-spacing: .06em;
  width: 38px;
  text-align: center;
}
.mtc-badge-pass    { background: var(--color-success-bg); color: var(--color-success); }
.mtc-badge-warning { background: var(--color-warning-bg); color: var(--color-warning); }
.mtc-badge-fail    { background: var(--color-error-bg);   color: var(--color-error);   }
.mtc-badge-info    { background: var(--color-primary-light); color: var(--color-primary); }
.mtc-badge-missing { background: var(--color-error-bg);   color: var(--color-error);   }

.mtc-tag-name {
  font-weight: 600;
  color: var(--color-text);
  font-size: .8125rem;
}

.mtc-tag-val {
  color: var(--color-text);
  word-break: break-word;
  font-size: .8125rem;
  font-family: 'JetBrains Mono', 'Fira Mono', monospace;
  min-width: 0;
}
.mtc-tag-val em,
.mtc-tag-val.missing { color: var(--color-text-muted); font-style: italic; font-family: inherit; }

.mtc-tag-note {
  font-size: .72rem;
  white-space: nowrap;
  font-weight: 500;
  text-align: right;
}
.mtc-note-pass    { color: var(--color-success); }
.mtc-note-warning { color: var(--color-warning); }
.mtc-note-fail    { color: var(--color-error);   }
.mtc-note-missing { color: var(--color-error);   }
.mtc-note-info    { color: var(--color-text-muted); }

/* =========================================================
   Meta Tag Checker — responsive
   ========================================================= */
@media (max-width: 640px) {
  /* Stack URL field and button so both are visible; no overlap */
  .mtc-search-bar {
    flex-direction: column;
    align-items: stretch;
  }
  .mtc-search-prefix {
    padding: .6rem 1rem 0;
  }
  .mtc-search-input,
  .mtc-search-input:focus,
  .mtc-search-input:active {
    min-width: 0;
    padding: .75rem 1rem 1rem;
  }
  .mtc-search-btn {
    border-top: 1px solid var(--color-border);
    padding: .9rem 1rem;
    justify-content: center;
  }
  .mtc-search-btn span { display: inline; }
}
@media (max-width: 480px) {
  .mtc-search-btn span { display: none; }
  .mtc-search-btn { padding: 0 1rem; }

  .mtc-tag-row {
    grid-template-columns: 38px 1fr;
    grid-template-rows: auto auto;
  }
  .mtc-tag-name { grid-column: 2; grid-row: 1; }
  .mtc-tag-val  { grid-column: 1 / -1; padding-left: 46px; font-family: inherit; font-size: .8rem; }
  .mtc-tag-note { grid-column: 1 / -1; padding-left: 46px; text-align: left; white-space: normal; }

  .mtc-summary-stats { gap: .35rem; }
  .mtc-score-badge   { font-size: .75rem; }
  .mtc-stat-pill     { font-size: .72rem; }
}

@media (max-width: 480px) {
  .mtc-group-header { flex-wrap: wrap; }
  .mtc-group-pills  { margin-top: .25rem; }
}

/* ── Favicon Generator ──────────────────────────────────────────────── */
.favicon-file-list {
    list-style: none;
    padding: 0;
    margin: 0;
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
    gap: .5rem 1.5rem;
}
.favicon-file-list li {
    font-size: .875rem;
    color: var(--color-text-muted);
    padding: .25rem 0;
    border-bottom: 1px solid var(--color-border);
}
.favicon-file-list li strong {
    color: var(--color-text);
    display: block;
}

/* ============================================================
   Redirect Checker
   ============================================================ */
.redirect-chain {
    display: flex;
    flex-direction: column;
    gap: 0;
    margin: 1rem 0;
}
.redirect-hop {
    display: grid;
    grid-template-columns: 2rem 4.5rem 1fr auto;
    align-items: start;
    gap: .5rem 1rem;
    padding: .75rem 0;
    border-bottom: 1px solid var(--color-border);
    font-size: .875rem;
}
.redirect-hop:last-child { border-bottom: none; }
.hop-number {
    color: var(--color-text-muted);
    font-size: .75rem;
    font-weight: 700;
    padding-top: .15rem;
}
.hop-badge {
    display: inline-block;
    padding: .2rem .55rem;
    border-radius: 6px;
    font-weight: 700;
    font-size: .8125rem;
    text-align: center;
}
.badge-success  { background: var(--color-success-bg); color: var(--color-success); }
.badge-redirect { background: var(--color-primary-light); color: var(--color-primary); }
.badge-error    { background: var(--color-error-bg); color: var(--color-error); }
.badge-unknown  { background: var(--color-border); color: var(--color-text-muted); }
.hop-url {
    word-break: break-all;
    line-height: 1.4;
}
.hop-url a { color: var(--color-primary); }
.hop-url a:hover { text-decoration: underline; }
.hop-meta {
    font-size: .75rem;
    color: var(--color-text-muted);
    white-space: nowrap;
    padding-top: .15rem;
}
.hop-location {
    grid-column: 3 / 5;
    font-size: .75rem;
    color: var(--color-text-muted);
    margin-top: .15rem;
    word-break: break-all;
}
.hop-arrow {
    grid-column: 1 / 2;
    text-align: center;
    color: var(--color-border);
    font-size: .875rem;
    padding: .15rem 0;
}
@media (max-width: 600px) {
    .redirect-hop {
        grid-template-columns: 2rem 4rem 1fr;
    }
    .hop-meta { grid-column: 2 / 4; white-space: normal; }
    .hop-location { grid-column: 2 / 4; }
}
/* ============================================================
   Password Generator
   ============================================================ */
.password-result-row {
    display: flex;
    align-items: center;
    gap: .75rem;
    margin-bottom: .75rem;
}
.password-output {
    flex: 1;
    font-family: 'Courier New', Courier, monospace;
    font-size: .9375rem;
    letter-spacing: .04em;
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    padding: .6rem .9rem;
    color: var(--color-text);
    cursor: text;
    min-width: 0;
}
.password-output:focus {
    outline: none;
    border-color: var(--color-border-focus);
    box-shadow: 0 0 0 3px var(--color-primary-light);
}
.btn-copy {
    flex-shrink: 0;
    padding: .55rem 1.1rem;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    font-size: .875rem;
    font-weight: 600;
    color: var(--color-text);
    cursor: pointer;
    transition: background .15s, border-color .15s;
}
.btn-copy:hover {
    background: var(--color-primary-light);
    border-color: var(--color-primary);
    color: var(--color-primary);
}
.btn-copy:disabled {
    background: var(--color-success-bg);
    border-color: var(--color-success-border);
    color: var(--color-success);
    cursor: default;
}
.password-strength-badge {
    flex-shrink: 0;
    padding: .2rem .6rem;
    border-radius: 6px;
    font-size: .75rem;
    font-weight: 700;
    white-space: nowrap;
}
.strength-weak    { background: var(--color-error-bg);   color: var(--color-error); }
.strength-fair    { background: var(--color-warning-bg);  color: var(--color-warning); }
.strength-strong  { background: var(--color-primary-light); color: var(--color-primary); }
.strength-vstrong { background: var(--color-success-bg);  color: var(--color-success); }
.checkbox-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: .5rem .75rem;
    margin-top: .35rem;
}
.checkbox-label {
    display: flex;
    align-items: center;
    gap: .45rem;
    font-size: .9rem;
    color: var(--color-text);
    cursor: pointer;
}
.checkbox-label input[type="checkbox"] {
    width: 1rem;
    height: 1rem;
    accent-color: var(--color-primary);
    cursor: pointer;
    flex-shrink: 0;
}
.range-wrapper {
    display: flex;
    align-items: center;
    gap: .75rem;
    margin-top: .35rem;
}
.range-wrapper input[type="range"] {
    flex: 1;
    accent-color: var(--color-primary);
}
.range-value {
    font-size: .875rem;
    font-weight: 600;
    color: var(--color-primary);
    min-width: 2.5rem;
    text-align: right;
}
.form-select {
    width: 100%;
    padding: .6rem .9rem;
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    background: var(--color-bg);
    color: var(--color-text);
    font-size: .9375rem;
}
.form-select:focus {
    outline: none;
    border-color: var(--color-border-focus);
    box-shadow: 0 0 0 3px var(--color-primary-light);
}
@media (max-width: 479px) {
    .password-result-row    { flex-wrap: wrap; }
    .password-strength-badge { order: -1; }
    .checkbox-grid          { grid-template-columns: 1fr; }
}