:root {
  --bg: #0b0f1a;
  --card: rgba(255,255,255,0.08);
  --text: #e6e6eb;
  --accent: #4f8cff;
  --border: rgba(255,255,255,0.15);
}

[data-theme="light"] {
  --bg: #f5f7fb;
  --card: #ffffff;
  --text: #111;
  --border: #ddd;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: Inter, system-ui, sans-serif;
  background: var(--bg);
  color: var(--text);
}

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

h1 { font-size: 2.2rem; }

.container {
  max-width: 1200px;
  margin: auto;
  padding: 20px;
}

.tool-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit,minmax(260px,1fr));
  gap: 20px;
}

.tool-card {
  background: var(--card);
  backdrop-filter: blur(12px);
  padding: 20px;
  border-radius: 16px;
  border: 1px solid var(--border);
  transition: transform .2s, box-shadow .2s;
}

.tool-card:hover { transform: translateY(-6px); box-shadow: 0 10px 30px rgba(0,0,0,0.25); }

a { color: var(--accent); text-decoration: none; }

/* ===== HERO & CTA ===== */
.hero {
  display: flex;
  gap: 24px;
  align-items: center;
  margin-bottom: 32px;
  padding: 24px;
  background: linear-gradient(135deg, rgba(79,140,255,0.06), transparent);
  border-radius: 14px;
}

.hero-left { flex: 1; }
.hero-right { width: 260px; }

.hero-ctas { margin-top: 14px; }

.btn { display: inline-block; padding: 10px 14px; border-radius: 10px; background: rgba(79,140,255,0.06); border: 1px solid var(--border); color: var(--accent); text-decoration: none; margin-right: 10px; }
.btn.primary { background: var(--accent); color: white; border: none; box-shadow: 0 8px 24px rgba(79,140,255,0.12); }

.badge { background: var(--accent); color: white; padding: 4px 8px; border-radius: 999px; font-size: 0.8rem; margin-left: 8px; }

.tool-features { list-style: none; padding: 0; margin: 12px 0 0; color: var(--text); font-size: 0.95rem; }
.tool-features li { margin-bottom: 6px; color: inherit; }

.hero-features { list-style: none; display: flex; gap: 12px; padding: 0; margin-top: 14px; }
.hero-features li { padding: 8px 12px; background: rgba(255,255,255,0.02); border-radius: 10px; font-size: 0.9rem; color: var(--text); }

.tools-section h2, .how h2 { margin-top: 40px; font-size: 1.4rem; }

.how .steps { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 12px; margin-top: 16px; }
.step { padding: 16px; background: rgba(255,255,255,0.02); border-radius: 12px; border: 1px solid var(--border); }

.quick-links a { display: block; padding: 10px 12px; margin-bottom: 8px; border-radius: 10px; background: rgba(255,255,255,0.02); color: var(--text); text-decoration: none; }

/* ===== ANIMATIONS ===== */
.animate-up { opacity: 0; transform: translateY(8px); transition: transform .6s cubic-bezier(.2,.8,.2,1), opacity .6s ease; }
.animate-up.visible { opacity: 1; transform: translateY(0); }

/* page entrance */
.page-enter { opacity: 0; transform: translateY(6px) scale(.995); transition: opacity .45s ease, transform .45s cubic-bezier(.2,.8,.2,1); }
.page-enter.visible { opacity: 1; transform: translateY(0) scale(1); }

/* result flash animation */
.result-box.flash { animation: pulse 900ms ease; box-shadow: 0 8px 30px rgba(79,140,255,0.08); }
@keyframes pulse { 0% { transform: translateY(0) } 40% { transform: translateY(-6px) scale(1.01) } 100% { transform: translateY(0) } }

@media (max-width: 720px) {
  .hero { flex-direction: column; align-items: stretch; }
  .hero-right { width: 100%; }
}

/* Toast */
#siteToast { position: fixed; right: 20px; bottom: 28px; background: rgba(0,0,0,0.8); color: white; padding: 10px 14px; border-radius: 8px; font-size: 0.95rem; opacity: 0; transform: translateY(8px); transition: opacity .18s ease, transform .18s ease; z-index: 9999; }
#siteToast.visible { opacity: 1; transform: translateY(0); }
[data-theme="light"] #siteToast { background: rgba(0,0,0,0.85); color: white; }

textarea, select, input {
  width: 100%;
  padding: 12px;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: transparent;
  color: var(--text);
}

/* Validation state for JSON input */
textarea.input-error {
  border-color: #ff6b6b;
  box-shadow: 0 6px 18px rgba(255,107,107,0.06);
}
[data-theme="light"] textarea.input-error {
  border-color: #d9534f;
}

button {
  margin-top: 10px;
  padding: 12px 16px;
  border-radius: 10px;
  border: none;
  background: var(--accent);
  color: white;
  cursor: pointer;
}

/* TOOL UI HELPERS */
.tool-controls { display:flex; gap:12px; align-items:center; margin-top:12px; flex-wrap:wrap; }
.inline-btn { background: transparent; border: 1px solid var(--border); color: var(--text); padding:8px 10px; border-radius:8px; cursor:pointer; }

/* Mouse Click Test UI */
.controls-row { display:flex; gap:12px; align-items:center; justify-content:space-between; flex-wrap:wrap; }
.duration-select label { margin-right:12px; cursor:pointer; color:var(--text); }
.duration-select input { margin-right:6px; }
.click-area { margin-top:20px; background: rgba(255,255,255,0.02); border:1px solid var(--border); border-radius:14px; padding:36px; text-align:center; font-size:1.25rem; user-select:none; cursor:pointer; transition: transform .06s ease, box-shadow .12s ease; }
.click-area.active { background: linear-gradient(90deg, rgba(79,140,255,0.08), rgba(79,140,255,0.02)); box-shadow: 0 12px 30px rgba(79,140,255,0.06); transform: translateY(-2px); }
.click-area.countdown { font-size:2.5rem; font-weight:700; }
.click-area.pulse { transform: scale(0.98); }
.stats-row { display:flex; gap:20px; justify-content:center; margin-top:16px; }
.stat { text-align:center; min-width:90px; }
.stat-value { font-size:1.6rem; font-weight:700; color:var(--accent); }
.stat-label { font-size:0.9rem; color:var(--text); opacity:0.85; margin-top:6px; }
@media (max-width:720px) { .controls-row { flex-direction:column; align-items:stretch; } .stats-row { flex-wrap:wrap; gap:12px; } .click-area { padding:24px; } }
.inline-btn.ghost { background: transparent; }
.result-box { margin-top:14px; padding:14px; border-radius:10px; background: rgba(255,255,255,0.02); border:1px solid var(--border); font-size:1rem; }
.result-box strong { display:block; margin-bottom:8px; }
.error { color: #ffb4b4; background: rgba(255,180,180,0.03); border: 1px solid rgba(255,80,80,0.12); padding: 10px; border-radius:8px; }
.muted { color: rgba(255,255,255,0.78); font-size:0.95rem; }
[data-theme="light"] .muted { color: rgba(0,0,0,0.65); }

.result-box { color: var(--text); }
.copy-btn { background: rgba(255,255,255,0.03); border:1px solid var(--border); color: var(--text); padding:8px 10px; border-radius:8px; cursor:pointer; }
.input-grid { display:grid; grid-template-columns: 1fr 140px; gap:12px; align-items:center; }
@media (max-width:720px) { .input-grid { grid-template-columns: 1fr; } }

/* ===== HEADER & NAV ===== */

.site-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 18px 28px;
  border-bottom: 1px solid var(--border);
}

.brand {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text);
  display: inline-flex;
  align-items: center;
  gap: 0;
}

.brand-icon {
  width: 48px;
  height: 48px;
  object-fit: contain;
  vertical-align: middle;
  margin-right: 8px;
}

.brand .brand-highlight {
  color: var(--accent);
}

nav a {
  margin: 0 12px;
  font-size: 0.95rem;
  color: var(--text);
  opacity: 0.85;
}

nav a:hover {
  opacity: 1;
  color: var(--accent);
}

/* Navigation Dropdown */
.nav-dropdown {
  position: relative;
  display: inline-block;
}

.dropdown-toggle {
  cursor: pointer;
  user-select: none;
}

.dropdown-arrow {
  font-size: 0.7em;
  margin-left: 4px;
  display: inline-block;
  transition: transform 0.2s ease;
}

.nav-dropdown.active .dropdown-arrow {
  transform: rotate(180deg);
}

.dropdown-menu {
  position: absolute;
  top: 100%;
  left: 0;
  margin-top: 8px;
  min-width: 200px;
  background: rgba(11, 15, 26, 0.92);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--border);
  border-radius: 10px;
  box-shadow: 0 8px 24px rgba(0,0,0,0.25);
  opacity: 0;
  visibility: hidden;
  transform: translateY(-10px);
  transition: opacity 0.2s ease, transform 0.2s ease, visibility 0.2s;
  z-index: 1000;
  padding: 8px 0;
}
[data-theme="light"] .dropdown-menu {
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
}

.nav-dropdown.active .dropdown-menu {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.dropdown-menu a {
  display: block;
  padding: 10px 16px;
  margin: 0;
  color: var(--text);
  text-decoration: none;
  transition: background 0.15s ease, color 0.15s ease;
  border-radius: 0;
}

.dropdown-menu a:hover {
  background: rgba(79,140,255,0.1);
  color: var(--accent);
  opacity: 1;
}

.dropdown-menu a:first-child {
  border-top-left-radius: 10px;
  border-top-right-radius: 10px;
}

.dropdown-menu a:last-child {
  border-bottom-left-radius: 10px;
  border-bottom-right-radius: 10px;
}

/* Close dropdown when clicking outside */
@media (max-width: 720px) {
  .dropdown-menu {
    min-width: 180px;
    left: auto;
    right: 0;
  }
  
  nav {
    flex-wrap: wrap;
  }
  
  .nav-dropdown {
    width: 100%;
  }
  
  .dropdown-toggle {
    width: 100%;
    text-align: left;
  }
}

/* Blog posts list & professional cards */
.posts-list { display: block; margin-top: 18px; }
.post-card { display:flex; gap:16px; align-items:flex-start; padding: 16px; border-radius: 12px; border: 1px solid var(--border); background: var(--card); color: var(--text); transition: transform .18s ease, box-shadow .18s ease; }
.post-card:hover { transform: translateY(-6px); box-shadow: 0 10px 24px rgba(0,0,0,0.08); }
.post-card img { width:120px; height:auto; border-radius:8px; flex-shrink:0; }
.post-card .content { flex: 1; }
.post-card h2 { margin:0; font-size:1.15rem; }
.post-card .excerpt { margin:8px 0 0; color: var(--text); opacity:0.92; }
.post-card .meta { margin-top:12px; display:flex; justify-content:space-between; align-items:center; color: var(--text); opacity:0.85; font-size:0.95rem; }
.read-btn { background: transparent; border: 1px solid var(--border); color: var(--text); padding:8px 12px; border-radius:8px; text-decoration:none; }
.read-btn:hover { background: rgba(79,140,255,0.06); color: var(--accent); border-color: var(--accent); }

/* ensure links inside cards inherit readable color */
.post-card a, .post-card a * { color: var(--text); }

@media (max-width:720px) {
  .post-card { flex-direction: column; }
  .post-card img { width:100%; max-width:420px; }
  .post-card .meta { flex-direction:column; align-items:flex-start; gap:8px; }
} 


/* ===== RESPONSIVE IMPROVEMENTS ===== */

/* Improve layout and controls for tablet and mobile widths */
@media (max-width: 920px) {
  .container { padding: 16px; }
  .hero { padding: 16px; gap: 16px; }
  .hero-left h1 { font-size: 1.6rem; }
  .tool-card { padding: 16px; border-radius: 12px; }
  textarea, input, select, button { font-size: 0.98rem; }
  .tool-controls { flex-direction: column; align-items: stretch; gap:10px; }
  .tool-controls > * { width: 100% !important; }
  .btn, button, .inline-btn, .copy-btn { width: 100%; }
  .input-grid { grid-template-columns: 1fr; }
  .stats-row { flex-direction: row; gap:12px; justify-content: space-around; }
  .click-area { padding: 24px; font-size: 1.05rem; min-height: 120px; }
  .post-card { flex-direction: column; }
}

@media (max-width: 480px) {
  html { font-size: 15px; }
  h1 { font-size: 1.6rem; }
  .hero-left h1 { font-size: 1.4rem; }
  .stat-value { font-size: 1.25rem; }
  .click-area { padding: 18px; font-size: 1rem; min-height: 100px; }
  .tool-grid { grid-template-columns: 1fr; }
  nav a { display:block; margin:6px 0; }
  .dropdown-menu { min-width: 160px; right: 0; left: auto; }
  .tool-features { font-size: 0.95rem; }
}

/* Ensure inputs are comfortable to tap on mobile and can be resized vertically */
textarea { min-height: 120px; resize: vertical; }
@media (max-width: 720px) { textarea { min-height: 90px; } }

/* subtle improvements for small tool cards */
.tool-card { transition: transform .15s, box-shadow .15s; }

/* Mobile menu toggle & sidebar */
.menu-toggle { display: none; background: transparent; border: 1px solid var(--border); padding: 8px 10px; border-radius: 8px; font-size: 1.1rem; color: var(--text); }
.site-left { display:flex; gap:12px; align-items:center; }
.mobile-menu { position: fixed; left: 0; top: 0; bottom: 0; width: 280px; max-width: 90%; background: rgba(11, 15, 26, 0.94); backdrop-filter: blur(20px); -webkit-backdrop-filter: blur(20px); color: var(--text); border-right: 1px solid var(--border); box-shadow: 8px 0 30px rgba(0,0,0,0.35); transform: translateX(-110%); transition: transform .28s ease; z-index: 1200; padding: 18px; display: flex; flex-direction: column; gap:12px; }
[data-theme="light"] .mobile-menu { background: rgba(255, 255, 255, 0.96); backdrop-filter: blur(20px); -webkit-backdrop-filter: blur(20px); }
.mobile-menu .mobile-nav { overflow:auto; flex: 1 1 auto; }
.mobile-menu .mobile-nav a { color: var(--text) !important; display:block; padding: 10px 8px; text-decoration: none; }
.mobile-menu .mobile-nav a svg { vertical-align: middle; margin-right:8px; fill: currentColor; }
.mobile-menu .mobile-nav .muted { color: rgba(255,255,255,0.6); }
.mobile-nav-label { display: block; font-size: 0.75rem; font-weight: 600; text-transform: uppercase; letter-spacing: 0.06em; color: var(--accent); margin: 14px 8px 6px; padding: 0; }
[data-theme="light"] .mobile-nav-label { color: var(--accent); }
/* Sidebar: Tools expandable block */
.mobile-tools-toggle { display: flex; align-items: center; justify-content: flex-start; width: calc(100% - 16px); padding: 12px 8px; margin: 0 8px; border: none; border-radius: 8px; background: transparent; color: var(--text); font-size: 1rem; font-family: inherit; cursor: pointer; text-align: left; position: relative; }
.mobile-tools-toggle:hover { background: rgba(79,140,255,0.06); color: var(--accent); }
.mobile-tools-toggle .arrow { font-size: 0.7em; transition: transform 0.2s ease; flex-shrink: 0; margin-left: auto; }
.mobile-tools-toggle.expanded .arrow { transform: rotate(180deg); }
.mobile-tools-sub { overflow: hidden; padding-left: 0; background: rgba(79,140,255,0.04); border-radius: 8px; margin: 8px 8px; }
.mobile-tools-sub.expanded { background: rgba(79,140,255,0.06); }
.mobile-tools-sub a { display: block; padding: 12px 8px; color: var(--text); text-decoration: none; border-radius: 4px; margin: 0; }
.mobile-tools-sub a:hover { background: rgba(79,140,255,0.08); color: var(--accent); }
.mobile-tools-sub.collapsed { display: none; }

.mobile-menu.open { transform: translateX(0); }
.mobile-menu .menu-close { align-self: flex-end; background: transparent; border: none; font-size: 1.15rem; color: var(--text); }
.mobile-menu .mobile-nav a { display: block; padding: 12px 8px; color: var(--text); text-decoration: none; border-radius: 8px; background: transparent; outline: none; border: none; text-align: left; }
.mobile-menu .mobile-nav a:visited { color: var(--text); background: transparent; outline: none; border: none; }
.mobile-menu .mobile-nav a:hover { background: rgba(79,140,255,0.06); color: var(--accent); outline: none; border: none; }
.mobile-menu .mobile-nav a:focus { outline: none; border: none; }
.mobile-menu .mobile-nav a:focus-visible { outline: 2px solid rgba(79,140,255,0.12); }
.mobile-menu-backdrop { position: fixed; inset: 0; background: rgba(0,0,0,0.35); z-index:1190; opacity: 0; transition: opacity .18s ease; }
.mobile-menu-backdrop.visible { opacity: 1; }

@media (max-width: 720px) {
  /* Hide only the desktop nav bar; keep .mobile-nav visible inside #mobileMenu sidebar */
  .site-header > nav { display: none; }
  .menu-toggle { display: inline-flex; align-items:center; justify-content:center; }
}

/* ===== THEME TOGGLE ===== */

.theme-toggle {
  cursor: pointer;
  font-size: 1.3rem;
  user-select: none;
}

/* Page header (tool pages) */
.page-header { text-align: center; max-width: 900px; margin: 12px auto 8px; }
.page-header p { margin-top:8px; }

/* QR preview and download styling */
#qrResult canvas, #qrResult img { display: block; margin: 0 auto; border-radius: 8px; max-width: 100%; height: auto; }
#qrResult .btn { margin: 8px auto 0; display: block; max-width: 260px; text-align:center; width: 100%; box-sizing: border-box; }
#qrResult .btn.primary { background: var(--accent); color: white; border: none; box-shadow: 0 8px 20px rgba(79,140,255,0.12); }
#qrResult .btn:not(.primary) { background: transparent; border: 1px solid var(--border); color: var(--text); }
[data-theme="light"] #qrResult .btn.primary { background: var(--accent); color: white; }

/* JSON output area responsiveness */
#output { max-height: min(60vh, 480px); overflow: auto; word-break: break-word; white-space: pre-wrap; padding: 12px; }
@media (max-width:720px) { #output { max-height: 40vh; } }

/* Dropdown menu scroll */
.dropdown-menu { max-height: 50vh; overflow-y: auto; padding-right: 8px; }

/* Small fixes for result-box spacing */
.result-box { padding: 12px; }
@media (max-width:480px) { .result-box { padding: 10px; font-size: 0.95rem; } }

/* Click area centering and limit */
.click-area { max-width: 820px; margin-left: auto; margin-right: auto; }

/* ensure tool-control children can shrink on small screens */
.tool-controls > * { min-width: 0; }



.icon { width: 1.15em; height: 1.15em; vertical-align: middle; display: inline-block; fill: currentColor; margin-right: 8px; }
.theme-icon { width: 1.6rem; height: 1.6rem; }
.tool-icon { width: 1.15rem; height: 1.15rem; margin-right: 8px; color: var(--accent); }
.quick-links .icon { margin-right: 10px; color: var(--text); }

/* ===== FOOTER ===== */

footer {
  margin-top: 80px;
  padding: 30px;
  text-align: center;
  border-top: 1px solid var(--border);
  font-size: 0.9rem;
  opacity: 0.8;
}