/* ============================================================
   Online Tools — Theme & Layout
   Modern indigo/violet palette, responsive, mobile-first.
   ============================================================ */

/* ---------- Brand palette ---------- */
:root {
  --brand:        #6366f1;   /* indigo-500 */
  --brand-rgb:    99, 102, 241;
  --brand-hover:  #4f46e5;
  --brand-active: #4338ca;
  --brand-2:      #8b5cf6;   /* violet-500 */
  --gradient: linear-gradient(135deg, #6366f1 0%, #8b5cf6 55%, #a855f7 100%);

  --sidebar-width: 280px;
  --navbar-height: 62px;
  --radius: 0.85rem;

  /* Map Bootstrap primary -> brand */
  --bs-primary: var(--brand);
  --bs-primary-rgb: var(--brand-rgb);
  --bs-link-color: var(--brand);
  --bs-link-color-rgb: var(--brand-rgb);
  --bs-link-hover-color: var(--brand-hover);
  --bs-border-radius: var(--radius);
  --bs-focus-ring-color: rgba(var(--brand-rgb), 0.3);
}

/* ---------- Light / Dark surfaces ---------- */
[data-bs-theme="light"] {
  --bs-body-bg: #f4f5fb;
  --bs-body-color: #1e2430;
  --bs-secondary-bg: #eceef6;
  --bs-tertiary-bg: #e6e9f4;
  --bs-border-color: #e1e4f0;
  --bs-card-bg: #ffffff;
  --surface: #ffffff;
  --navbar-bg: rgba(255, 255, 255, 0.82);
}
[data-bs-theme="dark"] {
  --bs-body-bg: #0b1020;
  --bs-body-color: #e6e8f0;
  --bs-secondary-bg: #161d33;
  --bs-tertiary-bg: #1a2240;
  --bs-border-color: #232b45;
  --bs-card-bg: #131a2e;
  --surface: #131a2e;
  --navbar-bg: rgba(13, 18, 35, 0.82);
}

body {
  min-height: 100vh;
  overflow-x: hidden;
  background:
    radial-gradient(1200px 600px at 100% -10%, rgba(139, 92, 246, 0.10), transparent 60%),
    radial-gradient(900px 500px at -10% 0%, rgba(99, 102, 241, 0.10), transparent 55%),
    var(--bs-body-bg);
  background-attachment: fixed;
}

/* ---------- Buttons recolor ---------- */
.btn-primary {
  --bs-btn-bg: var(--brand);
  --bs-btn-border-color: var(--brand);
  --bs-btn-hover-bg: var(--brand-hover);
  --bs-btn-hover-border-color: var(--brand-hover);
  --bs-btn-active-bg: var(--brand-active);
  --bs-btn-active-border-color: var(--brand-active);
  --bs-btn-disabled-bg: var(--brand);
  --bs-btn-disabled-border-color: var(--brand);
  box-shadow: 0 4px 14px rgba(var(--brand-rgb), 0.30);
}
.btn-outline-primary {
  --bs-btn-color: var(--brand);
  --bs-btn-border-color: var(--brand);
  --bs-btn-hover-bg: var(--brand);
  --bs-btn-hover-border-color: var(--brand);
  --bs-btn-active-bg: var(--brand-active);
  --bs-btn-active-border-color: var(--brand-active);
}
.btn { border-radius: 0.6rem; font-weight: 500; }
.btn-sm { border-radius: 0.5rem; }
.form-control, .form-select { border-radius: 0.6rem; }
.form-control:focus, .form-select:focus {
  border-color: var(--brand);
  box-shadow: 0 0 0 0.2rem rgba(var(--brand-rgb), 0.25);
}
.text-primary { color: var(--brand) !important; }
.form-range::-webkit-slider-thumb { background: var(--brand); }
.form-range::-moz-range-thumb { background: var(--brand); }
.form-check-input:checked { background-color: var(--brand); border-color: var(--brand); }
.progress { background-color: var(--bs-tertiary-bg); }

/* ============================================================
   Navbar
   ============================================================ */
.app-navbar {
  min-height: var(--navbar-height);
  background-color: var(--navbar-bg);
  -webkit-backdrop-filter: saturate(180%) blur(12px);
  backdrop-filter: saturate(180%) blur(12px);
  border-bottom: 1px solid var(--bs-border-color);
  z-index: 1040;
}
.navbar-brand {
  font-size: 1.15rem;
  letter-spacing: -0.01em;
}
.brand-text {
  background: var(--gradient);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: transparent;
}
.navbar-brand .bi-tools { color: var(--brand); }
.brand-logo {
  border-radius: 8px;
  box-shadow: 0 3px 10px rgba(var(--brand-rgb), 0.35);
  display: block;
}
.search-icon {
  position: absolute;
  top: 50%;
  left: 0.9rem;
  transform: translateY(-50%);
  color: var(--bs-secondary-color);
  pointer-events: none;
}
#globalSearch {
  border-radius: 999px;
  background-color: var(--bs-secondary-bg);
  border-color: transparent;
}
#globalSearch:focus { background-color: var(--surface); }

.icon-btn {
  --bs-btn-border-color: var(--bs-border-color);
  border-radius: 0.6rem;
}

/* ============================================================
   Layout
   ============================================================ */
.app-layout { display: flex; align-items: flex-start; }
.app-sidebar { width: var(--sidebar-width); }

@media (min-width: 992px) {
  .app-sidebar {
    position: sticky;
    top: var(--navbar-height);
    height: calc(100vh - var(--navbar-height));
    overflow-y: auto;
    border-right: 1px solid var(--bs-border-color);
    flex: 0 0 var(--sidebar-width);
    background-color: transparent;
  }
}
/* Mobile offcanvas surface */
.app-sidebar.offcanvas-lg { background-color: var(--surface); }

/* Home (landing) mode — full-width front page, no tools sidebar.
   The sidebar appears only on the Tools section. */
.home-mode .app-sidebar { display: none !important; }
.home-mode .tools-mobile-toggle { display: none !important; }
.home-mode .app-main > .container-fluid { max-width: 1140px; margin-inline: auto; }

/* ============================================================
   Header nav tabs
   ============================================================ */
.app-navbar .nav-link {
  font-weight: 500;
  color: var(--bs-body-color);
  border-radius: 0.5rem;
  padding: 0.4rem 0.85rem;
}
.app-navbar .nav-link:hover { color: var(--brand); background-color: var(--bs-secondary-bg); }
.app-navbar .nav-link.active { color: #fff; background: var(--gradient); }

/* ============================================================
   Landing sections (Home)
   ============================================================ */

/* ---- Hero ---- */
.hero { position: relative; padding: 1.5rem 0 1rem; }
.hero-title { font-size: clamp(2rem, 5vw, 3.1rem); font-weight: 800; line-height: 1.1; letter-spacing: -0.02em; }
.hero-lead { font-size: 1.1rem; color: var(--bs-secondary-color); max-width: 540px; }
.text-grad {
  background: var(--gradient);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: transparent;
}
.hero-badge {
  display: inline-flex; align-items: center; gap: 0.4rem;
  padding: 0.4rem 0.9rem; border-radius: 999px;
  font-size: 0.82rem; font-weight: 600; color: var(--brand);
  background: rgba(var(--brand-rgb), 0.12);
  border: 1px solid rgba(var(--brand-rgb), 0.25);
}
.trust-row { display: flex; flex-wrap: wrap; gap: 0.75rem 1.25rem; font-size: 0.88rem; color: var(--bs-secondary-color); }

/* Hero preview card */
.hero-preview {
  background: var(--surface);
  border: 1px solid var(--bs-border-color);
  border-radius: 1.25rem;
  box-shadow: 0 24px 50px rgba(var(--brand-rgb), 0.18);
  overflow: hidden;
  max-width: 420px;
  margin-inline: auto;
  animation: float 7s ease-in-out infinite;
}
.hero-preview-bar {
  display: flex; align-items: center; gap: 0.4rem;
  padding: 0.7rem 1rem; border-bottom: 1px solid var(--bs-border-color);
  background: var(--bs-secondary-bg);
}
.hero-preview-bar > span { width: 0.62rem; height: 0.62rem; border-radius: 50%; }
.hero-preview-bar > span:nth-child(1) { background: #ff5f57; }
.hero-preview-bar > span:nth-child(2) { background: #febc2e; }
.hero-preview-bar > span:nth-child(3) { background: #28c840; }
.preview-tile {
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  gap: 0.45rem; aspect-ratio: 1; border-radius: 0.9rem;
  background: var(--bs-secondary-bg); color: var(--bs-body-color);
  text-decoration: none; font-size: 0.72rem; font-weight: 600; text-align: center;
  transition: transform 0.12s ease, background-color 0.12s ease, color 0.12s ease;
}
.preview-tile:hover { transform: translateY(-3px); background: var(--bs-tertiary-bg); color: var(--brand); }
.preview-tile i {
  font-size: 1.55rem;
  background: var(--gradient);
  -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent;
}

@keyframes float { 0%, 100% { transform: translateY(0); } 50% { transform: translateY(-12px); } }

/* ---- Stats band ---- */
.stats-band {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 1rem; text-align: center;
  background: var(--surface); border: 1px solid var(--bs-border-color);
  border-radius: 1rem; padding: 1.5rem 1rem; margin: 1.75rem 0;
}
.stat-num { font-size: clamp(1.5rem, 4vw, 2.1rem); font-weight: 800; line-height: 1; }
.stat-label { font-size: 0.85rem; color: var(--bs-secondary-color); margin-top: 0.25rem; }
@media (max-width: 575.98px) { .stats-band { grid-template-columns: repeat(2, 1fr); } }

/* ---- Section titles ---- */
.section-title { font-weight: 800; letter-spacing: -0.02em; }

/* ---- Feature cards ---- */
.feature-card { border: 1px solid var(--bs-border-color); transition: transform 0.14s ease, box-shadow 0.14s ease, border-color 0.14s ease; }
.feature-card:hover { transform: translateY(-4px); box-shadow: 0 0.75rem 1.75rem rgba(var(--brand-rgb), 0.18); border-color: rgba(var(--brand-rgb), 0.5); }

/* ---- Author + CTA ---- */
.author-card { border: 1px solid var(--bs-border-color); }
.author-avatar {
  width: 150px; height: 150px; border-radius: 1.1rem; object-fit: cover;
  box-shadow: 0 10px 28px rgba(var(--brand-rgb), 0.35);
}
.cta-banner {
  background: var(--gradient); color: #fff; border-radius: 1.2rem;
  padding: 2.5rem 1.5rem; box-shadow: 0 14px 40px rgba(var(--brand-rgb), 0.35);
}

/* ---- Reveal on scroll ---- */
.reveal { opacity: 0; transform: translateY(18px); transition: opacity 0.55s ease, transform 0.55s ease; }
.reveal.in { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; transition: none; }
  .hero-preview { animation: none; }
}

/* ============================================================
   Footer
   ============================================================ */
.footer-links li { margin-bottom: 0.4rem; }
.footer-links a { color: var(--bs-secondary-color); text-decoration: none; }
.footer-links a:hover { color: var(--brand); }

.app-main {
  flex: 1 1 auto;
  min-width: 0;
  display: flex;
  flex-direction: column;
  min-height: calc(100vh - var(--navbar-height));
}
.app-main > .container-fluid { max-width: 1200px; }
.app-footer {
  margin-top: auto;
  border-top: 1px solid var(--bs-border-color);
}

/* ============================================================
   Sidebar nav
   ============================================================ */
.sidebar-nav { padding: 0.75rem 0.6rem 2.5rem; }
.sidebar-cat {
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--bs-secondary-color);
  padding: 1rem 0.85rem 0.4rem;
}
.sidebar-link {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  padding: 0.6rem 0.85rem;
  border-radius: 0.6rem;
  color: var(--bs-body-color);
  text-decoration: none;
  font-size: 0.92rem;
  font-weight: 500;
  transition: background-color 0.13s ease, color 0.13s ease;
}
.sidebar-link:hover { background-color: var(--bs-secondary-bg); }
.sidebar-link.active {
  background: var(--gradient);
  color: #fff;
  box-shadow: 0 6px 16px rgba(var(--brand-rgb), 0.35);
}
.sidebar-link i { font-size: 1.05rem; width: 1.2rem; text-align: center; }
.sidebar-empty {
  padding: 1rem 0.85rem;
  color: var(--bs-secondary-color);
  font-size: 0.9rem;
}

/* ============================================================
   Home hero + tool cards
   ============================================================ */
.home-hero {
  background: var(--gradient);
  color: #fff;
  border-radius: 1.2rem;
  padding: 2.25rem 1.75rem;
  margin-bottom: 1.75rem;
  box-shadow: 0 14px 40px rgba(var(--brand-rgb), 0.35);
  position: relative;
  overflow: hidden;
}
.home-hero::after {
  content: "";
  position: absolute;
  right: -40px; top: -60px;
  width: 220px; height: 220px;
  background: radial-gradient(circle, rgba(255,255,255,0.25), transparent 70%);
  pointer-events: none;
}
.home-hero h1 { font-weight: 800; letter-spacing: -0.02em; }
.home-hero .badge {
  background: rgba(255,255,255,0.2);
  font-weight: 600;
}

.cat-title {
  font-weight: 700;
  letter-spacing: -0.01em;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}
.cat-title::before {
  content: "";
  width: 4px; height: 1.1em;
  border-radius: 4px;
  background: var(--gradient);
  display: inline-block;
}

.tool-card {
  height: 100%;
  text-decoration: none;
  color: inherit;
  background-color: var(--bs-card-bg);
  border: 1px solid var(--bs-border-color);
  border-radius: var(--radius);
  transition: transform 0.14s ease, box-shadow 0.14s ease, border-color 0.14s ease;
}
.tool-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 0.75rem 1.75rem rgba(var(--brand-rgb), 0.20);
  border-color: rgba(var(--brand-rgb), 0.6);
}
.tool-card .tool-icon {
  font-size: 1.35rem;
  color: #fff;
  width: 2.6rem; height: 2.6rem;
  display: inline-flex;
  align-items: center; justify-content: center;
  border-radius: 0.7rem;
  background: var(--gradient);
  flex: 0 0 auto;
  box-shadow: 0 4px 12px rgba(var(--brand-rgb), 0.35);
}

/* ============================================================
   Tool view
   ============================================================ */
.tool-header h1 { font-size: 1.55rem; font-weight: 800; letter-spacing: -0.02em; }
.tool-header .bi {
  background: var(--gradient);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}
.field-label { font-weight: 600; font-size: 0.82rem; color: var(--bs-secondary-color); }
textarea.code, .output-box, .code { font-family: var(--bs-font-monospace); font-size: 0.9rem; }
.output-box {
  white-space: pre-wrap;
  word-break: break-word;
  background-color: var(--bs-secondary-bg);
  border: 1px solid var(--bs-border-color);
  border-radius: 0.6rem;
  padding: 0.8rem 1rem;
  min-height: 3rem;
}
.card { border-radius: var(--radius); border-color: var(--bs-border-color); }
#qrcode {
  display: inline-block;
  padding: 1rem;
  background: #fff;
  border-radius: var(--radius);
  box-shadow: 0 6px 20px rgba(0,0,0,0.12);
}

/* ============================================================
   Mobile refinements
   ============================================================ */
@media (max-width: 991.98px) {
  .app-sidebar { width: min(86vw, 320px); }
}
@media (max-width: 575.98px) {
  :root { --navbar-height: 58px; }
  .app-main > .container-fluid { padding-left: 0.9rem; padding-right: 0.9rem; padding-top: 1rem; }
  .tool-header h1 { font-size: 1.25rem; }
  .home-hero { padding: 1.6rem 1.25rem; border-radius: 1rem; }
  .home-hero h1 { font-size: 1.5rem; }
  /* Full-width action buttons stack nicely on phones */
  .tool-body .btn { flex: 1 1 auto; }
  .navbar-brand { font-size: 1.05rem; }
  /* Larger touch targets */
  .sidebar-link { padding: 0.7rem 0.9rem; font-size: 0.98rem; }
}

/* Smooth theme transition */
body, .app-navbar, .tool-card, .card, .sidebar-link, .output-box {
  transition: background-color 0.2s ease, border-color 0.2s ease, color 0.2s ease;
}