/* ═══════════════════════════════════════════════════════════════
   ABC Tools — home.css
   Shared styles for Home page, Tool pages, Info sections, Ads
   Works alongside existing style.css on tool pages
═══════════════════════════════════════════════════════════════ */

/* ── Reset & Base ──────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body { font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif; }
a { text-decoration: none; color: inherit; }
button { cursor: pointer; font-family: inherit; }
img { max-width: 100%; }

/* ── CSS Variables ─────────────────────────────────────────── */
:root {
  --clr-bg:        #f0f2f5;
  --clr-surface:   #ffffff;
  --clr-surface2:  #f8f9fa;
  --clr-border:    #e2e5ea;
  --clr-border2:   #d0d4dc;
  --clr-text:      #1a1d23;
  --clr-text2:     #6b7280;
  --clr-text3:     #9ca3af;
  --clr-accent:    #4f46e5;
  --clr-accent-h:  #4338ca;
  --clr-accent-lt: rgba(79,70,229,0.08);
  --clr-success:   #16a34a;
  --clr-error:     #dc2626;
  --clr-warn:      #d97706;
  --clr-header:    #0f172a;
  --clr-header-t:  #f8fafc;
  --shadow-sm:  0 1px 3px rgba(0,0,0,0.08);
  --shadow-md:  0 4px 12px rgba(0,0,0,0.08);
  --shadow-lg:  0 8px 32px rgba(0,0,0,0.12);
  --radius:     8px;
  --radius-sm:  5px;
  --radius-lg:  14px;
  --trans:      0.18s ease;
  --header-h:   58px;
}

[data-theme="dark"] {
  --clr-bg:        #0d1117;
  --clr-surface:   #161b22;
  --clr-surface2:  #0d1117;
  --clr-border:    #30363d;
  --clr-border2:   #21262d;
  --clr-text:      #e6edf3;
  --clr-text2:     #8b949e;
  --clr-text3:     #6e7681;
  --clr-accent:    #6366f1;
  --clr-accent-h:  #818cf8;
  --clr-accent-lt: rgba(99,102,241,0.12);
  --clr-header:    #010409;
  --clr-header-t:  #f0f6fc;
}

/* ── Site Header ───────────────────────────────────────────── */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--clr-header);
  border-bottom: 1px solid rgba(255,255,255,0.07);
  height: var(--header-h);
  box-shadow: 0 2px 12px rgba(0,0,0,0.25);
}
.header-inner {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 20px;
  height: 100%;
  display: flex;
  align-items: center;
  gap: 20px;
}
.site-logo {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-shrink: 0;
}
.logo-emoji { font-size: 1.4rem; }
.logo-name {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--clr-header-t);
  letter-spacing: -0.3px;
}
.logo-tagline {
  font-size: 0.65rem;
  color: rgba(255,255,255,0.45);
  letter-spacing: 0.5px;
  text-transform: uppercase;
  display: none;
}
@media(min-width:900px){ .logo-tagline { display: block; } }

/* Nav */
.site-nav {
  display: flex;
  align-items: center;
  gap: 2px;
  flex: 1;
  overflow-x: auto;
  scrollbar-width: none;
}
.site-nav::-webkit-scrollbar { display: none; }
.site-nav a {
  padding: 6px 12px;
  border-radius: var(--radius-sm);
  font-size: 0.82rem;
  font-weight: 500;
  color: rgba(255,255,255,0.7);
  white-space: nowrap;
  transition: background var(--trans), color var(--trans);
}
.site-nav a:hover,
.site-nav a.active {
  background: rgba(255,255,255,0.1);
  color: #fff;
}

/* Header actions */
.header-actions {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-shrink: 0;
}
.btn-theme {
  background: transparent;
  border: 1px solid rgba(255,255,255,0.2);
  border-radius: var(--radius-sm);
  color: rgba(255,255,255,0.8);
  padding: 5px 9px;
  font-size: 1rem;
  transition: background var(--trans);
}
.btn-theme:hover { background: rgba(255,255,255,0.1); }
.btn-admin {
  background: var(--clr-accent);
  color: #fff;
  padding: 6px 14px;
  border-radius: var(--radius-sm);
  font-size: 0.8rem;
  font-weight: 600;
  border: none;
  transition: background var(--trans);
  text-decoration: none;
  display: inline-block;
}
.btn-admin:hover { background: var(--clr-accent-h); }
.hamburger {
  display: none;
  background: transparent;
  border: 1px solid rgba(255,255,255,0.2);
  border-radius: var(--radius-sm);
  color: #fff;
  padding: 5px 10px;
  font-size: 1.1rem;
}
@media(max-width:768px){
  .hamburger { display: block; }
  .site-nav { display: none; }
  .site-nav.open { display: flex; flex-direction: column; position: absolute; top: var(--header-h); left: 0; right: 0; background: var(--clr-header); padding: 12px; gap: 4px; z-index: 99; }
  .site-nav.open a { width: 100%; padding: 10px 14px; }
}

/* ── Ad Slots ──────────────────────────────────────────────── */
.ad-slot {
  width: 100%;
  display: flex;
  justify-content: center;
  align-items: center;
  overflow: hidden;
  margin: 6px 0;
}
.ad-slot-inner {
  width: 100%;
  max-width: 970px;
  min-height: 80px;
  background: var(--clr-surface2);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 12px 18px;
  margin: 10px 20px;
  box-shadow: var(--shadow-sm);
  transition: var(--trans);
  position: relative;
}
.ad-slot-inner.has-code {
  background: transparent;
  border: none;
  min-height: unset;
  padding: 0;
  box-shadow: none;
}
.adsense-banner-placeholder {
  background: linear-gradient(135deg, rgba(37,99,235,0.03) 0%, rgba(245,158,11,0.03) 100%);
  border: 1px dashed rgba(37,99,235,0.35);
}
.adsense-badge {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  font-size: 10.5px;
  font-weight: 700;
  letter-spacing: 0.5px;
  text-transform: uppercase;
  color: var(--clr-accent);
  background: rgba(37,99,235,0.08);
  padding: 2px 10px;
  border-radius: 100px;
  margin-bottom: 5px;
}
.adsense-desc {
  font-size: 12.5px;
  font-weight: 600;
  color: var(--clr-text);
  margin-bottom: 2px;
}
.adsense-sub {
  font-size: 11px;
  color: var(--clr-text3);
}
[data-theme="dark"] .adsense-banner-placeholder {
  background: linear-gradient(135deg, rgba(37,99,235,0.08) 0%, rgba(245,158,11,0.05) 100%);
  border-color: rgba(37,99,235,0.4);
}

/* ── Breadcrumb ────────────────────────────────────────────── */
.breadcrumb {
  max-width: 1280px;
  margin: 0 auto;
  padding: 10px 20px;
  font-size: 0.8rem;
  color: var(--clr-text2);
  display: flex;
  align-items: center;
  gap: 6px;
}
.breadcrumb a { color: var(--clr-accent); }
.breadcrumb a:hover { text-decoration: underline; }
.breadcrumb span { color: var(--clr-text3); }

/* ── Page Body ─────────────────────────────────────────────── */
body {
  background: var(--clr-bg);
  color: var(--clr-text);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}
.page-content { flex: 1; }

/* ── Home Page Hero ────────────────────────────────────────── */
.home-hero {
  text-align: center;
  padding: 48px 20px 32px;
  background: linear-gradient(135deg, var(--clr-surface) 0%, var(--clr-bg) 100%);
  border-bottom: 1px solid var(--clr-border);
}
.home-hero h1 {
  font-size: clamp(1.6rem, 4vw, 2.4rem);
  font-weight: 800;
  letter-spacing: -0.5px;
  color: var(--clr-text);
  margin-bottom: 10px;
}
.home-hero p {
  font-size: 1rem;
  color: var(--clr-text2);
  max-width: 520px;
  margin: 0 auto;
}
.hero-badges {
  display: flex;
  justify-content: center;
  gap: 8px;
  flex-wrap: wrap;
  margin-top: 16px;
}
.hero-badge {
  background: var(--clr-accent-lt);
  color: var(--clr-accent);
  border: 1px solid rgba(79,70,229,0.2);
  border-radius: 20px;
  padding: 4px 12px;
  font-size: 0.75rem;
  font-weight: 600;
}

/* ── Tools Grid ────────────────────────────────────────────── */
.tools-section {
  max-width: 1280px;
  margin: 0 auto;
  padding: 36px 20px 48px;
}
.section-title {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--clr-text);
  margin-bottom: 20px;
  display: flex;
  align-items: center;
  gap: 8px;
}
.section-title::after {
  content: '';
  flex: 1;
  height: 1px;
  background: var(--clr-border);
}
.tools-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 20px;
}

/* Tool Card */
.tool-card {
  background: var(--clr-surface);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius-lg);
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  box-shadow: var(--shadow-sm);
  transition: transform var(--trans), box-shadow var(--trans), border-color var(--trans);
  position: relative;
  overflow: hidden;
  cursor: pointer;
  text-decoration: none;
  color: inherit;
}
.tool-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 3px;
  background: var(--card-color, var(--clr-accent));
}
.tool-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-lg);
  border-color: var(--clr-border2);
}
.tool-card-icon {
  font-size: 2.2rem;
  line-height: 1;
}
.tool-card-badge {
  position: absolute;
  top: 14px;
  right: 14px;
  background: var(--clr-accent);
  color: #fff;
  font-size: 0.65rem;
  font-weight: 700;
  padding: 2px 8px;
  border-radius: 10px;
  letter-spacing: 0.3px;
}
.tool-card h3 {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--clr-text);
}
.tool-card p {
  font-size: 0.85rem;
  color: var(--clr-text2);
  line-height: 1.5;
  flex: 1;
}
.tool-card-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--clr-accent);
  font-size: 0.85rem;
  font-weight: 600;
  margin-top: 4px;
  transition: gap var(--trans);
}
.tool-card:hover .tool-card-link { gap: 10px; }

/* ── Info Section (below tools) ────────────────────────────── */
.info-section {
  background: var(--clr-surface);
  border-top: 1px solid var(--clr-border);
  padding: 40px 20px;
}
.info-inner {
  max-width: 860px;
  margin: 0 auto;
}
.info-title {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--clr-text);
  margin-bottom: 16px;
}
.info-body {
  font-size: 0.95rem;
  color: var(--clr-text2);
  line-height: 1.75;
  white-space: pre-line;
}
.info-body p { margin-bottom: 14px; }

/* FAQ */
.faq-section {
  max-width: 860px;
  margin: 32px auto 0;
}
.faq-title {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--clr-text);
  margin-bottom: 14px;
}
.faq-item {
  border: 1px solid var(--clr-border);
  border-radius: var(--radius);
  margin-bottom: 8px;
  overflow: hidden;
}
.faq-question {
  width: 100%;
  background: none;
  border: none;
  text-align: left;
  padding: 14px 16px;
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--clr-text);
  display: flex;
  justify-content: space-between;
  align-items: center;
  cursor: pointer;
  transition: background var(--trans);
}
.faq-question:hover { background: var(--clr-surface2); }
.faq-arrow {
  font-size: 0.75rem;
  color: var(--clr-text3);
  transition: transform var(--trans);
  flex-shrink: 0;
}
.faq-item.open .faq-arrow { transform: rotate(180deg); }
.faq-answer {
  display: none;
  padding: 0 16px 14px;
  font-size: 0.875rem;
  color: var(--clr-text2);
  line-height: 1.6;
  border-top: 1px solid var(--clr-border);
  padding-top: 12px;
}
.faq-item.open .faq-answer { display: block; }

/* ── Posts Section ─────────────────────────────────────────── */
.posts-section {
  background: var(--clr-bg);
  padding: 40px 20px;
  border-top: 1px solid var(--clr-border);
}
.posts-inner {
  max-width: 900px;
  margin: 0 auto;
}
.posts-header-row {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 24px;
  gap: 16px;
  flex-wrap: wrap;
}
.posts-badge {
  display: inline-block;
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--clr-accent);
  background: var(--clr-accent-lt);
  padding: 3px 10px;
  border-radius: 20px;
  margin-bottom: 6px;
}
.posts-title {
  font-size: 1.35rem;
  font-weight: 800;
  color: var(--clr-text);
  margin-bottom: 4px;
  letter-spacing: -0.3px;
}
.posts-subtitle {
  font-size: 0.88rem;
  color: var(--clr-text2);
  line-height: 1.4;
}
.post-question-card {
  background: var(--clr-surface);
  border: 1px solid var(--clr-border2);
  border-radius: var(--radius);
  padding: 18px 20px;
  margin-bottom: 20px;
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  gap: 10px;
  animation: slideIn 0.2s ease;
}
.post-question-title {
  font-size: 1rem;
  font-weight: 700;
  color: var(--clr-accent);
}
.post-question-sub {
  font-size: 0.8rem;
  color: var(--clr-text2);
}
.post-form-row {
  display: flex;
  gap: 10px;
}
.post-form-row input, .post-form-row textarea {
  flex: 1;
}
.post-form-actions {
  display: flex;
  gap: 8px;
}
.post-card {
  background: var(--clr-surface);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius);
  padding: 20px 24px;
  margin-bottom: 16px;
  box-shadow: var(--shadow-sm);
  transition: transform var(--trans), box-shadow var(--trans);
}
.post-card:hover {
  box-shadow: var(--shadow-md);
  border-color: var(--clr-border2);
}
.post-meta-row {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 8px;
  flex-wrap: wrap;
}
.post-tag {
  font-size: 0.7rem;
  font-weight: 700;
  padding: 2px 8px;
  border-radius: 6px;
  letter-spacing: 0.2px;
}
.tag-guide { background: rgba(16,185,129,0.1); color: #059669; }
.tag-tech  { background: rgba(79,70,229,0.1); color: #4f46e5; }
.tag-fix   { background: rgba(245,158,11,0.1); color: #d97706; }
.tag-community { background: rgba(139,92,246,0.1); color: #7c3aed; }
.post-card-title {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--clr-text);
  margin-bottom: 8px;
  line-height: 1.35;
}
.post-card-date {
  font-size: 0.78rem;
  color: var(--clr-text3);
}
.post-card-body {
  font-size: 0.9rem;
  color: var(--clr-text2);
  line-height: 1.65;
  white-space: pre-line;
}
.post-card-body code {
  background: var(--clr-surface2);
  border: 1px solid var(--clr-border);
  padding: 2px 6px;
  border-radius: 4px;
  font-size: 0.85em;
  color: var(--clr-text);
}

/* ── Footer ────────────────────────────────────────────────── */
.site-footer {
  background: var(--clr-header);
  color: rgba(255,255,255,0.6);
  padding: 32px 20px 20px;
  border-top: 1px solid rgba(255,255,255,0.06);
}
.footer-inner {
  max-width: 1280px;
  margin: 0 auto;
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 32px;
  margin-bottom: 28px;
}
@media(max-width:640px){ .footer-grid { grid-template-columns: 1fr; gap: 20px; } }
.footer-brand .footer-logo {
  font-size: 1.1rem;
  font-weight: 700;
  color: #fff;
  margin-bottom: 8px;
  display: flex;
  align-items: center;
  gap: 8px;
}
.footer-about {
  font-size: 0.82rem;
  line-height: 1.6;
  max-width: 320px;
}
.footer-col-title {
  font-size: 0.75rem;
  font-weight: 700;
  color: rgba(255,255,255,0.8);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: 12px;
}
.footer-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.footer-links a {
  font-size: 0.83rem;
  color: rgba(255,255,255,0.5);
  transition: color var(--trans);
}
.footer-links a:hover { color: #fff; }
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.08);
  padding-top: 16px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
  font-size: 0.78rem;
}
.footer-privacy {
  font-size: 0.75rem;
  color: rgba(255,255,255,0.35);
  max-width: 480px;
  line-height: 1.5;
}

/* ── Tool Page Wrapper ─────────────────────────────────────── */
.tool-page-wrapper {
  background: var(--clr-bg);
  min-height: calc(100vh - var(--header-h));
}
.tool-header-bar {
  background: var(--clr-surface);
  border-bottom: 1px solid var(--clr-border);
  padding: 14px 20px;
}
.tool-header-inner {
  max-width: 1280px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  gap: 12px;
}
.tool-icon-lg { font-size: 1.8rem; }
.tool-header-text h2 {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--clr-text);
}
.tool-header-text p {
  font-size: 0.8rem;
  color: var(--clr-text2);
}

/* ── Utility ───────────────────────────────────────────────── */
.hidden { display: none !important; }
.container { max-width: 1280px; margin: 0 auto; padding: 0 20px; }

/* Toast */
.global-toast {
  position: fixed;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--clr-text);
  color: var(--clr-surface);
  padding: 10px 20px;
  border-radius: 20px;
  font-size: 0.85rem;
  font-weight: 500;
  z-index: 9999;
  box-shadow: var(--shadow-lg);
  transition: opacity 0.3s;
  pointer-events: none;
}
.global-toast.hidden { opacity: 0; }

/* Loading spinner */
.spinner {
  width: 36px;
  height: 36px;
  border: 3px solid var(--clr-border);
  border-top-color: var(--clr-accent);
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
  margin: 20px auto;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* Btn base (for pages that don't load style.css) */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 16px;
  border-radius: var(--radius-sm);
  font-size: 0.85rem;
  font-weight: 600;
  border: none;
  cursor: pointer;
  transition: background var(--trans), color var(--trans), transform 0.1s;
}
.btn:active { transform: scale(0.97); }
.btn-primary { background: var(--clr-accent); color: #fff; }
.btn-primary:hover { background: var(--clr-accent-h); }
.btn-outline { background: transparent; color: var(--clr-accent); border: 1.5px solid var(--clr-accent); }
.btn-outline:hover { background: var(--clr-accent-lt); }
.btn-ghost { background: transparent; color: var(--clr-text2); border: 1px solid var(--clr-border); }
.btn-ghost:hover { background: var(--clr-surface2); color: var(--clr-text); }
.btn-danger { background: var(--clr-error); color: #fff; }
.btn-sm { padding: 5px 12px; font-size: 0.8rem; }

/* Progress bar */
.progress-wrap {
  background: var(--clr-border);
  border-radius: 20px;
  height: 8px;
  overflow: hidden;
}
.progress-bar {
  height: 100%;
  background: linear-gradient(90deg, var(--clr-accent), #818cf8);
  border-radius: 20px;
  transition: width 0.3s ease;
}