/* DueDateTool.org - Left Sidebar Layout with Sticky Features */
:root {
  --ddt-primary: #ec4899;
  --ddt-primary-light: #fce7f3;
  --ddt-primary-dark: #be185d;
  --ddt-secondary: #f472b6;
  --ddt-accent: #fbbf24;
  --ddt-text: #374151;
  --ddt-text-light: #6b7280;
  --ddt-bg: #fff1f2;
  --ddt-white: #ffffff;
  --ddt-sidebar: #fdf2f8;
  --ddt-radius: 12px;
  --ddt-shadow: 0 2px 12px rgba(236,72,153,0.08);
  --ddt-shadow-lg: 0 8px 32px rgba(236,72,153,0.12);
}
* { margin:0; padding:0; box-sizing:border-box; }
body { font-family:Georgia, 'Times New Roman', serif; background:var(--ddt-bg); color:var(--ddt-text); line-height:1.7; }

/* Layout: Left Sidebar + Right Content */
.ddt-layout { display:flex; min-height:100vh; }
.ddt-sidebar { width:260px; background:var(--ddt-sidebar); border-right:1px solid var(--ddt-primary-light); position:fixed; height:100vh; overflow-y:auto; padding:24px 0; z-index:100; }
.ddt-sidebar-logo { display:flex; align-items:center; gap:10px; padding:0 24px 24px; font-weight:800; font-size:1.2rem; color:var(--ddt-primary); text-decoration:none; border-bottom:1px solid var(--ddt-primary-light); margin-bottom:16px; }
.ddt-sidebar-logo svg { width:28px; height:28px; }
.ddt-sidebar-section { padding:0 16px; margin-bottom:20px; }
.ddt-sidebar-title { font-size:0.75rem; text-transform:uppercase; letter-spacing:1px; color:var(--ddt-text-light); margin-bottom:8px; padding:0 8px; font-weight:600; }
.ddt-sidebar-link { display:flex; align-items:center; gap:10px; padding:10px 12px; border-radius:8px; color:var(--ddt-text); text-decoration:none; font-size:0.9rem; transition:all 0.2s; position:relative; }
.ddt-sidebar-link:hover { background:var(--ddt-primary-light); color:var(--ddt-primary-dark); }
.ddt-sidebar-link.active { background:var(--ddt-primary-light); color:var(--ddt-primary-dark); font-weight:600; }
.ddt-sidebar-link.active::before { content:''; position:absolute; left:0; top:8px; bottom:8px; width:3px; background:var(--ddt-primary); border-radius:0 3px 3px 0; }
.ddt-sidebar-link svg { width:18px; height:18px; stroke:currentColor; fill:none; stroke-width:2; flex-shrink:0; }
.ddt-sidebar-footer { padding:16px; margin-top:auto; border-top:1px solid var(--ddt-primary-light); font-size:0.8rem; color:var(--ddt-text-light); }

/* Main Content */
.ddt-main { margin-left:260px; flex:1; min-height:100vh; }
.ddt-container { max-width:900px; margin:0 auto; padding:0 32px; }

/* Hero */
.ddt-hero { background:linear-gradient(135deg, var(--ddt-primary-light) 0%, var(--ddt-white) 60%); padding:60px 0 40px; }
.ddt-hero h1 { font-size:2.6rem; font-weight:700; color:var(--ddt-primary-dark); margin-bottom:16px; line-height:1.2; font-family:Georgia, serif; }
.ddt-hero p { font-size:1.15rem; color:var(--ddt-text-light); max-width:600px; margin-bottom:28px; }
.ddt-hero-badge { display:inline-flex; align-items:center; gap:6px; background:var(--ddt-white); padding:8px 16px; border-radius:20px; font-size:0.85rem; color:var(--ddt-primary-dark); border:1px solid var(--ddt-primary-light); margin-bottom:20px; }

/* Tool List (Timeline Style) */
.ddt-tool-list { background:var(--ddt-white); border-radius:var(--ddt-radius); box-shadow:var(--ddt-shadow); overflow:hidden; border:1px solid var(--ddt-primary-light); }
.ddt-tool-item { display:flex; align-items:flex-start; gap:16px; padding:20px 24px; border-bottom:1px solid var(--ddt-primary-light); transition:all 0.2s; position:relative; text-decoration:none; color:var(--ddt-text); }
.ddt-tool-item:last-child { border-bottom:none; }
.ddt-tool-item:hover { background:var(--ddt-primary-light); }
.ddt-tool-item:hover::before { content:''; position:absolute; left:0; top:12px; bottom:12px; width:3px; background:var(--ddt-primary); border-radius:0 3px 3px 0; }
.ddt-tool-icon { width:44px; height:44px; background:var(--ddt-primary-light); border-radius:10px; display:flex; align-items:center; justify-content:center; flex-shrink:0; }
.ddt-tool-icon svg { width:22px; height:22px; stroke:var(--ddt-primary); fill:none; stroke-width:2; }
.ddt-tool-content { flex:1; }
.ddt-tool-content h3 { font-size:1.1rem; color:var(--ddt-primary-dark); margin-bottom:4px; font-weight:700; }
.ddt-tool-content p { font-size:0.9rem; color:var(--ddt-text-light); line-height:1.5; }
.ddt-tool-arrow { color:var(--ddt-primary); opacity:0; transition:opacity 0.2s; }
.ddt-tool-item:hover .ddt-tool-arrow { opacity:1; }

/* Timeline Section */
.ddt-timeline { padding:40px 0; }
.ddt-timeline-title { font-size:1.5rem; color:var(--ddt-primary-dark); margin-bottom:24px; font-weight:700; }
.ddt-timeline-item { display:flex; gap:16px; margin-bottom:20px; position:relative; padding-left:32px; }
.ddt-timeline-item::before { content:''; position:absolute; left:8px; top:8px; bottom:-28px; width:2px; background:var(--ddt-primary-light); }
.ddt-timeline-item:last-child::before { display:none; }
.ddt-timeline-dot { position:absolute; left:0; top:6px; width:18px; height:18px; background:var(--ddt-primary); border-radius:50%; border:3px solid var(--ddt-white); box-shadow:0 0 0 2px var(--ddt-primary-light); }
.ddt-timeline-content { background:var(--ddt-white); padding:16px 20px; border-radius:var(--ddt-radius); box-shadow:var(--ddt-shadow); flex:1; }
.ddt-timeline-content h4 { color:var(--ddt-primary-dark); margin-bottom:4px; font-size:1rem; }
.ddt-timeline-content p { color:var(--ddt-text-light); font-size:0.9rem; }

/* Buttons */
.ddt-btn { background:var(--ddt-primary); color:var(--ddt-white); border:none; padding:12px 24px; border-radius:var(--ddt-radius); font-size:1rem; font-weight:600; cursor:pointer; transition:all 0.2s; display:inline-flex; align-items:center; gap:8px; text-decoration:none; font-family:Georgia, serif; }
.ddt-btn:hover { background:var(--ddt-primary-dark); transform:translateY(-1px); }
.ddt-btn-secondary { background:var(--ddt-primary-light); color:var(--ddt-primary-dark); }
.ddt-btn-secondary:hover { background:#fbcfe8; }

/* Cards */
.ddt-card { background:var(--ddt-white); border-radius:var(--ddt-radius); padding:24px; box-shadow:var(--ddt-shadow); border:1px solid var(--ddt-primary-light); }

/* Forms */
.ddt-form-group { margin-bottom:20px; }
.ddt-form-group label { display:block; font-weight:600; margin-bottom:8px; color:var(--ddt-text); font-size:0.95rem; }
.ddt-form-group input, .ddt-form-group select { width:100%; padding:12px 14px; border:2px solid #e5e7eb; border-radius:var(--ddt-radius); font-size:1rem; transition:all 0.2s; font-family:Georgia, serif; }
.ddt-form-group input:focus, .ddt-form-group select:focus { outline:none; border-color:var(--ddt-primary); box-shadow:0 0 0 3px rgba(236,72,153,0.1); }
.ddt-form-row { display:grid; grid-template-columns:1fr 1fr; gap:16px; }

/* Results */
.ddt-result-card { background:linear-gradient(135deg, var(--ddt-primary-light), var(--ddt-white)); border-radius:var(--ddt-radius); padding:24px; margin-top:20px; border:1px solid var(--ddt-primary-light); }
.ddt-result-big { font-size:2rem; font-weight:800; color:var(--ddt-primary); margin-bottom:12px; }
.ddt-result-grid { display:grid; grid-template-columns:repeat(auto-fit, minmax(160px, 1fr)); gap:12px; margin-top:16px; }
.ddt-result-item { background:var(--ddt-white); padding:14px; border-radius:var(--ddt-radius); text-align:center; box-shadow:0 2px 8px rgba(0,0,0,0.04); }

/* Tabs */
.ddt-tabs { display:flex; background:var(--ddt-primary-light); overflow-x:auto; scrollbar-width:none; }
.ddt-tabs::-webkit-scrollbar { display:none; }
.ddt-tab { flex:1; min-width:140px; padding:14px 10px; text-align:center; cursor:pointer; border:none; background:transparent; font-weight:600; font-size:0.85rem; color:var(--ddt-text-light); transition:all 0.3s; display:flex; flex-direction:column; align-items:center; gap:6px; position:relative; font-family:Georgia, serif; }
.ddt-tab svg { width:20px; height:20px; stroke:currentColor; fill:none; stroke-width:2; }
.ddt-tab:hover { color:var(--ddt-primary); }
.ddt-tab.active { color:var(--ddt-primary); background:var(--ddt-white); }
.ddt-tab.active::after { content:''; position:absolute; bottom:0; left:20%; right:20%; height:3px; background:var(--ddt-primary); border-radius:3px 3px 0 0; }
.ddt-tab-content { display:none; padding:28px; }
.ddt-tab-content.active { display:block; animation:ddtFadeIn 0.3s ease; }
@keyframes ddtFadeIn { from { opacity:0; transform:translateY(8px); } to { opacity:1; transform:translateY(0); } }

/* Blog */
.ddt-blog-list { display:grid; gap:16px; }
.ddt-blog-card { display:flex; gap:16px; background:var(--ddt-white); border-radius:var(--ddt-radius); padding:16px; box-shadow:var(--ddt-shadow); border:1px solid var(--ddt-primary-light); transition:all 0.2s; text-decoration:none; color:var(--ddt-text); }
.ddt-blog-card:hover { background:var(--ddt-primary-light); }
.ddt-blog-card:hover::before { content:''; position:absolute; left:0; top:8px; bottom:8px; width:3px; background:var(--ddt-primary); border-radius:0 3px 3px 0; }
.ddt-blog-meta { display:flex; gap:12px; font-size:0.8rem; color:var(--ddt-text-light); margin-bottom:6px; }
.ddt-blog-card h3 { font-size:1.05rem; color:var(--ddt-primary-dark); margin-bottom:4px; }
.ddt-blog-card p { font-size:0.85rem; color:var(--ddt-text-light); line-height:1.5; }

/* Article */
.ddt-article-header { background:linear-gradient(135deg, var(--ddt-primary-light), var(--ddt-white)); padding:40px 0; }
.ddt-article-body { max-width:720px; margin:0 auto; padding:40px 32px; font-size:1.05rem; line-height:1.8; }
.ddt-article-body h2 { color:var(--ddt-primary-dark); margin:32px 0 16px; font-size:1.3rem; font-weight:700; }
.ddt-article-body p { margin-bottom:16px; }
.ddt-article-body ul { margin:16px 0; padding-left:24px; }
.ddt-article-body li { margin-bottom:8px; }

/* Sticky Features Bar */
.ddt-sticky-bar { position:fixed; bottom:0; left:260px; right:0; background:var(--ddt-white); border-top:1px solid var(--ddt-primary-light); padding:12px 32px; display:flex; gap:16px; align-items:center; justify-content:space-between; z-index:90; box-shadow:0 -4px 20px rgba(0,0,0,0.05); }
.ddt-sticky-bar-left { display:flex; gap:12px; align-items:center; }
.ddt-sticky-btn { background:var(--ddt-primary-light); color:var(--ddt-primary-dark); border:none; padding:8px 16px; border-radius:20px; font-size:0.85rem; font-weight:600; cursor:pointer; transition:all 0.2s; display:inline-flex; align-items:center; gap:6px; font-family:Georgia, serif; }
.ddt-sticky-btn:hover { background:var(--ddt-primary); color:var(--ddt-white); }
.ddt-sticky-btn svg { width:16px; height:16px; stroke:currentColor; fill:none; stroke-width:2; }

/* Tool Embed */
.ddt-tool-embed { background:var(--ddt-primary-light); border-radius:var(--ddt-radius); padding:20px; margin:24px 0; border:1px solid var(--ddt-secondary); }

/* Disclaimer */
.ddt-disclaimer { background:#fef3c7; border-left:4px solid #f59e0b; padding:16px 20px; border-radius:0 12px 12px 0; margin:20px 0; font-size:0.9rem; color:#92400e; }

/* Ad slots */
.ddt-ad-slot {
  width:100%;
  min-height:120px;
  max-height:150px;
  background:var(--ddt-primary-light);
  border:2px dashed var(--ddt-primary);
  border-radius:16px;
  display:none;
  align-items:center;
  justify-content:center;
  color:var(--ddt-primary-dark);
  font-size:0.85rem;
  opacity:0.6;
  margin:20px 0;
  padding:15px;
}
.ddt-ad-slot.has-content {
  display:flex;
}

/* Footer */
.ddt-footer { background:var(--ddt-primary-dark); color:var(--ddt-white); padding:24px 32px; margin-top:60px; text-align:center; font-size:0.85rem; }
.ddt-footer a { color:rgba(255,255,255,0.7); text-decoration:none; margin:0 12px; }
.ddt-footer a:hover { color:var(--ddt-white); }

/* Mobile */
@media (max-width:768px) {
  .ddt-sidebar { width:100%; position:relative; height:auto; border-right:none; border-bottom:1px solid var(--ddt-primary-light); padding:16px 0; }
  .ddt-main { margin-left:0; }
  .ddt-layout { flex-direction:column; }
  .ddt-hero h1 { font-size:2rem; }
  .ddt-form-row { grid-template-columns:1fr; }
  .ddt-sticky-bar { left:0; }
  .ddt-container { padding:0 16px; }
}

/* Utility */
.ddt-text-center { text-align:center; }
.ddt-mt-20 { margin-top:20px; }
.ddt-mb-20 { margin-bottom:20px; }
.ddt-hidden { display:none; }