/* ===== Markdown Editor - Modern Styles ===== */
.md-layout { display: grid; grid-template-columns: 1fr 320px; gap: 28px; align-items: start; }
.md-main { min-width: 0; }
.md-card { background: var(--bg-card); border: 1px solid var(--border-light); border-radius: 18px; padding: 0; overflow: hidden; box-shadow: 0 4px 16px rgba(0,0,0,0.04); }
.md-sidebar { display: flex; flex-direction: column; gap: 20px; }

/* Toolbar */
.md-toolbar { display: flex; align-items: center; gap: 4px; padding: 10px 16px; border-bottom: 1px solid var(--border-light); background: var(--bg-soft); flex-wrap: wrap; }
.md-toolbar-group { display: flex; gap: 2px; }
.md-toolbar-sep { width: 1px; height: 24px; background: var(--border-light); margin: 0 6px; flex-shrink: 0; }
.md-tool-btn { width: 32px; height: 32px; display: flex; align-items: center; justify-content: center; background: transparent; border: 1px solid transparent; border-radius: 6px; color: var(--text-secondary); cursor: pointer; font-size: 14px; transition: all 0.15s; }
.md-tool-btn:hover { background: var(--bg-card); color: var(--text); border-color: var(--border-light); }
body[data-theme="dark"] .md-toolbar { background: var(--bg-muted); border-color: var(--border); }
body[data-theme="dark"] .md-tool-btn:hover { background: var(--bg-card); }

/* Editor container */
.md-editor-container { display: grid; grid-template-columns: 1fr 1fr; min-height: 500px; }
.md-pane { display: flex; flex-direction: column; border-right: 1px solid var(--border-light); }
.md-pane:last-child { border-right: none; }
.md-pane-header { display: flex; align-items: center; gap: 8px; padding: 10px 16px; background: var(--bg-soft); border-bottom: 1px solid var(--border-light); font-size: 13px; font-weight: 600; color: var(--text-secondary); }
.md-pane-header i { color: var(--primary); font-size: 13px; }
.md-pane-badge { margin-left: auto; background: var(--bg-card); border: 1px solid var(--border-light); border-radius: 6px; padding: 1px 8px; font-size: 11px; color: var(--text-muted); font-weight: 500; }
body[data-theme="dark"] .md-pane-header { background: var(--bg-muted); border-color: var(--border); }
body[data-theme="dark"] .md-pane-badge { background: var(--bg-muted); border-color: var(--border); }

.md-input { flex: 1; width: 100%; min-height: 460px; padding: 20px; border: none; resize: vertical; font-family: 'SF Mono', 'Monaco', 'Inconsolata', 'Consolas', monospace; font-size: 14px; line-height: 1.7; color: var(--text); background: var(--bg); outline: none; tab-size: 4; }
.md-input::placeholder { color: var(--text-muted); }
body[data-theme="dark"] .md-input { background: #0f172a; }
.md-pane-preview { background: var(--bg); }
body[data-theme="dark"] .md-pane-preview { background: #0f172a; }

/* Preview styling */
.md-preview { flex: 1; padding: 20px; overflow-y: auto; line-height: 1.7; font-size: 15px; color: var(--text); min-height: 460px; }
.md-preview h1 { font-size: 1.8em; font-weight: 800; margin: 0 0 16px; padding-bottom: 8px; border-bottom: 2px solid var(--border-light); }
.md-preview h2 { font-size: 1.4em; font-weight: 700; margin: 24px 0 12px; padding-bottom: 6px; border-bottom: 1px solid var(--border-light); }
.md-preview h3 { font-size: 1.2em; font-weight: 700; margin: 20px 0 10px; }
.md-preview h4, .md-preview h5, .md-preview h6 { font-size: 1.1em; font-weight: 700; margin: 16px 0 8px; }
.md-preview p { margin: 0 0 12px; }
.md-preview strong { font-weight: 700; }
.md-preview em { font-style: italic; }
.md-preview a { color: var(--primary); text-decoration: none; }
.md-preview a:hover { text-decoration: underline; }
.md-preview ul, .md-preview ol { margin: 8px 0; padding-left: 24px; }
.md-preview li { margin: 4px 0; }
.md-preview blockquote { margin: 12px 0; padding: 10px 16px; background: var(--bg-soft); border-left: 4px solid var(--primary); border-radius: 0 8px 8px 0; color: var(--text-secondary); }
.md-preview pre { margin: 12px 0; padding: 16px; background: #1e293b; border-radius: 10px; overflow-x: auto; position: relative; }
.md-preview code { font-family: 'SF Mono', 'Monaco', 'Inconsolata', monospace; font-size: 13px; }
.md-preview :not(pre) > code { background: var(--bg-soft); padding: 2px 6px; border-radius: 4px; font-size: 13px; color: var(--primary); }
body[data-theme="dark"] .md-preview :not(pre) > code { background: rgba(99,102,241,0.12); }
.md-preview pre code { color: #e2e8f0; line-height: 1.6; }
.md-preview img { max-width: 100%; border-radius: 8px; margin: 12px 0; }
.md-preview table { width: 100%; border-collapse: collapse; margin: 12px 0; }
.md-preview th, .md-preview td { padding: 10px 14px; border: 1px solid var(--border-light); text-align: left; }
.md-preview th { background: var(--bg-soft); font-weight: 700; }
.md-preview hr { margin: 24px 0; height: 1px; background: var(--border-light); border: none; }
.md-preview input[type="checkbox"] { margin-right: 6px; }
.md-preview ol li::marker { font-weight: 600; color: var(--primary); }

/* SEO */
.calc-seo { margin-top: 24px; padding: 20px 24px; background: var(--bg-card); border: 1px solid var(--border-light); border-radius: 16px; box-shadow: 0 2px 8px rgba(0,0,0,0.04); }
.calc-seo p { font-size: 0.88rem; color: var(--text-secondary); line-height: 1.7; margin: 0; }

/* Sidebar */
.sidebar-section { background: var(--bg-card); border: 1px solid var(--border-light); border-radius: 16px; padding: 20px; box-shadow: 0 2px 8px rgba(0,0,0,0.04); }
.sidebar-header { text-align: center; padding: 28px 20px!important; background: linear-gradient(135deg,#667eea 0%,#764ba2 100%)!important; border-color: transparent!important; }
.sidebar-header h1 { font-size: 1.35rem; font-weight: 800; color: #fff; margin-bottom: 6px; text-shadow: 0 2px 8px rgba(0,0,0,0.2); }
.sidebar-header p { font-size: 0.82rem; color: rgba(255,255,255,0.85); }
.sidebar-title { font-size: 1rem; font-weight: 700; color: var(--text); margin-bottom: 16px; display: flex; align-items: center; gap: 8px; }
.sidebar-title i { color: var(--primary); font-size: 0.9rem; }
.sidebar-tools { display: flex; flex-direction: column; gap: 8px; }
.sidebar-tool { display: flex; align-items: center; gap: 12px; padding: 10px 12px; border-radius: 10px; transition: all 0.2s; text-decoration: none; background: var(--bg-soft); }
.sidebar-tool:hover { background: var(--primary-50); transform: translateX(3px); }
.sidebar-tool-icon { width: 36px; height: 36px; display: flex; align-items: center; justify-content: center; border-radius: 10px; font-size: 16px; flex-shrink: 0; background: linear-gradient(135deg,#6366f1,#8b5cf6); color: #fff; }
.sidebar-tool-info { flex: 1; min-width: 0; }
.sidebar-tool-name { font-size: 0.9rem; font-weight: 700; color: var(--text); margin-bottom: 2px; }
.sidebar-tool-desc { font-size: 0.78rem; color: var(--text-muted); }
.ad-placeholder { width: 300px; height: 250px; flex-shrink: 0; margin: 0 auto; background: var(--bg-card); border: 2px dashed var(--border); border-radius: 16px; display: flex; flex-direction: column; align-items: center; justify-content: center; text-align: center; padding: 20px; color: var(--text-muted); font-size: 0.82rem; line-height: 1.5; }
.ad-placeholder .ad-icon { font-size: 1.8rem; color: var(--text-muted); margin-bottom: 10px; opacity: 0.4; }
.ad-placeholder .ad-label { font-weight: 600; font-size: 0.85rem; color: var(--text-muted); margin-bottom: 4px; }
.ad-placeholder .ad-size { font-size: 0.75rem; color: var(--text-muted); opacity: 0.6; }

body[data-theme="dark"] .sidebar-section { background: var(--bg-card); border-color: var(--border); }
body[data-theme="dark"] .sidebar-tool { background: var(--bg-muted); }
body[data-theme="dark"] .sidebar-tool:hover { background: var(--primary-50); }
body[data-theme="dark"] .ad-placeholder { background: var(--bg-card); border-color: var(--border); }
body[data-theme="dark"] .md-card { background: var(--bg-card); border-color: var(--border); }

.calc-bottom { padding: 12px 0 56px; }
.calc-bottom-grid { display: grid; grid-template-columns: minmax(0, 1fr) 320px; gap: 18px; margin-bottom: 18px; }
.calc-panel { background: var(--bg-card); border: 1px solid var(--border-light); border-radius: 16px; box-shadow: 0 8px 30px rgba(15, 23, 42, 0.06); padding: 20px; }
.calc-panel-title { display: flex; align-items: center; gap: 8px; margin: 0 0 12px; font-size: 18px; font-weight: 800; color: var(--text); }
.calc-panel-title i { color: var(--primary); }
.calc-panel-lead { margin: 0 0 16px; color: var(--text-muted); line-height: 1.7; }

.calc-feature-grid { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 12px; margin-bottom: 16px; }
.calc-feature-card { border-radius: 14px; padding: 14px; background: linear-gradient(180deg, rgba(99, 102, 241, 0.08), rgba(99, 102, 241, 0.03)); border: 1px solid rgba(99, 102, 241, 0.12); }
.calc-feature-card.accent-green { background: linear-gradient(180deg, rgba(16, 185, 129, 0.12), rgba(16, 185, 129, 0.03)); border-color: rgba(16, 185, 129, 0.14); }
.calc-feature-card.accent-blue { background: linear-gradient(180deg, rgba(59, 130, 246, 0.12), rgba(59, 130, 246, 0.03)); border-color: rgba(59, 130, 246, 0.14); }
.calc-feature-card.accent-orange { background: linear-gradient(180deg, rgba(245, 158, 11, 0.12), rgba(245, 158, 11, 0.03)); border-color: rgba(245, 158, 11, 0.14); }
.calc-feature-card.accent-violet { background: linear-gradient(180deg, rgba(168, 85, 247, 0.12), rgba(168, 85, 247, 0.03)); border-color: rgba(168, 85, 247, 0.14); }

.calc-feature-icon { width: 34px; height: 34px; border-radius: 10px; display: flex; align-items: center; justify-content: center; margin-bottom: 10px; color: #fff; background: linear-gradient(135deg, var(--primary), #8b5cf6); }
.accent-green .calc-feature-icon { background: linear-gradient(135deg, #10b981, #059669); }
.accent-blue .calc-feature-icon { background: linear-gradient(135deg, #3b82f6, #2563eb); }
.accent-orange .calc-feature-icon { background: linear-gradient(135deg, #f59e0b, #d97706); }
.accent-violet .calc-feature-icon { background: linear-gradient(135deg, #a855f7, #7c3aed); }

.calc-feature-name { font-size: 14px; font-weight: 800; color: var(--text); margin-bottom: 4px; }
.calc-feature-desc { font-size: 12.5px; line-height: 1.6; color: var(--text-muted); }

.calc-feature-list { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 10px 18px; color: var(--text-muted); font-size: 13px; line-height: 1.7; }
.calc-feature-list i { color: #10b981; margin-right: 6px; }

.shortcut-table { width: 100%; border-collapse: collapse; font-size: 13px; }
.shortcut-table thead th { text-align: left; padding: 10px 0; color: var(--text-muted); font-weight: 700; border-bottom: 1px solid var(--border-light); }
.shortcut-table tbody td { padding: 10px 0; border-bottom: 1px solid var(--border-light); color: var(--text); }
.shortcut-table tbody td:first-child { font-family: 'SF Mono', Monaco, Consolas, monospace; color: var(--primary); font-weight: 700; }

.calc-steps-panel { grid-column: 1/-1; }
.calc-steps { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 12px; }
.calc-step { display: flex; align-items: flex-start; gap: 12px; padding: 14px; border-radius: 14px; background: linear-gradient(180deg, rgba(99, 102, 241, 0.08), rgba(99, 102, 241, 0.03)); }
.calc-step-num { width: 28px; height: 28px; border-radius: 999px; flex-shrink: 0; display: flex; align-items: center; justify-content: center; background: linear-gradient(135deg, var(--primary), #8b5cf6); color: #fff; font-weight: 800; font-size: 13px; }
.calc-step-title { font-weight: 800; color: var(--text); margin-bottom: 4px; }
.calc-step-desc { color: var(--text-muted); font-size: 13px; line-height: 1.6; }

.calc-use-grid { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 12px; }
.calc-use-card { border-radius: 14px; padding: 16px; border: 1px solid var(--border-light); background: linear-gradient(180deg, rgba(99, 102, 241, 0.06), rgba(255, 255, 255, 0.04)); }
.calc-use-card.warm { background: linear-gradient(180deg, rgba(245, 158, 11, 0.12), rgba(245, 158, 11, 0.03)); }
.calc-use-card.cool { background: linear-gradient(180deg, rgba(168, 85, 247, 0.12), rgba(168, 85, 247, 0.03)); }
.calc-use-card.green { background: linear-gradient(180deg, rgba(16, 185, 129, 0.12), rgba(16, 185, 129, 0.03)); }
.calc-use-card.amber { background: linear-gradient(180deg, rgba(59, 130, 246, 0.12), rgba(59, 130, 246, 0.03)); }

.calc-use-icon { width: 34px; height: 34px; border-radius: 10px; display: flex; align-items: center; justify-content: center; color: #fff; margin-bottom: 10px; background: linear-gradient(135deg, var(--primary), #8b5cf6); }
.warm .calc-use-icon { background: linear-gradient(135deg, #f59e0b, #d97706); }
.cool .calc-use-icon { background: linear-gradient(135deg, #a855f7, #7c3aed); }
.green .calc-use-icon { background: linear-gradient(135deg, #10b981, #059669); }
.amber .calc-use-icon { background: linear-gradient(135deg, #3b82f6, #2563eb); }

.calc-use-title { font-size: 14px; font-weight: 800; color: var(--text); margin-bottom: 4px; }
.calc-use-desc { font-size: 12.5px; line-height: 1.6; color: var(--text-muted); }

.calc-knowledge-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 12px; }
.calc-knowledge-card { border-radius: 14px; padding: 16px; background: linear-gradient(180deg, rgba(99, 102, 241, 0.08), rgba(255, 255, 255, 0.04)); border: 1px solid rgba(99, 102, 241, 0.08); }
.calc-knowledge-title { font-weight: 800; color: var(--text); margin-bottom: 8px; }
.calc-knowledge-card p { margin: 0; color: var(--text-muted); line-height: 1.7; font-size: 13px; }

.calc-cta { margin-top: 14px; border-radius: 16px; padding: 18px 20px; display: flex; align-items: center; justify-content: space-between; gap: 16px; background: linear-gradient(135deg, rgba(99, 102, 241, 0.10), rgba(168, 85, 247, 0.10)); border: 1px solid rgba(99, 102, 241, 0.16); }
.calc-cta-title { font-size: 15px; font-weight: 800; color: var(--text); margin-bottom: 4px; }
.calc-cta-title i { color: #8b5cf6; margin-right: 8px; }
.calc-cta-text { color: var(--text-muted); line-height: 1.6; font-size: 13px; }

body[data-theme="dark"] .calc-panel { background: var(--bg-card); border-color: var(--border); }
body[data-theme="dark"] .calc-cta, body[data-theme="dark"] .calc-feature-card, body[data-theme="dark"] .calc-use-card, body[data-theme="dark"] .calc-knowledge-card { border-color: var(--border); }

@media (max-width:1024px) { .md-layout { grid-template-columns:1fr 280px; gap:20px; } }
@media (max-width:860px) { .calc-bottom-grid { grid-template-columns: 1fr; } .calc-feature-grid, .calc-steps, .calc-use-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); } .calc-knowledge-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
@media (max-width:640px) { .calc-feature-grid, .calc-steps, .calc-use-grid, .calc-knowledge-grid { grid-template-columns: 1fr; } }
@media (max-width:860px) { .md-layout { grid-template-columns:1fr; } .md-sidebar { display:grid; grid-template-columns:1fr 1fr; gap:16px; } .md-editor-container { grid-template-columns:1fr; } }
@media (max-width:640px) { .md-sidebar { grid-template-columns:1fr; } }