/* MarkForge theme system — CSS variables drive light/dark mode. */
:root {
    --app-bg: #F4F6FA;
    --surface: #FFFFFF;
    --surface-2: #F8FAFC;
    --editor-bg: var(--surface-2);
    --border: #E2E8F0;
    --text: #0F172A;
    --text-2: #64748B;
    --muted: #94A3B8;
    --accent: #5B5FEF;
    --accent-hover: #4F46E5;
    --accent-soft: #EEF2FF;
    --success-bg: #DCFCE7;
    --success-text: #166534;
}

html.dark {
    --app-bg: #0F172A;
    --surface: #162033;
    --surface-2: #1B263B;
    --editor-bg: #111827;
    --border: #273449;
    --text: #E5E7EB;
    --text-2: #94A3B8;
    --muted: #64748B;
    --accent: #7C83FF;
    --accent-hover: #6366F1;
    --accent-soft: #202950;
    --success-bg: #123B2A;
    --success-text: #86EFAC;
}

html, body {
    margin: 0;
    min-height: 100%;
    background: var(--app-bg);
}

body {
    color: var(--text);
    font-family: 'DM Sans', sans-serif;
    transition: background-color .18s ease, color .18s ease;
}

/* Main application shell fills the viewport in both themes. */
main {
    min-height: 100vh;
    background: var(--app-bg);
}

header, [class*="bg-white"], [class*="bg-gray-800"] {
    background-color: var(--surface) !important;
    border-color: var(--border) !important;
    transition: background-color .18s ease, border-color .18s ease, color .18s ease;
}

.drop-zone, #drop-zone {
    background: var(--surface) !important;
    border-color: var(--border) !important;
}

input, textarea {
    background-color: var(--surface-2) !important;
    color: var(--text) !important;
    border-color: var(--border) !important;
}

#markdown-output {
    background-color: var(--editor-bg) !important;
    color: var(--text) !important;
    border-color: var(--border) !important;
    font-family: 'JetBrains Mono', monospace;
}

.bg-gray-50, .dark\:bg-gray-900 {
    background-color: var(--surface-2) !important;
    color: var(--text) !important;
    border-color: var(--border) !important;
}

button, .text-gray-900, .dark\:text-gray-100 { color: var(--text); }
.text-gray-500, .dark\:text-gray-400 { color: var(--text-2) !important; }
.text-gray-400, .dark\:text-gray-500 { color: var(--muted) !important; }

.bg-indigo-600, .bg-indigo-500 { background-color: var(--accent) !important; }
.hover\:bg-indigo-700:hover { background-color: var(--accent-hover) !important; }
.border-indigo-500 { border-color: var(--accent) !important; }
.text-indigo-600, .text-indigo-500, .dark\:text-indigo-400 { color: var(--accent) !important; }

.bg-green-50, .dark\:bg-green-900\/30 { background-color: var(--success-bg) !important; }
.text-green-700, .dark\:text-green-300, .text-green-600 { color: var(--success-text) !important; }

.drop-highlight { border-color: var(--accent) !important; background: var(--accent-soft) !important; }

.rounded-xl, .rounded-lg { border-radius: 12px !important; }

.toggle-track { transition: background-color .18s ease; }
.toggle-track.active { background: var(--accent) !important; }
.toggle-track.active .toggle-knob { transform: translateX(18px); }
.toggle-knob { transition: transform .18s ease; }

* { scrollbar-color: var(--border) transparent; scrollbar-width: thin; }

.preview-content h1 { font-size: 1.75rem; font-weight: 700; margin: 1rem 0 0.5rem; }
.preview-content h2 { font-size: 1.4rem; font-weight: 600; margin: 0.8rem 0 0.4rem; }
.preview-content h3 { font-size: 1.15rem; font-weight: 600; margin: 0.6rem 0 0.3rem; }
.preview-content p { margin: 0.4rem 0; }
.preview-content ul { list-style: disc; padding-left: 1.5rem; margin: 0.4rem 0; }
.preview-content ol { list-style: decimal; padding-left: 1.5rem; margin: 0.4rem 0; }
.preview-content blockquote { border-left: 3px solid var(--accent); padding-left: 1rem; margin: 0.5rem 0; opacity: 0.85; }
.preview-content code { background: var(--accent-soft); padding: 0.1rem 0.3rem; border-radius: 3px; font-family: 'JetBrains Mono', monospace; font-size: 0.85em; }
.preview-content pre { background: var(--surface-2); padding: 1rem; border-radius: 6px; overflow-x: auto; margin: 0.5rem 0; }
.preview-content pre code { background: none; padding: 0; }
.preview-content table { border-collapse: collapse; width: 100%; margin: 0.5rem 0; }
.preview-content th, .preview-content td { border: 1px solid var(--border); padding: 0.4rem 0.6rem; text-align: left; }
.preview-content hr { border: none; border-top: 1px solid var(--border); margin: 1rem 0; }
.preview-content a { color: var(--accent); text-decoration: underline; }
.preview-content strong { font-weight: 700; }
.preview-content em { font-style: italic; }