:root {
    --bg-cream: #fdfbf7;
    --sidebar-bg: #f7f5f0;
    --panel-bg: #ffffff;
    --surface: #f8fafc;
    --accent-green: #4a7c59;
    --accent-green-light: #e8f5e9;
    --text-dark: #1f2937;
    --text-muted: #6b7280;
    --card-bg: #ffffff;
    --border-color: #e5e7eb;
    --canvas-start: #eef2f3;
    --canvas-end: #d9e2e7;
    --glass-bg: rgba(255, 255, 255, 0.8);
    --glass-border: rgba(255, 255, 255, 0.5);
}

:root.dark {
    --bg-cream: #0b1220;
    --sidebar-bg: #0f172a;
    --panel-bg: #111827;
    --surface: #111827;
    --accent-green: #4ade80;
    --accent-green-light: rgba(74, 222, 128, 0.16);
    --text-dark: #f8fafc;
    --text-muted: #94a3b8;
    --card-bg: #111827;
    --border-color: #334155;
    --canvas-start: #111827;
    --canvas-end: #0b1220;
    --glass-bg: rgba(15, 23, 42, 0.75);
    --glass-border: rgba(148, 163, 184, 0.18);
}

html, body {
    height: 100%;
}

body {
    font-family: 'Inter', sans-serif;
    background-color: var(--bg-cream);
    color: var(--text-dark);
    overflow: hidden;
}

h1, h2, h3, .serif {
    font-family: 'Playfair Display', serif;
}

.no-scrollbar::-webkit-scrollbar {
    display: none;
}

.no-scrollbar {
    -ms-overflow-style: none;
    scrollbar-width: none;
}

::-webkit-scrollbar {
    width: 6px;
}

::-webkit-scrollbar-track {
    background: transparent;
}

::-webkit-scrollbar-thumb {
    background: #d1d5db;
    border-radius: 10px;
}

::-webkit-scrollbar-thumb:hover {
    background: #9ca3af;
}

.glass-panel {
    background: var(--glass-bg);
    backdrop-filter: blur(12px);
    border: 1px solid var(--glass-border);
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.05), 0 2px 4px -1px rgba(0, 0, 0, 0.03);
}

.theme-toggle-btn {
    width: 2.5rem;
    height: 2.5rem;
    border-radius: 9999px;
    border: 1px solid var(--border-color);
    background: var(--surface);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 12px 30px rgba(15, 23, 42, 0.08);
}

.theme-toggle-btn:hover {
    transform: translateY(-1px);
    background: var(--glass-bg);
}

html.dark body {
    background-color: var(--bg-cream);
    color: var(--text-dark);
}

html.dark header,
html.dark aside,
html.dark main,
html.dark #featurePanel,
html.dark .bg-white,
html.dark .bg-gray-50,
html.dark .bg-gray-100,
html.dark .bg-yellow-100 {
    background-color: var(--panel-bg) !important;
}

html.dark .top-nav-item {
    color: #cbd5e1 !important;
}

html.dark .top-nav-item.active {
    color: var(--accent-green) !important;
}

html.dark .text-gray-800 { color: #f8fafc !important; }
html.dark .text-gray-600 { color: #cbd5e1 !important; }
html.dark .text-gray-500 { color: #94a3b8 !important; }
html.dark .text-gray-400 { color: #64748b !important; }
html.dark .border-gray-200 { border-color: #334155 !important; }
html.dark .border-gray-100 { border-color: #1f2937 !important; }
html.dark .border-gray-50 { border-color: #1f2937 !important; }
html.dark .bg-green-50 { background-color: rgba(16, 185, 129, 0.15) !important; }
html.dark .bg-yellow-100 { background-color: #18202c !important; }
html.dark .shadow-sm { box-shadow: 0 1px 2px rgba(0,0,0,0.16) !important; }
html.dark #canvas-container {
    background: radial-gradient(circle at center, var(--canvas-start) 0%, var(--canvas-end) 100%);
    box-shadow: inset 0 0 30px rgba(0, 0, 0, 0.4);
}

html.dark .glass-panel {
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.35);
}

.nav-item {
    transition: all 0.2s ease;
}

.nav-item:hover, .nav-item.active {
    background-color: var(--accent-green-light);
    border-left: 4px solid var(--accent-green);
    color: var(--accent-green);
}

.nav-item.active {
    font-weight: 600;
}

.top-nav-item {
    transition: all 0.2s ease;
    color: var(--text-dark);
}

.top-nav-item.active {
    color: var(--accent-green);
    font-weight: 600;
}

#canvas-container {
    background: radial-gradient(circle at center, #eef2f3 0%, #d9e2e7 100%);
    box-shadow: inset 0 0 20px rgba(0,0,0,0.05);
}

.fade-in {
    animation: fadeIn 0.5s ease-in-out;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

.molecule-card {
    transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1), box-shadow 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.molecule-card:hover {
    transform: translateY(-4px) scale(1.02);
    box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
}

.nav-item {
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.nav-item:hover, .nav-item.active {
    background-color: var(--accent-green-light);
    border-left: 4px solid var(--accent-green);
    color: var(--accent-green);
    transform: translateX(2px);
}

.nav-item.active {
    font-weight: 600;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
}

.top-nav-item {
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.top-nav-item.active {
    color: var(--accent-green);
    font-weight: 600;
    transform: scale(1.05);
}

#canvas-container {
    background: radial-gradient(circle at center, var(--canvas-start) 0%, var(--canvas-end) 100%);
    box-shadow: inset 0 0 20px rgba(0,0,0,0.05);
    transition: background 0.5s ease;
}

.glass-panel {
    background: var(--glass-bg);
    backdrop-filter: blur(12px);
    border: 1px solid var(--glass-border);
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.05), 0 2px 4px -1px rgba(0, 0, 0, 0.03);
    transition: all 0.3s ease;
}

.glass-panel:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
}

.theme-toggle-btn {
    width: 2.5rem;
    height: 2.5rem;
    border-radius: 9999px;
    border: 1px solid var(--border-color);
    background: var(--surface);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 12px 30px rgba(15, 23, 42, 0.08);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.theme-toggle-btn:hover {
    transform: translateY(-2px) scale(1.1);
    background: var(--glass-bg);
    box-shadow: 0 20px 40px rgba(15, 23, 42, 0.15);
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

.animate-spin {
    animation: spin 1s linear infinite;
}

.animate-fade-in {
    animation: fadeInUp 0.5s ease-out;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.note-card {
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
}

.note-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.1);
}

.note-card .group:hover .opacity-0 {
    opacity: 1 !important;
}

html.dark .note-card {
    background-color: var(--panel-bg);
    border-color: var(--border-color);
}

html.dark .note-card p {
    color: var(--text-dark);
}

html.dark .note-card .text-gray-400 {
    color: var(--text-muted);
}

html.dark .note-card .bg-gray-100 {
    background-color: var(--surface);
}

html.dark #noteInput {
    color: var(--text-dark) !important;
    background-color: var(--panel-bg) !important;
}

html.dark #noteInput::placeholder {
    color: var(--text-muted) !important;
}

html.dark #noteSearch {
    color: var(--text-dark) !important;
    background-color: var(--panel-bg) !important;
    border-color: var(--border-color) !important;
}

html.dark #noteSearch::placeholder {
    color: var(--text-muted) !important;
}

html.dark #noteCategory {
    color: var(--text-dark) !important;
    background-color: var(--panel-bg) !important;
    border-color: var(--border-color) !important;
}