* {
    scrollbar-width: thin;
    scrollbar-color: #374151 transparent;
}

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

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

*::-webkit-scrollbar-thumb {
    background-color: #374151;
    border-radius: 3px;
}

.tool-card {
    display: block;
    text-decoration: none;
    color: inherit;
    background: linear-gradient(145deg, rgba(17, 24, 39, 0.8), rgba(17, 24, 39, 0.4));
    border: 1px solid rgba(75, 85, 99, 0.3);
    border-radius: 1rem;
    padding: 1.25rem;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    overflow: hidden;
}

.tool-card::before {
    content: '';
    position: absolute;
    inset: 0;
    border-radius: 1rem;
    padding: 1px;
    background: linear-gradient(135deg, transparent, transparent);
    -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
    mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
    -webkit-mask-composite: xor;
    mask-composite: exclude;
    transition: background 0.3s;
}

.tool-card:hover {
    transform: translateY(-4px);
    border-color: rgba(139, 92, 246, 0.4);
    box-shadow: 0 8px 30px rgba(139, 92, 246, 0.15);
}

.tool-card:hover::before {
    background: linear-gradient(135deg, rgba(139, 92, 246, 0.5), rgba(236, 72, 153, 0.5));
}

.tool-card .emoji {
    font-size: 2rem;
    display: block;
    margin-bottom: 0.75rem;
    transition: transform 0.3s;
}

.tool-card:hover .emoji {
    transform: scale(1.2);
}

.tool-card .title {
    font-size: 1rem;
    font-weight: 600;
    color: #f3f4f6;
    margin-bottom: 0.375rem;
}

.tool-card .desc {
    font-size: 0.8125rem;
    color: #9ca3af;
    line-height: 1.5;
}

.chat-bubble {
    max-width: 85%;
    padding: 0.75rem 1rem;
    border-radius: 1rem;
    line-height: 1.6;
    font-size: 0.9375rem;
    animation: fadeIn 0.3s ease;
}

.chat-bubble.user {
    background: linear-gradient(135deg, #7c3aed, #ec4899);
    color: white;
    margin-left: auto;
    border-bottom-right-radius: 0.25rem;
}

.chat-bubble.ai {
    background: rgba(55, 65, 81, 0.6);
    color: #e5e7eb;
    margin-right: auto;
    border-bottom-left-radius: 0.25rem;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(8px); }
    to { opacity: 1; transform: translateY(0); }
}

@keyframes pulse-dot {
    0%, 80%, 100% { transform: scale(0.6); opacity: 0.4; }
    40% { transform: scale(1); opacity: 1; }
}

.typing-indicator span {
    display: inline-block;
    width: 8px;
    height: 8px;
    background: #9ca3af;
    border-radius: 50%;
    margin: 0 2px;
    animation: pulse-dot 1.4s infinite ease-in-out;
}

.typing-indicator span:nth-child(2) {
    animation-delay: 0.2s;
}

.typing-indicator span:nth-child(3) {
    animation-delay: 0.4s;
}

#toolModal.hidden {
    display: none;
}

#toolModal:not(.hidden) {
    display: block;
}

#modalOverlay {
    animation: fadeInBg 0.2s ease;
}

@keyframes fadeInBg {
    from { opacity: 0; }
    to { opacity: 1; }
}

#modalContent {
    animation: slideUp 0.3s ease;
}

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

[data-theme="light"] {
    --bg-primary: #f9fafb;
    --bg-surface: #ffffff;
    --bg-surface-alt: #f3f4f6;
    --border-color: rgba(209, 213, 219, 0.8);
    --text-primary: #111827;
    --text-secondary: #4b5563;
    --text-muted: #6b7280;
}

[data-theme="light"] body {
    background: var(--bg-primary) !important;
    color: var(--text-primary) !important;
}

[data-theme="light"] header {
    border-color: var(--border-color) !important;
    background: var(--bg-surface) !important;
}

[data-theme="light"] footer {
    border-color: var(--border-color) !important;
    background: var(--bg-surface) !important;
}

[data-theme="light"] #about > div {
    background: var(--bg-surface) !important;
    border-color: var(--border-color) !important;
}

[data-theme="light"] #about h2 {
    color: var(--text-primary) !important;
}

[data-theme="light"] #about p {
    color: var(--text-secondary) !important;
}

[data-theme="light"] .tool-card {
    background: linear-gradient(145deg, rgba(255, 255, 255, 0.9), rgba(243, 244, 246, 0.8)) !important;
    border-color: rgba(209, 213, 219, 0.5) !important;
}

[data-theme="light"] .tool-card:hover {
    border-color: rgba(139, 92, 246, 0.5) !important;
    box-shadow: 0 8px 30px rgba(139, 92, 246, 0.12) !important;
}

[data-theme="light"] .tool-card .title {
    color: #111827 !important;
}

[data-theme="light"] .tool-card .desc {
    color: #6b7280 !important;
}

[data-theme="light"] #modalContent {
    background: var(--bg-surface) !important;
    border-color: var(--border-color) !important;
}

[data-theme="light"] #modalContent > div:first-child {
    border-color: var(--border-color) !important;
}

[data-theme="light"] #modalTitle {
    color: var(--text-primary) !important;
}

[data-theme="light"] #modalSubtitle {
    color: var(--text-muted) !important;
}

[data-theme="light"] .chat-bubble.ai {
    background: rgba(243, 244, 246, 0.8) !important;
    color: #1f2937 !important;
}

[data-theme="light"] #chatInput {
    background: var(--bg-surface-alt) !important;
    border-color: #d1d5db !important;
    color: #111827 !important;
}

[data-theme="light"] #chatInput::placeholder {
    color: #9ca3af !important;
}

[data-theme="light"] #imageBtn {
    background: var(--bg-surface-alt) !important;
    border-color: #d1d5db !important;
    color: #6b7280 !important;
}

[data-theme="light"] .border-b,
[data-theme="light"] .border-t {
    border-color: var(--border-color) !important;
}

[data-theme="light"] #modalBody {
    background: var(--bg-primary) !important;
}

[data-theme="light"] #modalContent > div:last-child {
    background: var(--bg-surface) !important;
    border-color: var(--border-color) !important;
}

[data-theme="light"] #imagePreviewImg {
    border-color: #d1d5db !important;
}

[data-theme="light"] .chat-bubble.user {
    background: linear-gradient(135deg, #7c3aed, #ec4899) !important;
    color: white !important;
}

[data-theme="light"] nav a {
    color: var(--text-secondary) !important;
}

[data-theme="light"] nav a:hover,
[data-theme="light"] nav button:hover {
    color: #7c3aed !important;
}

[data-theme="light"] footer a {
    color: var(--text-muted) !important;
}

[data-theme="light"] footer > div {
    color: var(--text-muted) !important;
}

[data-theme="light"] #modalClose,
[data-theme="light"] #shareBtn {
    color: #9ca3af !important;
}

[data-theme="light"] #modalClose:hover {
    color: #111827 !important;
}

[data-theme="light"] #shareBtn:hover {
    color: #7c3aed !important;
}