/* Custom Scrollbar - Zen & Minimalist */
::-webkit-scrollbar {
    width: 4px;
    height: 4px;
}
::-webkit-scrollbar-track {
    background: transparent;
}
::-webkit-scrollbar-thumb {
    background: #27272a;
    border-radius: 10px;
}
::-webkit-scrollbar-thumb:hover {
    background: #3f3f46;
}

/* Base Overrides */
html {
    color-scheme: dark;
}

body {
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Navigation Link States */
.nav-link {
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    color: #64748b;
}

.dark .nav-link {
    color: #a1a1aa;
}

.nav-link:hover {
    color: #0f172a;
    background-color: #f1f5f9;
}

.dark .nav-link:hover {
    color: #ffffff;
    background-color: #18181b;
}

.nav-link.active {
    color: #0f172a;
    background-color: #f1f5f9;
    box-shadow: 0 4px 12px -2px rgba(0, 0, 0, 0.05);
}

.dark .nav-link.active {
    color: #ffffff;
    background-color: #18181b;
    box-shadow: 0 4px 12px -2px rgba(0, 0, 0, 0.5);
}

.nav-link.active i {
    color: #6366f1;
}

/* Output Area Customization */
.custom-scrollbar::-webkit-scrollbar {
    width: 5px;
}

.custom-scrollbar::-webkit-scrollbar-thumb {
    background: rgba(0, 0, 0, 0.05);
}

.dark .custom-scrollbar::-webkit-scrollbar-thumb {
    background: rgba(255, 255, 255, 0.05);
}

.custom-scrollbar::-webkit-scrollbar-thumb:hover {
    background: rgba(0, 0, 0, 0.1);
}

.dark .custom-scrollbar::-webkit-scrollbar-thumb:hover {
    background: rgba(255, 255, 255, 0.1);
}

/* Animations */
@keyframes slideUp {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

.animate-slide-up {
    animation: slideUp 0.4s cubic-bezier(0.4, 0, 0.2, 1) forwards;
}

/* Spinner - Professional & Discrete */
.custom-spinner {
    width: 24px;
    height: 24px;
    border: 2px solid rgba(99, 102, 241, 0.1);
    border-top: 2px solid #6366f1;
    border-radius: 50%;
    animation: spin 0.8s cubic-bezier(0.5, 0, 0.5, 1) infinite;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* Output Cards - Dark Zen Style */
.output-card {
    background: #121214;
    border: 1px solid #1e1e20;
    border-radius: 1.5rem;
    overflow: hidden;
    margin-bottom: 1.5rem;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.output-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 12px 24px -8px rgba(0, 0, 0, 0.5);
    border-color: #27272a;
}

/* Typography Refinements */
h1, h2, h3, h4 {
    letter-spacing: -0.02em;
}

textarea::placeholder {
    color: #3f3f46;
}

/* Select Styling Reset */
select {
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' fill='none' viewBox='0 0 24 24' stroke='%2352525b' stroke-width='2'%3E%3Cpath stroke-linecap='round' stroke-linejoin='round' d='M19 9l-7 7-7-7'%3E%3C/path%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 1rem center;
    background-size: 1rem;
}

/* Seamless Textarea Output */
textarea.output-body {
    background: transparent !important;
    border: none !important;
    outline: none !important;
    box-shadow: none !important;
    width: 100%;
    resize: none;
    padding: 0;
}

textarea.output-body:focus {
    box-shadow: none !important;
    outline: none !important;
}