/* --- Custom CSS Variables for Theming --- */
:root {
    --bg-body: #f3f4f6;
    --bg-card: rgba(255, 255, 255, 0.5);
    --text-primary: #1f2937;
    --text-secondary: #4b5563;
    --border-card: rgba(255, 255, 255, 0.4);
    --toggle-bg: #d1d5db;
    --toggle-ball-bg: #ffffff;
    --accent-color: #008cff;
    --input-bg: rgba(0, 0, 0, 0.05);
    --result-bg: rgba(0, 0, 0, 0.05);
}

html.dark {
    --bg-body: #111827;
    --bg-card: rgba(31, 41, 55, 0.5);
    --text-primary: #f9fafb;
    --text-secondary: #d1d5db;
    --border-card: rgba(55, 65, 81, 0.5);
    --toggle-bg: #374151;
    --toggle-ball-bg: #111827;
    --input-bg: rgba(0, 0, 0, 0.2);
    --result-bg: rgba(0, 0, 0, 0.2);
}

/* --- Applying Variables --- */
body {
    font-family: 'Inter', sans-serif;
    background-color: var(--bg-body);
    color: var(--text-primary);
    transition: background-color 0.3s, color 0.3s;
}
.main-card {
    background-color: var(--bg-card);
    border-color: var(--border-card);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
}
.toggle-bg { background-color: var(--toggle-bg); }
.toggle-ball { background-color: var(--toggle-ball-bg); }
.accent-text { color: var(--accent-color); }
.input-field { 
    background-color: var(--input-bg);
    color: var(--text-primary);
}
.result-box { 
    background-color: var(--result-bg); 
    max-height: 200px; /* Added max-height for scrollability */
    overflow-y: auto; /* Enable vertical scroll */
}

/* Custom select arrow */
select {
    -webkit-appearance: none;
    -moz-appearance: none;
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' fill='none' viewBox='0 0 24 24' stroke-width='2' stroke='currentColor' class='w-6 h-6'%3E%3Cpath stroke-linecap='round' stroke-linejoin='round' d='M19.5 8.25l-7.5 7.5-7.5-7.5' /%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 0.75rem center;
    background-size: 1.25em;
    padding-right: 2.5rem;
}
html.dark select {
     background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' fill='none' viewBox='0 0 24 24' stroke-width='2' stroke='%23d1d5db' class='w-6 h-6'%3E%3Cpath stroke-linecap='round' stroke-linejoin='round' d='M19.5 8.25l-7.5 7.5-7.5-7.5' /%3E%3C/svg%3E");
}


/* --- Animations --- */
@keyframes fadeIn {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}
.fade-in {
    animation: fadeIn 0.5s ease-out forwards;
}
@keyframes result-in {
    from { opacity: 0; transform: scale(0.95); }
    to { opacity: 1; transform: scale(1); }
}
.result-in {
    animation: result-in 0.4s ease-out forwards;
}

/* Loading Spinner */
.loader {
    border: 4px solid var(--input-bg);
    border-top: 4px solid var(--accent-color);
    border-radius: 50%;
    width: 40px;
    height: 40px;
    animation: spin 1s linear infinite;
}
@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}