/* --- 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); 
}

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

/* --- QR Code Specific Styles --- */
#qrcode img {
    margin: auto; /* Center the QR code image */
}

/* --- Mode Slider Styles --- */
.mode-slider {
    position: relative;
    display: flex;
    background-color: var(--input-bg);
    border-radius: 0.5rem;
    padding: 0.25rem;
    width: 100%;
}
.mode-slider-button {
    flex: 1;
    padding: 0.5rem 1rem;
    border-radius: 0.5rem;
    text-align: center;
    font-weight: 500;
    cursor: pointer;
    transition: color 0.3s;
    z-index: 10;
}
.mode-slider-button.active {
    color: var(--text-primary);
}
.mode-slider-button:not(.active) {
    color: var(--text-secondary);
}
.slider-indicator {
    position: absolute;
    top: 0.25rem;
    bottom: 0.25rem;
    width: calc(50% - 0.25rem);
    background-color: var(--bg-card);
    border-radius: 0.5rem;
    box-shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px 0 rgba(0, 0, 0, 0.06);
    transition: transform 0.3s ease-in-out;
    z-index: 5;
}

/* --- Content Area for consistent height --- */
.content-area {
    min-height: 350px; /* Adjust this value as needed */
}

/* --- Custom File Upload Styles --- */
.file-drop-area {
    border: 2px dashed var(--toggle-bg);
    border-radius: 0.5rem;
    padding: 2rem;
    text-align: center;
    cursor: pointer;
    transition: background-color 0.2s, border-color 0.2s;
}
.file-drop-area.dragover {
    background-color: var(--input-bg);
    border-color: var(--accent-color);
}