/* Isolated, WordPress-Friendly CSS to avoid theme conflicts */
:root {
    --primary-color: #2563eb;
    --primary-hover: #1d4ed8;
    --success-color: #16a34a;
    --success-hover: #15803d;
    --bg-color: #f8fafc;
    --card-bg: #ffffff;
    --text-color: #1e293b;
    --border-color: #e2e8f0;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    background-color: var(--bg-color);
    margin: 0;
    padding: 20px;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
}

.converter-card {
    background: var(--card-bg);
    max-width: 550px;
    width: 100%;
    padding: 28px;
    border-radius: 12px;
    box-shadow: 0 10px 25px -5px rgba(0, 0, 0, 0.08), 0 8px 10px -6px rgba(0, 0, 0, 0.01);
    border: 1px solid var(--border-color);
    box-sizing: border-box;
}

.header h2 {
    margin: 0 0 6px 0;
    color: var(--text-color);
    font-size: 1.5rem;
    font-weight: 700;
}

.header p {
    margin: 0 0 20px 0;
    color: #64748b;
    font-size: 0.875rem;
}

.tab-group {
    display: flex;
    gap: 8px;
    margin-bottom: 20px;
    background-color: #f1f5f9;
    padding: 4px;
    border-radius: 8px;
}

.tab-btn {
    flex: 1;
    padding: 10px 14px;
    border: none;
    background: transparent;
    color: #64748b;
    font-weight: 600;
    font-size: 0.875rem;
    border-radius: 6px;
    cursor: pointer;
    transition: all 0.2s ease;
}

.tab-btn.active {
    background: #ffffff;
    color: var(--primary-color);
    box-shadow: 0 1px 3px rgba(0,0,0,0.1);
}

.dropzone {
    border: 2px dashed #cbd5e1;
    border-radius: 8px;
    padding: 30px 20px;
    text-align: center;
    cursor: pointer;
    background-color: #f8fafc;
    transition: all 0.2s ease;
}

.dropzone:hover, .dropzone.dragover {
    border-color: var(--primary-color);
    background-color: #eff6ff;
}

.upload-icon {
    color: #94a3b8;
    margin-bottom: 10px;
}

.drop-text {
    margin: 0 0 4px 0;
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--text-color);
}

.file-hint {
    margin: 0;
    font-size: 0.775rem;
    color: #94a3b8;
}

.file-input {
    display: none;
}

.file-info {
    display: none;
    align-items: center;
    justify-content: space-between;
    background: #f1f5f9;
    padding: 10px 14px;
    border-radius: 6px;
    margin-top: 12px;
    font-size: 0.875rem;
    color: var(--text-color);
}

.remove-btn {
    background: none;
    border: none;
    color: #ef4444;
    font-weight: bold;
    cursor: pointer;
    font-size: 1rem;
}

.options-group {
    margin-top: 20px;
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.options-group label {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-color);
}

.options-group select {
    padding: 10px;
    border: 1px solid #cbd5e1;
    border-radius: 6px;
    font-size: 0.9rem;
    background: #ffffff;
    color: var(--text-color);
    outline: none;
}

.action-group {
    display: flex;
    gap: 10px;
    margin-top: 22px;
}

.btn {
    flex: 1;
    padding: 12px;
    border: none;
    border-radius: 6px;
    font-weight: 600;
    font-size: 0.9rem;
    cursor: pointer;
    transition: background-color 0.2s ease;
}

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.btn-primary {
    background-color: var(--primary-color);
    color: #ffffff;
}

.btn-primary:hover:not(:disabled) {
    background-color: var(--primary-hover);
}

.btn-success {
    background-color: var(--success-color);
    color: #ffffff;
}

.btn-success:hover:not(:disabled) {
    background-color: var(--success-hover);
}

.status-msg {
    margin-top: 16px;
    padding: 10px;
    border-radius: 6px;
    font-size: 0.85rem;
    display: none;
    text-align: center;
}

.status-msg.success {
    background-color: #dcfce7;
    color: #15803d;
    display: block;
}

.status-msg.error {
    background-color: #fee2e2;
    color: #b91c1c;
    display: block;
}