:root {
    --bg-color: #0f172a;
    --card-bg: #1e293b;
    --text-main: #f1f5f9;
    --text-muted: #94a3b8;
    --accent: #3b82f6;
    --accent-hover: #2563eb;
    --border: #334155;
    --input-bg: #0f172a;
    --success: #10b981;
    --success-hover: #059669;
    --error: #ef4444;
}

body {
    font-family: 'Inter', sans-serif;
    background-color: var(--bg-color);
    color: var(--text-main);
    margin: 0;
    padding: 40px 20px;
    line-height: 1.6;
    min-height: 100vh;
    box-sizing: border-box;
    display: flex;
    flex-direction: column;
    align-items: center;
}

h1 {
    color: #fff;
    margin: 0 0 40px 0;
    font-weight: 700;
    font-size: 2.5rem;
    text-align: center;
    letter-spacing: -0.025em;
    text-shadow: 0 4px 12px rgba(0,0,0,0.3);
}

.card {
    background: var(--card-bg);
    padding: 32px;
    border-radius: 16px;
    box-shadow: 0 10px 30px -10px rgba(0,0,0,0.5);
    width: 100%;
    max-width: 800px;
    border: 1px solid var(--border);
    margin-bottom: 24px;
    transition: transform 0.2s ease;
}

label {
    display: block;
    margin-bottom: 10px;
    font-weight: 500;
    color: var(--text-main);
    font-size: 0.95rem;
}

input[type="text"], textarea {
    width: 100%;
    padding: 12px 16px;
    background-color: var(--input-bg);
    border: 1px solid var(--border);
    border-radius: 8px;
    color: #fff;
    font-family: 'Inter', sans-serif;
    font-size: 1rem;
    transition: all 0.2s ease;
    box-sizing: border-box;
    margin-bottom: 16px;
}

textarea {
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.9rem;
    min-height: 120px;
    line-height: 1.4;
}

input[type="text"]:focus, textarea:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.2);
}

/* Mode Selector Styling */
.mode-selector {
    display: flex;
    flex-direction: column;
    gap: 10px;
    background: transparent;
    border: none;
    padding: 0;
    margin-bottom: 24px;
}

.mode-selector label {
    display: flex;
    align-items: center;
    background: var(--input-bg);
    padding: 12px 16px;
    border-radius: 8px;
    border: 1px solid var(--border);
    margin: 0;
    text-align: left;
    cursor: pointer;
    transition: all 0.2s;
}

.mode-selector label:hover {
    border-color: var(--accent);
    background: rgba(59, 130, 246, 0.05);
}

.mode-selector input[type="radio"] {
    display: inline-block;
    margin-right: 12px;
    accent-color: var(--accent);
    width: 18px;
    height: 18px;
}

button {
    background-color: var(--accent);
    color: white;
    border: none;
    padding: 14px 28px;
    border-radius: 8px;
    cursor: pointer;
    font-size: 1rem;
    font-weight: 600;
    width: 100%;
    transition: all 0.2s;
    box-shadow: 0 4px 6px -1px rgba(59, 130, 246, 0.3);
}

button:hover {
    background-color: var(--accent-hover);
    transform: translateY(-1px);
    box-shadow: 0 6px 8px -1px rgba(59, 130, 246, 0.4);
}

button:active {
    transform: translateY(0);
}

button:disabled {
    background-color: var(--border);
    color: var(--text-muted);
    cursor: not-allowed;
    box-shadow: none;
    transform: none;
}

.output-section {
    animation: slideUp 0.4s ease-out;
}

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

.output-group {
    margin-bottom: 24px;
    position: relative;
}

.output-group label {
    color: var(--accent);
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 8px;
}

.copy-btn {
    background-color: var(--input-bg);
    color: var(--text-muted);
    border: 1px solid var(--border);
    font-size: 0.85rem;
    padding: 8px 16px;
    width: auto;
    position: absolute;
    top: 0;
    right: 0;
    margin: 0;
    box-shadow: none;
}

.copy-btn:hover {
    background-color: var(--card-bg);
    color: var(--accent);
    border-color: var(--accent);
    transform: none;
    box-shadow: none;
}

#status {
    margin-top: 16px;
    text-align: center;
    font-weight: 500;
    min-height: 24px;
}

.error {
    color: var(--error);
    background: rgba(239, 68, 68, 0.1);
    padding: 10px;
    border-radius: 6px;
    display: inline-block;
    width: 100%;
    box-sizing: border-box;
}

#url-hint {
    color: var(--text-muted) !important;
    margin-top: -10px;
    margin-bottom: 16px;
    font-size: 0.85rem;
}