:root {
    --primary-color: #007aff;
    --primary-hover: #0062cc;
    --danger-color: #ff3b30;
    --danger-hover: #d63329;
    --background-color: #f2f2f7;
    --card-background: #ffffff;
    --text-primary: #1c1c1e;
    --text-secondary: #8e8e93;
    --border-radius: 16px;
    --shadow: 0 4px 12px rgba(0, 0, 0, 0.05);
    --input-bg: #f2f2f7;
    --font-family: -apple-system, BlinkMacSystemFont, "SF Pro Text", "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

body {
    font-family: var(--font-family);
    background-color: var(--background-color);
    color: var(--text-primary);
    margin: 0;
    padding: 40px 20px;
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
}

.container {
    max-width: 900px;
    margin: 0 auto;
}

/* Header */
header {
    text-align: center;
    margin-bottom: 40px;
}

h1 {
    font-size: 32px;
    font-weight: 700;
    margin: 0 0 10px 0;
    letter-spacing: -0.5px;
}

.subtitle {
    color: var(--text-secondary);
    font-size: 17px;
    margin: 0;
}

/* Cards */
.card {
    background: var(--card-background);
    border-radius: var(--border-radius);
    padding: 24px;
    box-shadow: var(--shadow);
    margin-bottom: 24px;
    transition: transform 0.2s ease;
}

.card h2 {
    font-size: 20px;
    font-weight: 600;
    margin: 0 0 20px 0;
    display: flex;
    align-items: center;
    gap: 10px;
}

/* Forms */
.form-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr auto;
    gap: 12px;
    align-items: end;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.form-group label {
    font-size: 13px;
    font-weight: 500;
    color: var(--text-secondary);
    margin-left: 4px;
}

input {
    background: var(--input-bg);
    border: none;
    padding: 12px 16px;
    border-radius: 12px;
    font-size: 15px;
    color: var(--text-primary);
    outline: none;
    transition: box-shadow 0.2s;
}

input:focus {
    box-shadow: 0 0 0 2px var(--primary-color);
    background: #fff;
}

/* Buttons */
button {
    background-color: var(--primary-color);
    color: white;
    border: none;
    padding: 12px 24px;
    border-radius: 12px;
    font-size: 15px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    height: 42px;
    white-space: nowrap;
}

button:hover {
    background-color: var(--primary-hover);
    transform: translateY(-1px);
}

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

button:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none;
}

button.secondary {
    background-color: var(--input-bg);
    color: var(--primary-color);
}

button.secondary:hover {
    background-color: #e5e5ea;
}

button.delete {
    background-color: rgba(255, 59, 48, 0.1);
    color: var(--danger-color);
    padding: 8px 16px;
    height: 36px;
    font-size: 13px;
}

button.delete:hover {
    background-color: rgba(255, 59, 48, 0.2);
    color: var(--danger-hover);
}

/* Panel List */
.panel-list {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.panel-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 16px;
    background: var(--input-bg);
    border-radius: 12px;
    transition: background 0.2s;
}

.panel-item:hover {
    background: #e5e5ea;
}

.panel-info {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.panel-name {
    font-weight: 600;
    font-size: 15px;
}

.panel-url {
    font-size: 13px;
    color: var(--text-secondary);
}

.empty-state {
    text-align: center;
    padding: 30px;
    color: var(--text-secondary);
    font-style: italic;
}

/* Status & Results */
.status-area {
    margin-top: 20px;
}

.result-card {
    background: #eafbf0;
    border: 1px solid #ccebd6;
    display: none;
}

.result-card.visible {
    display: block;
    animation: fadeIn 0.3s ease;
}

textarea {
    width: 100%;
    height: 100px;
    padding: 12px;
    border-radius: 8px;
    border: 1px solid #d1d1d6;
    font-family: "SF Mono", "Menlo", monospace;
    font-size: 13px;
    resize: vertical;
    margin-top: 8px;
    background: #fff;
    box-sizing: border-box;
}

.error-msg {
    color: var(--danger-color);
    padding: 12px;
    background: rgba(255, 59, 48, 0.1);
    border-radius: 8px;
    margin-top: 10px;
    display: none;
    font-size: 14px;
}

.loading-spinner {
    display: inline-block;
    width: 16px;
    height: 16px;
    border: 2px solid rgba(255,255,255,0.3);
    border-radius: 50%;
    border-top-color: #fff;
    animation: spin 1s ease-in-out infinite;
    margin-right: 8px;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

/* Responsive */
@media (max-width: 768px) {
    .form-grid {
        grid-template-columns: 1fr;
    }
    
    .panel-item {
        flex-direction: column;
        align-items: flex-start;
        gap: 12px;
    }
    
    .panel-item button {
        width: 100%;
    }
}