/* ============================================================
   Port Checker – Professional Card UI
   ============================================================ */
:root {
    --bg: #f4f6f9;
    --card-bg: #ffffff;
    --text: #1a1a2e;
    --text-secondary: #4a4a6a;
    --border: #e2e8f0;
    --shadow: 0 8px 24px rgba(0, 0, 0, 0.06);
    --primary: #db0601;
    --primary-hover: #b80501;
    --secondary: #003a87;
    --secondary-hover: #002c66;
    --green: #10b981;
    --red: #ef4444;
    --orange: #f59e0b;
    --font: system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --radius: 16px;
    --transition: 0.2s ease;
}

[data-theme="dark"] {
    --bg: #0f1117;
    --card-bg: #1c1e26;
    --text: #e4e6f0;
    --text-secondary: #a0a4b8;
    --border: #2e3140;
    --shadow: 0 8px 24px rgba(0, 0, 0, 0.4);
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    background: var(--bg);
    font-family: var(--font);
    color: var(--text);
    transition: background 0.3s, color 0.3s;
}

/* Main wrapper */
.port-checker {
    width: 100%;
    max-width: 800px;
    margin: 30px auto;
    padding: 0 20px;
}

/* Card */
.port-checker-card {
    background: var(--card-bg);
    border-radius: var(--radius);
    padding: 24px;
    box-shadow: var(--shadow);
    border: 1px solid var(--border);
    animation: fadeUp 0.5s ease forwards;
}

/* Header row */
.port-checker-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
}

.port-checker-header h2 {
    font-size: 1.5rem;
    font-weight: 700;
    margin: 0;
}

.port-checker-theme-toggle {
    background: rgba(128, 128, 128, 0.1);
    border: 1px solid var(--border);
    border-radius: 10px;
    padding: 6px 10px;
    cursor: pointer;
    font-size: 1.2rem;
    transition: background var(--transition), transform 0.1s;
    line-height: 1;
}

.port-checker-theme-toggle:hover {
    background: rgba(128, 128, 128, 0.25);
    transform: translateY(-1px);
}

/* Form fields */
.port-checker-field-group {
    margin-bottom: 16px;
}

.port-checker-field-group label {
    display: block;
    font-weight: 600;
    margin-bottom: 6px;
    color: var(--text);
}

.port-checker-field-group input {
    width: 100%;
    padding: 12px 14px;
    border: 1px solid var(--border);
    border-radius: 12px;
    background: var(--bg);
    color: var(--text);
    font-size: 1rem;
    transition: border-color var(--transition);
}

.port-checker-field-group input:focus {
    border-color: var(--primary);
    outline: none;
}

/* Common ports */
.port-checker-common-ports {
    margin-bottom: 20px;
}

.port-checker-common-ports .port-checker-label {
    font-weight: 600;
    margin-bottom: 8px;
    display: block;
}

.port-checker-ports-buttons {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.port-checker-ports-buttons button {
    background: rgba(128, 128, 128, 0.08);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 6px 12px;
    font-size: 0.85rem;
    font-weight: 500;
    cursor: pointer;
    color: var(--text);
    transition: background var(--transition), transform 0.1s;
}

.port-checker-ports-buttons button:hover {
    background: var(--primary);
    color: white;
    border-color: var(--primary);
    transform: translateY(-1px);
}

/* Action buttons */
.port-checker-actions {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
}

.port-checker-primary-btn,
.port-checker-secondary-btn {
    flex: 1 1 auto;
    padding: 14px 20px;
    border: none;
    border-radius: 12px;
    font-weight: 700;
    font-size: 1rem;
    cursor: pointer;
    transition: background var(--transition), transform 0.1s;
    text-align: center;
}

.port-checker-primary-btn {
    background: var(--primary);
    color: white;
}

.port-checker-primary-btn:hover {
    background: var(--primary-hover);
    transform: scale(1.02);
}

.port-checker-secondary-btn {
    background: var(--secondary);
    color: white;
}

.port-checker-secondary-btn:hover {
    background: var(--secondary-hover);
    transform: scale(1.02);
}

/* Loading spinner */
.port-checker-loading {
    text-align: center;
    padding: 20px 0;
    display: none;
    flex-direction: column;
    align-items: center;
    gap: 10px;
    color: var(--text-secondary);
}

.port-checker-spinner {
    width: 40px;
    height: 40px;
    border: 4px solid rgba(0, 0, 0, 0.1);
    border-left-color: var(--primary);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

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

/* Result area */
.port-checker-result {
    margin-top: 20px;
    padding-top: 20px;
    border-top: 1px solid var(--border);
    animation: fadeUp 0.4s ease forwards;
}

.port-checker-result-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 10px;
    margin-bottom: 16px;
}

.port-checker-result-header h3 {
    font-size: 1.2rem;
    font-weight: 700;
    margin: 0;
}

.port-checker-result-actions-top {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
}

.port-checker-icon-btn {
    background: rgba(128, 128, 128, 0.1);
    border: 1px solid var(--border);
    border-radius: 10px;
    padding: 6px 10px;
    cursor: pointer;
    font-size: 0.9rem;
    transition: background var(--transition), transform 0.1s;
    line-height: 1;
    color: var(--text);
    white-space: nowrap;
}

.port-checker-icon-btn:hover {
    background: rgba(128, 128, 128, 0.25);
    transform: translateY(-1px);
}

/* Result grid */
.port-checker-result-grid {
    display: flex;
    flex-direction: column;
    gap: 0;
}

.port-checker-result-item {
    display: flex;
    justify-content: space-between;
    align-items: baseline;
    padding: 10px 0;
    border-bottom: 1px solid var(--border);
}

.port-checker-result-item:last-child {
    border-bottom: none;
}

.port-checker-result-item .port-checker-label {
    font-weight: 600;
    color: var(--text);
    flex: 0 0 40%;
    max-width: 40%;
}

.port-checker-result-item .port-checker-value {
    color: var(--text-secondary);
    font-weight: 500;
    text-align: right;
    word-break: break-word;
    flex: 1;
}

/* Status badge */
#port-checker-result-status {
    font-weight: 700;
    padding: 2px 10px;
    border-radius: 20px;
    display: inline-block;
}

.status-open {
    background: #d1fae5;
    color: #065f46;
}

.status-closed {
    background: #fee2e2;
    color: #991b1b;
}

.status-filtered {
    background: #fef3c7;
    color: #92400e;
}

[data-theme="dark"] .status-open {
    background: #064e3b;
    color: #a7f3d0;
}

[data-theme="dark"] .status-closed {
    background: #7f1d1d;
    color: #fca5a5;
}

[data-theme="dark"] .status-filtered {
    background: #78350f;
    color: #fcd34d;
}

/* Animations */
@keyframes fadeUp {
    from {
        opacity: 0;
        transform: translateY(12px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Responsive */
@media (max-width: 600px) {
    .port-checker {
        margin: 15px auto;
        padding: 0 12px;
    }

    .port-checker-card {
        padding: 18px;
    }

    .port-checker-header h2 {
        font-size: 1.3rem;
    }

    .port-checker-result-item .port-checker-label {
        flex: 0 0 50%;
        max-width: 50%;
    }
}