/* === Base Reset & Variables === */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
    --bg: #0f0f23;
    --surface: #1a1a2e;
    --surface-alt: #16162b;
    --border: #333;
    --border-light: #444;
    --text: #ccc;
    --text-muted: #888;
    --primary: #2563eb;
    --primary-hover: #3b7bf7;
    --success: #1c7644;
    --success-light: limegreen;
    --danger: #dc2626;
    --warning: #d97706;
    --disabled-bg: #1c1c34;
    --disabled-text: #555;
    --accent: #0ea5e9;
    --radius: 6px;
    --shadow: 0 1px 3px rgba(0,0,0,0.3);
    --input-bg: #0a0a1a;
    --input-border: #444;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    font-size: 13px;
    background: var(--bg);
    color: var(--text);
    line-height: 1.4;
}

#app {
    max-width: 1400px;
    margin: 0 auto;
    padding: 8px;
}

/* === Header === */
.header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 8px 16px;
    background: #1a1a2e;
    color: white;
    border-radius: var(--radius);
    margin-bottom: 8px;
    border: 1px solid var(--border);
}
.header h1 { font-size: 20px; font-weight: 700; }
.header .version { font-size: 11px; opacity: 0.8; margin-left: 8px; }
.connection-badge {
    padding: 4px 12px;
    border-radius: 12px;
    font-weight: 600;
    font-size: 12px;
    background: var(--danger);
}
.connection-badge.online { background: var(--success); }

/* === Top Bar === */
.top-bar {
    display: grid;
    grid-template-columns: 200px 1fr 1fr;
    gap: 8px;
    margin-bottom: 8px;
}

fieldset.group {
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 0;
    margin: 0;
    background: var(--surface);
    min-width: 0;
    overflow: hidden;
}
fieldset.group legend {
    display: none;
}
fieldset.group::before {
    content: attr(data-label);
    display: block;
    font-weight: 600;
    font-size: 11px;
    color: var(--accent);
    padding: 6px 12px 4px;
    border-bottom: 1px solid var(--border);
}
fieldset.group > *:not(legend) {
    margin: 0;
    padding-left: 12px;
    padding-right: 12px;
}
fieldset.group > *:not(legend):first-of-type {
    padding-top: 8px;
}
fieldset.group > *:not(legend):last-child {
    padding-bottom: 8px;
}

/* Port Settings */
.port-settings .form-row { margin-bottom: 6px; }
.port-settings label { font-size: 12px; display: block; margin-bottom: 2px; }
.port-name { font-size: 11px; color: var(--text-muted); display: block; margin: 4px 0; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }

/* Device Info */
.info-grid {
    display: grid;
    grid-template-columns: auto 1fr;
    gap: 3px 8px;
    align-items: center;
}
.info-grid label { font-size: 11px; color: var(--text-muted); white-space: nowrap; }
.info-grid input { font-size: 11px; padding: 2px 4px; border: 1px solid var(--input-border); border-radius: 3px; background: var(--input-bg); color: var(--text); }

/* Settings */
.settings-grid {
    display: grid;
    grid-template-columns: auto 1fr;
    gap: 4px 8px;
    align-items: center;
}
.settings-grid label { font-size: 12px; white-space: nowrap; }
.settings-grid select, .settings-grid input[type="text"] {
    font-size: 12px;
    padding: 3px 6px;
    border: 1px solid var(--input-border);
    border-radius: 3px;
    background: var(--input-bg);
    color: var(--text);
}
.checkbox-row { grid-column: 1 / -1; display: flex; align-items: center; gap: 4px; }
.checkbox-row input { margin: 0; }
.checkbox-row label { font-size: 12px; }

/* === Buttons === */
.btn {
    padding: 6px 14px;
    border: none;
    border-radius: var(--radius);
    font-size: 12px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.15s;
    color: #fff;
}
.btn:disabled { opacity: 0.4; cursor: not-allowed; }
.btn-sm { padding: 4px 10px; font-size: 11px; color: #000; background: #aaa; }
.btn-sm:hover { background: #ccc; }
.btn-primary { background: var(--primary); }
.btn-primary:hover:not(:disabled) { background: var(--primary-hover); }
.btn-success { background: var(--success); }
.btn-success:hover:not(:disabled) { background: #25a35a; }
.btn-danger { background: var(--danger); }
.btn-danger:hover:not(:disabled) { filter: brightness(1.2); }
.btn-warning { background: var(--warning); }
.btn-warning:hover:not(:disabled) { filter: brightness(1.2); }
.btn-row { display: flex; gap: 6px; grid-column: 1 / -1; align-items: center; }
.password-label {
    font-size: 12px;
    margin-left: auto;
    white-space: nowrap;
}
.password-input {
    flex: 0 1 140px;
    min-width: 0;
    font-size: 12px;
    padding: 3px 6px;
    border: 1px solid var(--input-border);
    border-radius: 3px;
    background: var(--input-bg);
    color: var(--text);
}

/* === Action Bar === */
.action-bar {
    display: flex;
    gap: 8px;
    margin-bottom: 8px;
    padding: 8px;
    background: var(--surface);
    border-radius: var(--radius);
    border: 1px solid var(--border);
}

/* === Tabs === */
.tab-nav {
    display: flex;
    gap: 2px;
    background: var(--border);
    border-radius: var(--radius) var(--radius) 0 0;
    padding: 2px 2px 0;
}
.tab-btn {
    flex: 1;
    padding: 8px 16px;
    border: none;
    background: #2a2a4a;
    font-size: 13px;
    font-weight: 600;
    cursor: pointer;
    border-radius: var(--radius) var(--radius) 0 0;
    color: #aaa;
    transition: all 0.15s;
}
.tab-btn.active { background: #3a3a5a; color: #fff; }
.tab-btn:hover:not(.active) { background: #333358; color: #ccc; }

.tab-content {
    background: var(--surface);
    border: 1px solid var(--border);
    border-top: none;
    border-radius: 0 0 var(--radius) var(--radius);
    padding: 12px;
    min-height: 500px;
}
.tab-pane { display: none; }
.tab-pane.active { display: block; }

/* === Port Panels === */
.port-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
    margin-bottom: 12px;
}

.port-panel {
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 10px;
    background: var(--surface-alt);
}
.port-panel.disabled-panel { opacity: 0.5; }

.port-header {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 8px;
    padding-bottom: 6px;
    border-bottom: 2px solid var(--primary);
}
.port-header input[type="checkbox"] { width: 16px; height: 16px; }
.port-header .port-title { font-weight: 700; font-size: 14px; color: var(--accent); }

/* Port Body Sections */
.port-body section {
    margin-bottom: 8px;
    padding: 6px 8px;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 4px;
}
.port-body section h4 {
    font-size: 11px;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 4px;
}

/* ID Format Section */
.id-format-row {
    display: flex;
    align-items: center;
    gap: 8px;
    flex-wrap: wrap;
}
.id-format-row label { font-size: 12px; white-space: nowrap; }
.id-format-row input[type="text"] {
    width: 80px;
    font-size: 12px;
    padding: 3px 6px;
    border: 1px solid var(--input-border);
    border-radius: 3px;
    font-family: 'Courier New', monospace;
    text-transform: uppercase;
    background: var(--input-bg);
    color: var(--text);
}
.id-format-row .dlc-input { width: 30px; text-align: center; }
.radio-group { display: flex; gap: 8px; align-items: center; }
.radio-group label { font-size: 12px; display: flex; align-items: center; gap: 2px; }

/* Label Row */
.label-row {
    display: flex;
    align-items: center;
    gap: 8px;
}
.label-row label { font-size: 12px; }
.label-row input { flex: 1; font-size: 12px; padding: 3px 6px; border: 1px solid var(--input-border); border-radius: 3px; background: var(--input-bg); color: var(--text); }

/* Selected Bytes */
.selbytes-row {
    display: flex;
    align-items: center;
    gap: 4px;
}
.selbytes-row > span { font-size: 11px; color: var(--text-muted); margin-right: 4px; }
.byte-check { display: flex; flex-direction: column; align-items: center; gap: 1px; }
.byte-check span { font-size: 10px; color: var(--text-muted); }
.byte-check input[type="checkbox"] { width: 14px; height: 14px; }
.selbyte-btn {
    width: 30px;
    height: 22px;
    border: 1px solid var(--border-light);
    border-radius: 3px;
    background: var(--input-bg);
    font-size: 11px;
    font-weight: bold;
    color: var(--text-muted);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    user-select: none;
    transition: background 0.1s, color 0.1s;
    padding: 0;
}
.selbyte-btn.active {
    background: var(--primary);
    color: #fff;
    border-color: var(--primary);
}
.selbyte-btn:disabled {
    background: var(--disabled-bg);
    color: var(--disabled-text);
    cursor: default;
    border-color: var(--border);
}

/* Data Sections */
.data-section { padding: 6px 8px !important; }
.data-header {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 4px;
}
.data-header h4 { margin: 0; }
.data-type-radios { display: flex; gap: 6px; }
.data-type-radios label { font-size: 11px; display: flex; align-items: center; gap: 2px; }

.data-bytes-row {
    display: flex;
    align-items: center;
    gap: 2px;
    margin-top: 3px;
}
.data-bytes-row > span {
    font-size: 10px;
    color: var(--text-muted);
    min-width: 28px;
}
.data-byte-input {
    width: 28px;
    height: 24px;
    text-align: center;
    font-family: 'Courier New', monospace;
    font-size: 11px;
    border: 1px solid var(--input-border);
    border-radius: 3px;
    text-transform: uppercase;
    padding: 0 2px;
    background: var(--input-bg);
    color: var(--text);
}
.data-byte-input:disabled { background: var(--disabled-bg); color: var(--disabled-text); }

/* Mask Bit Editor */
.mask-editor { display: none; padding: 4px 0; }
.mask-byte-row {
    display: flex;
    align-items: center;
    gap: 3px;
    margin-bottom: 2px;
}
.mask-byte-row .mask-label {
    font-size: 10px;
    color: var(--text-muted);
    min-width: 22px;
    text-align: right;
}
.mask-bit {
    width: 22px;
    height: 22px;
    border: 1px solid var(--border-light);
    border-radius: 3px;
    background: var(--input-bg);
    font-size: 11px;
    font-weight: bold;
    color: var(--text-muted);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    user-select: none;
    transition: background 0.1s, color 0.1s;
}
.mask-bit.active {
    background: var(--primary);
    color: #fff;
    border-color: var(--primary);
}
.mask-bit:disabled {
    background: var(--disabled-bg);
    color: var(--disabled-text);
    cursor: default;
    border-color: var(--border);
}
.mask-bit-header {
    display: flex;
    gap: 3px;
    margin-bottom: 2px;
    padding-left: 25px;
}
.mask-bit-header span {
    width: 22px;
    text-align: center;
    font-size: 9px;
    color: var(--text-muted);
}

/* Timeout & Delay */
.timeout-section, .delay-section {
    display: flex;
    align-items: center;
    gap: 8px;
    flex-wrap: wrap;
}
.timeout-section label, .delay-section label { font-size: 12px; white-space: nowrap; }
.timeout-section input[type="text"], .delay-section input[type="text"] {
    width: 60px;
    font-size: 12px;
    padding: 3px 6px;
    border: 1px solid var(--input-border);
    border-radius: 3px;
    text-align: center;
    background: var(--input-bg);
    color: var(--text);
}
.timeout-section .unit, .delay-section .unit { font-size: 11px; color: var(--text-muted); }

/* DIG Type Section */
.dig-type-section {
    display: flex;
    align-items: center;
    gap: 8px;
    flex-wrap: wrap;
}
.dig-type-section label { font-size: 12px; }

/* Sleep Panel */
.sleep-panel {
    max-width: 50%;
}
.sleep-grid {
    display: grid;
    grid-template-columns: auto 1fr;
    gap: 6px 12px;
    align-items: center;
}
.sleep-grid label { font-size: 12px; }
.sleep-grid select, .sleep-grid input[type="text"] {
    font-size: 12px;
    padding: 3px 6px;
    border: 1px solid var(--input-border);
    border-radius: 3px;
    background: var(--input-bg);
    color: var(--text);
}

/* === Status Bar === */
.status-bar {
    display: flex;
    gap: 16px;
    padding: 6px 12px;
    background: var(--surface);
    color: var(--text-muted);
    border-radius: var(--radius);
    font-size: 11px;
    margin-top: 8px;
    border: 1px solid var(--border);
}
.status-bar-link {
    color: #fff;
    text-decoration: none;
    font-weight: 600;
    margin-left: auto;
}
.status-bar-link:hover { text-decoration: underline; }
.status-bar-link::before { display: none; }
.status-bar .copyright {
    color: #fff;
    font-weight: 600;
    margin-right: auto;
    padding-left: 4px;
}
.status-bar .copyright::before { display: none; }
.status-bar span::before {
    content: '';
    display: inline-block;
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: #475569;
    margin-right: 6px;
    vertical-align: middle;
}
.status-bar-download {
    margin-left: auto;
    padding: 2px 10px;
    font-size: 11px;
    line-height: 1.4;
}

/* === Toast === */
.toast {
    position: fixed;
    bottom: 24px;
    right: 24px;
    padding: 12px 20px;
    border-radius: var(--radius);
    font-size: 13px;
    font-weight: 600;
    color: white;
    z-index: 1000;
    transition: opacity 0.3s, transform 0.3s;
    box-shadow: 0 4px 12px rgba(0,0,0,0.4);
}
.toast.hidden { opacity: 0; transform: translateY(20px); pointer-events: none; }

/* === Modal === */
.modal {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.6);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1100;
}
.modal.hidden { display: none; }
.modal-content {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 16px 20px;
    min-width: 320px;
    max-width: 420px;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.6);
}
.modal-content h3 {
    margin-bottom: 8px;
    color: var(--accent);
    font-size: 14px;
}
.modal-content p {
    font-size: 12px;
    color: var(--text-muted);
    margin-bottom: 10px;
}
.modal-content input {
    width: 100%;
    font-size: 13px;
    padding: 6px 8px;
    border: 1px solid var(--input-border);
    border-radius: 3px;
    background: var(--input-bg);
    color: var(--text);
    margin-bottom: 12px;
}
.modal-actions {
    display: flex;
    justify-content: flex-end;
    gap: 6px;
}
.toast.success { background: var(--success); }
.toast.error { background: var(--danger); }
.toast.warning { background: var(--warning); }
.toast.info { background: var(--primary); }

/* === Responsive === */
@media (max-width: 1100px) {
    .top-bar { grid-template-columns: 1fr 1fr; }
    .port-row { grid-template-columns: 1fr; }
    .sleep-panel { max-width: 100%; }
}
@media (max-width: 700px) {
    .top-bar { grid-template-columns: 1fr; }
}