:root {
    --bg-color: #1e1e1e;
    --panel-bg: #2d2d2d;
    --text-color: #e0e0e0;
    --border-color: #444;
    --accent-color: #007acc;
    --hover-color: #005f9e;
    --export-color: #2e7d32;
    --export-hover: #1b5e20;
    --gdtf-color: #2e7d32;
    --gdtf-hover: #1b5e20;
    --delete-color: #d32f2f;
    --badge-bg: #3a3a3a;
    --badge-text: #64b5f6;
    --fine-badge: #e65100;
    --preview-color: #2e7d32;
    --preview-hover: #1b5e20;
    --clear-color: #555;
    --clear-hover: #777;
    --template-color: #00695c;
    --template-hover: #004d40;
    --tab-active: #007acc;
    --tab-inactive: #3a3a3a;
    --ayuda-color: #555;
    --ayuda-hover: #777;
}

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

.container {
    background-color: var(--panel-bg);
    padding: 18px;
    border-radius: 8px;
    box-shadow: 0 4px 6px rgba(0,0,0,0.3);
    width: 100%;
    max-width: 750px;
}

h1 {
    margin-top: 0;
    font-size: 1.3rem;
    text-align: center;
    color: var(--accent-color);
    margin-bottom: 0;
    text-transform: uppercase;
    letter-spacing: 1px;
    display: inline-block;
}

h1 .subtitle {
    text-transform: lowercase;
    font-size: 0.85rem;
    color: #aaa;
    letter-spacing: 1px;
}

.header-container {
    position: relative;
    text-align: center;
    margin-bottom: 4px;
}

.header-logo {
    height: 50px;
    position: absolute;
    right: 10px;
    top: 50%;
    margin-top: 8px;
    transform: translateY(-50%);
}

.version {
    display: inline-block;
    text-align: center;
    font-size: 0.68rem;
    color: #888;
    margin-bottom: 16px;
    letter-spacing: 2px;
    cursor: pointer;
    width: auto;
}

.version:hover {
    color: var(--accent-color);
}

h2 {
    font-size: 1rem;
    padding-bottom: 0;
    margin-top: 0;
    margin-bottom: 14px;
}

.section-box h2 {
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 7px;
}

.section-box {
    background-color: var(--bg-color);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    padding: 13px;
    margin-bottom: 12px;
}

.form-grid {
    display: grid;
    grid-template-columns: 115px 1fr 100px 1fr;
    gap: 10px;
    align-items: center;
    margin-bottom: 0;
}

label {
    font-size: 0.82rem;
    text-align: right;
    padding-right: 5px;
    white-space: nowrap;
}

input[type="text"],
input[type="number"] {
    width: 100%;
    padding: 7px;
    background-color: var(--bg-color);
    border: 1px solid var(--border-color);
    color: var(--text-color);
    border-radius: 4px;
    box-sizing: border-box;
    font-size: 0.85rem;
}

#beamSize {
    text-align: center;
}

input[type="number"]::-webkit-inner-spin-button,
input[type="number"]::-webkit-outer-spin-button {
    -webkit-appearance: none;
    margin: 0;
}
input[type="number"] {
    -moz-appearance: textfield;
    appearance: textfield;
}

select {
    width: 100%;
    padding: 8px;
    background-color: var(--bg-color);
    border: 1px solid var(--border-color);
    color: var(--text-color);
    border-radius: 4px;
    box-sizing: border-box;
}

input:focus, select:focus {
    outline: none;
    border-color: var(--accent-color);
}

.tabs {
    display: flex;
    gap: 3px;
    margin-bottom: 0;
    border-top: none;
    padding-top: 0;
    align-items: center;
    overflow-x: auto;
    flex-wrap: nowrap;
}

.tab {
    padding: 7px 13px;
    background-color: var(--tab-inactive);
    border: 1px solid var(--border-color);
    border-bottom: none;
    border-radius: 6px 6px 0 0;
    cursor: pointer;
    font-size: 0.82rem;
    font-weight: bold;
    color: #aaa;
    transition: background-color 0.2s;
    white-space: nowrap;
    flex-shrink: 0;
}

.tab.active {
    background-color: var(--tab-active);
    color: white;
    border-color: var(--accent-color);
}

.tab:hover:not(.active) {
    background-color: #444;
}

.tab-add {
    padding: 7px 11px;
    background-color: var(--export-color);
    border: 1px solid var(--border-color);
    border-radius: 6px 6px 0 0;
    cursor: pointer;
    font-size: 0.82rem;
    font-weight: bold;
    color: white;
    margin-left: 5px;
    flex-shrink: 0;
}

.tab-delete {
    padding: 3px 6px;
    background: none;
    border: none;
    color: #999;
    cursor: pointer;
    font-size: 0.75rem;
    margin-left: 2px;
}

.tab-delete:hover {
    color: var(--delete-color);
}

.tab-content {
    background-color: var(--bg-color);
    border: 1px solid var(--border-color);
    border-radius: 0 6px 6px 6px;
    padding: 13px;
    margin-bottom: 12px;
}

.channel-controls {
    display: flex;
    gap: 9px;
    margin-bottom: 13px;
    align-items: center;
}

.channel-controls select {
    width: 35%;
    max-width: 200px;
    padding: 8px;
    font-size: 0.9rem;
}

.checkbox-container {
    display: flex;
    align-items: center;
    gap: 5px;
    white-space: nowrap;
    font-size: 0.82rem;
    cursor: pointer;
}

.checkbox-container input[type="checkbox"] {
    width: 16px;
    height: 16px;
    cursor: pointer;
    accent-color: var(--accent-color);
}

.counter {
    font-size: 0.9rem;
    color: #aaa;
    white-space: nowrap;
    margin-left: auto;
}

.counter span {
    color: var(--accent-color);
    font-weight: bold;
}

button {
    color: white;
    border: none;
    padding: 7px 13px;
    cursor: pointer;
    border-radius: 4px;
    font-weight: bold;
    transition: background-color 0.2s;
    white-space: nowrap;
    font-size: 0.82rem;
}

.btn-add {
    background-color: var(--accent-color);
}
.btn-add:hover {
    background-color: var(--hover-color);
}

.btn-clear {
    background-color: var(--clear-color);
}
.btn-clear:hover {
    background-color: var(--clear-hover);
}

.btn-template {
    background-color: var(--template-color);
}
.btn-template:hover {
    background-color: var(--template-hover);
}

.btn-delete {
    background-color: var(--delete-color);
    padding: 4px 8px;
    font-size: 0.75rem;
}
.btn-delete:hover {
    background-color: #b71c1c;
}

.export-buttons {
    display: flex;
    gap: 6px;
    margin-top: 16px;
    border-top: 1px solid var(--border-color);
    padding-top: 16px;
    align-items: center;
}

.export-spacer {
    flex: 1;
}

.btn-ayuda {
    background-color: var(--ayuda-color);
    padding: 8px 12px;
    font-size: 0.85rem;
    flex: 0.4;
    text-align: center;
}
.btn-ayuda:hover {
    background-color: var(--ayuda-hover);
}

.btn-preview {
    background-color: var(--preview-color);
    padding: 8px 12px;
    font-size: 0.85rem;
    flex: 0.7;
    text-align: center;
}
.btn-preview:hover {
    background-color: var(--preview-hover);
}

.btn-gdtf {
    background-color: var(--gdtf-color);
    padding: 8px 12px;
    font-size: 0.85rem;
    flex: 0.7;
    text-align: center;
}
.btn-gdtf:hover {
    background-color: var(--gdtf-hover);
}

ul {
    list-style-type: none;
    padding: 0;
    margin: 0;
    max-height: 220px;
    overflow-y: auto;
}

li {
    background-color: var(--panel-bg);
    border: 1px solid var(--border-color);
    margin-bottom: 5px;
    padding: 7px 11px;
    border-radius: 4px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    cursor: grab;
    user-select: none;
}

li:active {
    cursor: grabbing;
}

li.dragging {
    opacity: 0.5;
    background-color: #333;
}

.ch-info {
    display: flex;
    align-items: center;
    gap: 12px;
}

.ch-num {
    background-color: #444;
    padding: 2px 7px;
    border-radius: 3px;
    font-family: monospace;
    font-size: 0.85rem;
    min-width: 18px;
    text-align: center;
}

.ch-name {
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: 9px;
    font-size: 0.85rem;
}

.badge {
    background-color: var(--badge-bg);
    color: var(--badge-text);
    font-size: 0.72rem;
    padding: 1px 5px;
    border-radius: 3px;
    font-weight: normal;
    border: 1px solid #444;
}

.badge-fine {
    background-color: #3a2a1a;
    color: #ff9800;
    font-size: 0.67rem;
    padding: 1px 4px;
    border-radius: 3px;
    font-weight: normal;
    border: 1px solid #5a3a1a;
}

.modal {
    display: none;
    position: fixed;
    z-index: 1000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0,0,0,0.8);
}

.modal-content {
    background-color: var(--panel-bg);
    margin: 5% auto;
    padding: 20px;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    width: 90%;
    max-width: 700px;
    max-height: 80%;
    display: flex;
    flex-direction: column;
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 15px;
}

.modal-header h3 {
    margin: 0;
    color: var(--accent-color);
}

.modal-close {
    color: #aaa;
    font-size: 1.5rem;
    cursor: pointer;
    background: none;
    border: none;
    padding: 0;
    font-weight: bold;
}
.modal-close:hover {
    color: white;
}

.modal-body {
    flex: 1;
    overflow: auto;
}

.modal-body pre {
    background-color: var(--bg-color);
    padding: 15px;
    border-radius: 4px;
    font-size: 0.75rem;
    white-space: pre-wrap;
    word-wrap: break-word;
    max-height: 60vh;
    overflow-y: auto;
    color: #a5d6a7;
}

@media (max-width: 650px) {
    .header-logo {
        display: none;
    }
    .form-grid {
        grid-template-columns: 105px 1fr;
    }
    label {
        text-align: left;
    }
    .channel-controls {
        flex-wrap: wrap;
    }
    .channel-controls select {
        width: 100%;
        max-width: none;
    }
}