* {
    box-sizing: border-box;
}

body {
    margin: 0;
    font-family: "Inter", system-ui, -apple-system, sans-serif;
    background: linear-gradient(180deg, #f8fafc 0%, #eef2ff 100%);
    color: #0f172a;
}

.topbar {
    height: 74px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 1.25rem;
    border-bottom: 1px solid #e2e8f0;
    background: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(8px);
    position: sticky;
    top: 0;
    z-index: 20;
}

.brand-link {
    font-weight: 700;
    letter-spacing: 0.04em;
    color: #0f172a;
    text-decoration: none;
}

.topbar-actions {
    display: flex;
    align-items: center;
    gap: 0.65rem;
}

.editor-layout {
    display: grid;
    grid-template-columns: minmax(300px, 390px) minmax(0, 1fr);
    gap: 1rem;
    padding: 1rem;
    min-height: calc(100vh - 74px);
}

.panel {
    background: #ffffff;
    border: 1px solid #e2e8f0;
    border-radius: 14px;
}

.panel-left {
    padding: 1rem;
    display: flex;
    flex-direction: column;
    gap: 0.8rem;
}

.panel-title {
    font-size: 1.2rem;
    margin: 0;
}

.panel-subtitle {
    margin: 0;
    color: #475569;
    font-size: 0.92rem;
}

.editor-asset-preload {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
    pointer-events: none;
}

.panel-subtitle .inline-code {
    font-family: ui-monospace, Consolas, monospace;
    font-size: 0.72rem;
    background: #f1f5f9;
    color: #0f172a;
    padding: 0.08rem 0.35rem;
    border-radius: 4px;
    border: 1px solid #e2e8f0;
    word-break: break-all;
}

.section-title {
    margin: 0.75rem 0 0;
    font-size: 0.95rem;
}

.field-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0.6rem;
}

.field-group {
    display: flex;
    flex-direction: column;
    gap: 0.35rem;
}

.field-group label {
    font-size: 0.8rem;
    font-weight: 600;
    color: #334155;
}

.field-group input[type="file"],
.field-group input[type="range"],
.field-group input[type="color"],
.field-group input[type="text"],
.field-group select {
    width: 100%;
}

.field-group input[type="file"] {
    border: 1px solid #cbd5e1;
    border-radius: 8px;
    padding: 0.4rem;
    font-size: 0.8rem;
    background: #f8fafc;
}

.field-group input[type="range"] {
    accent-color: #1e3a8a;
}

.field-group input[type="color"] {
    border: 1px solid #cbd5e1;
    border-radius: 8px;
    height: 36px;
    background: #fff;
    padding: 0.2rem;
}

.field-group input[type="text"],
.field-group select {
    border: 1px solid #cbd5e1;
    border-radius: 8px;
    height: 36px;
    background: #fff;
    padding: 0 0.55rem;
    font-size: 0.85rem;
}

.button-row {
    margin-top: 0.5rem;
    display: flex;
    gap: 0.55rem;
    flex-wrap: wrap;
}

.btn {
    border: 0;
    border-radius: 9px;
    font-size: 0.8rem;
    font-weight: 600;
    letter-spacing: 0.02em;
    padding: 0.62rem 0.95rem;
    text-decoration: none;
    cursor: pointer;
}

.btn-primary {
    background: #0f172a;
    color: #fff;
}

.btn-primary:hover {
    background: #1e293b;
}

.btn-secondary {
    background: #e2e8f0;
    color: #0f172a;
}

.btn-secondary:hover {
    background: #cbd5e1;
}

.btn-whatsapp {
    background: #25d366;
    color: #fff;
}

.btn-whatsapp:hover {
    background: #128c7e;
}

.status-message {
    margin: 0.2rem 0 0;
    font-size: 0.78rem;
    color: #475569;
}

.panel-canvas {
    padding: 1rem;
    display: grid;
    place-items: center;
}

.canvas-wrap {
    width: min(100%, 860px);
    min-width: 260px;
    border-radius: 14px;
    border: 1px solid #cbd5e1;
    background: #f8fafc;
    overflow: hidden;
    /* Evita lienzo con altura 0 cuando el canvas escala solo en ancho */
    min-height: 200px;
}

#tshirtCanvas {
    width: 100%;
    height: auto;
    min-height: 280px;
    aspect-ratio: 840 / 900;
    display: block;
    touch-action: none;
    vertical-align: middle;
}

@media (max-width: 980px) {
    .editor-layout {
        grid-template-columns: 1fr;
    }
}