* { box-sizing: border-box; margin: 0; padding: 0; font-family: 'Segoe UI', Roboto, Helvetica, Arial, sans-serif; }
body { background-color: #f4f4f9; color: #333; line-height: 1.6; padding-bottom: 40px; }

header { background: #2c3e50; color: #fff; padding: 1.5rem 1rem 0; text-align: center; box-shadow: 0 2px 5px rgba(0,0,0,0.1); }
header h1 { font-weight: 300; }
header p { color: #bdc3c7; margin-top: 4px; }

.tabs { display: flex; flex-wrap: wrap; justify-content: center; gap: 6px; margin-top: 18px; }
.tab { background: transparent; color: #bdc3c7; border: none; border-bottom: 3px solid transparent; padding: 10px 14px; font-size: 15px; cursor: pointer; }
.tab.active { color: #fff; border-bottom-color: #3498db; }
.tab:hover { color: #fff; }
.badge { background: #3498db; color: #fff; border-radius: 10px; padding: 1px 7px; font-size: 12px; margin-left: 4px; }

.container { max-width: 900px; margin: 20px auto; padding: 0 16px; }
.panel { display: none; }
.panel.active { display: block; }

.card { background: #fff; border-radius: 12px; box-shadow: 0 4px 15px rgba(0,0,0,0.05); padding: 22px; margin-bottom: 20px; }
.card h2 { margin-bottom: 12px; color: #2c3e50; font-weight: 400; border-bottom: 2px solid #eee; padding-bottom: 10px; }
.hint { margin-bottom: 15px; color: #666; font-size: 0.92em; }
.note { margin-top: 12px; color: #7f8c8d; font-size: 0.85em; }

/* Visor 360 */
#viewer-container { width: 100%; height: 400px; background: #1a1a1a; border-radius: 8px; overflow: hidden; position: relative; }
.viewer-placeholder { color: #fff; display: flex; height: 100%; align-items: center; justify-content: center; text-align: center; padding: 20px; }
#viewer-container .psv-container { border-radius: 8px; }

/* Botones */
.btn { display: inline-block; padding: 12px 18px; border: none; border-radius: 6px; cursor: pointer; font-size: 15px; text-align: center; text-decoration: none; transition: background 0.3s; }
.btn-blue { background: #3498db; color: #fff; }
.btn-blue:hover { background: #2980b9; }
.btn-green { background: #27ae60; color: #fff; width: 100%; }
.btn-green:hover { background: #219150; }
.btn-green:disabled { background: #95a5a6; cursor: not-allowed; }
.btn-outline { background: transparent; color: #3498db; border: 1px solid #3498db; }
.btn-outline:hover { background: #eaf3fb; }
.row { display: flex; gap: 10px; flex-wrap: wrap; margin-top: 15px; align-items: center; }
.row .btn { flex: 1; min-width: 140px; }
input[type="file"] { display: none; }

/* Formularios */
.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
@media (max-width: 600px) { .form-grid { grid-template-columns: 1fr; } }
.form-group { margin-bottom: 15px; }
.form-group label { display: block; margin-bottom: 5px; font-weight: 600; }
.form-group select, .form-group input[type="text"], .form-group input[type="password"] { width: 100%; padding: 10px; border: 1px solid #ddd; border-radius: 6px; font-size: 15px; }
.form-group input[type="range"] { width: 100%; }

.status { margin-top: 10px; font-size: 0.9em; text-align: center; min-height: 1.2em; }
.status.ok { color: #27ae60; }
.status.err { color: #c0392b; }
.status.work { color: #3498db; }

#gen-result, #ai-edit-result { margin-top: 15px; }
#gen-image, #ai-edit-image { width: 100%; border-radius: 8px; display: block; }

/* Retoque */
.presets { display: flex; flex-wrap: wrap; gap: 8px; margin: 15px 0; }
.chip { background: #eaf3fb; color: #2c3e50; border: 1px solid #cfe3f5; border-radius: 20px; padding: 8px 14px; cursor: pointer; font-size: 14px; }
.chip.active { background: #3498db; color: #fff; border-color: #3498db; }
.sliders { display: grid; grid-template-columns: 1fr 1fr; gap: 0 18px; }
@media (max-width: 600px) { .sliders { grid-template-columns: 1fr; } }
#retouch-canvas { width: 100%; border-radius: 8px; margin-top: 5px; display: block; background: #eee; }

/* Consejos */
.tips-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 15px; }
@media (max-width: 600px) { .tips-grid { grid-template-columns: 1fr; } }
.tip-item { background: #e8f4fd; padding: 15px; border-left: 4px solid #3498db; border-radius: 4px; }
.tip-item strong { display: block; margin-bottom: 5px; color: #2c3e50; }

/* Galería */
.gallery-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(160px, 1fr)); gap: 12px; margin-top: 10px; }
.gallery-item { position: relative; border-radius: 8px; overflow: hidden; box-shadow: 0 2px 8px rgba(0,0,0,0.1); }
.gallery-item img { width: 100%; display: block; aspect-ratio: 4/3; object-fit: cover; }
.gallery-item .cap { font-size: 12px; padding: 6px 8px; background: #fff; color: #555; }
.gallery-item .actions { display: flex; gap: 6px; padding: 0 8px 8px; background: #fff; }
.gallery-item .actions button, .gallery-item .actions a { flex: 1; font-size: 12px; padding: 5px; border-radius: 4px; border: 1px solid #ddd; background: #f8f8f8; cursor: pointer; text-align: center; text-decoration: none; color: #333; }
#gallery-clear { margin-top: 15px; }

footer { text-align: center; padding: 20px; color: #7f8c8d; font-size: 0.85em; margin-top: 20px; max-width: 700px; margin-left: auto; margin-right: auto; }