/* Reset y configuración base */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Roboto', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    background: #000;
    min-height: 100vh;
    padding: 20px;
    color: #333;
}

.container {
    max-width: 1000px;
    margin: 0 auto;
}

/* Header */
header {
    text-align: center;
    color: white;
    margin-bottom: 40px;
    padding: 30px 20px;
}

header h1 {
    font-size: 3rem;
    margin-bottom: 15px;
    font-weight: 900;
    color: #ffffff;
    letter-spacing: -1px;
}

.subtitle {
    font-size: 1.2rem;
    color: #a0a0a0;
    font-weight: 400;
}

/* Card principal */
.card {
    background: #ffffff;
    border-radius: 30px;
    box-shadow: 0 30px 80px rgba(0, 0, 0, 0.5);
    padding: 50px;
    margin-bottom: 30px;
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
}

/* Selector de tipo de QR */
.type-selector {
    display: flex;
    gap: 12px;
    margin-bottom: 40px;
    flex-wrap: wrap;
    justify-content: center;
}

.type-btn {
    padding: 14px 28px;
    border: 2px solid #F7F8FD;
    background: white;
    border-radius: 50px;
    font-size: 0.95rem;
    font-weight: 700;
    cursor: pointer;
    transition: all 0.3s ease;
    color: #333;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.type-btn:hover {
    border-color: #FFCE00;
    color: #000;
    transform: translateY(-3px);
    box-shadow: 0 8px 20px rgba(255, 206, 0, 0.3);
}

.type-btn.active {
    background: #FFCE00;
    color: #000;
    border-color: #FFCE00;
    box-shadow: 0 8px 25px rgba(255, 206, 0, 0.4);
}

/* Sección de input */
.input-section {
    width: 100%;
}

/* Formularios */
.qr-form {
    display: none;
}

.qr-form.active {
    display: block;
}

/* Scroll interno para formularios largos */
.scrollable-form {
    max-height: 450px;
    overflow-y: auto;
    padding-right: 10px;
    margin-bottom: 20px;
}

/* Scrollbar personalizado */
.scrollable-form::-webkit-scrollbar {
    width: 8px;
}

.scrollable-form::-webkit-scrollbar-track {
    background: #F7F8FD;
    border-radius: 10px;
}

.scrollable-form::-webkit-scrollbar-thumb {
    background: #FFCE00;
    border-radius: 10px;
}

.scrollable-form::-webkit-scrollbar-thumb:hover {
    background: #e6b900;
}

.form-section-title {
    color: #000;
    font-size: 1.1rem;
    font-weight: 900;
    margin-top: 25px;
    margin-bottom: 15px;
    padding-bottom: 10px;
    border-bottom: 3px solid #FFCE00;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.form-section-title:first-child {
    margin-top: 0;
}

.input-grid-2 {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 15px;
    margin-bottom: 15px;
}

.input-section label {
    display: block;
    font-weight: 700;
    margin-bottom: 8px;
    margin-top: 15px;
    color: #333;
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 0.3px;
}

.input-section label:first-child {
    margin-top: 0;
}

.input-field {
    width: 100%;
    padding: 14px 18px;
    border: 2px solid #F7F8FD;
    border-radius: 15px;
    font-size: 1rem;
    font-family: 'Roboto', sans-serif;
    transition: all 0.3s;
    background: #F7F8FD;
    font-weight: 500;
}

textarea.input-field {
    resize: vertical;
    min-height: 100px;
}

.input-field:focus {
    outline: none;
    border-color: #FFCE00;
    background: white;
    box-shadow: 0 0 0 4px rgba(255, 206, 0, 0.1);
}

/* Opciones de personalización */
.options {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 20px;
    margin-top: 30px;
    margin-bottom: 25px;
}

/* Sección de logo */
.logo-section {
    margin: 30px 0;
    padding: 25px;
    background: #F7F8FD;
    border-radius: 20px;
    border: 2px dashed #FFCE00;
}

.logo-label {
    display: flex;
    align-items: center;
    gap: 12px;
    cursor: pointer;
    font-weight: 700;
    font-size: 1rem;
    color: #000;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.logo-checkbox {
    width: 22px;
    height: 22px;
    cursor: pointer;
    accent-color: #FFCE00;
}

#logo-upload-section {
    margin-top: 20px;
}

.logo-upload-area {
    position: relative;
    border: 3px dashed #FFCE00;
    border-radius: 20px;
    padding: 40px 20px;
    text-align: center;
    background: white;
    cursor: pointer;
    transition: all 0.3s ease;
}

.logo-upload-area:hover {
    border-color: #e6b900;
    background: #fffef8;
}

.upload-placeholder svg {
    color: #FFCE00;
    margin-bottom: 15px;
}

.upload-placeholder p {
    font-weight: 700;
    font-size: 1.1rem;
    color: #000;
    margin-bottom: 8px;
}

.upload-placeholder span {
    font-size: 0.85rem;
    color: #666;
}

.logo-preview {
    position: relative;
    display: inline-block;
}

.logo-preview img {
    max-width: 150px;
    max-height: 150px;
    border-radius: 15px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
}

.btn-remove-logo {
    position: absolute;
    top: -10px;
    right: -10px;
    background: #000;
    color: white;
    border: none;
    border-radius: 50%;
    width: 32px;
    height: 32px;
    font-size: 18px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.3);
    transition: all 0.3s ease;
}

.btn-remove-logo:hover {
    background: #FFCE00;
    color: #000;
    transform: scale(1.1);
}

.logo-size-control {
    margin-top: 20px;
    padding: 20px;
    background: white;
    border-radius: 15px;
}

.logo-size-control label {
    display: block;
    font-weight: 700;
    margin-bottom: 12px;
    color: #000;
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.logo-slider {
    width: 100%;
    height: 8px;
    border-radius: 10px;
    background: #F7F8FD;
    outline: none;
    -webkit-appearance: none;
}

.logo-slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 24px;
    height: 24px;
    border-radius: 50%;
    background: #FFCE00;
    cursor: pointer;
    box-shadow: 0 2px 8px rgba(255, 206, 0, 0.4);
    transition: all 0.3s ease;
}

.logo-slider::-webkit-slider-thumb:hover {
    transform: scale(1.2);
    box-shadow: 0 4px 12px rgba(255, 206, 0, 0.6);
}

.logo-slider::-moz-range-thumb {
    width: 24px;
    height: 24px;
    border-radius: 50%;
    background: #FFCE00;
    cursor: pointer;
    border: none;
    box-shadow: 0 2px 8px rgba(255, 206, 0, 0.4);
}

#logo-size-value {
    display: inline-block;
    margin-left: 12px;
    font-weight: 700;
    color: #FFCE00;
    font-size: 1.1rem;
}

.option-group label {
    display: block;
    font-size: 0.85rem;
    margin-bottom: 8px;
    color: #333;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.option-group select,
.option-group input[type="color"] {
    width: 100%;
    padding: 14px;
    border: 2px solid #F7F8FD;
    border-radius: 15px;
    font-size: 1rem;
    cursor: pointer;
    transition: all 0.3s;
    background: #F7F8FD;
    font-weight: 600;
}

.option-group select:focus,
.option-group input[type="color"]:focus {
    outline: none;
    border-color: #FFCE00;
    background: white;
}

.option-group input[type="color"] {
    height: 55px;
}

/* Botones */
.btn-primary,
.btn-reset {
    padding: 18px 40px;
    border: none;
    border-radius: 50px;
    font-size: 1.1rem;
    font-weight: 900;
    cursor: pointer;
    transition: all 0.3s ease;
    width: 100%;
    margin-top: 15px;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.btn-primary {
    background: #FFCE00;
    color: #000;
    box-shadow: 0 10px 30px rgba(255, 206, 0, 0.4);
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 15px 40px rgba(255, 206, 0, 0.5);
    background: #e6b900;
}

.btn-primary:active {
    transform: translateY(-1px);
}

.btn-reset {
    background: #000;
    color: white;
    margin-top: 20px;
}

.btn-reset:hover {
    background: #1a1a1a;
    transform: translateY(-3px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
}

/* Sección de resultado */
.result-section {
    margin-top: 50px;
    text-align: center;
}

.result-divider {
    height: 3px;
    background: linear-gradient(to right, transparent, #FFCE00 20%, #FFCE00 80%, transparent);
    margin-bottom: 40px;
}

.result-section h3 {
    color: #000;
    margin-bottom: 35px;
    font-size: 1.8rem;
    font-weight: 900;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.qr-display-wrapper {
    display: flex;
    justify-content: center;
    margin-bottom: 35px;
}

.qr-display {
    padding: 30px;
    background: #F7F8FD;
    border-radius: 25px;
    border: 3px solid #F7F8FD;
    display: inline-block;
}

#qrcode img,
#qrcode canvas {
    display: block;
    margin: 0 auto;
    max-width: 100%;
    height: auto;
    border-radius: 15px;
}

/* Opciones de descarga */
.download-options {
    margin: 30px 0;
}

.download-options label {
    display: block;
    font-weight: 900;
    margin-bottom: 15px;
    color: #000;
    font-size: 1rem;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.format-buttons {
    display: flex;
    gap: 12px;
    justify-content: center;
}

.btn-format {
    padding: 14px 32px;
    border: 2px solid #F7F8FD;
    background: white;
    border-radius: 50px;
    font-size: 1rem;
    font-weight: 700;
    cursor: pointer;
    transition: all 0.3s ease;
    color: #333;
    min-width: 110px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.btn-format:hover {
    border-color: #FFCE00;
    background: #FFCE00;
    color: #000;
    transform: translateY(-3px);
    box-shadow: 0 8px 25px rgba(255, 206, 0, 0.4);
}

.btn-format:active {
    transform: translateY(-1px);
}

/* Footer */
footer {
    text-align: center;
    color: #888;
    padding: 30px;
    font-size: 0.9rem;
}

footer p {
    margin: 0;
    font-weight: 500;
}

/* Responsive */
@media (max-width: 768px) {
    header h1 {
        font-size: 2.2rem;
    }

    .card {
        padding: 35px 25px;
        border-radius: 25px;
    }

    .options {
        grid-template-columns: 1fr;
    }

    .type-selector {
        gap: 8px;
    }

    .type-btn {
        font-size: 0.85rem;
        padding: 12px 22px;
    }

    .format-buttons {
        flex-direction: column;
        width: 100%;
    }

    .btn-format {
        width: 100%;
    }
}

@media (max-width: 480px) {
    body {
        padding: 10px;
    }

    header h1 {
        font-size: 1.9rem;
    }

    .subtitle {
        font-size: 1rem;
    }

    .card {
        padding: 25px 20px;
    }

    .type-btn {
        padding: 10px 18px;
        font-size: 0.8rem;
        flex: 1;
        min-width: 100px;
    }

    .qr-display {
        padding: 20px;
    }
    
    .scrollable-form {
        max-height: 400px;
        padding-right: 5px;
    }
    
    .input-grid-2 {
        grid-template-columns: 1fr;
        gap: 0;
    }
}

/* Animación de entrada */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.card {
    animation: fadeIn 0.6s ease-out;
}

/* Mejoras visuales adicionales */
.input-field::placeholder {
    color: #aaa;
    font-weight: 400;
}

.option-group select {
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%23333' d='M6 9L1 4h10z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 14px center;
    padding-right: 40px;
}